<script setup>
import { ref, onMounted } from 'vue'
import { router } from '@inertiajs/vue3'

const props = defineProps({
  open: { type: Boolean, default: false },
  mode: { type: String, default: 'songdb' }, // 'songdb' | 'service-form' | 'pair-translation'
  serviceSongId: { type: Number, default: null },
  pairWithSongId: { type: Number, default: null },
  prefilledText: { type: String, default: null },
  autoEdit: { type: Boolean, default: false },
})

const emit = defineEmits(['close', 'imported', 'paired', 'edit-song'])

const pasteText = ref('')
const preview = ref(null)
const error = ref(null)
const loading = ref(false)
const existingSongId = ref(null)

onMounted(() => {
  if (props.prefilledText) {
    pasteText.value = props.prefilledText
    doPreview()
  }
})

function getCsrfToken() {
  const match = document.cookie.split('; ').find(r => r.startsWith('XSRF-TOKEN='))
  return match ? decodeURIComponent(match.split('=')[1]) : ''
}

async function doPreview() {
  if (!pasteText.value.trim()) return
  loading.value = true
  error.value = null
  preview.value = null
  existingSongId.value = null
  try {
    const res = await fetch(route('api.ccli.preview'), {
      method: 'POST',
      headers: { 'Content-Type': 'application/json', 'X-XSRF-TOKEN': getCsrfToken() },
      body: JSON.stringify({ raw_text: pasteText.value }),
    })
    const data = await res.json()
    if (!res.ok) {
      error.value = data.message || 'Fehler beim Verarbeiten des Textes.'
    } else {
      preview.value = data
      if (props.autoEdit && (props.mode === 'songdb' || props.mode === 'service-form')) {
        await doImport('edit')
      }
    }
  } catch {
    error.value = 'Netzwerkfehler. Bitte versuche es erneut.'
  } finally {
    loading.value = false
  }
}

async function doImport(importMode) {
  loading.value = true
  error.value = null
  existingSongId.value = null

  const modeMap = {
    edit: 'create',
    stay: 'create',
    assign: 'assign-to-service-song',
    pair: 'pair-with-song',
  }
  const targetMap = {
    assign: props.serviceSongId,
    pair: props.pairWithSongId,
  }

  try {
    const res = await fetch(route('api.ccli.import'), {
      method: 'POST',
      headers: { 'Content-Type': 'application/json', 'X-XSRF-TOKEN': getCsrfToken() },
      body: JSON.stringify({
        raw_text: pasteText.value,
        mode: modeMap[importMode],
        target_id: targetMap[importMode] ?? null,
      }),
    })
    const data = await res.json()

    if (res.status === 409) {
      existingSongId.value = data.existing_song_id
      error.value = data.message
      return
    }
    if (!res.ok) {
      error.value = data.message || 'Import fehlgeschlagen.'
      return
    }

    if (importMode === 'edit') {
      emit('edit-song', data.song_id)
      emit('close')
    } else if (importMode === 'pair') {
      router.visit('/songs/' + props.pairWithSongId + '/translate?prefilled=true')
    } else {
      emit('imported', data.song_id, importMode)
      emit('close')
    }
  } catch {
    error.value = 'Netzwerkfehler. Bitte versuche es erneut.'
  } finally {
    loading.value = false
  }
}
</script>

<template>
  <Teleport to="body">
  <div v-if="open" class="fixed inset-0 z-[60] flex items-center justify-center bg-black/50">
    <div class="bg-white rounded-lg shadow-xl w-full max-w-2xl mx-4 p-6">
      <!-- Header -->
      <div class="flex items-center justify-between mb-4">
        <h2 class="text-lg font-semibold text-gray-900">
          {{ mode === 'pair-translation' ? 'Übersetzung aus SongSelect übernehmen' : 'Song aus SongSelect importieren' }}
        </h2>
        <button
          data-testid="ccli-close-button"
          @click="$emit('close')"
          class="text-gray-400 hover:text-gray-600"
        >
          <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
          </svg>
        </button>
      </div>

      <!-- Instructions -->
      <ol class="text-sm text-gray-600 mb-4 space-y-1 list-decimal list-inside">
        <li>Öffne die Liedseite auf <strong>songselect.ccli.com</strong></li>
        <li>Klicke das <strong>Kopier-Symbol</strong> neben dem Liedtext – es kopiert Titel, Liedtext und CCLI-Infos</li>
        <li>Füge alles unten ein und klicke auf <strong>„Vorschau"</strong></li>
      </ol>

