<template>
  <div class="art-data-viewer">
    <!-- 视图切换头部 -->
    <div class="viewer-header" v-if="showViewToggle">
      <div class="header-left">
        <slot name="header-left"></slot>
      </div>
      <div class="header-right">
        <slot name="header-right"></slot>
      </div>
    </div>

    <!-- 表格视图 -->
    <div v-if="currentView === 'table'" class="table-view">
      <ArtTable
        ref="tableRef"
        :row-key="rowKey"
        :loading="loading"
        :data="data"
        :current-page="pagination.currentPage"
        :page-size="pagination.pageSize"
        :total="pagination.total"
        :margin-top="10"
        @selection-change="handleSelectionChange"
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
      >
        <template #default>
          <ElTableColumn v-for="col in tableColumns" :key="col.prop || col.type" v-bind="col" />
        </template>
      </ArtTable>
    </div>

    <!-- 描述列表视图 -->
    <div v-else class="descriptions-view">
      <div class="descriptions-grid">
        <ElCard
          v-for="(item, index) in data"
          :key="getItemKey(item, index)"
          shadow="hover"
          class="description-card"
          :class="{ selected: isCardSelected(item) }"
          @click="handleCardClick(item)"
        >
          <!-- 卡片左上角选择器 -->
          <div class="flex-row-sb">
            <div v-if="showCardSelection" class="card-selector-top-left" @click.stop>
              <ElCheckbox
                :model-value="isCardSelected(item)"
                @change="handleCardSelect(item, $event)"
              />
            </div>

            <!-- 卡片右上角操作按钮 -->
            <div v-if="showCardActions" class="card-actions-top-right" @click.stop>
              <slot name="card-actions" :item="item" :index="index"></slot>
            </div>
          </div>

          <ElDescriptions
            :column="descriptionsColumns"
            :label-width="labelWidth"
            border
            class="mt-20"
          >
            <ElDescriptionsItem
              v-for="field in visibleDescriptionsFields"
              :key="field.prop"
              :label="field.label"
              :span="field.span || 1"
            >
              <template v-if="field.formatter">
                <component :is="'div'" v-html="field.formatter(item)" />
              </template>
              <template v-else>
                <div class="field-content">{{ getFieldValue(item, field.prop) }}</div>
              </template>
            </ElDescriptionsItem>
          </ElDescriptions>
        </ElCard>
      </div>

      <!-- 分页器 -->
      <div v-if="showPagination" class="descriptions-pagination">
        <ElPagination
          v-model:current-page="pagination.currentPage"
          v-model:page-size="pagination.pageSize"
          :page-sizes="[10, 20, 50, 100]"
          :total="pagination.total"
          layout="total, sizes, prev, pager, next, jumper"
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
        />
      </div>
    </div>
  </div>
</template>

<script setup lang="ts">
  import {
    ElCard,
    ElDescriptions,
    ElDescriptionsItem,
    ElTableColumn,
    ElPagination,
    ElCheckbox
  } from 'element-plus'
  import ArtTable from '@/components/core/tables/ArtTable.vue'

  // 定义组件Props类型
  interface FieldConfig {
    prop: string
    label: string
    span?: number
    formatter?: (row: any) => string
  }

  interface TableColumn {
    prop?: string
    label?: string
    type?: string
    width?: number | string
    minWidth?: number | string
    formatter?: (row: any) => any
    [key: string]: any
  }

  interface PaginationConfig {
    currentPage: number
    pageSize: number
    total: number
  }

  const props = withDefaults(
    defineProps<{
      // 数据相关
      data: any[]
      loading?: boolean
      rowKey?: string

      // 表格配置
      tableColumns: TableColumn[]

      // 描述列表配置
      descriptionsFields: FieldConfig[]
      descriptionsColumns?: number
      cardTitleField?: string
      labelWidth?: string // 新增：描述列表标签宽度配置
      // 字段列配置（用于控制显示哪些字段）
      fieldColumns?: any[]

      // 分页配置
      pagination: PaginationConfig
      showPagination?: boolean

      // 视图配置
      defaultView?: 'table' | 'descriptions'
      showViewToggle?: boolean
      showCardActions?: boolean
      showCardSelection?: boolean
    }>(),
    {
      loading: false,
      rowKey: 'id',
      descriptionsColumns: 2,
      cardTitleField: 'name',
      labelWidth: '120px', // 默认标签宽度
      fieldColumns: () => [],
      showPagination: true,
      defaultView: 'table',
      showViewToggle: true,
      showCardActions: false,
      showCardSelection: false
    }
  )

  const emit = defineEmits<{
    selectionChange: [selection: any[]]
    sizeChange: [size: number]
    currentChange: [current: number]
    viewChange: [view: string]
  }>()

  // 当前视图模式
  const currentView = ref(props.defaultView)

  // 表格引用
  const tableRef = ref()

