<template>
  <a-modal
    v-model:open="visible"
    :title="modalTitle"
    width="900px"
    :footer="null"
    :maskClosable="false"
    class="video-selector-modal"
  >
    <div class="video-selector">
      <!-- 搜索栏 -->
      <div class="search-bar">
        <div class="search-input-wrapper">
          <SearchOutlined class="search-icon" />
          <a-input-search
            v-model:value="searchKeyword"
            placeholder="输入视频名称进行搜索..."
            allow-clear
            @search="handleSearch"
            class="search-input"
          />
        </div>
      </div>

      <!-- 视频网格 -->
      <div class="video-grid">
        <!-- 骨架屏加载状态 -->
        <a-skeleton
          v-if="loading"
          v-for="n in 6"
          :key="n"
          :loading="true"
          :active="true"
          :avatar="false"
          :title="false"
          class="video-card-skeleton"
        >
          <template #default>
            <div class="skeleton-thumbnail"></div>
            <div class="skeleton-content">
              <a-skeleton-title class="skeleton-title" />
              <a-skeleton-paragraph class="skeleton-meta" :rows="1" />
            </div>
          </template>
        </a-skeleton>

        <!-- 视频列表 -->
        <div
          v-for="video in videoList"
          :key="video.id"
          class="video-card"
          :class="{ selected: selectedVideoId === video.id }"
          @click="selectVideo(video)"
          role="button"
          :aria-label="`选择视频: ${video.fileName}`"
        >
          <div class="video-thumbnail">
            <img
              :src="getVideoPreviewUrl(video) || defaultCover"
              :alt="video.fileName"
              @error="handleImageError"
              loading="lazy"
            />
            <div class="video-duration">{{ formatDuration(video.duration) }}</div>
            <div class="video-selected-mark" v-if="selectedVideoId === video.id">
              <CheckOutlined />
            </div>
          </div>
          <div class="video-info">
            <div class="video-title" :title="video.fileName">
              <span class="title-text">{{ video.fileName }}</span>
            </div>
            <div class="video-meta">
              <span class="meta-item">
                <VideoCameraOutlined />
                {{ formatFileSize(video.fileSize) }}
              </span>
              <span class="meta-item">
                <ClockCircleOutlined />
                {{ formatDuration(video.duration) }}
              </span>
            </div>
          </div>
        </div>

        <!-- 空状态 -->
        <div v-if="!loading && videoList.length === 0" class="empty-state">
          <div class="empty-illustration">
            <div class="empty-icon-wrapper">
              <PictureOutlined class="empty-icon" />
            </div>
            <div class="empty-text">
              <h3 class="empty-title">
                {{ searchKeyword ? '未找到匹配的视频' : '暂无视频' }}
              </h3>
              <p class="empty-description">
                {{ searchKeyword ? '尝试使用不同的关键词搜索' : '请先上传视频文件' }}
              </p>
              <a-button v-if="searchKeyword" type="link" @click="clearSearch" class="clear-search-btn">
                <CloseOutlined /> 清除搜索条件
              </a-button>
            </div>
          </div>
        </div>
      </div>

      <!-- 分页 -->
      <div class="pagination-wrapper" v-if="total > pageSize">
        <a-pagination
          v-model:current="currentPage"
          v-model:page-size="pageSize"
          :total="total"
          show-size-changer
          show-quick-jumper
          :show-total="(total, range) => `第 ${range[0]}-${range[1]} 条，共 ${total} 条`"
          @change="handlePageChange"
          @show-size-change="handlePageSizeChange"
        />
      </div>

      <!-- 底部操作栏 -->
      <div class="modal-footer">
        <a-button @click="handleCancel">取消</a-button>
        <a-button type="primary" @click="handleConfirm" :disabled="!selectedVideoId">
          确认选择
        </a-button>
      </div>
    </div>
  </a-modal>
</template>

