class_name SandboxStage
extends Node2D
## SandboxStage - Kid-friendly director sandbox stage (Phase 2).
##
## A self-contained visual stage for placing terrain, props and stickmen from a
## palette, with EDIT (build) and PLAY (simulate) modes. Selection uses geometric
## hit-testing; objects are dragged directly (no move handle) and rotated via a
## ring handle. A placement ghost previews the object under the cursor, and an
## optional snap-to-grid + grid overlay ease placement. NOT wired into the editor
## - run standalone via F6 on res://scenes/sandbox_stage.tscn.

# ---------------------------------------------------------------------------
# Preloaded helpers
# ---------------------------------------------------------------------------

const STAGE_SPAWNER := preload("res://scripts/stage_spawner.gd")
const STAGE_SELECTION := preload("res://scripts/stage_selection.gd")
const STAGE_GIZMOS := preload("res://scripts/stage_gizmos.gd")
const STAGE_GRID := preload("res://scripts/stage_grid.gd")
const STICKMAN_RIG := preload("res://scripts/stickman_rig.gd")
const STAGE_DIRECTOR_VISUALS := preload("res://scripts/stage_director_visuals.gd")
const STAGE_PLACEMENT_OVERLAY := preload("res://scripts/stage_placement_overlay.gd")
const ASSET_SELECTOR := preload("res://scenes/asset_selector.tscn")
const STICKMAN_LIBRARY := preload("res://scripts/stickman_library.gd")
const PROP_LIBRARY := preload("res://scripts/prop_library.gd")
const THUMBNAIL_CACHE := preload("res://scripts/thumbnails/thumbnail_cache.gd")
const STICKMAN_THUMBNAIL := preload("res://scripts/thumbnails/stickman_thumbnail.gd")
const PROP_THUMBNAIL := preload("res://scripts/thumbnails/prop_thumbnail.gd")

# ---------------------------------------------------------------------------
# Enums
# ---------------------------------------------------------------------------

enum StageMode { EDIT, DIRECT, PLAY }

## Phase 4 rule-builder state machine steps.
enum RuleStep { IDLE, SELECT_TRIGGER, TRIGGER_TARGET, SELECT_ACTION, ACTION_TARGET, ACTION_POSITION, PARAMS }

# ---------------------------------------------------------------------------
# Signals
# ---------------------------------------------------------------------------

signal mode_changed(mode: int)
signal object_placed(node: Node2D)
signal object_selected(nodes: Array[Node2D])
signal object_deselected()
signal object_deleted(nodes: Array[Node2D])

# ---------------------------------------------------------------------------
# Constants
# ---------------------------------------------------------------------------

const ZOOM_STEP: float = 1.10
const MIN_BOX_AREA: float = 16.0
const RAGDOLL_CONTAINER_NAME := "RagdollBodyContainer"
const SELECTOR_DIM_ALPHA := 0.5

const SETTINGS_PATH := "user://sandbox_settings.json"
const THEME_PATH := "res://sandbox_theme.json"
const DEFAULT_GRID_SIZE := 15.0
const MIN_GRID_SIZE := 1.0
const MAX_GRID_SIZE := 100.0

## Director action-popup item ids (Phase 3a).
const ACT_WALK := 0
const ACT_SPEAK := 1
const ACT_WAIT := 2
const ACT_RAGDOLL := 3
const ACT_RECOVER := 4

## Phase 4 rule-builder item ids. ACT_WHEN appends to the action popup; the
## TRIG_* ids drive the trigger sub-menu.
const ACT_WHEN := 5
const TRIG_ARRIVED := 0
const TRIG_ACTION_FINISHED := 1
const TRIG_SPEECH_FINISHED := 2
const TRIG_ENTERED_AREA := 3
const TRIG_COLLIDED := 4
const TRIG_BACK := 5

## Phase 4 "add another / done" popup item ids.
const RULE_MORE_ADD := 0
const RULE_MORE_DONE := 1

## Phase 4 "done" item id for the rule-action popup (edit mode only). Distinct
## from ACT_WALK..ACT_RECOVER (0..4) so it never collides with an action id.
const RULE_ACTION_DONE := 6

## Max distance (px) between an arrival event position and a rule's waypoint for
## the arrived_at_waypoint trigger to match.
const WAYPOINT_MATCH_EPSILON := 24.0

## Debug gate for the Phase 3a stage trace. Ship OFF.
const DEBUG_STAGE := false

## Prints a `[stage] `-prefixed message only when DEBUG_STAGE is on.
func _stage_dbg(msg: String) -> void:
	if DEBUG_STAGE:
		print("[stage] ", msg)

# ---------------------------------------------------------------------------
# Exported properties
# ---------------------------------------------------------------------------

@export var min_zoom: float = 0.1
@export var max_zoom: float = 6.0

# ---------------------------------------------------------------------------
# Node references
# ---------------------------------------------------------------------------

@onready var _camera: Camera2D = $Camera2D
@onready var _world: Node2D = $World

# ---------------------------------------------------------------------------
# State
# ---------------------------------------------------------------------------

var current_mode: StageMode = StageMode.EDIT

var _spawner: StageSpawner
var _selection: StageSelection
var _gizmos: StageGizmos
var _grid: StageGrid
var _placement_overlay = null               # StagePlacementOverlay (preloaded)

var _placement_id: String = ""

var _stickman_library: StickmanLibrary
var _thumbnail_cache: ThumbnailCache
var _stickman_thumb: StickmanThumbnail
var _prop_thumb: PropThumbnail
var _selector: AssetSelector = null
var _selector_open: bool = false
var _selector_kind: String = ""
var _selector_dim: ColorRect = null
var _browse_dialog: FileDialog = null
var _thumbnail_queue: Array[Dictionary] = []
var _thumbnail_busy: bool = false

var _mode_buttons: Dictionary = {}          # int (StageMode) -> Button
var _palette_buttons: Dictionary = {}
var _status_label: Label
var _status_cursor_coords: Label
var _direct_hint_label: Label
var _mode_frame: Panel
var _mode_badge: PanelContainer
var _mode_badge_label: Label
var _tooltip: Label
var _grid_check: CheckBox
var _snap_check: CheckBox
var _grid_size_spin: SpinBox
var _grid_size_label: Label

var _grid_size: float = DEFAULT_GRID_SIZE
var _snap_enabled: bool = false
var _show_grid: bool = true

var _panning: bool = false
var _pan_last: Vector2 = Vector2.ZERO

var _box_selecting: bool = false
var _box_start: Vector2 = Vector2.ZERO
var _box_rect: Rect2 = Rect2()

var _ghost: Node2D = null
var _ghost_holder: Node2D = null

## Phase 4b terrain drag-painting state.
var _terrain_dragging: bool = false
var _terrain_anchor_cell: Vector2i = Vector2i.ZERO
var _terrain_target_cell: Vector2i = Vector2i.ZERO
var _drag_cells: Array[Vector2i] = []
var _last_drag_cells: Array[Vector2i] = []
var _ghost_array: Array[Node2D] = []

## Block cells already stamped during the CURRENT drag (in-drag self-overlap
## skip, 3-state Case B).
var _drag_painted: Dictionary = {}

## Grid spatial dictionary: cell (Vector2i, TERRAIN_GRID_SIZE) -> Array[Node2D]
## whose world AABB overlaps that cell. Advisory only (3-state tint + skip);
## never authoritative for physics.
var _grid_cells: Dictionary = {}

## Authored object state (instance id -> {node, position, rotation}), updated on
## every place/move/rotate and restored when returning to EDIT.
var _authored: Dictionary = {}

## Physics frames remaining before re-asserting the authored restore (a safety
## net for engines where a same-frame freeze + teleport does not stick).
var _restore_frames_left: int = 0

# ---------------------------------------------------------------------------
# Director state (Phase 3a)
# ---------------------------------------------------------------------------

var _action_popup: PopupMenu = null
var _context_rig: StickmanRig = null
var _pending_walk_target: bool = false
var _speak_dialog: AcceptDialog = null
var _speak_edit: LineEdit = null
var _wait_dialog: AcceptDialog = null
var _wait_spin: SpinBox = null
var _director_visuals = null                  # StageDirectorVisuals (preloaded)

var _nav_region: NavigationRegion2D = null
var _nav_dirty: bool = true

# ---------------------------------------------------------------------------
# Theme / cursor state (Phase 4b)
# ---------------------------------------------------------------------------

## Parsed sandbox_theme.json (or {} if missing/malformed).
var _theme: Dictionary = {}
var _theme_grid_default: float = DEFAULT_GRID_SIZE
var _accent_edit: Color = Color("#22c6ff")
var _accent_direct: Color = Color("#ffb300")
var _accent_play: Color = Color("#33dd77")
var _guide_line_color: Color = Color("#22c6ff")
var _action_popup_font_size: int = 24
var _tooltip_font_size: int = 18
var _status_pill_font_size: int = 16
var _ui_font: Font = null
var _emoji_font: Font = null

var _action_cursor: ImageTexture = null
var _last_awaiting_click: bool = false

# ---------------------------------------------------------------------------
# Rule / event system state (Phase 4)
# ---------------------------------------------------------------------------

## Stored "When X -> do Y" rules. Persist across mode toggles; NOT saved to disk.
var _event_rules: Array[Dictionary] = []
var _next_rule_id: int = 0

## Rule-builder state machine.
var _rule_step: RuleStep = RuleStep.IDLE
var _rule_builder: Dictionary = {}
var _rule_context_rig: StickmanRig = null
var _rule_hint: String = ""
var _rule_editing_id: int = -1

## Session popup anchor: the first context menu of a rule session records its
## screen rect; all child popups in that session reuse it. Cleared on confirm
## or cancel so the next session re-records from a fresh click.
var _popup_anchor: Rect2i = Rect2i()
var _popup_anchor_set: bool = false

## Rule-builder popups (built in _build_ui).
var _trigger_popup: PopupMenu = null
var _rule_action_popup: PopupMenu = null
var _rule_more_popup: PopupMenu = null

## Edge-trigger bookkeeping for the geometric engine, keyed "<area_id>:<node_id>"
## and "<rig_id>:<prop_id>".
var _area_overlap: Dictionary = {}
var _collision_pairs: Dictionary = {}

## Lightweight toast text + countdown (cleared in _process on expiry).
var _toast_text: String = ""
var _toast_timer: float = 0.0

# ---------------------------------------------------------------------------
# Lifecycle
# ---------------------------------------------------------------------------

func _ready() -> void:
	_camera.make_current()
	_load_theme()
	_grid_size = _theme_grid_default
	_load_settings()

	_spawner = STAGE_SPAWNER.new(_world)
	_stickman_library = STICKMAN_LIBRARY.new()
	_thumbnail_cache = THUMBNAIL_CACHE.new()
	_stickman_thumb = STICKMAN_THUMBNAIL.new()
	_prop_thumb = PROP_THUMBNAIL.new()
	add_child(_stickman_thumb)
	add_child(_prop_thumb)
	_selection = STAGE_SELECTION.new(_world, _camera)
	_selection.selection_changed.connect(_on_selection_changed)
	_selection.hover_changed.connect(_on_hover_changed)

