<template>
  <slot v-if="$slots.default" />

  <div v-else class="residentBox" @click="choiceResidentFun">
    <div class="defaultbox" v-if="multipleSelection.length === 0 && props.username === null">
      <span>请选择</span>
      <el-icon><Search /></el-icon>
    </div>
    <div v-else class="overflow-auto overflow-hidden w-full text-ellipsis text-nowrap">
      <span>姓名：{{ multipleSelection[0]?.nickName ?? props.username }}</span>
    </div>
  </div>

  <el-dialog append-to-body v-model="dialog.dialogVisible" :title="dialog.dialogTitle" width="1050">
    <nav class="flex flex-items-center mb-8">
      <div class="flex flex-items-center">
        <div style="width: 70px; text-align: right; padding-right: 10px">员工姓名</div>
        <div class="mr-5 flex-1">
          <el-input style="width: 170px" clearable v-model="queryParams.nickName" placeholder="请输入员工姓名" />
        </div>
      </div>
      <div class="flex flex-items-center">
        <div style="width: 70px; text-align: right; padding-right: 10px">手机号</div>
        <div class="mr-5 flex-1">
          <el-input style="width: 170px" clearable v-model="queryParams.phonenumber" placeholder="请输入手机号" />
        </div>
      </div>
      <div>
        <el-button type="primary" @click="getlist">查询</el-button>
        <el-button @click="resetQuery">重置</el-button>
      </div>
    </nav>
    <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="姓名" align="center" prop="nickName" />
      <el-table-column label="性别" align="center" width="85" prop="sex">
        <template #default="{ row }">
          <dict-tag :options="sys_user_sex" :value="row.sex" />
        </template>
      </el-table-column>
      <el-table-column label="角色" align="center" prop="roleName" />
      <el-table-column label="手机号码" align="center" prop="phonenumber" />
    </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 { ResidentVO } from '@/api/system/resident/type';
import { getUserByRoleKey } from '@/api/system/user';
import { ref, watch, nextTick, getCurrentInstance, ComponentInternalInstance, toRefs } from 'vue';

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

interface tableType extends ResidentVO {
  housePath?: string;
}

const props = defineProps({
  userid: {
    type: String,
    default: ''
  },
  username: {
    type: String,
    default: null
  },
  returnvalue: {
    type: String,
    default: 'userId'
  },
  titleName: {
    type: String,
    default: '选择维修人员'
  },
  userType: {
    type: String,
    default: 'repair'
  },
  isMultiple: {
    type: Boolean,
    default: false
  }
});

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

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

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

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

const multipleTableRef = ref();
const tableData = ref<tableType[]>([]);
const total = ref(0);
const loading = ref(false);
const isFetching = ref(false); // 加锁，防止重复触发 selection-change

// 存储选中项
const multipleSelection = ref<tableType[]>([]);

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

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

// 监听
// 监听优化：只在 userid 变化时触发
watch(userid, handleUserSelection, { immediate: true });
// watch(tableData, () => {
//   if (userid.value) handleUserSelection(); // 仅在有 userid 时重新处理
// });

// ====================== 方法 ======================
// 打开选择框
function choiceResidentFun() {
  dialog.value.dialogVisible = true;
  multipleSelection.value = []; // 打开时清空之前的选择
  if (typeof props.userid === 'string' && props.userid.trim() !== '') {
    multipleSelection.value = [
      {
        userId: props.userid
      } as ResidentVO
    ];
  } else if (Array.isArray(props.userid)) {
    multipleSelection.value = props.userid.map((id) => ({ userId: id })) as tableType[];
  }
  getlist();
}

// 获取列表
function getlist() {
  loading.value = true;
  getUserByRoleKey(userType.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;
    });
}
// ==============================================
// ✅ 新增：处理 selection-change（多选专用）
// ==============================================
function handleSelectionChange(selection: tableType[]) {
  if (isFetching.value) return;
  if (isMultiple.value) {
    const currentSelectedIds = new Set(selection.map((item) => item.id));
    const otherPageSelections = multipleSelection.value.filter((item) => {
      const isCurrentPageItem = tableData.value.some((row) => row.id === item.id);
      if (isCurrentPageItem) {
        return currentSelectedIds.has(item.id);
      } 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.id, item));
    multipleSelection.value = Array.from(uniqueMap.values());
    console.log(multipleSelection.value.map((item) => item.id));
  } 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 = [];
    }
  }

  console.log('handleSelectionChange', selection);
}
// 重置查询
function resetQuery() {
  queryParams.value = {
    pageNum: 1,
    pageSize: 10,
    nickName: null,
    phonenumber: null
  };
  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 tableType])
      );
    }
  } else {
    // 单选
    if (returnvalue.value === '*') {
      // ✅ 返回整个对象
      emit('change', multipleSelection.value[multipleSelection.value.length - 1]);
    } else {
      // 返回指定字段
      emit('change', multipleSelection.value[multipleSelection.value.length - 1][returnvalue.value as keyof tableType]);
    }
  }
}
onMounted(() => {
  // 初始化
});

defineExpose({
  open: () => {
    dialog.value.dialogVisible = true;
    getlist();
  }
});
</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>
