<template>
  <slot name="default" />
  <el-dialog append-to-body v-model="dialog.dialogVisible" :title="dialog.dialogTitle" width="1050">
    <el-table ref="multipleTableRef" :data="tableData" border @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="序号" align="center" width="55" type="index" />
      <el-table-column label="业主" align="center">
        <template #default="scope">
          <span>{{ scope.row.residentName ? scope.row.residentName : '---' }}</span>
        </template>
      </el-table-column>
      <el-table-column label="性别" align="center">
        <template #default="scope">
          <dict-tag :options="sys_user_sex" :value="scope.row.gender"></dict-tag>
        </template>
      </el-table-column>
      <el-table-column label="手机号" align="center" prop="phone" />
      <el-table-column label="车位" align="center" prop="parkingName" />
    </el-table>

    <template #footer>
      <div class="dialog-footer flex flex-items-center flex-justify-between">
        <pagination
          style="margin-top: 0"
          layout="total, prev, pager, next, jumper"
          v-show="total > 0"
          :total="total"
          v-model:page="queryParams.pageNum"
          v-model:limit="queryParams.pageSize"
          @pagination="getlist"
        />
        <div>
          <el-button @click="conback">退出</el-button>
          <el-button type="primary" @click="confirm"> 确定 </el-button>
        </div>
      </div>
    </template>
  </el-dialog>
</template>

<script setup lang="ts">
import { getBuildinglistAPI, getHouselistAPI } from '@/api/system/house';
import { BillUserlist, queryResidentList_Cars, queryResidentList_holder } from '@/api/system/SdbBill';
import { ref, nextTick, getCurrentInstance, ComponentInternalInstance, toRefs } from 'vue';

const { proxy } = getCurrentInstance() as ComponentInternalInstance;
const { sys_user_sex } = toRefs<any>(proxy?.useDict('sys_user_sex'));

const props = defineProps({
  returnvalue: {
    type: String,
    default: 'parkingId'
  },
  titleName: {
    type: String,
    default: '选择业主'
  },
  /** 是否多选 false 单选   */
  isMultiple: {
    type: Boolean,
    default: false
  }
});

const { titleName, returnvalue } = toRefs(props);

const userid = ref([]);
// ✅ 手动设置默认值（替代 withDefaults）
const emit = defineEmits<{
  change: [value: string | number | (string | number)[] | BillUserlist | BillUserlist[]]; // 支持返回数组
}>();

const dialog = ref({
  dialogVisible: false,
  dialogTitle: titleName.value
});

const queryParams = ref({
  pageNum: 1,
  pageSize: 10
});

const multipleTableRef = ref();
const tableData = ref<BillUserlist[]>([]);
const total = ref(0);
const loading = ref(false);
const isFetching = ref(false);
// 存储选中项
const multipleSelection = ref<BillUserlist[]>([]);

const isMultiple = computed(() => props.isMultiple ?? false);

// 优化 handleUserSelection，避免重复查找
const handleUserSelection = () => {
  isFetching.value = true;
  if (!multipleTableRef.value || !tableData.value.length) {
    isFetching.value = false;
    return;
  }
  const rowsToSelect = tableData.value.filter((row) => {
    return multipleSelection.value.some((selected) => selected.parkingId === row.parkingId);
  });
  multipleTableRef.value.clearSelection();
  if (rowsToSelect.length > 0) {
    nextTick(() => {
      rowsToSelect.forEach((row) => {
        multipleTableRef.value?.toggleRowSelection(row, true);
      });
      isFetching.value = false;
    });
  } else {
    isFetching.value = false;
  }
};

// ====================== 方法 ======================

// 获取列表
function getlist() {
  isFetching.value = true; // 加锁
  loading.value = true;
  queryResidentList_Cars(queryParams.value)
    .then((res) => {
      tableData.value = res.rows;
      total.value = res.total;
      handleUserSelection();
    })
    .catch((error) => {
      console.error('获取用户列表失败:', error);
    })
    .finally(() => {
      loading.value = false;
      isFetching.value = false; // 加锁
    });
}

/** 楼栋列表 */
const buildinglist = ref([]);
/** 房屋列表 */
const unitlist = ref([]);

/** 筛选房屋类型 */
function handleChangeHouse(val: string) {
  getBuildinglistAPI().then((res) => {
    buildinglist.value = res.data;
  });
}
/** 单元列表 */
function handleChangebuilding(val: string) {
  getHouselistAPI(val).then((res) => {
    unitlist.value = res.data.units;
  });
}