	_build_action_cursor()
	_build_grid_layer()
	_build_gizmo_layer()
	_build_director_visuals()
	_build_navigation()
	_build_ghost_holder()
	_build_placement_overlay()
	_build_ui()
	_apply_theme_to_visuals()
	_rebuild_grid_cells()
	_apply_grid_settings()
	_apply_mode_frame()
	_sync_mode_buttons()
	_refresh_mode_badge()
	_apply_cursor()
	_refresh_status()


func _process(delta: float) -> void:
	_drain_thumbnail_queue()
	if _nav_dirty:
		_nav_dirty = false
		_rebake_navigation()
	if current_mode == StageMode.EDIT:
		if _terrain_dragging:
			_update_terrain_drag(_camera.get_global_mouse_position())
		elif _ghost != null and is_instance_valid(_ghost):
			_update_ghost_position()
	_update_cursor_coords()
	_update_action_overlay()
	_sync_awaiting_cursor()
	if _toast_timer > 0.0:
		_toast_timer -= delta
		if _toast_timer <= 0.0:
			_toast_text = ""
			_refresh_status()


func _physics_process(_delta: float) -> void:
	if _restore_frames_left > 0:
		_restore_frames_left -= 1
		_restore_authored_state()
	if current_mode == StageMode.PLAY:
		_update_area_entry()
		_update_stickman_prop_collision()

# ---------------------------------------------------------------------------
# Input
# ---------------------------------------------------------------------------

func _input(event: InputEvent) -> void:
	if event is InputEventMagnifyGesture:
		# Touchpad pinch zoom.
		_set_zoom(_camera.zoom.x * (event as InputEventMagnifyGesture).factor)
	elif event is InputEventPanGesture:
		# Touchpad two-finger pan (delta is screen px; ×3 for speed parity).
		_camera.position -= (event as InputEventPanGesture).delta * 3.0 / _camera.zoom.x
	elif event is InputEventMouseButton:
		_handle_mouse_button(event)
	elif event is InputEventMouseMotion:
		_handle_mouse_motion(event)


func _unhandled_input(event: InputEvent) -> void:
	if event is InputEventMouseButton:
		_handle_world_click(event)


func _unhandled_key_input(event: InputEvent) -> void:
	if not (event is InputEventKey) or not event.pressed or event.echo:
		return
	match event.keycode:
		KEY_DELETE, KEY_BACKSPACE:
			if current_mode == StageMode.EDIT:
				delete_selected()
		KEY_ESCAPE:
			if _rule_step != RuleStep.IDLE:
				_cancel_rule_build()
			elif _pending_walk_target:
				_pending_walk_target = false
				_context_rig = null
				_apply_cursor()
				_refresh_status()
			elif _terrain_dragging:
				_cancel_terrain_drag()
			elif _selector_open:
				_on_selector_cancelled()
			elif current_mode == StageMode.DIRECT:
				set_mode(StageMode.EDIT)
			elif _placement_id != "":
				set_placement_mode("")
			elif not _selection.get_selected().is_empty():
				_selection.clear_selection()


func _handle_mouse_button(mb: InputEventMouseButton) -> void:
	match mb.button_index:
		MOUSE_BUTTON_WHEEL_UP:
			if mb.pressed:
				_set_zoom(_camera.zoom.x * ZOOM_STEP)
		MOUSE_BUTTON_WHEEL_DOWN:
			if mb.pressed:
				_set_zoom(_camera.zoom.x / ZOOM_STEP)
		MOUSE_BUTTON_MIDDLE:
			_panning = mb.pressed
			_pan_last = mb.position


func _handle_world_click(mb: InputEventMouseButton) -> void:
	if _selector_open:
		return
	if current_mode == StageMode.PLAY:
		return
	# RMB ends draw/placement mode in EDIT (Phase 4b build cancelling). LMB keeps
	# the Phase 2 repeated-placement behavior.
	if mb.button_index == MOUSE_BUTTON_RIGHT:
		if mb.pressed and current_mode == StageMode.EDIT and _placement_id != "":
			_cancel_terrain_drag()
			set_placement_mode("")
		return
	if mb.button_index != MOUSE_BUTTON_LEFT:
		return
	var world_pos := _camera.get_global_mouse_position()
	# Rule-builder click routing is highest priority (Phase 4).
	if _rule_step != RuleStep.IDLE:
		if mb.pressed:
			_handle_rule_click(world_pos)
		return
	# Rule label / delete icon hit-testing, before gizmo/placement/selection.
	var rule_hit: Dictionary = _director_visuals.hit_test_rule(world_pos)
	if not rule_hit.is_empty() and mb.pressed:
		if rule_hit["part"] == "delete":
			_delete_rule(int(rule_hit["id"]))
		else:
			_begin_edit_rule(int(rule_hit["id"]))
		return
	if current_mode == StageMode.DIRECT:
		if mb.pressed:
			_handle_direct_click(world_pos)
		return
	# EDIT mode: a terrain drag commits on release.
	if _terrain_dragging:
		if not mb.pressed:
			_commit_terrain_drag()
		return
	if mb.pressed:
		if _gizmos.hit_test(world_pos) != STAGE_GIZMOS.Handle.NONE:
			_gizmos.begin_drag(world_pos)
		elif _placement_id != "":
			if _spawner.is_terrain_id(_placement_id):
				_begin_terrain_drag(world_pos)
			else:
				_place_at(world_pos)
		else:
			_begin_click_select(world_pos, mb.shift_pressed)
	else:
		if _gizmos.is_dragging():
			_gizmos.end_drag()
		elif _box_selecting:
			_finish_box_select(mb.shift_pressed)


func _handle_mouse_motion(mm: InputEventMouseMotion) -> void:
	if _selector_open:
		return
	if _panning:
		_camera.position -= mm.relative / _camera.zoom.x
		return
	if current_mode == StageMode.PLAY:
		return
	var world_pos := _camera.get_global_mouse_position()
	if _gizmos.is_dragging():
		_gizmos.drag_to(world_pos)
		_director_visuals.mark_dirty()
	elif _box_selecting:
		_box_rect = Rect2(_box_start, world_pos - _box_start)
		_gizmos.set_box_rect(_box_rect)
	elif not _is_mouse_over_ui() and current_mode == StageMode.EDIT:
		_selection.update_hover(world_pos)

# ---------------------------------------------------------------------------
# Mode management
# ---------------------------------------------------------------------------

func set_mode(mode: StageMode) -> void:
	if mode == current_mode:
		return
	current_mode = mode
	match mode:
		StageMode.EDIT:
			_enter_edit_mode()
		StageMode.DIRECT:
			_enter_direct_mode()
		StageMode.PLAY:
			_enter_play_mode()
	_sync_mode_buttons()
	_apply_grid_settings()
	_apply_mode_frame()
	_refresh_mode_badge()
	_apply_cursor()
	mode_changed.emit(int(mode))
	_refresh_status()


func _enter_edit_shared() -> void:
	# Snap stickmen straight back to their standing pose/position (no stand-up
	# tween glide), stopping any director queue first.
	for node: Node2D in _world_children_selectable():
		if node is STICKMAN_RIG:
			var rig := node as STICKMAN_RIG
			rig.stop_queue()
			rig.snap_to_standing()
			rig.clear_reactive_actions()
	# Freeze every prop (kinematic) so nothing keeps falling in EDIT — including
	# any object that may not be in the authored map. freeze_mode is set BEFORE
	# freeze so the body freezes directly as kinematic, never via the static
	# layer (whose transform sync can drop a subsequent position/rotation set).
	for node: Node2D in _world_children_selectable():
		if node is RigidBody2D:
			var body := node as RigidBody2D
			body.freeze_mode = RigidBody2D.FREEZE_MODE_KINEMATIC
			body.freeze = true
	_restore_authored_state()
	# The freeze/teleport can take a physics frame or two to settle in the engine,
	# so re-assert the authored transform on the next few physics frames.
	_restore_frames_left = 3
	_gizmos.set_enabled(true)
	_director_visuals.set_enabled(true)
	# Clear edge-trigger state so PLAY overlaps do not leak stale results.
	_area_overlap.clear()
	_collision_pairs.clear()


func _enter_edit_mode() -> void:
	_enter_edit_shared()
	_clear_director_pending()
	_set_edit_controls_visible(true)
	_set_direct_controls_visible(false)


## Cancels any in-progress director/rule-builder click flows when leaving a mode
## (a pending walk target or a half-built When->Then rule must not survive into
## another mode where its click routing would mis-fire).
func _clear_director_pending() -> void:
	_clear_popup_anchor()
	_pending_walk_target = false
	_context_rig = null
	if _rule_step != RuleStep.IDLE:
		_cancel_rule_build()
	if _action_popup != null:
		_action_popup.hide()


## Direct is internally an "edit-with-direct" state: same freeze/stand/gizmo
## side effects, but with the spawner/grid controls hidden, the director hint
## shown, and any placement/selection/pending-target cleared.
func _enter_direct_mode() -> void:
	_enter_edit_shared()
	set_placement_mode("")
	_selection.clear_selection()
	_clear_director_pending()
	_set_edit_controls_visible(false)
	_set_direct_controls_visible(true)


func _enter_play_mode() -> void:
	_gizmos.set_enabled(false)
	_selection.clear_selection()
	set_placement_mode("")
	_clear_director_pending()
	_director_visuals.set_enabled(false)
	_set_edit_controls_visible(false)
	_set_direct_controls_visible(false)
	# Clear edge-trigger state so PLAY overlaps start from a clean slate.
	_area_overlap.clear()
	_collision_pairs.clear()
	for node: Node2D in _world_children_selectable():
		if node is RigidBody2D:
			(node as RigidBody2D).freeze = false
	var rig_count := 0
	for node: Node2D in _world_children_selectable():
		if node is STICKMAN_RIG:
			var rig := node as STICKMAN_RIG
			rig.auto_recover = false
			rig.start_queue()
			rig_count += 1
	_stage_dbg("PLAY rigs=%d" % rig_count)


func _save_object_state(node: Node2D) -> void:
	_authored[node.get_instance_id()] = {
		"node": node,
		"position": node.global_position,
		"rotation": node.global_rotation,
	}


func _clear_object_state(node: Node2D) -> void:
	_authored.erase(node.get_instance_id())


func _restore_authored_state() -> void:
	for id: int in _authored.keys():
		var entry: Dictionary = _authored[id]
		var node := entry.get("node") as Node2D
		if node == null or not is_instance_valid(node):
			_authored.erase(id)
			continue
		node.global_position = entry.get("position", node.global_position)
		node.global_rotation = entry.get("rotation", node.global_rotation)
		if node is RigidBody2D:
			var body := node as RigidBody2D
			body.linear_velocity = Vector2.ZERO
			body.angular_velocity = 0.0

# ---------------------------------------------------------------------------
# Placement
# ---------------------------------------------------------------------------

func set_placement_mode(id: String) -> void:
	_placement_id = id
	for pid: String in _palette_buttons:
		var btn: Button = _palette_buttons[pid]
		btn.set_pressed_no_signal(pid == id)
	if id == "":
		_free_ghost()
		_free_terrain_ghosts()
		_end_terrain_drag()
	else:
		_spawn_ghost()


func _place_at(world_pos: Vector2) -> void:
	if _snap_enabled:
		world_pos = _snap_to_grid(world_pos)
	var node := _spawner.spawn(_placement_id, world_pos)
	if node == null:
		return
	_finalize_placed_node(node)
	if node is TerrainBlock:
		_nav_dirty = true
	_rebuild_grid_cells()
	object_placed.emit(node)
	_refresh_status()
	_spawn_ghost()