<script setup>
import { ref, computed, watch } from 'vue'
import { message } from 'ant-design-vue'
import {
  CheckOutlined,
  PictureOutlined,
  VideoCameraOutlined,
  ClockCircleOutlined,
  SearchOutlined,
  CloseOutlined
} from '@ant-design/icons-vue'
import { MaterialService } from '@/api/material'

const props = defineProps({
  open: {
    type: Boolean,
    default: false
  }
})

const emit = defineEmits(['update:open', 'select'])

const visible = computed({
  get: () => props.open,
  set: (val) => emit('update:open', val)
})

const loading = ref(false)
const videoList = ref([])
const selectedVideoId = ref(null)
const selectedVideo = ref(null)
const searchKeyword = ref('')
const currentPage = ref(1)
const pageSize = ref(20)
const total = ref(0)

const defaultCover = 'data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjAwIiBoZWlnaHQ9IjExMCIgdmlld0JveD0iMCAwIDIwMCAxMTAiIGZpbGw9Im5vbmUiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+CjxyZWN0IHdpZHRoPSIyMDAiIGhlaWdodD0iMTEwIiBmaWxsPSIjMzc0MTUxIi8+CjxwYXRoIGQ9Ik04NSA0NUwxMTUgNjVMMTA1IDg1TDc1IDc1TDg1IDQ1WiIgZmlsbD0iIzU3MjY1MSIvPgo8L3N2Zz4K'

const modalTitle = '选择视频'

// 获取视频列表
const fetchVideoList = async () => {
  loading.value = true
  try {
    const params = {
      page: currentPage.value,
      pageSize: pageSize.value,
      fileCategory: 'digital_human',
      fileName: searchKeyword.value.trim() || undefined
    }

    const res = await MaterialService.getFilePage(params)
    if (res.code === 0) {
      videoList.value = res.data.list || []
      total.value = res.data.total || 0
    } else {
      message.error(res.msg || '获取视频列表失败')
    }
  } catch (error) {
    console.error('获取视频列表失败:', error)
    message.error('获取视频列表失败')
  } finally {
    loading.value = false
  }
}

const handleSearch = () => {
  currentPage.value = 1
  fetchVideoList()
}

const clearSearch = () => {
  searchKeyword.value = ''
  currentPage.value = 1
  fetchVideoList()
}

const handlePageChange = (page, size) => {
  currentPage.value = page
  if (size) {
    pageSize.value = size
  }
  fetchVideoList()
}

const handlePageSizeChange = (_current, size) => {
  currentPage.value = 1
  pageSize.value = size
  fetchVideoList()
}

const selectVideo = (video) => {
  selectedVideoId.value = video.id
  selectedVideo.value = video
}

const handleImageError = (event) => {
  event.target.src = defaultCover
}

const formatDuration = (seconds) => {
  if (!seconds) return '--:--'
  const minutes = Math.floor(seconds / 60)
  const remainingSeconds = Math.floor(seconds % 60)
  return `${String(minutes).padStart(2, '0')}:${String(remainingSeconds).padStart(2, '0')}`
}

const formatFileSize = (bytes) => {
  if (!bytes) return '0 B'
  const units = ['B', 'KB', 'MB', 'GB']
  const index = Math.floor(Math.log2(bytes) / 10)
  const size = bytes / Math.pow(1024, index)
  return `${size.toFixed(1)} ${units[index]}`
}

const getVideoPreviewUrl = (video) => {
  if (video.coverBase64) {
    return video.coverBase64.startsWith('data:')
      ? video.coverBase64
      : `data:image/jpeg;base64,${video.coverBase64}`
  }
  return video.previewUrl || video.coverUrl || defaultCover
}

const handleCancel = () => {
  visible.value = false
  selectedVideoId.value = null
  selectedVideo.value = null
  searchKeyword.value = ''
}

const handleConfirm = () => {
  if (!selectedVideo.value) {
    message.warning('请选择一个视频')
    return
  }

  emit('select', selectedVideo.value)
  handleCancel()
}

// 监听modal打开
watch(() => props.open, (isOpen) => {
  if (isOpen) {
    videoList.value = []
    selectedVideoId.value = null
    selectedVideo.value = null
    currentPage.value = 1
    fetchVideoList()
  }
})
</script>

<style scoped>
.video-selector {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* 搜索栏样式 */
.search-bar {
  padding: 16px;
  background: #f9fafb;
  border-radius: 8px;
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 12px;
  z-index: 100;
  color: #9ca3af;
  font-size: 16px;
}

.search-input :deep(.ant-input) {
  padding-left: 36px;
  padding-right: 12px;
  height: 40px;
  background: #ffffff;
  border-radius: 6px;
  color: #111827;
  font-size: 14px;
}

.search-input :deep(.ant-input-group),
.search-input :deep(.ant-input-group-wrapper),
.search-input :deep(.ant-input-group-addon) {
  display: block;
}

