<template>
  <div>
    <div class="treebox-header">
      <el-input
        :placeholder="$t('Student.alumnustree.5204ag430hc0')"
        v-model="filterTree"
        size="mini"
        clearable
      >
        <el-select
          v-if="tags && tags.length > 0"
          v-model="tagIds"
          slot="prepend"
          multiple
          collapse-tags
          :placeholder="$t('Student.alumnustree.5204ag431gw0')"
        >
          <el-option
            v-for="item in tags"
            :key="item.Id"
            :label="item.Name"
            :value="item.Id"
          >
          </el-option>
        </el-select>
      </el-input>
    </div>
    <div class="treebox-content">
      <el-tree
        v-if="treeNodeData"
        ref="tree"
        node-key="value"
        :data="treeNodeData"
        :check-strictly="checkStrictly"
        :check-on-click-node="true"
        :expand-on-click-node="false"
        :filter-node-method="filterNode"
        @check-change="nodeClick"
        :highlight-current="true"
        :show-checkbox="showCheckbox"
      >
        <span class="custom-tree-node" slot-scope="{ node, data }">
          <span v-if="data.icon" style="margin-right:10px;"
            ><i :class="data.icon"
          /></span>
          <span>{{ node.label }}</span>
          <span style="margin-left:10px;">({{ data.notes }})</span>
        </span>
      </el-tree>
    </div>
  </div>
</template>

<script>
export default {
  name: "alumnustree",
  props: {
    value: { required: true },
    valueType: { type: Number, default: 0 }, //0 只选择用户 1混合选择
    multiple: Boolean,
    visible: { type: Boolean, default: false },
    closeTag: { default: null },
    treeData: { default: null },
    tags:{default:null},
      tagDict:{default:null}
  },
  data() {
    return {
      title: this.$t('Student.alumnustree.5204ag431ok0'),
      filterTree: "",
      defaultExpandedKeys: [],
      treeNodeData: null,
      tagIds:null
    };
  },
  computed: {
    checkStrictly() {
      if (this.multiple) {
        return false;
      } else {
        return true;
      }
    },
    showCheckbox() {
      if (this.multiple) {
        return true;
      } else {
        return false;
      }
    }
  },
  methods: {
    deepClone(obj) {
      var _obj = JSON.stringify(obj),
        objClone = JSON.parse(_obj);
      return objClone;
    },
    filterNode(value, data) {
      if(this.tagIds && this.tagIds.length>0){
        if(!this.filterTags(data.id)){
          return false
        }
      }
      if (!value) return true
      return data.label.includes(value)
    },
    filterTags(itemId) {
      if (this.tagIds.length == 0) {
        return true;
      }
      if (!this.tagDict[itemId]) {
        return false;
      }
      let refObjectTagIds = this.tagDict[itemId];
      for (let i = 0; i < refObjectTagIds.length; i++) {
        const refObjectTagId = refObjectTagIds[i];

        if (this.tagIds.indexOf(refObjectTagId) > -1) {
          return true;
        }
      }
      return false;
    },
    addChildrenTag(childrens) {
      console.log(childrens);
      let chickChildrens = childrens.filter(item => {
        return this.$refs.tree.getCheckedKeys().includes(item.id);
      });
      chickChildrens.forEach(data => {
        let index = this.value.findIndex(value => value == data.id);
        if (index == -1) {
          this.value.push(data.id);
        }
      });
    },
    parentIsChecked(parentId) {
      return (
        this.$refs.tree.getCheckedKeys().findIndex(key => key == parentId) > -1
      );
    },
    deleteChildrenTag(childrens) {
      console.log(childrens);
      childrens.forEach(data => {
        let index = this.value.findIndex(value => value == data.id);
        if (index > -1) {
          this.value.splice(index, 1);
        }
      });
    },
    nodeClick(data, checked, indeterminate) {
      if (this.multiple) {
        let index = this.value.findIndex(value => value == data.id);
        if (!checked) {
          if (index > -1) {
            this.value.splice(index, 1);
          }
          if (indeterminate) {
            this.addChildrenTag(data.children);
          }
        } else {
          if (this.parentIsChecked(data.parentId)) {
            this.deleteChildrenTag(data.children);
            return;
          }
          if (index == -1) {
            // this.value.push(data.id)
            this.value.push({
              Id: data.id,
              Label: data.label,
              Type: data.type,PhotoImageUrl:data.photoImageUrl
            });
            this.deleteChildrenTag(data.children);
          }
        }
      } else {
        if (this.value.length > 0) {
          this.value.splice(0, 1, {
            Id: data.id,
            Label: data.label,
            Type: data.type,PhotoImageUrl:data.photoImageUrl
          });
        } else {
          this.value.push({ Id: data.id, Label: data.label, Type: data.type,PhotoImageUrl:data.photoImageUrl });
        }
      }
    },
    getTreeData(studentData) {
      console.log(studentData);

      let valueType = this.valueType;
      let buildStudentNode = function(parentId, nodes) {
        studentData
          .filter(student => {
            return student.Status === 2;
          })
          .forEach(student => {
            let studentId =
              valueType == 0 ? student.Id : `student_${student.Id}`;
            let userNode = {
              id: studentId,
              label: student.Name,
              icon: "el-icon-user",
              parentId: parentId,
              photoImageUrl:student.photoImageUrl,
              children: []
            };
            nodes.push(userNode);
          });
      };

      let nodeData = [];
      buildStudentNode(0, nodeData);

      return nodeData;
    }
  },
  mounted() {
    this.treeNodeData = this.treeData;
    this.$nextTick(() => {
      this.$refs.tree.filter(this.filterTree);
      this.value.forEach(val => {
        this.$refs.tree.setChecked(val, true, true);
      });
    });
  },
  watch: {
    closeTag: {
      handler(val) {
        if (val) {
          if (this.multiple) {
            this.$refs.tree.setChecked(`${val.Type}_${val.Id}`, false, true);
          }
        }
      },
      deep: true
    },
    filterTree(val) {
      console.log(val);
      if (this.$refs.tree) {
        this.$refs.tree.filter(val);
      }
    },
    tagIds(val) {
      console.log(val);
      if (this.$refs.tree) {
        this.$refs.tree.filter(this.filterTree);
      }
    }
  }
};
</script>
