/**
 * 选中多个组件进行组合
 */
import { mapMutations, mapState } from 'vuex'
let isMac = false
if (window && window.navigator && window.navigator.userAgent) {
  isMac = window.navigator.userAgent.indexOf('Mac') > -1
}
export default {
  computed: {
    ...mapState({
      activeCodes: (state) => state.bigScreen.activeCodes,
      activeChart: (state) => state.bigScreen.activeItemConfig
    })
  },
  mounted () {
    // 监听shift键的按下和抬起
    document.addEventListener('keydown', this.keydown)
    document.addEventListener('keyup', this.keyup)
  },
  beforeDestroy () {
    document.removeEventListener('keydown', this.keydown)
    document.removeEventListener('keyup', this.keyup)
  },
  methods: {
    ...mapMutations('bigScreen', {
      changeCtrlOrCommandDown: 'changeCtrlOrCommandDown',
      changeActivePos: 'changeActivePos',
      deleteItem: 'delItem',
      undoTimeLine: 'undoTimeLine',
      copyCharts: 'copyCharts',
      pasteCharts: 'pasteCharts'
    }),
    keydown (event) {
      // ctrl/command + s保存
      if ((event.ctrlKey || event.metaKey) && event.keyCode === 83) {
        // 关闭默认事件
        event.preventDefault()
        this.$refs.PageTopSetting.save('saveLoading')
      }
      // ctrl/command + z撤销
      if ((event.ctrlKey || event.metaKey) && !event.shiftKey && event.keyCode === 90) {
        event.preventDefault()
        this.undoTimeLine(true)
      }

      // ctrl/command + shift + z 反撤销
      if ((event.ctrlKey || event.metaKey) && event.shiftKey && event.keyCode === 90) {
        event.preventDefault()
        this.undoTimeLine(false)
      }
      if (isMac) {
        // 是否按下了command键
        if (event.metaKey) {
          this.changeCtrlOrCommandDown(true)
        }
      } else {
        // 是否按下了ctrl键
        if (event.ctrlKey) {
          this.changeCtrlOrCommandDown(true)
        }
      }
    },
    keyup (event) {
      // 判断mac系统还是windows系统
      if (isMac) {
        // 是否按下了command键
        if (!event.metaKey) {
          this.changeCtrlOrCommandDown(false)
        }
      } else {
        // 是否按下了ctrl键
        if (!event.ctrlKey) {
          this.changeCtrlOrCommandDown(false)
        }
      }
    },
    designKeydown (event) {
      if (event.keyCode === 37) {
        // 关闭默认事件
        event.preventDefault()
        // 左箭头键被按下
        this.changeActivePos({ diffX: -1, diffY: 0 })
      } else if (event.keyCode === 38) {
        // 关闭默认事件
        event.preventDefault()
        // 上箭头键被按下
        this.changeActivePos({ diffX: 0, diffY: -1 })
      } else if (event.keyCode === 39) {
        // 关闭默认事件
        event.preventDefault()
        // 右箭头键被按下
        this.changeActivePos({ diffX: 1, diffY: 0 })
      } else if (event.keyCode === 40) {
        // 关闭默认事件
        event.preventDefault()
        // 下箭头键被按下
        this.changeActivePos({ diffX: 0, diffY: 1 })
      }
      // 删除键被按下且鼠标没有在输入框中
      if (
        (event.keyCode === 8 || event.keyCode === 46) &&
        !event.target.classList.contains('el-input__inner')
      ) {
        // 关闭默认事件
        event.preventDefault()
        this.$confirm('确定删除该组件吗？', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
          customClass: 'bs-el-message-box'
        }).then(() => {
          // 批量删除
          if (Array.isArray(this.activeCodes) && this.activeCodes.length > 0) {
            this.deleteItem(this.activeCodes)
          } else {
            // 单个删除
            this.deleteItem(this.activeChart)
          }
        }).catch(() => {})
      }
      // ctrl/command + c复制
      if ((event.ctrlKey || event.metaKey) && event.keyCode === 67) {
        this.copyCharts()
      }

      if ((event.ctrlKey || event.metaKey) && event.keyCode === 86) {
        // 粘贴
        this.pasteCharts()
      }
    }
  }
}