## Common post-spawn wiring: freeze kinematic props in EDIT, save authored state,
## and connect the Phase 3a/4 signals for stickmen/props.
func _finalize_placed_node(node: Node2D) -> void:
	if current_mode == StageMode.EDIT and node is RigidBody2D:
		var body := node as RigidBody2D
		body.freeze_mode = RigidBody2D.FREEZE_MODE_KINEMATIC
		body.freeze = true
	_save_object_state(node)
	if node is STICKMAN_RIG:
		var rig := node as STICKMAN_RIG
		rig.queue_changed.connect(_director_visuals.mark_dirty)
		rig.arrived.connect(_on_rig_arrived.bind(rig))
		rig.action_finished.connect(_on_rig_action_finished.bind(rig))
		rig.speech_finished.connect(_on_rig_speech_finished.bind(rig))
		_director_visuals.mark_dirty()
	if node is PropBlock:
		var prop := node as PropBlock
		prop.collided.connect(_on_prop_collided.bind(prop))


func _spawn_ghost() -> void:
	_free_ghost()
	if _placement_id == "":
		return
	var ghost := _spawner.spawn(_placement_id, Vector2.ZERO)
	if ghost == null:
		return
	# Reparent out of World so the ghost is not selectable/counted.
	if ghost.get_parent() == _world:
		_world.remove_child(ghost)
	_ghost_holder.add_child(ghost)
	ghost.modulate = Color(1.0, 1.0, 1.0, 0.5)
	_configure_ghost_collision(ghost)
	_ghost = ghost
	_update_ghost_position()


## Disables collision / freezes a ghost so it never participates in physics or
## selection, and stops a ghost stickman's IK + animation.
func _configure_ghost_collision(ghost: Node2D) -> void:
	if ghost is RigidBody2D:
		var body := ghost as RigidBody2D
		body.freeze_mode = RigidBody2D.FREEZE_MODE_KINEMATIC
		body.freeze = true
		body.collision_layer = 0
		body.collision_mask = 0
	elif ghost is StaticBody2D:
		var sb := ghost as StaticBody2D
		sb.collision_layer = 0
		sb.collision_mask = 0
	elif ghost is STICKMAN_RIG:
		var rig := ghost as STICKMAN_RIG
		var skeleton := rig.get_node_or_null(NodePath("Skeleton2D")) as Skeleton2D
		if skeleton != null and skeleton.modification_stack != null:
			skeleton.modification_stack.enabled = false
		var anim := rig.get_node_or_null(NodePath("AnimationPlayer")) as AnimationPlayer
		if anim != null:
			anim.stop()


func _free_ghost() -> void:
	if _ghost != null and is_instance_valid(_ghost):
		_ghost.queue_free()
	_ghost = null


func _update_ghost_position() -> void:
	if _ghost == null or not is_instance_valid(_ghost):
		return
	var pos := _camera.get_global_mouse_position() + _spawner.get_spawn_offset(_placement_id)
	if _is_terrain_placement():
		pos = _terrain_cell_center(_world_to_terrain_cell(pos))
	elif _snap_enabled:
		pos = _snap_to_grid(pos)
	_ghost.position = pos

# ---------------------------------------------------------------------------
# Terrain drag-painting (Phase 4b)
# ---------------------------------------------------------------------------

func _is_terrain_placement() -> bool:
	return _spawner.is_terrain_id(_placement_id)


## Paint stride = the active terrain template's AABB extent per axis (decision
## D1). Falls back to TERRAIN_GRID_SIZE for a non-terrain / empty placement so
## the quantizers never divide by zero.
func _terrain_stride() -> Vector2:
	var size: Vector2 = _spawner.get_template_aabb(_placement_id).size
	if size.x <= 0.0001 or size.y <= 0.0001:
		return Vector2(STAGE_SPAWNER.TERRAIN_GRID_SIZE, STAGE_SPAWNER.TERRAIN_GRID_SIZE)
	return size


func _world_to_terrain_cell(pos: Vector2) -> Vector2i:
	var s := _terrain_stride()
	return Vector2i(int(roundf(pos.x / s.x)), int(roundf(pos.y / s.y)))


func _terrain_cell_center(cell: Vector2i) -> Vector2:
	var s := _terrain_stride()
	return Vector2(cell.x * s.x, cell.y * s.y)


## 16-px grid cell for the advisory _grid_cells dictionary lookups (NOT the
## block-unit paint cell). Used by _is_target_valid.
func _world_to_grid_cell(pos: Vector2) -> Vector2i:
	var gs := STAGE_SPAWNER.TERRAIN_GRID_SIZE
	return Vector2i(int(roundf(pos.x / gs)), int(roundf(pos.y / gs)))


## World AABB of the block that would be stamped at `cell` (block center +
## the template's local AABB).
func _block_aabb(cell: Vector2i) -> Rect2:
	var local: Rect2 = _spawner.get_template_aabb(_placement_id)
	return Rect2(_terrain_cell_center(cell) + local.position, local.size)


func _begin_terrain_drag(world_pos: Vector2) -> void:
	_free_ghost()
	_drag_painted.clear()
	_terrain_dragging = true
	_terrain_anchor_cell = _world_to_terrain_cell(world_pos)
	_terrain_target_cell = _terrain_anchor_cell
	_update_terrain_drag(world_pos)


func _update_terrain_drag(world_pos: Vector2) -> void:
	if not _terrain_dragging:
		return
	var target := _world_to_terrain_cell(world_pos)
	if Input.is_key_pressed(KEY_SHIFT):
		var d := target - _terrain_anchor_cell
		if absi(d.x) >= absi(d.y):
			target = Vector2i(_terrain_anchor_cell.x + d.x, _terrain_anchor_cell.y)
		else:
			target = Vector2i(_terrain_anchor_cell.x, _terrain_anchor_cell.y + d.y)
	_terrain_target_cell = target
	_drag_cells = _bresenham_cells(_terrain_anchor_cell, target)
	_refresh_terrain_ghosts()
	if _placement_overlay != null:
		if target != _terrain_anchor_cell:
			_placement_overlay.set_terrain_guide(_terrain_cell_center(_terrain_anchor_cell), _terrain_cell_center(target))
		else:
			_placement_overlay.clear_terrain_guide()


func _bresenham_cells(a: Vector2i, b: Vector2i) -> Array[Vector2i]:
	var cells: Array[Vector2i] = []
	var x0: int = a.x
	var y0: int = a.y
	var x1: int = b.x
	var y1: int = b.y
	var dx: int = absi(x1 - x0)
	var dy: int = -absi(y1 - y0)
	var sx: int = 1 if x0 < x1 else -1
	var sy: int = 1 if y0 < y1 else -1
	var err: int = dx + dy
	while true:
		cells.append(Vector2i(x0, y0))
		if x0 == x1 and y0 == y1:
			break
		var e2: int = 2 * err
		if e2 >= dy:
			err += dy
			x0 += sx
		if e2 <= dx:
			err += dx
			y0 += sy
	return cells


## Three-state classification per block cell: 1 empty, 2 same-type skip, 3
## conflicting. Uses the 16-px advisory dictionary as a broadphase and then does
## a precise interior-overlap test so blocks that tile edge-to-edge (Case A
## seamless extension) still classify empty while genuinely overlapping blocks
## skip. Cells stamped earlier in the current drag (in-drag self-overlap) read
## as same-type skip.
func _classify_cell(cell: Vector2i) -> int:
	if _drag_painted.has(cell):
		return 2
	var aabb := _block_aabb(cell)
	var seen: Dictionary = {}
	for c: Vector2i in _rasterize_aabb_to_cells(aabb):
		for n in _grid_cells.get(c, []):
			if n is Node2D:
				seen[(n as Node2D).get_instance_id()] = n
	var has_same := false
	for n in seen.values():
		var node := n as Node2D
		if node == null:
			continue
		if not _aabb_overlaps(aabb, STAGE_SELECTION.get_world_aabb(node)):
			continue
		if node is TerrainBlock and (node as TerrainBlock).spawn_id == _placement_id:
			has_same = true
			continue
		return 3
	return 2 if has_same else 1


## Strict interior overlap (excludes edge/corner contact) so blocks that tile
## edge-to-edge do not register as overlapping.
func _aabb_overlaps(a: Rect2, b: Rect2) -> bool:
	return a.position.x < b.end.x and b.position.x < a.end.x \
		and a.position.y < b.end.y and b.position.y < a.end.y


func _refresh_terrain_ghosts() -> void:
	if _drag_cells == _last_drag_cells:
		return
	_last_drag_cells = _drag_cells.duplicate()
	_free_terrain_ghosts()
	if _placement_id == "" or not _is_terrain_placement():
		return
	for cell: Vector2i in _drag_cells:
		var state := _classify_cell(cell)
		var ghost := _spawner.spawn(_placement_id, _terrain_cell_center(cell))
		if ghost == null:
			continue
		if ghost.get_parent() == _world:
			_world.remove_child(ghost)
		_ghost_holder.add_child(ghost)
		_configure_ghost_collision(ghost)
		match state:
			1:
				ghost.modulate = Color(0.3, 1.0, 0.4, 0.5)
			2:
				ghost.modulate = Color(1.0, 1.0, 1.0, 0.15)
			3:
				ghost.modulate = Color(1.0, 0.3, 0.3, 0.5)
		_ghost_array.append(ghost)


func _free_terrain_ghosts() -> void:
	for g: Node2D in _ghost_array:
		if g != null and is_instance_valid(g):
			g.queue_free()
	_ghost_array.clear()


func _commit_terrain_drag() -> void:
	var placed: Array[Node2D] = []
	for cell: Vector2i in _drag_cells:
		if _classify_cell(cell) != 1:
			continue
		var node := _spawner.spawn(_placement_id, _terrain_cell_center(cell))
		if node == null:
			continue
		_finalize_placed_node(node)
		object_placed.emit(node)
		placed.append(node)
		_drag_painted[cell] = true
	if not placed.is_empty():
		_nav_dirty = true
		_rebuild_grid_cells()
	_end_terrain_drag()
	_refresh_status()


func _cancel_terrain_drag() -> void:
	_end_terrain_drag()


func _end_terrain_drag() -> void:
	_terrain_dragging = false
	_drag_cells.clear()
	_last_drag_cells.clear()
	_drag_painted.clear()
	_free_terrain_ghosts()
	if _placement_overlay != null:
		_placement_overlay.clear_terrain_guide()
	# Re-arm the single cursor-following ghost (LMB repeated placement) unless
	# the tool was just put away (placement_id cleared).
	if _placement_id != "":
		_spawn_ghost()

# ---------------------------------------------------------------------------
# Grid spatial dictionary (Phase 4b) — advisory only, never authoritative.
# ---------------------------------------------------------------------------

func _rasterize_aabb_to_cells(aabb: Rect2) -> Array[Vector2i]:
	var cells: Array[Vector2i] = []
	if aabb.size.x <= 0.0 or aabb.size.y <= 0.0:
		return cells
	var gs := STAGE_SPAWNER.TERRAIN_GRID_SIZE
	var min_x := int(floorf(aabb.position.x / gs))
	var max_x := int(floorf((aabb.end.x - 0.0001) / gs))
	var min_y := int(floorf(aabb.position.y / gs))
	var max_y := int(floorf((aabb.end.y - 0.0001) / gs))
	for y: int in range(min_y, max_y + 1):
		for x: int in range(min_x, max_x + 1):
			cells.append(Vector2i(x, y))
	return cells


func _rebuild_grid_cells() -> void:
	_grid_cells.clear()
	for node: Node2D in _world_children_selectable():
		_add_node_to_grid_cells(node)


func _add_node_to_grid_cells(node: Node2D) -> void:
	if node == null or not is_instance_valid(node) or node.is_queued_for_deletion():
		return
	var aabb := STAGE_SELECTION.get_world_aabb(node)
	for cell: Vector2i in _rasterize_aabb_to_cells(aabb):
		var list: Array = _grid_cells.get(cell, [])
		if not list.has(node):
			list.append(node)
		_grid_cells[cell] = list

