<template>
  <table v-if="treeData.name">
    <tr>
      <td
        :colspan="Array.isArray(treeData.children) ? treeData.children.length * 2 : 1"
        :class="{
          parentLevel: Array.isArray(treeData.children) && treeData.children.length,
          extend: Array.isArray(treeData.children) && treeData.children.length && treeData.extend,
        }"
      >
        <div :class="{ node: true, hasMate: treeData.mate }">
          <div
            class="person"
            :class="Array.isArray(treeData.class) ? treeData.class : []"
            @click="$emit('click-node', treeData)"
          >
            <div class="avat">
              <img :src="treeData.image_url" />
            </div>
            <div class="info-wrapper">
              <div class="name">{{ treeData.name }}|{{ treeData.title }}</div>
              <div class="studio">{{ treeData.studio }}</div>
            </div>
          </div>
          <template v-if="Array.isArray(treeData.mate) && treeData.mate.length">
            <div
              class="person"
              v-for="(mate, mateIndex) in treeData.mate"
              :key="treeData.name + mateIndex"
              :class="Array.isArray(mate.class) ? mate.class : []"
              @click="$emit('click-node', mate)"
            >
              <div class="avat">
                <img :src="mate.image_url" />
              </div>
              <div class="info-wrapper">
                <div class="name">{{ treeData.name }}|{{ treeData.title }}</div>
                <div class="studio">{{ treeData.studio }}</div>
              </div>
            </div>
          </template>
        </div>
        <div
          class="extend_handle"
          v-if="Array.isArray(treeData.children) && treeData.children.length"
          @click="toggleExtend(treeData)"
        ></div>
      </td>
    </tr>
    <tr v-if="Array.isArray(treeData.children) && treeData.children.length && treeData.extend">
      <td
        v-for="(children, index) in treeData.children"
        :key="index"
        colspan="2"
        class="childLevel"
      >
        <TreeChart :json="children" @click-node="$emit('click-node', $event)" />
      </td>
    </tr>
  </table>
</template>

<script>
  export default {
    name: 'TreeChart',
    props: ['json'],
    data() {
      return {
        treeData: {},
      }
    },
    watch: {
      json: {
        handler: function (Props) {
          let extendKey = function (jsonData) {
            jsonData.extend = jsonData.extend === void 0 ? true : !!jsonData.extend
            if (Array.isArray(jsonData.children)) {
              jsonData.children.forEach((c) => {
                extendKey(c)
              })
            }
            return jsonData
          }
          if (Props) {
            this.treeData = extendKey(Props)
          }
        },
        immediate: true,
      },
    },
    methods: {
      toggleExtend: function (treeData) {
        treeData.extend = !treeData.extend
        this.$forceUpdate()
      },
    },
  }
</script>

<style scoped>
  table {
    border-collapse: separate !important;
    border-spacing: 0 !important;
  }

  td {
    position: relative;
    vertical-align: top;
    padding: 0 0 50px 0;
    text-align: center;
  }

  .extend_handle {
    position: absolute;
    left: 50%;
    bottom: 30px;
    width: 10px;
    height: 10px;
    transform: translate3d(-6px, 0, 0);
    cursor: pointer;
  }

  .extend_handle:before {
    content: '';
    display: block;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
    border: 2px solid;
    border-color: #ccc #ccc transparent transparent;
    transform: rotateZ(135deg);
    transform-origin: 50% 50% 0;
    transition: transform ease 300ms;
  }

  .extend_handle:hover:before {
    border-color: #333 #333 transparent transparent;
  }

  .extend .extend_handle:before {
    transform: rotateZ(-45deg);
  }

  .extend::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 15px;
    height: 15px;
    border-left: 2px solid #ccc;
    transform: translate3d(-1px, 0, 0);
  }

  .childLevel::before {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 100%;
    height: 15px;
    border-left: 2px solid #ccc;
    transform: translate3d(-1px, 0, 0);
  }

  .childLevel::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: -15px;
    border-top: 2px solid #ccc;
  }

  .childLevel:first-child:before,
  .childLevel:last-child:before {
    display: none;
  }

  .childLevel:first-child:after {
    left: 50%;
    height: 15px;
    border: 2px solid;
    border-color: #ccc transparent transparent #ccc;
    border-radius: 6px 0 0 0;
    transform: translate3d(1px, 0, 0);
  }

  .childLevel:last-child:after {
    right: 50%;
    height: 15px;
    border: 2px solid;
    border-color: #ccc #ccc transparent transparent;
    border-radius: 0 6px 0 0;
    transform: translate3d(-1px, 0, 0);
  }

  .childLevel:first-child.childLevel:last-child::after {
    left: auto;
    border-radius: 0;
    border-color: transparent #ccc transparent transparent;
    transform: translate3d(1px, 0, 0);
  }

  .node {
    position: relative;
    display: inline-block;
    margin: 0 1em;
    box-sizing: border-box;
    text-align: center;
  }

  .node .person {
    position: relative;
    display: inline-block;
    z-index: 2;
    overflow: hidden;
  }

  .node .person .avat {
    position: absolute;
    left: 51px; /* 73-22 */
    display: block;
    width: 44px;
    height: 44px;
    margin: auto;
    overflow: hidden;
    background: #fff;
    border: 1px solid #ccc;
    box-sizing: border-box;
    border-radius: 50%;
  }

  .node .person .avat img {
    width: 100%;
    height: 100%;
  }

  .node .person .info-wrapper {
    margin-top: 22px;
    padding: 22px 4px 4px 4px;
    width: 146px;
    height: 92px;
    background-color: #fff;
  }

  .node .person .name {
    height: 2em;
    line-height: 2em;
    overflow: hidden;
    width: 100%;
    color: #666;
  }

  .node .person .studio {
    font-size: 12px;
    width: 100%;
    color: #999;
  }

  .node.hasMate::after {
    content: '';
    position: absolute;
    left: 2em;
    right: 2em;
    top: 2em;
    border-top: 2px solid #ccc;
    z-index: 1;
  }
  /* 横板 */
  .landscape {
    transform: translate(-100%, 0) rotate(-90deg);
    transform-origin: 100% 0;
  }

  .landscape .node {
    text-align: left;
    height: 8em;
    width: 8em;
  }

  .landscape .person {
    position: relative;
    transform: rotate(90deg);
    padding-left: 4.5em;
    height: 4em;
    top: 4em;
    left: -1em;
  }

  .landscape .person .avat {
    position: absolute;
    left: 0;
  }

  .landscape .person .name {
    height: 4em;
    line-height: 4em;
  }

  .landscape .hasMate {
    position: relative;
  }

  .landscape .hasMate .person {
    position: absolute;
  }

  .landscape .hasMate .person:first-child {
    left: auto;
    right: -4em;
  }

  .landscape .hasMate .person:last-child {
    left: -4em;
    margin-left: 0;
  }
</style>
