<script lang="ts" setup>
import type { MallSeckillActivityApi } from '#/api/mall/promotion/seckill/seckillActivity';

import { onMounted, ref } from 'vue';

import { ContentWrap } from '@vben/common-ui';
import { DICT_TYPE } from '@vben/constants';
import { getDictOptions } from '@vben/hooks';
import { IconifyIcon } from '@vben/icons';
import {
  dateFormatter,
  fenToYuan,
  fenToYuanFormat,
  formatDate,
  handleTree,
} from '@vben/utils';

import { CHANGE_EVENT } from 'element-plus';

import * as ProductCategoryApi from '#/api/mall/product/category';
import * as SeckillActivityApi from '#/api/mall/promotion/seckill/seckillActivity';

/**
 * 活动表格选择对话框
 * 1. 单选模式：
 *    1.1 点击表格左侧的单选框时，结束选择，并关闭对话框
 *    1.2 再次打开时，保持选中状态
 * 2. 多选模式：
 *    2.1 点击表格左侧的多选框时，记录选中的活动
 *    2.2 切换分页时，保持活动的选中状态
 *    2.3 点击右下角的确定按钮时，结束选择，关闭对话框
 *    2.4 再次打开时，保持选中状态
 */
defineOptions({ name: 'SeckillTableSelect' });

defineProps({
  // 多选模式
  multiple: {
    type: Boolean,
    default: false,
  },
});

/** 确认选择时的触发事件 */
const emits = defineEmits<{
  change: [
    SeckillActivityApi:
      | any
      | MallSeckillActivityApi.SeckillActivity
      | MallSeckillActivityApi.SeckillActivity[],
  ];
}>();
// 列表的总页数
const total = ref(0);
// 列表的数据
const list = ref<MallSeckillActivityApi.SeckillActivity[]>([]);
// 列表的加载中
const loading = ref(false);
// 弹窗的是否展示
const dialogVisible = ref(false);
// 查询参数
const queryParams = ref({
  pageNo: 1,
  pageSize: 10,
  name: undefined,
  status: undefined,
});

/** 打开弹窗 */
const open = (SeckillList?: MallSeckillActivityApi.SeckillActivity[]) => {
  // 重置
  checkedActivitys.value = [];
  checkedStatus.value = {};
  isCheckAll.value = false;
  isIndeterminate.value = false;

  // 处理已选中
  if (SeckillList && SeckillList.length > 0) {
    checkedActivitys.value = [...SeckillList];
    checkedStatus.value = Object.fromEntries(
      SeckillList.map((activityVO) => [activityVO.id, true]),
    );
  }

  dialogVisible.value = true;
  resetQuery();
};
// 提供 open 方法，用于打开弹窗
defineExpose({ open });

/** 查询列表 */
const getList = async () => {
  loading.value = true;
  try {
    const data = await SeckillActivityApi.getSeckillActivityPage(
      queryParams.value,
    );
    list.value = data.list;
    total.value = data.total;
    // checkbox绑定undefined会有问题，需要给一个bool值
    list.value.forEach(
      (activityVO) =>
        (checkedStatus.value[activityVO.id || ''] =
          checkedStatus.value[activityVO.id || ''] || false),
    );
    // 计算全选框状态
    calculateIsCheckAll();
  } finally {
    loading.value = false;
  }
};

/** 搜索按钮操作 */
const handleQuery = () => {
  queryParams.value.pageNo = 1;
  getList();
};

/** 重置按钮操作 */
const resetQuery = () => {
  queryParams.value = {
    pageNo: 1,
    pageSize: 10,
    name: undefined,
    status: undefined,
  };
  getList();
};

/**
 * 格式化拼团价格
 * @param products
 */
const formatSeckillPrice = (
  products: MallSeckillActivityApi.SeckillProduct[],
) => {
  const seckillPrice = Math.min(...products.map((item) => item.seckillPrice));
  return `￥${fenToYuan(seckillPrice)}`;
};