# ---------------------------------------------------------------------------
# Selection
# ---------------------------------------------------------------------------

func _begin_click_select(world_pos: Vector2, shift: bool) -> void:
	var hit := _selection.hit_test(world_pos)
	if hit != null:
		if shift:
			_selection.toggle_selection(hit)
			if _selection.is_selected(hit):
				_gizmos.begin_translate_drag(hit, world_pos)
		elif _selection.is_selected(hit):
			# Already selected: keep the whole selection and drag it together.
			_gizmos.begin_translate_drag(hit, world_pos)
		else:
			_selection.select_only(hit)
			_gizmos.begin_translate_drag(hit, world_pos)
	else:
		_box_selecting = true
		_box_start = world_pos
		_box_rect = Rect2(world_pos, Vector2.ZERO)
		_gizmos.set_box_rect(_box_rect)


func _finish_box_select(shift: bool) -> void:
	_box_selecting = false
	_gizmos.set_box_rect(Rect2())
	var rect := _box_rect.abs()
	if rect.get_area() < MIN_BOX_AREA:
		if not shift:
			_selection.clear_selection()
	else:
		_selection.box_select(rect, shift)

# ---------------------------------------------------------------------------
# Deletion
# ---------------------------------------------------------------------------

func delete_selected() -> void:
	var selected := _selection.get_selected().duplicate()
	if selected.is_empty():
		return
	var nav_changed := false
	for node: Node2D in selected:
		if is_instance_valid(node):
			if node is TerrainBlock:
				nav_changed = true
			_clear_object_state(node)
			node.queue_free()
	_rebuild_grid_cells()
	_cleanup_rules_for_nodes(selected)
	_selection.clear_selection()
	_selection.clear_hover()
	if nav_changed:
		_nav_dirty = true
	_director_visuals.mark_dirty()
	object_deleted.emit(selected)
	_refresh_status()

# ---------------------------------------------------------------------------
# Status / UI
# ---------------------------------------------------------------------------

func _refresh_status() -> void:
	if _status_label == null:
		return
	var count := _world_children_selectable().size()
	var sel := _selection.get_selected()
	var sel_text: String
	if sel.is_empty():
		sel_text = "none"
	elif sel.size() == 1:
		sel_text = String(sel[0].name)
	else:
		sel_text = "%d objects" % sel.size()
	var text := "Objects: %d | Selected: %s" % [count, sel_text]
	if _pending_walk_target:
		text += "  |  Click stage for walk target (Esc to cancel)"
	if _rule_step != RuleStep.IDLE and not _rule_hint.is_empty():
		text += "  |  " + _rule_hint
	if not _toast_text.is_empty():
		text = _toast_text + "  |  " + text
	_status_label.text = text


func _accent_for_mode(mode: StageMode) -> Color:
	match mode:
		StageMode.DIRECT:
			return _accent_direct
		StageMode.PLAY:
			return _accent_play
		_:
			return _accent_edit


func _sync_mode_buttons() -> void:
	var accent := _accent_for_mode(current_mode)
	for id: int in _mode_buttons:
		var btn: Button = _mode_buttons[id]
		var active := int(current_mode) == id
		btn.set_pressed_no_signal(active)
		if active:
			btn.add_theme_color_override("font_color", accent)
			btn.add_theme_color_override("font_pressed_color", accent)
			btn.add_theme_color_override("font_hover_color", accent)
		else:
			btn.remove_theme_color_override("font_color")
			btn.remove_theme_color_override("font_pressed_color")
			btn.remove_theme_color_override("font_hover_color")


func _apply_mode_frame() -> void:
	if _mode_frame == null:
		return
	_mode_frame.visible = current_mode == StageMode.DIRECT
	var sb: StyleBoxFlat = _mode_frame.get_theme_stylebox("panel")
	sb.border_color = _accent_for_mode(current_mode)


func _refresh_mode_badge() -> void:
	if _mode_badge == null or _mode_badge_label == null:
		return
	var accent := _accent_for_mode(current_mode)
	var text := "✏️ EDIT"
	match current_mode:
		StageMode.EDIT:
			text = "✏️ EDIT"
		StageMode.DIRECT:
			text = "🎬 DIRECTING"
		StageMode.PLAY:
			text = "▶️ SIMULATING"
	_mode_badge_label.text = text
	var sb: StyleBoxFlat = _mode_badge.get_theme_stylebox("panel")
	sb.bg_color = accent
	var text_color := Color.BLACK if accent.get_luminance() > 0.5 else Color.WHITE
	_mode_badge_label.add_theme_color_override("font_color", text_color)
	_mode_badge.size = _mode_badge.get_combined_minimum_size()


func _apply_cursor() -> void:
	_last_awaiting_click = _is_awaiting_click()
	if _last_awaiting_click:
		_apply_action_cursor()
		return
	Input.set_custom_mouse_cursor(null)
	match current_mode:
		StageMode.PLAY:
			Input.set_default_cursor_shape(Input.CURSOR_ARROW)
		_:
			Input.set_default_cursor_shape(Input.CURSOR_CROSS)


func _apply_action_cursor() -> void:
	if _action_cursor == null:
		return
	var hotspot := Vector2(_action_cursor.get_width() * 0.5, _action_cursor.get_height() * 0.5)
	Input.set_custom_mouse_cursor(_action_cursor, Input.CURSOR_ARROW, hotspot)


func _build_action_cursor() -> void:
	var size := 24
	var img := Image.create(size, size, false, Image.FORMAT_RGBA8)
	img.fill(Color(0.0, 0.0, 0.0, 0.0))
	var color := Color(1.0, 0.7, 0.1, 1.0)
	var center := Vector2(size, size) * 0.5
	var radius := float(size) * 0.4
	for y: int in size:
		for x: int in size:
			var p := Vector2(x, y) + Vector2(0.5, 0.5)
			var d := p.distance_to(center)
			if absf(d - radius) <= 1.5:
				img.set_pixel(x, y, color)
			if absf(p.x - center.x) <= 1.0 and p.y >= center.y - radius and p.y <= center.y + radius:
				img.set_pixel(x, y, color)
			if absf(p.y - center.y) <= 1.0 and p.x >= center.x - radius and p.x <= center.x + radius:
				img.set_pixel(x, y, color)
	_action_cursor = ImageTexture.create_from_image(img)


func _apply_popup_theme(popup: PopupMenu) -> void:
	popup.add_theme_font_size_override("font_size", _action_popup_font_size)
	if _emoji_font != null:
		popup.add_theme_font_override("font", _emoji_font)


func _apply_ui_font(control: Control) -> void:
	if control != null and _ui_font != null:
		control.add_theme_font_override("font", _ui_font)


func _update_cursor_coords() -> void:
	if _status_cursor_coords == null:
		return
	if _camera == null or not is_instance_valid(_camera):
		return
	var world_pos := _camera.get_global_mouse_position()
	_status_cursor_coords.text = "X: %d  Y: %d" % [int(round(world_pos.x)), int(round(world_pos.y))]


func _sync_awaiting_cursor() -> void:
	if _is_awaiting_click() != _last_awaiting_click:
		_apply_cursor()


func _build_ui() -> void:
	var ui := CanvasLayer.new()
	ui.name = "UI"
	add_child(ui)

	# Mode frame (over the viewport, behind the top bar; amber border in DIRECT).
	_mode_frame = Panel.new()
	_mode_frame.name = "ModeFrame"
	_mode_frame.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_mode_frame.set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)
	var frame_style := StyleBoxFlat.new()
	frame_style.bg_color = Color(0.0, 0.0, 0.0, 0.0)
	frame_style.border_color = _accent_direct
	frame_style.set_border_width_all(3)
	_mode_frame.add_theme_stylebox_override("panel", frame_style)
	ui.add_child(_mode_frame)

	var top_bar := PanelContainer.new()
	top_bar.set_anchors_and_offsets_preset(Control.PRESET_TOP_WIDE)
	top_bar.offset_bottom = 40.0
	ui.add_child(top_bar)

	var hbox := HBoxContainer.new()
	hbox.add_theme_constant_override("separation", 8)
	top_bar.add_child(hbox)

	# 3-segment mode switcher.
	var mode_defs: Array = [
		[StageMode.EDIT, "✏️ Edit"],
		[StageMode.DIRECT, "🎬 Direct"],
		[StageMode.PLAY, "▶️ Play"],
	]
	for def: Array in mode_defs:
		var mid: StageMode = def[0]
		var btn := Button.new()
		btn.text = String(def[1])
		btn.toggle_mode = true
		btn.toggled.connect(_on_mode_segment_toggled.bind(mid))
		hbox.add_child(btn)
		_mode_buttons[int(mid)] = btn

	for id: String in _spawner.get_spawnable_ids():
		var btn := Button.new()
		btn.text = _spawner.get_label(id)
		btn.toggle_mode = true
		btn.toggled.connect(_on_palette_toggled.bind(id))
		hbox.add_child(btn)
		_palette_buttons[id] = btn

	_direct_hint_label = Label.new()
	_direct_hint_label.text = "Click a stickman to direct, or ⚡ When… for rules"
	_direct_hint_label.visible = false
	_apply_ui_font(_direct_hint_label)
	hbox.add_child(_direct_hint_label)

	_grid_check = CheckBox.new()
	_grid_check.text = "Grid"
	_grid_check.button_pressed = _show_grid
	_grid_check.toggled.connect(_on_grid_toggled)
	hbox.add_child(_grid_check)

	_snap_check = CheckBox.new()
	_snap_check.text = "Snap"
	_snap_check.button_pressed = _snap_enabled
	_snap_check.toggled.connect(_on_snap_toggled)
	hbox.add_child(_snap_check)

	_grid_size_label = Label.new()
	_grid_size_label.text = "Size"
	hbox.add_child(_grid_size_label)

	_grid_size_spin = SpinBox.new()
	_grid_size_spin.min_value = MIN_GRID_SIZE
	_grid_size_spin.max_value = MAX_GRID_SIZE
	_grid_size_spin.step = 1.0
	_grid_size_spin.value = _grid_size
	_grid_size_spin.rounded = true
	_grid_size_spin.value_changed.connect(_on_grid_size_changed)
	hbox.add_child(_grid_size_spin)

	# Bottom status bar (left = status, right = cursor world coords).
	var bottom_bar := PanelContainer.new()
	bottom_bar.set_anchors_and_offsets_preset(Control.PRESET_BOTTOM_WIDE)
	bottom_bar.offset_top = -28.0
	ui.add_child(bottom_bar)

	var status_hbox := HBoxContainer.new()
	status_hbox.add_theme_constant_override("separation", 12)
	bottom_bar.add_child(status_hbox)

	_status_label = Label.new()
	_status_label.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	_apply_ui_font(_status_label)
	status_hbox.add_child(_status_label)

	_status_cursor_coords = Label.new()
	_apply_ui_font(_status_cursor_coords)
	status_hbox.add_child(_status_cursor_coords)