  // 卡片视图选择的项目
  const selectedCards = ref<any[]>([])

  // 计算可见的描述字段
  const visibleDescriptionsFields = computed(() => {
    if (!props.fieldColumns || props.fieldColumns.length === 0) {
      return props.descriptionsFields
    }

    // 过滤出选中的字段
    const checkedColumns = props.fieldColumns.filter((col) => col.checked !== false)
    return props.descriptionsFields.filter((field) =>
      checkedColumns.some((col) => col.prop === field.prop)
    )
  })

  // 监听props的defaultView变化
  watch(
    () => props.defaultView,
    (newView) => {
      currentView.value = newView
    },
    { immediate: true }
  )

  // 监听视图切换
  watch(currentView, (newView) => {
    emit('viewChange', newView)
    // 清空选择
    selectedCards.value = []
    emit('selectionChange', [])
  })

  // 获取项目的唯一键
  const getItemKey = (item: any, index: number) => {
    return item[props.rowKey] || index
  }

  // 获取卡片标题
  const getCardTitle = (item: any) => {
    return item[props.cardTitleField] || `项目 ${item[props.rowKey] || ''}`
  }

  // 获取字段值
  const getFieldValue = (item: any, prop: string) => {
    return item[prop] || '--'
  }

  // 处理表格选择变化
  const handleSelectionChange = (selection: any[]) => {
    emit('selectionChange', selection)
  }

  // 处理分页大小变化
  const handleSizeChange = (size: number) => {
    emit('sizeChange', size)
  }

  // 处理当前页变化
  const handleCurrentChange = (current: number) => {
    emit('currentChange', current)
  }

  // 判断卡片是否被选中
  const isCardSelected = (item: any) => {
    return selectedCards.value.some((selected) => selected[props.rowKey] === item[props.rowKey])
  }

  // 处理卡片选择
  const handleCardSelect = (item: any, checked: boolean) => {
    if (checked) {
      if (!isCardSelected(item)) {
        selectedCards.value.push(item)
      }
    } else {
      selectedCards.value = selectedCards.value.filter(
        (selected) => selected[props.rowKey] !== item[props.rowKey]
      )
    }
    emit('selectionChange', selectedCards.value)
  }

  // 处理卡片点击
  const handleCardClick = (item: any) => {
    if (props.showCardSelection) {
      const isSelected = isCardSelected(item)
      handleCardSelect(item, !isSelected)
    }
  }

  // 暴露方法
  defineExpose({
    tableRef,
    currentView: readonly(currentView),
    selectedCards: readonly(selectedCards)
  })
</script>

<style lang="scss" scoped>
  .art-data-viewer {
    overflow: visible;
    width: 100%;

    .viewer-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
      padding: 16px 0;

      .header-left {
        flex: 1;
      }

      .header-right {
        display: flex;
        align-items: center;
        gap: 12px;
      }
    }

    .table-view {
      // 表格视图样式继承ArtTable
    }

    .descriptions-view {
      overflow: visible;

      .descriptions-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(480px, 1fr));
        gap: 16px;
        margin-bottom: 20px;
        width: 100%;
        min-height: 0;

        .description-card {
          border-radius: 8px;
          cursor: pointer;
          transition: all 0.3s ease;
          position: relative;

          &.selected {
            border: 1px solid var(--el-color-primary);
          }

          // 字段内容样式 - 允许自然换行
          .field-content {
            word-wrap: break-word;
            word-break: break-all;
            line-height: 1.5;
          }

          // 针对描述列表的特殊处理
          :deep(.el-descriptions) {
            .el-descriptions__body {
              .el-descriptions__table {
                table-layout: auto;

                .el-descriptions__cell {
                  &.is-bordered-label {
                    width: v-bind('props.labelWidth');
                    word-wrap: break-word;
                    vertical-align: top;
                    min-width: v-bind('props.labelWidth');
                  }

                  &.is-bordered-content {
                    vertical-align: top;

                    .el-descriptions__content {
                      word-wrap: break-word;
                      word-break: break-all;
                      line-height: 1.5;
                    }
                  }
                }
              }
            }
          }
        }
      }

      .descriptions-pagination {
        display: flex;
        justify-content: center;
        margin-top: 20px;
      }

      // 响应式调整
      @media (max-width: 768px) {
        .descriptions-grid {
          grid-template-columns: 1fr;
          gap: 12px;
        }

        .description-card {
          :deep(.el-card__body) {
            padding: 16px;
            padding-top: 45px; // 移动端稍微减少顶部内边距
          }

          :deep(.el-descriptions) {
            .el-descriptions__header {
              margin-bottom: 12px;
            }
          }
        }
      }
    }

    // 深色模式适配
    html.dark & {
      .descriptions-view {
        .description-card {
          border-color: var(--el-border-color-dark);
        }
      }
    }
  }
</style>