// ==============================================
// ✅ 新增：处理 selection-change（多选专用）
// ==============================================
function handleSelectionChange(selection: BillUserlist[]) {
  if (isFetching.value) return;
  if (isMultiple.value) {
    const currentSelectedIds = new Set(selection.map((item) => item.parkingId));
    const otherPageSelections = multipleSelection.value.filter((item) => {
      const isCurrentPageItem = tableData.value.some((row) => row.parkingId === item.parkingId);
      if (isCurrentPageItem) {
        return currentSelectedIds.has(item.parkingId);
      } else {
        return true;
      }
    });
    // 3. 合并：其他页保留的 + 当前页新选中的
    const finalSelection = [...otherPageSelections, ...selection];
    // 4. 去重（以防万一）
    const uniqueMap = new Map();
    finalSelection.forEach((item) => uniqueMap.set(item.parkingId, item));
    multipleSelection.value = Array.from(uniqueMap.values());
    console.log(multipleSelection.value.map((item) => item.parkingId));
  } else {
    // --- 单选逻辑 ---
    if (selection.length > 0) {
      const lastSelected = selection[selection.length - 1];
      multipleSelection.value = [lastSelected];
      nextTick(() => {
        if (selection.length > 1) {
          multipleTableRef.value?.clearSelection();
          multipleTableRef.value?.toggleRowSelection(lastSelected, true);
        }
      });
    } else {
      multipleSelection.value = [];
    }
  }
}
// ==============================================
// 最佳单选方案：点击行选中，无报错、无循环、最稳定
// ==============================================
// 优化 handleRowClick，避免重复
function handleRowClick(row: BillUserlist) {
  if (!multipleTableRef.value) return;

  if (isMultiple.value) {
    const index = multipleSelection.value.findIndex((item) => item.parkingId === row.parkingId);
    if (index > -1) {
      // 取消选中
      multipleSelection.value.splice(index, 1);
      multipleTableRef.value?.toggleRowSelection(row, false);
    } else {
      // 选中
      multipleSelection.value.push(row);
      multipleTableRef.value?.toggleRowSelection(row, true);
    }
  } else {
    // 【单选模式】先清空，再选中当前行
    multipleSelection.value = [];
    multipleTableRef.value.clearSelection();
    multipleSelection.value = [row];
    multipleTableRef.value.toggleRowSelection(row, true);
  }
}
// 重置查询
function resetQuery() {
  queryParams.value = {
    pageNum: 1,
    pageSize: 10
  };
  getlist();
}

// 退出
function conback() {
  dialog.value.dialogVisible = false;
  resetQuery();
}

// ==============================================
// ✅ 核心修改：根据 returnvalue 返回对应的值
// ==============================================
function confirm() {
  dialog.value.dialogVisible = false;
  if (isMultiple.value) {
    // 多选
    if (returnvalue.value === '*') {
      // ✅ 返回整个对象数组
      emit('change', multipleSelection.value);
    } else {
      // 返回指定字段数组
      emit(
        'change',
        multipleSelection.value.map((item) => item[returnvalue.value as keyof BillUserlist])
      );
    }
  } else {
    // 单选
    if (returnvalue.value === '*') {
      // ✅ 返回整个对象
      emit('change', multipleSelection.value[0]);
    } else {
      // 返回指定字段
      emit('change', multipleSelection.value[0][returnvalue.value as keyof BillUserlist]);
    }
  }

  multipleSelection.value = [];
  multipleTableRef.value.clearSelection();
}

defineExpose({
  open: (arr: string[] = []) => {
    userid.value = arr;
    if (arr && arr.length > 0) {
      multipleSelection.value = arr.map(
        (id) =>
          ({
            parkingId: id
          }) as BillUserlist
      );
      console.log(multipleSelection.value);
    } else {
      multipleSelection.value = [];
    }
    getlist();
    dialog.value.dialogVisible = true;
  }
});
</script>

<style scoped lang="scss">
.residentBox {
  width: 385px;
  height: 35px;
  line-height: 35px;
  border: 1px solid #ccc;
  border-radius: 5px;
  padding: 0 10px;
  .defaultbox {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  cursor: pointer;
  &:hover {
    background-color: #f4f8ff;
  }
}
</style>