	# Mode badge pill (top-left, below the top bar).
	_mode_badge = PanelContainer.new()
	_mode_badge.name = "ModeBadge"
	_mode_badge.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_mode_badge.set_anchors_and_offsets_preset(Control.PRESET_TOP_LEFT)
	_mode_badge.offset_top = 48.0
	_mode_badge.offset_left = 8.0
	var badge_style := StyleBoxFlat.new()
	badge_style.bg_color = _accent_edit
	badge_style.set_corner_radius_all(12)
	badge_style.content_margin_left = 12.0
	badge_style.content_margin_right = 12.0
	badge_style.content_margin_top = 4.0
	badge_style.content_margin_bottom = 4.0
	_mode_badge.add_theme_stylebox_override("panel", badge_style)
	_mode_badge_label = Label.new()
	_mode_badge_label.add_theme_font_size_override("font_size", _status_pill_font_size)
	_apply_ui_font(_mode_badge_label)
	_mode_badge.add_child(_mode_badge_label)
	ui.add_child(_mode_badge)

	# Action tooltip (cursor-attached, hidden unless a click-awaiting step is active).
	_tooltip = Label.new()
	_tooltip.name = "ActionTooltip"
	_tooltip.visible = false
	_tooltip.mouse_filter = Control.MOUSE_FILTER_IGNORE
	var tooltip_style := StyleBoxFlat.new()
	tooltip_style.bg_color = Color(0.1, 0.1, 0.1, 0.9)
	tooltip_style.border_color = _accent_direct
	tooltip_style.set_border_width_all(1)
	tooltip_style.set_corner_radius_all(8)
	tooltip_style.content_margin_left = 10.0
	tooltip_style.content_margin_right = 10.0
	tooltip_style.content_margin_top = 4.0
	tooltip_style.content_margin_bottom = 4.0
	_tooltip.add_theme_stylebox_override("normal", tooltip_style)
	_tooltip.add_theme_font_size_override("font_size", _tooltip_font_size)
	_tooltip.add_theme_color_override("font_color", Color.WHITE)
	_apply_ui_font(_tooltip)
	ui.add_child(_tooltip)

	_action_popup = PopupMenu.new()
	_action_popup.add_item("🚶 Walk To", ACT_WALK)
	_action_popup.add_item("💬 Speak", ACT_SPEAK)
	_action_popup.add_item("⏳ Wait", ACT_WAIT)
	_action_popup.add_item("💥 Ragdoll", ACT_RAGDOLL)
	_action_popup.add_item("🔄 Recover", ACT_RECOVER)
	_action_popup.add_separator()
	_action_popup.add_item("⚡ When...", ACT_WHEN)
	_action_popup.id_pressed.connect(_on_action_popup_id_pressed)
	ui.add_child(_action_popup)

	_trigger_popup = PopupMenu.new()
	_trigger_popup.add_item("📍 Arrives at a waypoint", TRIG_ARRIVED)
	_trigger_popup.add_item("✅ Completes any action", TRIG_ACTION_FINISHED)
	_trigger_popup.add_item("💬 Finishes speaking", TRIG_SPEECH_FINISHED)
	_trigger_popup.add_item("🎯 Enters trigger area", TRIG_ENTERED_AREA)
	_trigger_popup.add_item("💥 Collides with something", TRIG_COLLIDED)
	_trigger_popup.add_separator()
	_trigger_popup.add_item("⬅ Back to actions", TRIG_BACK)
	_trigger_popup.id_pressed.connect(_on_trigger_popup_id_pressed)
	ui.add_child(_trigger_popup)

	_rule_action_popup = PopupMenu.new()
	_rule_action_popup.add_item("🚶 Walk To", ACT_WALK)
	_rule_action_popup.add_item("💬 Speak", ACT_SPEAK)
	_rule_action_popup.add_item("⏳ Wait", ACT_WAIT)
	_rule_action_popup.add_item("💥 Ragdoll", ACT_RAGDOLL)
	_rule_action_popup.add_item("🔄 Recover", ACT_RECOVER)
	_rule_action_popup.id_pressed.connect(_on_rule_action_popup_id_pressed)
	ui.add_child(_rule_action_popup)

	_rule_more_popup = PopupMenu.new()
	_rule_more_popup.add_item("➕ Add another action", RULE_MORE_ADD)
	_rule_more_popup.add_item("✅ Done", RULE_MORE_DONE)
	_rule_more_popup.id_pressed.connect(_on_rule_more_id_pressed)
	ui.add_child(_rule_more_popup)

	_speak_dialog = AcceptDialog.new()
	_speak_dialog.title = "Speak"
	_speak_dialog.confirmed.connect(_on_speak_confirmed)
	_speak_edit = LineEdit.new()
	_speak_edit.placeholder_text = "Say something…"
	_speak_edit.custom_minimum_size = Vector2(240.0, 0.0)
	_speak_dialog.add_child(_speak_edit)
	_speak_dialog.register_text_enter(_speak_edit)
	ui.add_child(_speak_dialog)

	_wait_dialog = AcceptDialog.new()
	_wait_dialog.title = "Wait"
	_wait_dialog.confirmed.connect(_on_wait_confirmed)
	_wait_spin = SpinBox.new()
	_wait_spin.min_value = 0.1
	_wait_spin.max_value = 10.0
	_wait_spin.step = 0.1
	_wait_spin.value = 1.0
	_wait_dialog.add_child(_wait_spin)
	ui.add_child(_wait_dialog)

	_apply_popup_theme(_action_popup)
	_apply_popup_theme(_trigger_popup)
	_apply_popup_theme(_rule_action_popup)
	_apply_popup_theme(_rule_more_popup)

	_selector_dim = ColorRect.new()
	_selector_dim.name = "SelectorDim"
	_selector_dim.color = Color(0.0, 0.0, 0.0, SELECTOR_DIM_ALPHA)
	_selector_dim.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_selector_dim.set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)
	_selector_dim.visible = false
	ui.add_child(_selector_dim)

	_selector = ASSET_SELECTOR.instantiate() as AssetSelector
	_selector.item_selected.connect(_on_asset_selected)
	_selector.cancelled.connect(_on_selector_cancelled)
	_selector.popup_hide.connect(_on_selector_cancelled)
	_selector.browse_requested.connect(_on_browse_requested)
	_selector.refresh_requested.connect(_on_refresh_requested)
	ui.add_child(_selector)
	# apply_font AFTER add_child so the selector's @onready nodes resolve first.
	_selector.apply_font(_ui_font, _emoji_font)

	_browse_dialog = FileDialog.new()
	_browse_dialog.title = "Open .stk"
	_browse_dialog.access = FileDialog.ACCESS_FILESYSTEM
	_browse_dialog.file_mode = FileDialog.FILE_MODE_OPEN_FILE
	_browse_dialog.filters = PackedStringArray(["*.stk ; Stickman Files"])
	_browse_dialog.file_selected.connect(_on_browse_file_selected)
	ui.add_child(_browse_dialog)


func _build_gizmo_layer() -> void:
	_gizmos = STAGE_GIZMOS.new()
	_gizmos.name = "GizmoLayer"
	_gizmos.camera = _camera
	_gizmos.transform_committed.connect(_on_transform_committed)
	add_child(_gizmos)


func _build_grid_layer() -> void:
	_grid = STAGE_GRID.new()
	_grid.name = "GridLayer"
	_grid.camera = _camera
	add_child(_grid)
	move_child(_grid, 0)


func _build_ghost_holder() -> void:
	_ghost_holder = Node2D.new()
	_ghost_holder.name = "PlacementGhost"
	add_child(_ghost_holder)


func _build_placement_overlay() -> void:
	_placement_overlay = STAGE_PLACEMENT_OVERLAY.new()
	_placement_overlay.name = "PlacementOverlay"
	_placement_overlay.camera = _camera
	add_child(_placement_overlay)


func _build_director_visuals() -> void:
	_director_visuals = STAGE_DIRECTOR_VISUALS.new()
	_director_visuals.name = "DirectorVisualsLayer"
	_director_visuals.camera = _camera
	_director_visuals.world = _world
	add_child(_director_visuals)


## Code-built NavigationRegion2D child of the stage (NOT World, so it is never
## selected/hit-tested). Sits at the stage origin; World is at identity so world
## coordinates equal region-local coordinates.
func _build_navigation() -> void:
	_nav_region = NavigationRegion2D.new()
	_nav_region.name = "NavigationRegion2D"
	add_child(_nav_region)
	_rebake_navigation()


## Rebuild the navigation mesh from every TerrainBlock child of World: each
## block's world-space polygon is convex-decomposed and fan-triangulated into
## one manual NavigationPolygon.
func _rebake_navigation() -> void:
	if _nav_region == null or not is_instance_valid(_nav_region):
		return
	var verts := PackedVector2Array()
	var triangles: Array[PackedInt32Array] = []
	for child: Node in _world.get_children():
		var block := child as TerrainBlock
		if block == null:
			continue
		var pts := PackedVector2Array()
		for p: Vector2 in block.polygon_points:
			pts.append(block.transform * p)
		var pieces := Geometry2D.decompose_polygon_in_convex(pts)
		if pieces.is_empty():
			pieces = [pts]
		for piece: PackedVector2Array in pieces:
			var base: int = verts.size()
			verts.append_array(piece)
			for i: int in range(1, piece.size() - 1):
				triangles.append(PackedInt32Array([base, base + i, base + i + 1]))
	var poly := NavigationPolygon.new()
	poly.set_vertices(verts)
	for tri: PackedInt32Array in triangles:
		poly.add_polygon(tri)
	_nav_region.navigation_polygon = poly
	if DEBUG_STAGE:
		print("[nav] baked verts=%d polys=%d" % [verts.size(), triangles.size()])

# ---------------------------------------------------------------------------
# Signal handlers
# ---------------------------------------------------------------------------

func _on_mode_segment_toggled(pressed: bool, mode: StageMode) -> void:
	if pressed:
		set_mode(mode)
	else:
		if current_mode == mode:
			(_mode_buttons[int(mode)] as Button).set_pressed_no_signal(true)


func _on_palette_toggled(pressed: bool, id: String) -> void:
	if pressed:
		if id == "stickman" or id == "prop":
			_open_selector(id)
			return
		set_placement_mode(id)
	else:
		if _selector_open and _selector_kind == id:
			_close_selector()
		elif _placement_id == id:
			set_placement_mode("")


func _open_selector(kind: String) -> void:
	for pid: String in _palette_buttons:
		(_palette_buttons[pid] as Button).set_pressed_no_signal(pid == kind)
	_selector_kind = kind
	var entries: Array[Dictionary]
	if kind == "stickman":
		entries = _stickman_library.scan()
		if not entries.is_empty() and _stickman_library.find_by_path(_spawner.get_selected_stickman_path()).is_empty():
			_spawner.selected_stickman_path = String(entries[0]["path"])
	else:
		entries = PROP_LIBRARY.get_entries()
	if kind == "stickman" and entries.size() == 1:
		_on_asset_selected(entries[0])
		return
	_selector_open = true
	if _selector_dim != null:
		_selector_dim.visible = true
	_selector.open(kind, entries)
	_load_or_enqueue_thumbnails(kind, entries)


func _on_asset_selected(entry: Dictionary) -> void:
	var kind := _selector_kind
	if kind == "stickman":
		_spawner.selected_stickman_path = String(entry.get("path", ""))
	else:
		_spawner.selected_prop_id = String(entry.get("id", ""))
	_close_selector()
	set_placement_mode(kind)


func _close_selector() -> void:
	_selector_open = false
	_selector_kind = ""
	_thumbnail_queue.clear()
	if _selector_dim != null:
		_selector_dim.visible = false
	if _selector != null:
		_selector.hide()


