<template>
  <el-dialog custom-class="custom-dialog" class="border" :border="false" closeFree width="1000px" style="height: 676px"
             :title="title" :visible.sync="visible" v-model="visible" append-to-body :close-on-click-modal="true"
             :destroy-on-close="true">
    <div class="picker">
      <div class="candidate" v-loading="loading">
        <el-input v-model="filterText" @change="getList()"
                  clearable placeholder="输入公司进行搜索">
          <template #append>
            <el-button @click="getList()">搜索</el-button>
          </template>
        </el-input>

        <fvCheckbox style="margin-left: 10px" :options="checkOptions" v-model="checkList" @change="checkBoxChange"/>
        <!-- 人员选择 -->
        <el-empty :image-size="100" description="似乎没有数据" v-show="dataList.length === 0"/>
        <el-scrollbar style="height:87%;">
          <div class="tree">
            <el-tree :data="dataList" ref="tree" :props="defaultProps" empty-text="" node-key="value"
                     :show-checkbox="showCheckbox" highlight-current default-expand-all
                     :default-checked-keys="defaultChecked" :disabled="disabled"
                     :check-strictly="!checkStrictly" @node-click="(node,check)=>handle(node,check)"
                     @check-change="handleChange" :filter-node-method="filterNode">
              <template #default="{ node, data }">
                <div class="tree-node">
                  <div style="display: flex;align-items: center;padding: 3px 0">
                    {{ node.label }}
                  </div>
                </div>
              </template>
            </el-tree>
          </div>
        </el-scrollbar>
      </div>
      <div class="selected">
        <div class="count">
          <span>已选 {{ selectList.length }} 项</span>
          <span @click="clearSelected">清空</span>
        </div>
        <div class="org-items">
          <el-empty :image-size="100" description="请点击左侧列表选择数据" v-show="selectList.length === 0"/>
          <div v-for="(selectItem, selectIndex) in selectList" :key="selectIndex" class="org-item">
            {{ selectItem.label }}
            <el-icon @click="noSelected(selectItem)" size="20" style="margin-left: 10px;cursor: pointer;">
              <CircleClose/>
            </el-icon>
          </div>
        </div>
      </div>
    </div>
    <div class="footer">
      <el-button size="mini" @click="visible = false">取 消</el-button>
      <el-button size="mini" color="#DED0B2" @click="selectConfirm">确 定</el-button>
    </div>
  </el-dialog>
</template>

<script setup>
import {ElMessageBox} from "element-plus";
import {getSubCompOpt} from "@/api/user/user";

const checkList = ref(['1'])
const checkStrictly = ref(false)
const isExpand = ref('展开')
const expandedKeys = ref(['-1']);
const checkOptions = ref([
  {
    label: isExpand.value,
    value: '1'
  },
  {
    label: '父子联动',
    value: '2'
  },
])
const props = defineProps({
  value: {
    type: Array,
    default: () => {
      return [];
    }
  },
  multiple: { //是否多选
    default: true,
    type: Boolean
  },
  showCheckbox: { //是否显示左侧选择框
    default: true,
    type: Boolean
  }
});
const isChooseAll = ref(true);
let selectItem = reactive({
  type: -1,
  value: "0"
});
const visible = ref(false);
const loading = ref(false);
const title = ref("请选择");
const selectList = ref([]);
const filterText = ref("");
const dataList = ref([]);
const defaultChecked = ref([]);
const tree = ref([]);
const defaultProps = {
  value: "value",
  label: "label",
  children: "children",
  disabled: "disabled",
};
const emit = defineEmits();
const _value = computed({
  get() {
    return props.value;
  },
  set(val) {
    emit("input", val);
  }
});

watch(() => filterText.value, (newVal) => {
  tree.value.filter(newVal);
});
const checkBoxChange = (val) => {
  checkStrictly.value = val.includes('2')
  let nodes = tree.value.store.nodesMap
  if (val.includes('1')) {
    for (const node in nodes) {
      nodes[node].expanded = true;
    }
    isExpand.value = '折叠'
  } else {
    for (const node in nodes) {
      nodes[node].expanded = false;
    }
    isExpand.value = '展开'
  }
}
const matterTree = (list, flag) => {
  list.forEach(item => {
    if (!flag&&item.value!==-1) {
      tree.value.setChecked(item, false)
    }
    if (item.children !== undefined) {
      matterTree(item.children)
    }
  })
}
// const cancelAll = () => {
//   isChooseAll.value = true
//   tree.value.setCheckedNodes([])
// }
// const chooseAll = () => {
//   isChooseAll.value = false
//   matterTree(dataList.value)
// }
const getList = () => {
  getSubCompOpt().then(res => {
    dataList.value = [
      {
        label: "全选",
        value: -1,
        children: res.data
      }
    ]
  });
};

