<template>
  <div class="home">
    <Toolbar />

    <main>
      <!-- 左侧组件列表 -->
      <!--      <section class="left">-->
      <!--        <ComponentList />-->
      <!--      </section>-->
      <!-- 中间画布 -->
      <section class="center">
        <div
          class="content"
          @drop="handleDrop"
          @dragover="handleDragOver"
          @mousedown="handleMouseDown"
          @mouseup="deselectCurComponent"
        >
          <Editor />
        </div>
      </section>

    </main>
  </div>
</template>

<script>
import Editor from '@/components/Editor/index'
import ComponentList from '@/components/ComponentList' // 左侧列表组件
import AttrList from '@/components/canvas/components/AttrList' // 右侧属性列表
import AnimationList from '@/components/canvas/components/AnimationList' // 右侧动画列表
import EventList from '@/components/canvas/components/EventList' // 右侧事件列表
import componentList from '@/components/canvas/custom-component/component-list' // 左侧列表数据
import Toolbar from '@/components/Toolbar'
import { deepCopy } from '@/utils/utils'
import { mapState } from 'vuex'
import generateID from '@/utils/generateID'
import { listenGlobalKeyDown } from '@/utils/shortcutKey'

export default {
  components: { Editor, ComponentList, AttrList, AnimationList, EventList, Toolbar },
  data() {
    return {
      activeName: 'attr',
      reSelectAnimateIndex: undefined
    }
  },
  computed: mapState([
    'componentData',
    'curComponent',
    'isClickComponent',
    'canvasStyleData'
  ]),
  created() {
    this.restore()
    // 全局监听按键事件
    listenGlobalKeyDown()
  },
  methods: {
    restore() {
      // 用保存的数据恢复画布
      if (localStorage.getItem('canvasData')) {
        this.$store.commit('setComponentData', this.resetID(JSON.parse(localStorage.getItem('canvasData'))))
      }

      if (localStorage.getItem('canvasStyle')) {
        this.$store.commit('setCanvasStyle', JSON.parse(localStorage.getItem('canvasStyle')))
      }
    },

    resetID(data) {
      if( data ) {
        data.forEach(item => {
          item.id = uuid.v1()
        })
      }

      return data
    },

    handleDrop(e) {
      e.preventDefault()
      e.stopPropagation()

      let component
      const id = e.dataTransfer.getData('componentId')
      componentList.forEach(componentTemp => {
        if (id == componentTemp.id) {
          component = deepCopy(componentTemp)
        }
      })
      // const component = deepCopy(componentList[e.dataTransfer.getData('index')])
      component.style.top = e.offsetY
      component.style.left = e.offsetX
      component.id = generateID()
      this.$store.commit('addComponent', { component })
      this.$store.commit('recordSnapshot')
    },

    handleDragOver(e) {
      e.preventDefault()
      e.dataTransfer.dropEffect = 'copy'
    },

    handleMouseDown() {
      this.$store.commit('setClickComponentStatus', false)
    },

    deselectCurComponent(e) {
      if (!this.isClickComponent) {
        this.$store.commit('setCurComponent', { component: null, index: null })
      }

      // 0 左击 1 滚轮 2 右击
      if (e.button != 2) {
        this.$store.commit('hideContextMenu')
      }
    }
  }
}
</script>

<style lang="scss">
.home {
    height: 100vh;
    background: #fff;

    main {
        height: calc(100% - 64px);
        position: relative;

        .left {
            position: absolute;
            height: 100%;
            width: 200px;
            left: 0;
            top: 0;
            padding-top: 10px;
        }

        .right {
            position: absolute;
            height: 100%;
            width: 262px;
            right: 0;
            top: 0;
        }

        .center {
            margin-left: 200px;
            margin-right: 262px;
            background: #f5f5f5;
            height: 100%;
            overflow: auto;
            padding: 20px;

            .content {
                width: 100%;
                height: 100%;
                overflow: auto;
            }
        }
    }

    .placeholder {
        text-align: center;
        color: #333;
    }
}
</style>