func _on_selector_cancelled() -> void:
	if not _selector_open:
		return
	_close_selector()
	set_placement_mode("")


func _on_browse_requested() -> void:
	if _browse_dialog != null:
		_browse_dialog.popup_centered()


func _on_browse_file_selected(path: String) -> void:
	var entry := _stickman_library.make_entry(path)
	if entry.is_empty():
		_show_toast("Could not load stickman: " + path)
		return
	_on_asset_selected(entry)


func _on_refresh_requested() -> void:
	var entries: Array[Dictionary] = _stickman_library.scan()
	if not entries.is_empty() and _stickman_library.find_by_path(_spawner.get_selected_stickman_path()).is_empty():
		_spawner.selected_stickman_path = String(entries[0]["path"])
	_selector.set_entries(entries)
	_load_or_enqueue_thumbnails("stickman", entries)


func _load_or_enqueue_thumbnails(kind: String, entries: Array[Dictionary]) -> void:
	_thumbnail_queue.clear()
	for entry: Dictionary in entries:
		if kind == "stickman":
			var path := String(entry.get("path", ""))
			var key := _thumbnail_cache.stickman_key(path)
			var png := _thumbnail_cache.stickman_png(key)
			if FileAccess.file_exists(png):
				var tex := _thumbnail_cache.load_png(png)
				if tex != null and _selector != null:
					_selector.set_thumbnail(entry, tex)
			else:
				_thumbnail_queue.append({ "kind": kind, "entry": entry, "key": key })
		else:
			var id := String(entry.get("id", ""))
			var png := _thumbnail_cache.prop_png(id)
			if FileAccess.file_exists(png):
				var tex := _thumbnail_cache.load_png(png)
				if tex != null and _selector != null:
					_selector.set_thumbnail(entry, tex)
			else:
				_thumbnail_queue.append({ "kind": kind, "entry": entry })


func _drain_thumbnail_queue() -> void:
	if _thumbnail_busy or _thumbnail_queue.is_empty():
		return
	_thumbnail_busy = true
	var job: Dictionary = _thumbnail_queue.pop_front()
	var kind := String(job["kind"])
	var entry: Dictionary = job["entry"]
	var tex: Texture2D = null
	if kind == "stickman":
		var key := String(job["key"])
		var data: Dictionary = entry["data"]
		tex = await _stickman_thumb.render(data)
		if tex != null:
			_thumbnail_cache.save_png(tex, _thumbnail_cache.stickman_png(key))
	else:
		var payload: Dictionary = entry["payload"]
		var preset: int = int(entry["material_preset"])
		tex = await _prop_thumb.render(payload, preset)
		if tex != null:
			_thumbnail_cache.save_png(tex, _thumbnail_cache.prop_png(String(entry["id"])))
	_thumbnail_busy = false
	if _selector != null and _selector_open and tex != null:
		_selector.set_thumbnail(entry, tex)


func _on_grid_toggled(pressed: bool) -> void:
	_show_grid = pressed
	_apply_grid_settings()
	_save_settings()


func _on_snap_toggled(pressed: bool) -> void:
	_snap_enabled = pressed
	_apply_grid_settings()
	_save_settings()


func _on_grid_size_changed(value: float) -> void:
	_grid_size = clampf(value, MIN_GRID_SIZE, MAX_GRID_SIZE)
	_apply_grid_settings()
	_save_settings()


func _on_selection_changed(nodes: Array[Node2D]) -> void:
	_gizmos.set_targets(nodes)
	if nodes.is_empty():
		object_deselected.emit()
	else:
		object_selected.emit(nodes)
	_refresh_status()


func _on_hover_changed(node: Node2D) -> void:
	_gizmos.set_hover(node)


func _on_transform_committed(nodes: Array[Node2D]) -> void:
	for node: Node2D in nodes:
		_save_object_state(node)
		if node is TerrainBlock:
			_nav_dirty = true
	_rebuild_grid_cells()
	_director_visuals.mark_dirty()

# ---------------------------------------------------------------------------
# Director tool (Phase 3a)
# ---------------------------------------------------------------------------

func _handle_direct_click(world_pos: Vector2) -> void:
	if _pending_walk_target and _context_rig != null and is_instance_valid(_context_rig):
		_stage_dbg("walk_to captured target=(%.1f, %.1f)" % [world_pos.x, world_pos.y])
		_context_rig.queue_action({ "type": "walk_to", "target": world_pos })
		_pending_walk_target = false
		_context_rig = null
		_apply_cursor()
		_refresh_status()
		return
	var hit := _selection.hit_test(world_pos)
	if hit is STICKMAN_RIG:
		_context_rig = hit as StickmanRig
		var screen := _world_to_screen(hit.global_position)
		var rect := Rect2i(Vector2i(screen) + Vector2i(24, 0), Vector2i.ZERO)
		_set_popup_anchor(rect)
		_action_popup.popup(rect)


func _on_action_popup_id_pressed(id: int) -> void:
	if _context_rig == null or not is_instance_valid(_context_rig):
		return
	match id:
		ACT_WALK:
			_pending_walk_target = true
			_apply_cursor()
			_refresh_status()
		ACT_SPEAK:
			_speak_edit.text = ""
			_speak_dialog.popup_centered()
			_speak_edit.grab_focus()
		ACT_WAIT:
			_wait_spin.value = 1.0
			_wait_dialog.popup_centered()
		ACT_RAGDOLL:
			_context_rig.queue_action({ "type": "ragdoll" })
		ACT_RECOVER:
			_context_rig.queue_action({ "type": "recover" })
		ACT_WHEN:
			_rule_builder = {
				"trigger": { "source": _context_rig.get_instance_id(), "target": -1, "params": {} },
				"actions": [],
			}
			_rule_editing_id = -1
			_rule_context_rig = _context_rig
			_rule_step = RuleStep.SELECT_TRIGGER
			_trigger_popup.popup(_popup_anchor_rect())


# ---------------------------------------------------------------------------
# Director UX (Phase 4b): cursor-attached tooltip, trajectory, ghost marker
# ---------------------------------------------------------------------------

func _is_awaiting_click() -> bool:
	if _pending_walk_target:
		return true
	return _rule_step == RuleStep.TRIGGER_TARGET \
		or _rule_step == RuleStep.ACTION_TARGET \
		or _rule_step == RuleStep.ACTION_POSITION


func _action_hint_text() -> String:
	if _pending_walk_target:
		return "🚩 Click to set walk target"
	match _rule_step:
		RuleStep.TRIGGER_TARGET:
			var trigger: Dictionary = _rule_builder.get("trigger", {})
			match String(trigger.get("type", "")):
				"arrived_at_waypoint":
					return "📍 Click the waypoint"
				"entered_area":
					return "🎯 Click the trigger area"
				"collided":
					return "💥 Click the prop"
				_:
					return "🎯 Click the target"
		RuleStep.ACTION_TARGET:
			return "🎯 Click the stickman"
		RuleStep.ACTION_POSITION:
			return "🚩 Click where to walk"
	return ""


func _action_origin() -> Vector2:
	if _pending_walk_target:
		if _context_rig != null and is_instance_valid(_context_rig):
			return _context_rig.global_position - STICKMAN_RIG.FOOT_OFFSET
		return Vector2.ZERO
	if _rule_step != RuleStep.IDLE:
		if _rule_context_rig != null and is_instance_valid(_rule_context_rig):
			return _rule_context_rig.global_position - STICKMAN_RIG.FOOT_OFFSET
		var trigger: Dictionary = _rule_builder.get("trigger", {})
		var src := instance_from_id(int(trigger.get("source", -1)))
		if src is Node2D and is_instance_valid(src):
			return (src as Node2D).global_position
	return Vector2.ZERO


func _is_target_valid(pos: Vector2) -> bool:
	var cell := _world_to_grid_cell(pos)
	for n in _grid_cells.get(cell, []):
		if n is TerrainBlock and STAGE_SELECTION.get_world_aabb(n).has_point(pos):
			return false
	return true


func _update_action_overlay() -> void:
	var awaiting := _is_awaiting_click()
	if _placement_overlay != null:
		if awaiting:
			var origin := _action_origin()
			var target := _camera.get_global_mouse_position()
			if _snap_enabled and _rule_step == RuleStep.ACTION_POSITION:
				target = _snap_to_grid(target)
			_placement_overlay.set_action_trajectory(origin, target, _is_target_valid(target))
		else:
			_placement_overlay.clear_action()
	if _tooltip != null:
		_tooltip.visible = awaiting
		if awaiting:
			_tooltip.text = _action_hint_text()
			var sb: StyleBox = _tooltip.get_theme_stylebox("normal")
			var extra := sb.get_minimum_size() if sb != null else Vector2.ZERO
			_tooltip.size = _tooltip.get_minimum_size() + extra
			_update_tooltip_position()


func _update_tooltip_position() -> void:
	if _tooltip == null:
		return
	var mouse := get_viewport().get_mouse_position()
	var size := _tooltip.size
	var pos := mouse + Vector2(20.0, -20.0)
	var vp := get_viewport().get_visible_rect().size
	if pos.x + size.x > vp.x:
		pos.x = mouse.x - size.x - 20.0
	if pos.y + size.y > vp.y:
		pos.y = mouse.y - size.y - 20.0
	if pos.y < 0.0:
		pos.y = mouse.y + 20.0
	_tooltip.position = pos


func _on_speak_confirmed() -> void:
	if _rule_step == RuleStep.PARAMS:
		_set_rule_action_params({ "text": _speak_edit.text, "duration": 2.0 })
		_open_rule_more_popup()
		return
	if _context_rig == null or not is_instance_valid(_context_rig):
		return
	_context_rig.queue_action({ "type": "speak", "text": _speak_edit.text, "duration": 2.0 })


func _on_wait_confirmed() -> void:
	if _rule_step == RuleStep.PARAMS:
		_set_rule_action_params({ "duration": _wait_spin.value })
		_open_rule_more_popup()
		return
	if _context_rig == null or not is_instance_valid(_context_rig):
		return
	_context_rig.queue_action({ "type": "wait", "duration": _wait_spin.value })

# ---------------------------------------------------------------------------
# Rule / event system (Phase 4)
# ---------------------------------------------------------------------------

## Popup rect at the current mouse position.
func _mouse_popup_rect() -> Rect2i:
	var mouse := get_viewport().get_mouse_position()
	return Rect2i(Vector2i(mouse), Vector2i.ZERO)


## Records the session popup anchor (the first context menu's screen rect).
func _set_popup_anchor(rect: Rect2i) -> void:
	_popup_anchor = rect
	_popup_anchor_set = true


## Clears the session popup anchor (on rule confirm or cancel).
func _clear_popup_anchor() -> void:
	_popup_anchor = Rect2i()
	_popup_anchor_set = false


## Returns the session anchor, recording it from the mouse on first use so a
## rule-builder flow that never passed through a first menu still has one.
func _popup_anchor_rect() -> Rect2i:
	if not _popup_anchor_set:
		_set_popup_anchor(_mouse_popup_rect())
	return _popup_anchor


func _open_rule_action_popup() -> void:
	_sync_rule_action_done_item()
	_rule_action_popup.popup(_popup_anchor_rect())


