<template>
  <div>
    <!-- <button @click="addNode">Add Node</button> -->
    <vue-tree-list
      class="vue-tree-list"
      @click="onClick"
      @change-name="onChangeName"
      @delete-node="onDel"
      @add-node="onAddNode"
      :model="dataTree"
      default-tree-node-name="new node"
      default-leaf-node-name="new leaf"
      v-bind:default-expanded="true"
      ref="treee"
    >
      <!-- <div v-slot:leafNameDisplay="slotProps">
        <span>
          {{ slotProps.model[titleKey] }}

          <span v-if="slotProps.model.count" class="muted"
            >#{{ slotProps.model.count }}</span
          >
        </span>
      </div> -->
      <!-- <span class="icon" slot="addTreeNodeIcon">📂</span>
      <span class="icon" slot="addLeafNodeIcon">＋</span>
      <span class="icon" slot="editNodeIcon">📃</span>
      <span class="icon" slot="delNodeIcon">✂️</span>
      <span class="icon" slot="leafNodeIcon">🍃</span>
      <span class="icon" slot="treeNodeIcon">🌲</span> -->
      <span class="icon1" slot="treeNodeIcon">
        <div
          style="
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: black;
          "
        ></div>
      </span>
    </vue-tree-list>
    <!-- <button @click="getNewTree">Get new tree</button>
    <pre>
      {{ newTree }}
    </pre> -->
  </div>
</template>

<script>
import { VueTreeList, Tree, TreeNode } from "vue-tree-list";
export default {
  props: {
    parentName: {
      default: "Thing",
    },
    titleKey: {
      default: "title",
    },
    treeItems: {
      default() {
        return [];
      },
    },
  },

  data() {
    return {
      // newTree: {},
      dicTreePath: {},
      dataTree: new Tree([
        {
          id: "Thing",
          value: "Thing",
        },
      ]),
    };
  },
  // mounted() {
  //   data= new Tree(this.treeItems);
  // },
  watch: {
    treeItems(newList) {
      // this.dicTreePath = {};
      // this.dataTree.children = newVal;

      // this.dataTree.children.forEach((element,index) => {
      //   this.dicTreePath['parent'] = 'Thing';
      // });

      newList.forEach((element, index) => {
        const nodeModel = {
          children: null,
          id: index,
          isLeaf: false,
          parent: this.parentName,
          pid: this.parentName,
          value: element.value,
          name: element.value,
        };
        var node = new TreeNode(nodeModel);

        // todo: find the parent and add new children into it.
        // this.dataTree.children

        if (!this.dataTree.children && !this.dataTree.children[0])
          this.dataTree.children[0].children = [];
        this.dataTree.children[0].addChildren(node);
      });
    },
  },
  methods: {
    onDel(node) {
      console.log(node);
      node.remove();
      this.$emit("on-delete-node", node);
    },

    onChangeName(params) {
      console.log(params);
      this.$emit("on-change-name", params);
    },

    onAddNode(params) {
      console.log(params);
      this.$emit("on-add-node", params);
    },

    onClick(params) {
      console.log(params);
      this.$emit("on-click", params);
    },

    addNode(item) {
      var node = new TreeNode({ item: item, isLeaf: false });
      if (!this.dataTree.children) this.dataTree.children = [];
      this.dataTree.addChildren(node);
    },
    updateChildren(element, childs) {
      var parent = this.dataTree;
      if (element.parent != null) parent = element.parent;

      const index = parent.children.findIndex(
        (item) => item.keyId === element.keyId
      );
      if (index !== -1) {
        parent.children[index].children = childs;
      }
    },
    getNewTree() {
      var vm = this;
      function _dfs(oldNode) {
        var newNode = {};

        for (var k in oldNode) {
          if (k !== "children" && k !== "parent") {
            newNode[k] = oldNode[k];
          }
        }

        if (oldNode.children && oldNode.children.length > 0) {
          newNode.children = [];
          for (var i = 0, len = oldNode.children.length; i < len; i++) {
            newNode.children.push(_dfs(oldNode.children[i]));
          }
        }
        return newNode;
      }

      vm.newTree = _dfs(vm.dataTree);
    },
  },
};
</script>

<style lang="scss">
.vtl-node-main {
  padding: 5px 1rem 5px 0 !important;

  .vtl-node-content {
    margin-right: 7px;
  }

  &.vtl-drag-disabled {
    // background-color: #d0cfcf;
    background-color: inherit !important;
  }

  &:hover {
    cursor: pointer;
    background-color: #f0f0f0 !important;
  }

  .vtl-caret {
    margin-left: 0;
    margin-right: -1rem;
    margin-top: 8px;
    transform: rotateY(180deg);
  }
}

.vtl-tree-margin {
  margin-right: 2em;
  margin-left: auto;
}

.vtl {
  .vtl-drag-disabled {
    background-color: #d0cfcf;

    &:hover {
      background-color: #d0cfcf;
    }
  }

  .vtl-disabled {
    background-color: #d0cfcf;
  }
}

.vtl {
}
</style>

<style lang="scss" scoped>
.icon {
  &:hover {
    cursor: pointer;
  }
}

.muted {
  color: gray;
  font-size: 80%;
}
</style>