<script setup lang="ts">
import { computed, onMounted, ref } from 'vue'
import { useI18n } from 'vue-i18n'
import { api, type Project, type Tag, type Task } from '../api'
import { statusOptions } from '../taskui'
import TaskBadges from '../components/TaskBadges.vue'

// Классический вид (ТЗ 3.6): список с фильтрами — проект, тег, статус.
// Фильтры применяются сразу при смене значения.

const { t } = useI18n()

const tasks = ref<Task[]>([])
const projects = ref<Project[]>([])
const tags = ref<Tag[]>([])
const error = ref('')
const loading = ref(false)

const filters = ref({
  status: '',
  project_id: '',
  tag_id: '',
})

async function load() {
  loading.value = true
  error.value = ''
  try {
    tasks.value = await api.listTasks({
      detail_state: 'approved',
      status: filters.value.status,
      project_id: filters.value.project_id,
      tag_id: filters.value.tag_id,
    })
  } catch (e) {
    error.value = String(e)
  } finally {
    loading.value = false
  }
}

onMounted(async () => {
  await load()
  projects.value = await api.listProjects()
  tags.value = await api.listTags()
})

async function setStatus(task: Task, status: string) {
  error.value = ''
  try {
    await api.updateTask(task.id, { status })
    await load()
  } catch (e) {
    error.value = String(e)
  }
}

// Удаление — через подтверждение
const deleteTarget = ref<Task | null>(null)
const confirmOpen = ref(false)

function askDelete(task: Task) {
  deleteTarget.value = task
  confirmOpen.value = true
}

async function remove() {
  const task = deleteTarget.value
  if (!task) return
  confirmOpen.value = false
  error.value = ''
  try {
    await api.deleteTask(task.id)
    await load()
  } catch (e) {
    error.value = String(e)
  }
}

// Опции фильтра/смены статуса: «любой» + все статусы
const statusOptionsWithAny = computed(() => [
  { value: '', label: t('common.anyStatus') },
  ...statusOptions(),
])

// Меню «⋯» в карточке: смена статуса (отмечен текущий), удаление
function taskMenu(task: Task) {
  return [
    ...statusOptions().map((o) => ({
      label: o.label,
      icon: o.value === task.status ? 'ph-check' : undefined,
      onSelect: () => setStatus(task, o.value),
    })),
    { label: t('stack.deleteTask'), icon: 'ph-trash', danger: true, onSelect: () => askDelete(task) },
  ]
}
</script>

<template>
  <section>
    <GnPageHeader kicker="gntodo" :title="t('list.title')">
      <template #meta>{{ t('list.count', { n: tasks.length }) }}</template>
    </GnPageHeader>

    <!-- Фильтры в одну строку (переносятся на мобильных); применяются сразу -->
    <GnToolbar class="filters">
      <GnSelect
        v-model="filters.status"
        class="filter-select"
        :options="statusOptionsWithAny"
        @update:model-value="load"
      />
      <GnSelect
        v-model="filters.project_id"
        class="filter-select"
        icon="ph-folder"
        :options="[
          { value: '', label: t('common.any') },
          ...projects.map((p) => ({ value: String(p.id), label: p.name })),
        ]"
        @update:model-value="load"
      />
      <GnSelect
        v-model="filters.tag_id"
        class="filter-select"
        icon="ph-tag"
        :options="[
          { value: '', label: t('common.any') },
          ...tags.map((tg) => ({ value: String(tg.id), label: tg.name })),
        ]"
        @update:model-value="load"
      />
    </GnToolbar>

    <GnAlert v-if="error" variant="error">{{ error }}</GnAlert>

    <GnSkeleton v-if="loading" type="block" stack :count="3" class="list-skeleton" />

    <GnEmptyState
      v-if="!loading && tasks.length === 0"
      icon="ph-list-magnifying-glass"
      :title="t('list.emptyTitle')"
      :text="t('list.emptyText')"
    />

    <div class="task-list">
      <GnCard v-for="task in tasks" :key="task.id" class="task-card">
        <div class="task-main">
          <span class="title" :class="{ done: task.status === 'done' }">{{ task.title }}</span>
          <GnDropdown class="task-menu" :items="taskMenu(task)">
            <template #trigger="{ toggle }">
              <GnIconButton icon="ph-dots-three-outline" :label="t('common.edit')" @click="toggle" />
            </template>
          </GnDropdown>
        </div>
        <div class="task-meta">
          <TaskBadges :task="task" />
        </div>
      </GnCard>
    </div>

    <GnConfirmDialog
      v-model:open="confirmOpen"
      :title="t('common.confirmTitle')"
      :message="t('common.deleteConfirmTask', { title: deleteTarget?.title ?? '' })"
      :confirm-text="t('common.delete')"
      :cancel-text="t('common.cancel')"
      confirm-variant="danger"
      @confirm="remove"
    />
  </section>
</template>

<style scoped>
.filters {
  margin-bottom: 1.5rem;
}
/* GnSelect рендерит div.form-group > label > div.select-wrap > select — сжимаем обёртки */
.filters :deep(.form-group) {
  width: auto;
  margin-bottom: 0;
}
.filters :deep(.select-wrap) {
  width: 14rem;
  margin-top: 0;
}
.list-skeleton {
  margin-bottom: 1rem;
}
.task-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.task-main {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}
.task-main .title {
  flex: 1;
  min-width: 0;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.task-main .title.done {
  text-decoration: line-through;
  color: var(--text-muted, #888);
}
.task-menu {
  flex: none;
}
.task-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  align-items: center;
  margin-top: 0.5rem;
}
</style>