<template>
  <div class="view">
    <EntityEditForm
      entityLabel="Reward"
      :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 '@/assets/styles.css'

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

const fields: {
  name: string
  label: string
  type: 'text' | 'number' | 'image'
  required?: boolean
  maxlength?: number
  min?: number
  max?: number
  imageType?: number
}[] = [
  { name: 'name', label: 'Reward Name', type: 'text', required: true, maxlength: 64 },
  { name: 'description', label: 'Description', type: 'text', maxlength: 128 },
  { name: 'cost', label: 'Cost', type: 'number', required: true, min: 1, max: 10000 },
  { name: 'image_id', label: 'Image', type: 'image', imageType: 2 },
]
// removed duplicate defineProps
const initialData = ref({ name: '', description: '', cost: 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 && props.id) {
    loading.value = true
    try {
      const resp = await fetch(`/api/reward/${props.id}`)
      if (!resp.ok) throw new Error('Failed to load reward')
      const data = await resp.json()
      initialData.value = {
        name: data.name ?? '',
        description: data.description ?? '',
        cost: Number(data.cost) || 1,
        image_id: data.image_id ?? null,
      }
    } catch {
      error.value = 'Could not load reward.'
    } 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
  description: string
  cost: number
  image_id: string | null
}) {
  let imageId = form.image_id
  error.value = null
  if (!form.name.trim()) {
    error.value = 'Reward name is required.'
    return
  }
  if (form.cost < 1) {
    error.value = 'Cost must be at least 1.'
    return
  }
  loading.value = true

  // If the selected image is a local upload, upload it first
  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
    }
  }

  // Now update or create the reward
  try {
    let resp
    if (isEdit.value && props.id) {
      resp = await fetch(`/api/reward/${props.id}/edit`, {
        method: 'PUT',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          name: form.name,
          description: form.description,
          cost: form.cost,
          image_id: imageId,
        }),
      })
    } else {
      resp = await fetch('/api/reward/add', {
        method: 'PUT',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          name: form.name,
          description: form.description,
          cost: form.cost,
          image_id: imageId,
        }),
      })
    }
    if (!resp.ok) throw new Error('Failed to save reward')
    await router.push({ name: 'RewardView' })
  } catch {
    error.value = 'Failed to save reward.'
  }
  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>