.search-input :deep(.ant-input-group-addon) {
  display: none;
}

.search-input :deep(.ant-input):focus,
.search-input :deep(.ant-input-affix-wrapper-focused) {
  border-color: #3b82f6;
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.search-input :deep(.ant-input::placeholder) {
  color: #9ca3af;
}

/* 视频网格样式 */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  max-height: 500px;
  overflow-y: auto;
  padding: 4px;
}

.video-grid::-webkit-scrollbar {
  width: 6px;
}

.video-grid::-webkit-scrollbar-track {
  background: #f3f4f6;
  border-radius: 3px;
}

.video-grid::-webkit-scrollbar-thumb {
  background: #d1d5db;
  border-radius: 3px;
}

.video-grid::-webkit-scrollbar-thumb:hover {
  background: #9ca3af;
}

/* 视频卡片样式 */
.video-card {
  background: #ffffff;
  border: 3px solid transparent;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.video-card:hover {
  border-color: #3b82f6;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
}

.video-card.selected {
  border-color: #3B82F6;
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

.video-card:focus-visible {
  border-color: #3B82F6;
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

/* 缩略图样式 */
.video-thumbnail {
  position: relative;
  width: 100%;
  height: 112px;
  overflow: hidden;
  background: #f3f4f6;
}

.video-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
}

.video-selected-mark {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 24px;
  height: 24px;
  background: #3B82F6;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

/* 信息区域样式 */
.video-info {
  padding: 14px;
}

.video-title {
  font-size: 14px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 10px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.video-meta {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: #6b7280;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* 空状态样式 */
.empty-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: #6b7280;
}

.empty-illustration {
  text-align: center;
}

.empty-icon-wrapper {
  width: 80px;
  height: 80px;
  margin: 0 auto 16px;
  background: #f3f4f6;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.empty-icon {
  font-size: 36px;
  color: #9ca3af;
}

.empty-text {
  max-width: 400px;
}

.empty-title {
  font-size: 16px;
  font-weight: 600;
  color: #111827;
  margin: 0 0 8px 0;
}

.empty-description {
  font-size: 14px;
  color: #6b7280;
  margin: 0;
}

.clear-search-btn {
  margin-top: 12px;
  color: #3b82f6;
  font-weight: 500;
}

.clear-search-btn:hover {
  color: #60a5fa;
}

/* 分页样式 */
.pagination-wrapper {
  display: flex;
  justify-content: center;
  padding: 16px 0;
  border-top: 1px solid #e5e7eb;
  background: #f9fafb;
  border-radius: 8px;
  margin-top: 8px;
}

/* 底部操作栏样式 */
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px 20px;
  border-top: 1px solid #e5e7eb;
  background: #f9fafb;
  border-radius: 8px;
  margin-top: 8px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
  }

  .video-thumbnail {
    height: 100px;
  }

  .video-info {
    padding: 10px;
  }

  .video-title {
    font-size: 13px;
  }

  .video-meta {
    gap: 8px;
    font-size: 11px;
  }

  .search-bar {
    padding: 12px;
  }

  .modal-footer {
    padding: 12px 0;
  }
}

@media (max-width: 480px) {
  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
  }

  .video-thumbnail {
    height: 90px;
  }

  .video-info {
    padding: 8px;
  }

  .search-input :deep(.ant-input) {
    height: 36px;
    font-size: 13px;
  }

  .modal-footer .ant-btn {
    height: 32px;
    padding: 0 12px;
    font-size: 13px;
  }
}

/* 骨架屏样式 */
.video-card-skeleton {
  background: #ffffff;
  border: 2px solid transparent;
  border-radius: 8px;
  overflow: hidden;
}

.skeleton-thumbnail {
  width: 100%;
  height: 112px;
  background: #f3f4f6;
}

.skeleton-content {
  padding: 14px;
}

.skeleton-title {
  margin-bottom: 10px;
}

.skeleton-meta :deep(.ant-skeleton-paragraph > li) {
  height: 16px;
  width: 60px;
  background: #f3f4f6;
  border-radius: 4px;
}

@media (max-width: 768px) {
  .skeleton-thumbnail {
    height: 100px;
  }
  .skeleton-content {
    padding: 10px;
  }
}

@media (max-width: 480px) {
  .skeleton-thumbnail {
    height: 90px;
  }
  .skeleton-content {
    padding: 8px;
  }
  .skeleton-meta :deep(.ant-skeleton-paragraph > li) {
    width: 50px;
  }
}
</style>
