from flask import Blueprint, request, jsonify
from api.utils import get_validated_user_id, admin_required
from db.tracking import get_tracking_events_by_child, get_tracking_events_by_user
from models.tracking_event import TrackingEvent


tracking_api = Blueprint('tracking_api', __name__)


@tracking_api.route('/admin/tracking', methods=['GET'])
@admin_required
def get_tracking():
    """
    Admin endpoint to query tracking events with filters and pagination.
    
    Query params:
    - child_id: Filter by child ID (optional)
    - user_id: Filter by user ID (optional, admin only)
    - entity_type: Filter by entity type (task/reward/penalty) (optional)
    - action: Filter by action type (activated/requested/redeemed/cancelled) (optional)
    - limit: Max results (default 50, max 500)
    - offset: Pagination offset (default 0)
    """
    child_id = request.args.get('child_id')
    filter_user_id = request.args.get('user_id')
    entity_type = request.args.get('entity_type')
    action = request.args.get('action')
    limit = int(request.args.get('limit', 50))
    offset = int(request.args.get('offset', 0))
    
    # Validate limit
    limit = min(max(limit, 1), 500)
    offset = max(offset, 0)
    
    # Validate filters
    if entity_type and entity_type not in ['task', 'reward', 'penalty']:
        return jsonify({'error': 'Invalid entity_type', 'code': 'INVALID_ENTITY_TYPE'}), 400
    
    if action and action not in ['activated', 'requested', 'redeemed', 'cancelled']:
        return jsonify({'error': 'Invalid action', 'code': 'INVALID_ACTION'}), 400
    
    # Query tracking events
    if child_id:
        events, total = get_tracking_events_by_child(
            child_id=child_id,
            limit=limit,
            offset=offset,
            entity_type=entity_type,
            action=action
        )
    elif filter_user_id:
        events, total = get_tracking_events_by_user(
            user_id=filter_user_id,
            limit=limit,
            offset=offset,
            entity_type=entity_type
        )
    else:
        return jsonify({
            'error': 'Either child_id or user_id is required',
            'code': 'MISSING_FILTER'
        }), 400
    
    # Convert to dict
    events_data = [event.to_dict() for event in events]
    
    return jsonify({
        'tracking_events': events_data,
        'total': total,
        'limit': limit,
        'offset': offset,
        'count': len(events_data)
    }), 200