## Shows the "✅ Done" item in the rule-action popup only while editing an
## existing rule (otherwise there is no way to save without adding an action).
func _sync_rule_action_done_item() -> void:
	var idx: int = _rule_action_popup.get_item_index(RULE_ACTION_DONE)
	var editing: bool = _rule_editing_id >= 0
	if editing and idx < 0:
		_rule_action_popup.add_item("✅ Done", RULE_ACTION_DONE)
	elif not editing and idx >= 0:
		_rule_action_popup.remove_item(idx)


func _open_rule_more_popup() -> void:
	_rule_more_popup.popup(_popup_anchor_rect())


func _on_trigger_popup_id_pressed(id: int) -> void:
	if id == TRIG_BACK:
		_reset_rule_builder()
		if _context_rig != null and is_instance_valid(_context_rig):
			_action_popup.popup(_popup_anchor_rect())
		_refresh_status()
		return
	var trigger: Dictionary = _rule_builder.get("trigger", {})
	trigger["type"] = _trigger_type_string(id)
	_rule_builder["trigger"] = trigger
	if id == TRIG_ARRIVED or id == TRIG_ENTERED_AREA or id == TRIG_COLLIDED:
		_rule_step = RuleStep.TRIGGER_TARGET
		match id:
			TRIG_ARRIVED:
				_rule_hint = "Click the waypoint to trigger on (Esc to cancel)"
			TRIG_ENTERED_AREA:
				_rule_hint = "Click the trigger area to watch (Esc to cancel)"
			TRIG_COLLIDED:
				_rule_hint = "Click the prop that will be collided with (Esc to cancel)"
		_refresh_status()
	else:
		_rule_step = RuleStep.SELECT_ACTION
		_open_rule_action_popup()


func _on_rule_action_popup_id_pressed(id: int) -> void:
	if id == RULE_ACTION_DONE:
		_finalize_rule()
		return
	var action := { "type": _action_type_string(id), "target": -1, "params": {} }
	var actions: Array = _rule_builder.get("actions", [])
	actions.append(action)
	_rule_builder["actions"] = actions
	_rule_step = RuleStep.ACTION_TARGET
	_rule_hint = "Click the stickman who will %s (Esc to cancel)" % _action_verb(id)
	_refresh_status()


func _on_rule_more_id_pressed(id: int) -> void:
	match id:
		RULE_MORE_ADD:
			_rule_step = RuleStep.SELECT_ACTION
			_open_rule_action_popup()
		RULE_MORE_DONE:
			_finalize_rule()


func _trigger_type_string(id: int) -> String:
	match id:
		TRIG_ARRIVED:
			return "arrived_at_waypoint"
		TRIG_ACTION_FINISHED:
			return "action_finished"
		TRIG_SPEECH_FINISHED:
			return "speech_finished"
		TRIG_ENTERED_AREA:
			return "entered_area"
		TRIG_COLLIDED:
			return "collided"
		_:
			return ""


func _action_type_string(id: int) -> String:
	match id:
		ACT_WALK:
			return "walk_to"
		ACT_SPEAK:
			return "speak"
		ACT_WAIT:
			return "wait"
		ACT_RAGDOLL:
			return "ragdoll"
		ACT_RECOVER:
			return "recover"
		_:
			return ""


func _action_verb(id: int) -> String:
	match id:
		ACT_WALK:
			return "walk"
		ACT_SPEAK:
			return "speak"
		ACT_WAIT:
			return "wait"
		ACT_RAGDOLL:
			return "ragdoll"
		ACT_RECOVER:
			return "recover"
		_:
			return "act"


func _handle_rule_click(world_pos: Vector2) -> void:
	match _rule_step:
		RuleStep.TRIGGER_TARGET:
			_handle_trigger_target_click(world_pos)
		RuleStep.ACTION_TARGET:
			_handle_action_target_click(world_pos)
		RuleStep.ACTION_POSITION:
			_handle_action_position_click(world_pos)


func _handle_trigger_target_click(world_pos: Vector2) -> void:
	var trigger: Dictionary = _rule_builder.get("trigger", {})
	match String(trigger.get("type", "")):
		"arrived_at_waypoint":
			var wp: Vector2 = _director_visuals.hit_test_waypoint(world_pos)
			if wp.is_finite():
				trigger["params"] = { "waypoint_pos": wp }
				trigger["target"] = -1
				_rule_builder["trigger"] = trigger
				_rule_step = RuleStep.SELECT_ACTION
				_open_rule_action_popup()
			else:
				_rule_hint = "Click a waypoint dot (Esc to cancel)"
				_refresh_status()
		"entered_area":
			var hit := _selection.hit_test(world_pos)
			if hit is TriggerArea:
				trigger["target"] = hit.get_instance_id()
				_rule_builder["trigger"] = trigger
				_rule_step = RuleStep.SELECT_ACTION
				_open_rule_action_popup()
			else:
				_rule_hint = "Click a trigger area (Esc to cancel)"
				_refresh_status()
		"collided":
			var hit2 := _selection.hit_test(world_pos)
			if hit2 is PropBlock:
				trigger["target"] = hit2.get_instance_id()
				_rule_builder["trigger"] = trigger
				_rule_step = RuleStep.SELECT_ACTION
				_open_rule_action_popup()
			else:
				_rule_hint = "Click the prop that will be collided with (Esc to cancel)"
				_refresh_status()


func _handle_action_target_click(world_pos: Vector2) -> void:
	var hit := _selection.hit_test(world_pos)
	if not (hit is STICKMAN_RIG):
		_refresh_status()
		return
	var actions: Array = _rule_builder.get("actions", [])
	if actions.is_empty():
		return
	var action: Dictionary = actions[actions.size() - 1]
	action["target"] = (hit as StickmanRig).get_instance_id()
	actions[actions.size() - 1] = action
	_rule_builder["actions"] = actions
	match String(action.get("type", "")):
		"walk_to":
			_rule_step = RuleStep.ACTION_POSITION
			_rule_hint = "Click where %s should walk (Esc to cancel)" % String(hit.name)
			_refresh_status()
		"speak":
			_rule_step = RuleStep.PARAMS
			_speak_edit.text = ""
			_speak_dialog.popup_centered()
			_speak_edit.grab_focus()
		"wait":
			_rule_step = RuleStep.PARAMS
			_wait_spin.value = 1.0
			_wait_dialog.popup_centered()
		_:
			# ragdoll / recover need no params.
			_open_rule_more_popup()


func _handle_action_position_click(world_pos: Vector2) -> void:
	if _snap_enabled:
		world_pos = _snap_to_grid(world_pos)
	var actions: Array = _rule_builder.get("actions", [])
	if actions.is_empty():
		return
	var action: Dictionary = actions[actions.size() - 1]
	var params: Dictionary = action.get("params", {})
	params["target"] = world_pos
	action["params"] = params
	actions[actions.size() - 1] = action
	_rule_builder["actions"] = actions
	_open_rule_more_popup()


## Writes dialog-confirmed params onto the last action in the builder.
func _set_rule_action_params(params: Dictionary) -> void:
	var actions: Array = _rule_builder.get("actions", [])
	if actions.is_empty():
		return
	var action: Dictionary = actions[actions.size() - 1]
	action["params"] = params
	actions[actions.size() - 1] = action
	_rule_builder["actions"] = actions


func _finalize_rule() -> void:
	_clear_popup_anchor()
	var rule: Dictionary = _rule_builder.duplicate(true)
	if _rule_editing_id >= 0:
		# Replace the existing rule in place (same index).
		var idx := -1
		for i: int in _event_rules.size():
			if int(_event_rules[i].get("id", -1)) == _rule_editing_id:
				idx = i
				break
		if idx >= 0:
			rule["id"] = _rule_editing_id
			_event_rules[idx] = rule
			_show_toast("Rule updated!")
		else:
			rule["id"] = _next_rule_id
			_next_rule_id += 1
			_event_rules.append(rule)
			_show_toast("Rule created!")
	else:
		rule["id"] = _next_rule_id
		_next_rule_id += 1
		_event_rules.append(rule)
		_show_toast("Rule created!")
	_director_visuals.set_rules(_event_rules)
	_reset_rule_builder()
	_refresh_status()


func _cancel_rule_build() -> void:
	_clear_popup_anchor()
	_reset_rule_builder()
	if _trigger_popup != null:
		_trigger_popup.hide()
	if _rule_action_popup != null:
		_rule_action_popup.hide()
	if _rule_more_popup != null:
		_rule_more_popup.hide()
	_refresh_status()


func _reset_rule_builder() -> void:
	_rule_step = RuleStep.IDLE
	_rule_builder = {}
	_rule_context_rig = null
	_rule_hint = ""
	_rule_editing_id = -1
	_apply_cursor()


func _delete_rule(id: int) -> void:
	var before := _event_rules.size()
	_event_rules = _event_rules.filter(func(r): return int(r.get("id", -1)) != id)
	if _event_rules.size() != before:
		_director_visuals.set_rules(_event_rules)
	_refresh_status()


## Re-enters the builder at SELECT_ACTION pre-populated from the stored rule
## (trigger edits are delete + rebuild, per the approved design).
func _begin_edit_rule(id: int) -> void:
	for rule: Dictionary in _event_rules:
		if int(rule.get("id", -1)) != id:
			continue
		var trigger: Dictionary = (rule.get("trigger", {}) as Dictionary).duplicate(true)
		var actions: Array = []
		for a: Dictionary in rule.get("actions", []):
			actions.append(a.duplicate(true))
		_rule_builder = { "trigger": trigger, "actions": actions }
		_rule_editing_id = id
		var source_id := int(trigger.get("source", -1))
		if source_id >= 0:
			var src := instance_from_id(source_id)
			if src is StickmanRig:
				_rule_context_rig = src
		_rule_step = RuleStep.SELECT_ACTION
		_set_popup_anchor(_mouse_popup_rect())
		_open_rule_action_popup()
		return


## True when any of trigger.source / trigger.target / an action.target is in ids.
func _rule_references_any(rule: Dictionary, ids: Array[int]) -> bool:
	var trigger: Dictionary = rule.get("trigger", {})
	if ids.has(int(trigger.get("source", -1))):
		return true
	if ids.has(int(trigger.get("target", -1))):
		return true
	for a: Dictionary in rule.get("actions", []):
		if ids.has(int(a.get("target", -1))):
			return true
	return false


func _cleanup_rules_for_nodes(nodes: Array[Node2D]) -> void:
	var ids: Array[int] = []
	for n: Node2D in nodes:
		ids.append(n.get_instance_id())
	_event_rules = _event_rules.filter(func(r): return not _rule_references_any(r, ids))
	_director_visuals.set_rules(_event_rules)


# ---------------------------------------------------------------------------
# Event engine (Phase 4)
# ---------------------------------------------------------------------------

func _on_rig_arrived(target: Vector2, rig: StickmanRig) -> void:
	_handle_event({ "type": "arrived_at_waypoint", "source": rig, "target": null, "position": target, "action": {} })


func _on_rig_action_finished(action: Dictionary, _index: int, rig: StickmanRig) -> void:
	_handle_event({ "type": "action_finished", "source": rig, "target": null, "position": rig.global_position, "action": action })


func _on_rig_speech_finished(rig: StickmanRig) -> void:
	_handle_event({ "type": "speech_finished", "source": rig, "target": null, "position": rig.global_position, "action": {} })


func _on_prop_collided(other: Node, prop: PropBlock) -> void:
	_handle_event({ "type": "collided", "source": prop, "target": other, "position": prop.global_position, "action": {} })