// 是否全选
const isCheckAll = ref(false);
// 全选框是否处于中间状态：不是全部选中 && 任意一个选中
const isIndeterminate = ref(false);
// 选中的活动
const checkedActivitys = ref<MallSeckillActivityApi.SeckillActivity[]>([]);
// 选中状态：key为活动ID，value为是否选中
const checkedStatus = ref<Record<string, boolean>>({});

// 选中的活动 activityId
const selectedActivityId = ref();
/** 单选中时触发 */
const handleSingleSelected = (
  seckillActivityVO: MallSeckillActivityApi.SeckillActivity,
) => {
  emits(CHANGE_EVENT, seckillActivityVO);
  // 关闭弹窗
  dialogVisible.value = false;
  // 记住上次选择的ID
  selectedActivityId.value = seckillActivityVO.id;
};

/** 多选完成 */
const handleEmitChange = () => {
  // 关闭弹窗
  dialogVisible.value = false;
  emits(CHANGE_EVENT, [...checkedActivitys.value]);
};

/** 全选/全不选 */
const handleCheckAll = (checked: boolean) => {
  isCheckAll.value = checked;
  isIndeterminate.value = false;

  list.value.forEach((seckillActivity) =>
    handleCheckOne(checked, seckillActivity, false),
  );
};

/**
 * 选中一行
 * @param checked 是否选中
 * @param seckillActivity 活动
 * @param isCalcCheckAll 是否计算全选
 */
const handleCheckOne = (
  checked: boolean,
  seckillActivity: MallSeckillActivityApi.SeckillActivity,
  isCalcCheckAll: boolean,
) => {
  if (checked) {
    checkedActivitys.value.push(seckillActivity);
    checkedStatus.value[seckillActivity.id || ''] = true;
  } else {
    const index = findCheckedIndex(seckillActivity);
    if (index > -1) {
      checkedActivitys.value.splice(index, 1);
      checkedStatus.value[seckillActivity.id || ''] = false;
      isCheckAll.value = false;
    }
  }

  // 计算全选框状态
  if (isCalcCheckAll) {
    calculateIsCheckAll();
  }
};

// 查找活动在已选中活动列表中的索引
const findCheckedIndex = (activityVO: MallSeckillActivityApi.SeckillActivity) =>
  checkedActivitys.value.findIndex((item) => item.id === activityVO.id);

// 计算全选框状态
const calculateIsCheckAll = () => {
  isCheckAll.value = list.value.every(
    (activityVO) => checkedStatus.value[activityVO.id || ''],
  );
  // 计算中间状态：不是全部选中 && 任意一个选中
  isIndeterminate.value =
    !isCheckAll.value &&
    list.value.some((activityVO) => checkedStatus.value[activityVO.id || '']);
};

// 分类列表
const categoryList = ref();
// 分类树
const categoryTreeList = ref();
/** 初始化 */
onMounted(async () => {
  await getList();
  // 获得分类树
  categoryList.value = await ProductCategoryApi.getCategoryList({});
  categoryTreeList.value = handleTree(categoryList.value, 'id', 'parentId');
});
</script>