      <!-- Textarea -->
      <textarea
        data-testid="ccli-paste-textarea"
        v-model="pasteText"
        rows="10"
        class="w-full border border-gray-300 rounded-md p-3 font-mono text-sm resize-y focus:outline-none focus:ring-2 focus:ring-blue-500"
        placeholder="Liedtext hier einfügen..."
      />

      <!-- Preview button + spinner -->
      <div class="mt-3 flex items-center gap-3">
        <button
          data-testid="ccli-preview-button"
          @click="doPreview"
          :disabled="!pasteText.trim() || loading"
          class="px-4 py-2 bg-blue-600 text-white rounded-md text-sm font-medium hover:bg-blue-700 disabled:opacity-50 disabled:cursor-not-allowed"
        >
          Vorschau
        </button>
        <span
          v-if="loading"
          data-testid="ccli-loading-spinner"
          class="inline-block animate-spin text-blue-600 text-xl"
        >⟳</span>
      </div>

      <!-- Error message -->
      <div
        v-if="error"
        data-testid="ccli-error-message"
        class="mt-3 p-3 bg-red-50 border border-red-200 rounded-md text-sm text-red-700"
      >
        {{ error }}
        <button
          v-if="existingSongId"
          type="button"
          @click="emit('edit-song', existingSongId); emit('close')"
          data-testid="ccli-existing-song-link"
          class="ml-2 underline font-medium"
        >Vorhandenen Song bearbeiten</button>
      </div>

      <!-- Preview pane -->
      <div v-if="preview" class="mt-4 p-4 bg-gray-50 rounded-md border border-gray-200">
        <div class="grid grid-cols-2 gap-2 text-sm mb-3">
          <div><span class="text-gray-500">Titel:</span> <strong>{{ preview.title }}</strong></div>
          <div><span class="text-gray-500">Autor:</span> {{ preview.author || '–' }}</div>
          <div><span class="text-gray-500">CCLI-Nr.:</span> {{ preview.ccliId || '–' }}</div>
          <div><span class="text-gray-500">Jahr:</span> {{ preview.year || '–' }}</div>
        </div>
        <div class="max-h-72 overflow-auto space-y-3">
          <div
            v-for="(section, si) in preview.sections"
            :key="si"
            data-testid="ccli-preview-section"
          >
            <div class="flex items-center gap-2">
              <h4 class="text-xs font-semibold text-gray-700">{{ section.label }}</h4>
              <span
                v-if="section.hasTranslation"
                class="rounded-full bg-emerald-50 px-2 py-0.5 text-[10px] font-medium text-emerald-700"
              >mit Übersetzung</span>
            </div>
            <p class="mt-0.5 whitespace-pre-wrap text-xs text-gray-500">{{ section.lines?.join('\n') }}</p>
          </div>
        </div>
      </div>

      <!-- Action buttons (shown after preview) -->
      <div v-if="preview" class="mt-4 flex gap-3">
        <!-- songdb mode -->
        <template v-if="mode === 'songdb'">
          <button
            data-testid="ccli-import-edit-button"
            @click="doImport('edit')"
            :disabled="loading"
            class="px-4 py-2 bg-green-600 text-white rounded-md text-sm font-medium hover:bg-green-700 disabled:opacity-50"
          >
            Importieren &amp; Bearbeiten
          </button>
          <button
            data-testid="ccli-import-stay-button"
            @click="doImport('stay')"
            :disabled="loading"
            class="px-4 py-2 bg-gray-600 text-white rounded-md text-sm font-medium hover:bg-gray-700 disabled:opacity-50"
          >
            Importieren
          </button>
        </template>

        <!-- service-form mode -->
        <template v-else-if="mode === 'service-form'">
          <button
            data-testid="ccli-import-edit-button"
            @click="doImport('edit')"
            :disabled="loading"
            class="px-4 py-2 bg-green-600 text-white rounded-md text-sm font-medium hover:bg-green-700 disabled:opacity-50"
          >
            Importieren &amp; Bearbeiten
          </button>
          <button
            data-testid="ccli-import-assign-button"
            @click="doImport('assign')"
            :disabled="loading"
            class="px-4 py-2 bg-blue-600 text-white rounded-md text-sm font-medium hover:bg-blue-700 disabled:opacity-50"
          >
            Importieren &amp; Zuweisen
          </button>
        </template>

        <!-- pair-translation mode -->
        <template v-else-if="mode === 'pair-translation'">
          <button
            data-testid="ccli-pair-translation-button"
            @click="doImport('pair')"
            :disabled="loading"
            class="px-4 py-2 bg-purple-600 text-white rounded-md text-sm font-medium hover:bg-purple-700 disabled:opacity-50"
          >
            Übersetzung übernehmen
          </button>
        </template>
      </div>
    </div>
  </div>
  </Teleport>
</template>