## Iterates every rule in order; every matching rule executes (no short-circuit).
func _handle_event(event: Dictionary) -> void:
	for rule: Dictionary in _event_rules:
		if _rule_matches(rule, event):
			_execute_rule_actions(rule)


func _rule_matches(rule: Dictionary, event: Dictionary) -> bool:
	var trigger: Dictionary = rule.get("trigger", {})
	var rule_type := String(trigger.get("type", ""))
	if rule_type != String(event.get("type", "")):
		return false
	var source := event.get("source") as Node2D
	var target := event.get("target") as Node2D
	var source_id := int(trigger.get("source", -1))
	var target_id := int(trigger.get("target", -1))
	match rule_type:
		"arrived_at_waypoint":
			if not _ids_match(source_id, source):
				return false
			var params: Dictionary = trigger.get("params", {})
			var waypoint: Vector2 = params.get("waypoint_pos", Vector2.INF)
			return (event.get("position", Vector2.INF) as Vector2).distance_to(waypoint) <= WAYPOINT_MATCH_EPSILON
		"action_finished":
			if not _ids_match(source_id, source):
				return false
			var trig_params: Dictionary = trigger.get("params", {})
			var want := String(trig_params.get("action_type", ""))
			var action: Dictionary = event.get("action", {})
			return want.is_empty() or want == String(action.get("type", ""))
		"speech_finished":
			return _ids_match(source_id, source)
		"entered_area":
			return _ids_match(target_id, target)
		"collided":
			return _ids_match(source_id, source) and _ids_match(target_id, target)
		_:
			return false


func _ids_match(a: int, b: Node2D) -> bool:
	return a == -1 or (b != null and is_instance_valid(b) and b.get_instance_id() == a)


func _execute_rule_actions(rule: Dictionary) -> void:
	for a: Dictionary in rule.get("actions", []):
		var rig := instance_from_id(int(a.get("target", -1))) as StickmanRig
		if rig == null or not is_instance_valid(rig):
			continue
		rig.enqueue_reactive([_action_for_rig(a)])


## Converts a rule action into the queue-action shape the runner understands.
func _action_for_rig(a: Dictionary) -> Dictionary:
	var params: Dictionary = a.get("params", {})
	var out: Dictionary = { "type": String(a.get("type", "")) }
	match String(a.get("type", "")):
		"walk_to":
			out["target"] = params.get("target", Vector2.ZERO)
		"speak":
			out["text"] = String(params.get("text", ""))
			out["duration"] = float(params.get("duration", 2.0))
		"wait":
			out["duration"] = float(params.get("duration", 0.0))
	return out


## Geometric overlap: TriggerArea children vs ANIMATED stickmen + unfrozen props.
## Edge-triggered on entry; emits an entered_area event per new overlap.
func _update_area_entry() -> void:
	var areas: Array[TriggerArea] = []
	for child: Node in _world.get_children():
		if child is TriggerArea:
			areas.append(child as TriggerArea)
	if areas.is_empty():
		return
	var movables: Array[Node2D] = []
	for node: Node2D in _world_children_selectable():
		if node is STICKMAN_RIG:
			var rig := node as STICKMAN_RIG
			if rig.state == StickmanRig.RigState.ANIMATED:
				movables.append(rig)
		elif node is PropBlock and not (node as PropBlock).freeze:
			movables.append(node)
	for area: TriggerArea in areas:
		var area_rect := (area.global_transform * area.get_area_rect()).abs()
		for node: Node2D in movables:
			var point := _movable_point(node)
			var key := "%d:%d" % [area.get_instance_id(), node.get_instance_id()]
			var inside: bool = area_rect.has_point(point)
			var was: bool = bool(_area_overlap.get(key, false))
			if inside and not was:
				_area_overlap[key] = true
				_handle_event({ "type": "entered_area", "source": node, "target": area, "position": point, "action": {} })
			elif not inside and was:
				_area_overlap[key] = false


## Geometric stickman-vs-prop collision (ANIMATED rigs x unfrozen props),
## edge-triggered via the prop's world AABB containing the rig's feet/root point.
func _update_stickman_prop_collision() -> void:
	var rigs: Array[StickmanRig] = []
	var props: Array[PropBlock] = []
	for node: Node2D in _world_children_selectable():
		if node is STICKMAN_RIG:
			var rig := node as STICKMAN_RIG
			if rig.state == StickmanRig.RigState.ANIMATED:
				rigs.append(rig)
		elif node is PropBlock and not (node as PropBlock).freeze:
			props.append(node as PropBlock)
	for rig: StickmanRig in rigs:
		for prop: PropBlock in props:
			var key := "%d:%d" % [rig.get_instance_id(), prop.get_instance_id()]
			var feet: Vector2 = rig.global_position - StickmanRig.FOOT_OFFSET
			var overlap: bool = STAGE_SELECTION.get_world_aabb(prop).has_point(feet)
			var was: bool = bool(_collision_pairs.get(key, false))
			if overlap and not was:
				_collision_pairs[key] = true
				_handle_event({ "type": "collided", "source": rig, "target": prop, "position": rig.global_position, "action": {} })
			elif not overlap and was:
				_collision_pairs[key] = false


## Stickman point = feet (root - FOOT_OFFSET); prop point = global position.
func _movable_point(node: Node2D) -> Vector2:
	if node is STICKMAN_RIG:
		return node.global_position - StickmanRig.FOOT_OFFSET
	return node.global_position


func _show_toast(msg: String) -> void:
	_toast_text = msg
	_toast_timer = 2.0


# ---------------------------------------------------------------------------
# Helpers
# ---------------------------------------------------------------------------

## Converts a world position to screen coordinates using the stage camera (the
## exact inverse of Camera2D.get_global_mouse_position()).
func _world_to_screen(world_pos: Vector2) -> Vector2:
	var vp_size := get_viewport().get_visible_rect().size
	return (world_pos - _camera.position) * _camera.zoom + vp_size * 0.5


func _set_zoom(value: float) -> void:
	var z := clampf(value, min_zoom, max_zoom)
	var old_zoom := _camera.zoom.x
	if is_equal_approx(z, old_zoom):
		return
	var mouse_world := _camera.get_global_mouse_position()
	_camera.zoom = Vector2(z, z)
	_camera.position = mouse_world - (mouse_world - _camera.position) * (old_zoom / z)


func _is_mouse_over_ui() -> bool:
	return get_viewport().gui_get_hovered_control() != null


func _snap_to_grid(v: Vector2) -> Vector2:
	if _grid_size <= 0.0:
		return v
	return Vector2(roundf(v.x / _grid_size) * _grid_size, roundf(v.y / _grid_size) * _grid_size)


func _apply_grid_settings() -> void:
	if _grid != null:
		_grid.grid_size = _grid_size
		_grid.enabled = _show_grid
		_grid.visible = _show_grid and current_mode == StageMode.EDIT
	if _gizmos != null:
		_gizmos.snap_size = _grid_size if _snap_enabled else 0.0


func _set_edit_controls_visible(visible: bool) -> void:
	for btn: Button in _palette_buttons.values():
		btn.visible = visible
	if _grid_check != null:
		_grid_check.visible = visible
	if _snap_check != null:
		_snap_check.visible = visible
	if _grid_size_spin != null:
		_grid_size_spin.visible = visible
	if _grid_size_label != null:
		_grid_size_label.visible = visible


func _set_direct_controls_visible(visible: bool) -> void:
	if _direct_hint_label != null:
		_direct_hint_label.visible = visible


## Direct Node2D children of World, excluding the ragdoll body container.
func _world_children_selectable() -> Array[Node2D]:
	var result: Array[Node2D] = []
	for child: Node in _world.get_children():
		var node := child as Node2D
		if node == null:
			continue
		if node.name == RAGDOLL_CONTAINER_NAME:
			continue
		result.append(node)
	return result

# ---------------------------------------------------------------------------
# Theme loading (Phase 4b)
# ---------------------------------------------------------------------------

## Loads the theme JSON. `source_path` is overridable for tests (missing /
## malformed fallback); defaults to the committed res:// theme.
func _load_theme(source_path: String = THEME_PATH) -> void:
	_theme = {}
	if not FileAccess.file_exists(source_path):
		push_warning("SandboxStage: theme file '%s' not found; using defaults." % source_path)
		return
	var file := FileAccess.open(source_path, FileAccess.READ)
	if file == null:
		return
	var json: Variant = JSON.parse_string(file.get_as_text())
	file.close()
	if not json is Dictionary:
		push_warning("SandboxStage: theme file '%s' is malformed; using defaults." % source_path)
		return
	_theme = json as Dictionary
	var fonts: Dictionary = _theme.get("fonts", {})
	_action_popup_font_size = int(fonts.get("action_popup_font_size", 24))
	_tooltip_font_size = int(fonts.get("tooltip_font_size", 18))
	_status_pill_font_size = int(fonts.get("status_pill_font_size", 16))
	_ui_font = _load_font(String(fonts.get("ui_font", "")))
	_emoji_font = _load_font(String(fonts.get("emoji_font", "")))
	var grid: Dictionary = _theme.get("grid", {})
	_theme_grid_default = clampf(float(grid.get("snap_size", DEFAULT_GRID_SIZE)), MIN_GRID_SIZE, MAX_GRID_SIZE)
	var colors: Dictionary = _theme.get("mode_colors", {})
	_accent_edit = _parse_color(String(colors.get("edit_accent", "")), _accent_edit)
	_accent_direct = _parse_color(String(colors.get("direct_accent", "")), _accent_direct)
	_accent_play = _parse_color(String(colors.get("play_accent", "")), _accent_play)
	_guide_line_color = _parse_color(String(colors.get("guide_line", "")), _guide_line_color)


static func _parse_color(html: String, fallback: Color) -> Color:
	var s := html.strip_edges()
	if s.begins_with("#"):
		s = s.substr(1)
	if s.is_empty():
		return fallback
	return Color.from_string(s, fallback)


func _load_font(path: String) -> Font:
	if path.is_empty():
		return null
	if not ResourceLoader.exists(path):
		push_warning("SandboxStage: theme font '%s' not found; using fallback." % path)
		return null
	var res := ResourceLoader.load(path)
	if res is Font:
		return res
	push_warning("SandboxStage: theme font '%s' is not a Font; using fallback." % path)
	return null


func _apply_theme_to_visuals() -> void:
	if _director_visuals != null:
		_director_visuals.set_style(_theme)
		_director_visuals.emoji_font = _emoji_font
	if _placement_overlay != null:
		_placement_overlay.guide_line_color = _guide_line_color

# ---------------------------------------------------------------------------
# Settings persistence
# ---------------------------------------------------------------------------

func _load_settings() -> void:
	if not FileAccess.file_exists(SETTINGS_PATH):
		return
	var file := FileAccess.open(SETTINGS_PATH, FileAccess.READ)
	if file == null:
		return
	var json: Variant = JSON.parse_string(file.get_as_text())
	file.close()
	if not json is Dictionary:
		return
	var d := json as Dictionary
	_grid_size = float(d.get("grid_size", DEFAULT_GRID_SIZE))
	_grid_size = clampf(_grid_size, MIN_GRID_SIZE, MAX_GRID_SIZE)
	_snap_enabled = bool(d.get("snap_to_grid", false))
	_show_grid = bool(d.get("show_grid", true))


func _save_settings() -> void:
	var data := {
		"version": "1.0",
		"grid_size": _grid_size,
		"snap_to_grid": _snap_enabled,
		"show_grid": _show_grid,
	}
	var file := FileAccess.open(SETTINGS_PATH, FileAccess.WRITE)
	if file:
		file.store_string(JSON.stringify(data, "\t", false))
		file.close()