//通过关键字过滤树节点
const filterNode = (value, data) => {
  //通过关键字过滤树节点
  if (!value) return true;
  return data.label.indexOf(value) !== -1;
};
//用于用户选择
const show = () => {
  //用于弹开部门选择
  visible.value = true;
  selectList.value = _value.value
  defaultChecked.value = _value.value.map(item => item.value)
  getList()
};
const handleChange = (data, checked) => {
  if (data.value == -1&&checked) {
    // tree.value.setCheckedNodes(['-1'])
    matterTree(dataList.value, false)
    // return;
  }
  // 左侧有选择框 + 多选
  if (props.multiple) {
    //不添加重复的数据到右边
    for (let i = 0; i < selectList.value.length; i++) {
      if (selectList.value[i].value === data.value) {
        selectList.value.splice(i, 1);
        break;
      }
    }
    if (checked) {
      // if (data.children === undefined) {
      selectList.value.push(data);
      // }
    } else if (data === "1") {
      tree.value.setCheckedKeys([]);
      selectList.value = [];
    }
  } else {// 左侧有选择框 + 单选
    //不添加重复的数据到右边
    for (let i = 0; i < selectList.value.length; i++) {
      if (selectList.value[i].value === data.value) {
        selectList.value.splice(i, 1);
        break;
      }
    }
    if (checked) {
      tree.value.setCheckedNodes([data]);
      selectList.value = [data];
    } else if (data === "1") {
      selectList.value = [];
      tree.value.setCheckedKeys([]);
    }
  }
};
const handle = (node, check) => {
  if (check.isLeaf !== false) {
    if (props.multiple) {
      //不添加重复的数据到右边
      for (let i = 0; i < selectList.value.length; i++) {
        if (selectList.value[i].value === node.value) {
          selectList.value.splice(i, 1);
          break;
        }
      }
      check.checked = true;
      selectList.value.push(node);
    } else {
      check.checked = true;
      selectList.value = [node];
    }
  }
  // _value.value = selectList.value
};
const noSelected = (selectItem) => {
  //左侧无选择框时,右侧显示×
  for (let i = 0; i < selectList.value.length; i++) {
    if (selectList.value[i].value === selectItem.value) {
      tree.value.setChecked(selectList.value[i].value, false);
      selectList.value.splice(i, 1);
      break;
    }
  }
  if (props.showCheckbox) {
    // 左侧有选择框 + 单选
    if (props.multiple === false) {
      tree.value.setCheckedKeys([]);
    }
  }
};
const clearSelected = () => {
  //清空
  ElMessageBox.confirm("您确定要清空已选中的项?", "提示", {
    confirmButtonText: "确定",
    cancelButtonText: "取消",
    type: "warning"
  }).then(() => {
    if (!props.showCheckbox) {
      selectList.value = [];
    } else {
      handleChange("1");
    }
  });
};
const selectConfirm = () => {
  //确定按钮
  emit("ok", selectList.value);
  dataList.value = []
  visible.value = false;
};
defineExpose({
  show
});
getList()
</script>

<style lang="scss" scoped>
$containWidth: 480px;
:deep(.tree) {
  .el-tree-node__content {
    height: 34px;

    .tree-node {
      font-size: 18px;
    }
  }

  //.el-tree-node {
  //  .is-leaf + .el-checkbox .el-checkbox__inner {
  //    display: inline-block;
  //  }
  //
  //  .el-checkbox .el-checkbox__inner {
  //    display: none;
  //  }
  //}
}

.footer {
  float: right;
  margin-top: 10px;
}

.picker {
  height: 560px;
  position: relative;
  text-align: left;

  .candidate {
    position: absolute;
    display: block;
    width: $containWidth;
    height: 100%;
    border: 1px solid #e8e8e8;

    :deep(.el-input) {
      height: 40px;

      .el-input__inner, .el-input-group__append {
        font-size: 16px;
      }
    }
  }

  .selected {
    right: 0;
    top: 0;
    position: absolute;
    display: inline-block;
    width: 450px;
    height: 100%;
    border: 1px solid #e8e8e8;

    .count {
      width: 100%;
      padding: 10px;
      display: inline-block;
      border-bottom: 1px solid #e8e8e8;
      margin-bottom: 5px;
      font-size: 16px;

      > span:nth-child(2) {
        float: right;
        color: #c75450;
        cursor: pointer;
        margin-left: 10px;
      }
    }

    .org-items {
      overflow-y: auto;
      height: 90%;

      .el-icon-close {
        position: absolute;
        right: 5px;
        cursor: pointer;
        font-size: larger;
      }

      .org-item {
        margin: 0 5px;
        border-radius: 5px;
        position: relative;
        padding: 7px 5px;
        display: flex;
        align-items: center;
        font-size: 16px;

        &:hover {
          background: #f1f1f1;
        }

        > span {
          margin-left: 5px;
        }
      }
    }

  }

}

.el-scrollbar .el-scrollbar__wrap {
  overflow-x: hidden;
}

::-webkit-scrollbar {
  float: right;
  width: 4px;
  height: 4px;
  background-color: white;
}

::-webkit-scrollbar-thumb {
  border-radius: 16px;
  background-color: #efefef;
}

</style>
