<template>
  <div class="view">
    <EntityEditForm
      entityLabel="Kindness Act"
      :fields="fields"
      :initialData="initialData"
      :isEdit="isEdit"
      :loading="loading"
      :error="error"
      @submit="handleSubmit"
      @cancel="handleCancel"
      @add-image="handleAddImage"
    />
  </div>
</template>

<script setup lang="ts">
import { ref, onMounted, computed, nextTick } from 'vue'
import { useRouter } from 'vue-router'
import EntityEditForm from '../shared/EntityEditForm.vue'
import { maybeShow as tutorialMaybeShow } from '@/tutorial/controller'
import '@/assets/styles.css'

const props = defineProps<{ id?: string }>()
const router = useRouter()
const isEdit = computed(() => !!props.id)

const fields = [
  { name: 'name', label: 'Name', type: 'text' as const, required: true, maxlength: 64 },
  { name: 'points', label: 'Points', type: 'number' as const, required: true, min: 1, max: 1000 },
  { name: 'image_id', label: 'Image', type: 'image' as const, imageType: 2 },
]

const initialData = ref({ name: '', points: 1, image_id: null })
const localImageFile = ref<File | null>(null)
const loading = ref(false)
const error = ref<string | null>(null)

onMounted(async () => {
  if (!isEdit.value) tutorialMaybeShow('edit-kindness-name')
  if (isEdit.value && props.id) {
    loading.value = true
    try {
      const resp = await fetch(`/api/kindness/${props.id}`)
      if (!resp.ok) throw new Error('Failed to load kindness act')
      const data = await resp.json()
      initialData.value = {
        name: data.name ?? '',
        points: Number(data.points) || 1,
        image_id: data.image_id ?? null,
      }
    } catch {
      error.value = 'Could not load kindness act.'
    } finally {
      loading.value = false
      await nextTick()
    }
  }
})

function handleAddImage({ id, file }: { id: string; file: File }) {
  if (id === 'local-upload') localImageFile.value = file
}

async function handleSubmit(form: { name: string; points: number; image_id: string | null }) {
  let imageId = form.image_id
  error.value = null
  if (!form.name.trim()) {
    error.value = 'Name is required.'
    return
  }
  if (form.points < 1) {
    error.value = 'Points must be at least 1.'
    return
  }
  loading.value = true

  if (imageId === 'local-upload' && localImageFile.value) {
    const formData = new FormData()
    formData.append('file', localImageFile.value)
    formData.append('type', '2')
    formData.append('permanent', 'false')
    try {
      const resp = await fetch('/api/image/upload', { method: 'POST', body: formData })
      if (!resp.ok) throw new Error('Image upload failed')
      const data = await resp.json()
      imageId = data.id
    } catch {
      error.value = 'Failed to upload image.'
      loading.value = false
      return
    }
  }

  try {
    const url = isEdit.value && props.id ? `/api/kindness/${props.id}/edit` : '/api/kindness/add'
    const resp = await fetch(url, {
      method: 'PUT',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ name: form.name, points: form.points, image_id: imageId }),
    })
    if (!resp.ok) throw new Error('Failed to save kindness act')
    await router.push({ name: 'KindnessView' })
  } catch {
    error.value = 'Failed to save kindness act.'
  }
  loading.value = false
}

function handleCancel() {
  router.back()
}
</script>

<style scoped>
.view {
  max-width: 400px;
  margin: 0 auto;
  background: var(--form-bg);
  border-radius: 12px;
  box-shadow: 0 4px 24px var(--form-shadow);
  padding: 2rem 2.2rem 1.5rem 2.2rem;
}
</style>