<template>
  <Dialog
    v-model="dialogVisible"
    :append-to-body="true"
    title="选择活动"
    width="70%"
  >
    <ContentWrap>
      <!-- 搜索工作栏 -->
      <el-form
        :inline="true"
        :model="queryParams"
        class="-mb-15px"
        label-width="68px"
      >
        <el-form-item label="活动名称" prop="name">
          <el-input
            v-model="queryParams.name"
            placeholder="请输入活动名称"
            clearable
            @keyup.enter="handleQuery"
            class="!w-240px"
          />
        </el-form-item>
        <el-form-item label="活动状态" prop="status">
          <el-select
            v-model="queryParams.status"
            placeholder="请选择活动状态"
            clearable
            class="!w-240px"
          >
            <el-option
              v-for="dict in getDictOptions(DICT_TYPE.COMMON_STATUS, 'number')"
              :key="dict.value"
              :label="dict.label"
              :value="dict.value"
            />
          </el-select>
        </el-form-item>
        <el-form-item>
          <el-button @click="handleQuery">
            <IconifyIcon class="mr-5px" icon="ep:search" />
            搜索
          </el-button>
          <el-button @click="resetQuery">
            <IconifyIcon class="mr-5px" icon="ep:refresh" />
            重置
          </el-button>
        </el-form-item>
      </el-form>
      <el-table v-loading="loading" :data="list" show-overflow-tooltip>
        <!-- 1. 多选模式（不能使用type="selection"，Element会忽略Header插槽） -->
        <el-table-column width="55" v-if="multiple">
          <template #header>
            <el-checkbox
              v-model="isCheckAll"
              :indeterminate="isIndeterminate"
              @change="handleCheckAll"
            />
          </template>
          <template #default="{ row }">
            <el-checkbox
              v-model="checkedStatus[row.id]"
              @change="(checked: boolean) => handleCheckOne(checked, row, true)"
            />
          </template>
        </el-table-column>
        <!-- 2. 单选模式 -->
        <el-table-column label="#" width="55" v-else>
          <template #default="{ row }">
            <el-radio
              :value="row.id"
              v-model="selectedActivityId"
              @change="handleSingleSelected(row)"
            >
              <!-- 空格不能省略，是为了让单选框不显示label，如果不指定label不会有选中的效果 -->
              &nbsp;
            </el-radio>
          </template>
        </el-table-column>
        <el-table-column label="活动编号" prop="id" min-width="80" />
        <el-table-column label="活动名称" prop="name" min-width="140" />
        <el-table-column label="活动时间" min-width="210">
          <template #default="scope">
            {{ formatDate(scope.row.startTime, 'YYYY-MM-DD') }}
            ~ {{ formatDate(scope.row.endTime, 'YYYY-MM-DD') }}
          </template>
        </el-table-column>
        <el-table-column label="商品图片" prop="spuName" min-width="80">
          <template #default="scope">
            <el-image
              :src="scope.row.picUrl"
              class="h-40px w-40px"
              :preview-src-list="[scope.row.picUrl]"
              preview-teleported
            />
          </template>
        </el-table-column>
        <el-table-column label="商品标题" prop="spuName" min-width="300" />
        <el-table-column
          label="原价"
          prop="marketPrice"
          min-width="100"
          :formatter="fenToYuanFormat"
        />
        <el-table-column label="拼团价" prop="seckillPrice" min-width="100">
          <template #default="scope">
            {{ formatSeckillPrice(scope.row.products) }}
          </template>
        </el-table-column>
        <el-table-column label="开团组数" prop="groupCount" min-width="100" />
        <el-table-column
          label="成团组数"
          prop="groupSuccessCount"
          min-width="100"
        />
        <el-table-column label="购买次数" prop="recordCount" min-width="100" />
        <el-table-column
          label="活动状态"
          align="center"
          prop="status"
          min-width="100"
        >
          <template #default="scope">
            <dict-tag
              :type="DICT_TYPE.COMMON_STATUS"
              :value="scope.row.status"
            />
          </template>
        </el-table-column>
        <el-table-column
          label="创建时间"
          align="center"
          prop="createTime"
          :formatter="dateFormatter"
          width="180px"
        />
      </el-table>
      <!-- 分页 -->
      <Pagination
        v-model:limit="queryParams.pageSize"
        v-model:page="queryParams.pageNo"
        :total="total"
        @pagination="getList"
      />
    </ContentWrap>
    <template #footer v-if="multiple">
      <el-button type="primary" @click="handleEmitChange">确 定</el-button>
      <el-button @click="dialogVisible = false">取 消</el-button>
    </template>
  </Dialog>
</template>
