<!--
 * @Author: nxy
 * @Date: 2024-08-07 13:47:07
-->
<template>
  <div class="custom-edit-align-line">
    <div
      class="line"
      v-for="item in line.lineArr"
      :key="item"
      :class="[item.includes('row') ? 'row' : 'col', line['select'].has(item) && 'visible']"
      :style="useComponentStyle(line['select'].get(item))"
    ></div>
  </div>
</template>

<script setup name="EditAlignLine">
import { reactive, computed, watch } from 'vue'
import { useChartEditStore } from '@/store/modules/chart/chartEditStore'
import { useSettingStore } from '@/store/modules/chart/settingStore'
import { setComponentPosition } from '../../utils/chart-util'
import { throttle,cloneDeep } from 'lodash-es'

const chartEditStore = useChartEditStore()
const settingStore = useSettingStore()

// * 线条集合
const line = reactive({
  // 行横向row（上中下），列竖线col（左中右）
  lineArr: ['rowt', 'rowc', 'rowb', 'coll', 'colc', 'colr'],
  // 展示线
  select: new Map(),
  // 已经吸附
  sorptioned: {
    x: false,
    y: false
  }
})

// * 位置计算
const useComponentStyle = (attr) => {
  if (!attr) return {}
  const componentStyle = {
    left: `${attr.x ? attr.x : 0}px`,
    top: `${attr.y ? attr.y : 0}px`
  }
  return componentStyle
}

// * 吸附距离
const minDistance = computed(() => {
  return settingStore.getChartAlignRange
})

// * 是否开始计算
const isComputedLine = computed(() => {
  // isDrag 移动时为 true，Drag Hook里设置
  const isDrag = chartEditStore.getEditCanvas['isDrag']
  return isDrag
})

// * 吸附判定
const isSorption = (selectValue, componentValue) => {
  const isSorption = Math.abs(selectValue - componentValue) <= minDistance.value
  return isSorption
}

// * 当前目标
const selectId = computed(() => chartEditStore.getTargetChart.selectId)
const selectTarget = computed(() => chartEditStore.getComponentList[chartEditStore.fetchTargetIndex()])
const selectAttr = computed(() => selectTarget.value?.attr || {})

// * 画布坐标
const canvasPositionList = computed(() => {
  return {
    id: '0',
    attr: {
      w: cloneDeep(chartEditStore.getEditCanvasConfig.width),
      h: cloneDeep(chartEditStore.getEditCanvasConfig.height),
      x: 0,
      y: 0,
      offsetX: 0,
      offsetY: 0,
      zIndex: 0
    }
  }
})

// * 监听鼠标移动
watch(
  () => chartEditStore.getMousePosition,
  throttle(() => {
    try {
      if (!isComputedLine.value || selectId.value.length !== 1) return
      // 获取目标组件数据

      const selectW = selectAttr.value.w
      const selectH = selectAttr.value.h

      // 距离左侧
      const selectLeftX = selectAttr.value.x
      const selectHalfX = selectLeftX + selectW / 2
      const selectRightX = selectLeftX + selectW
      const seletX = [selectLeftX, selectHalfX, selectRightX]

      // 距离顶部
      const selectTopY = selectAttr.value.y
      const selectHalfY = selectTopY + selectH / 2
      const selectBottomY = selectTopY + selectH
      const selectY = [selectTopY, selectHalfY, selectBottomY]

      line.select.clear()
      line.sorptioned.y = false
      // 循环查询所有组件数据
      const componentList = chartEditStore.getComponentList.map((e) => {
        return {
          id: e.id,
          attr: e.attr
        }
      })
      componentList.push(canvasPositionList.value)
      // 传入画布数据
      line.lineArr.forEach(lineItem => {
        componentList.forEach((component) => {
          // 排除自身
          if (selectId.value[0] === component.id) return
          const componentW = component.attr.w
          const componentH = component.attr.h

          // 距离左侧
          const componentLeftX = component.attr.x
          const componentHalfX = componentLeftX + componentW / 2
          const componentRightX = componentLeftX + componentW
          const componentX = [componentLeftX, componentHalfX, componentRightX]

          // 距离顶部
          const componentTopY = component.attr.y
          const componentHalfY = componentTopY + componentH / 2
          const componentBottomY = componentTopY + componentH
          const componentY = [componentTopY, componentHalfY, componentBottomY]

          // 横线对比的是 Y
          if (lineItem.includes('rowt')) {
            // 顶部
            if (isSorption(selectTopY, componentTopY)) {
              line.select.set(lineItem, { y: componentTopY })
              setComponentPosition(selectTarget.value, selectLeftX, componentTopY)
            }
            if (isSorption(selectTopY, componentHalfY)) {
              line.select.set(lineItem, { y: componentHalfY })
              setComponentPosition(selectTarget.value, selectLeftX, componentHalfY)
            }
            if (isSorption(selectTopY, componentBottomY)) {
              line.select.set(lineItem, { y: componentBottomY })
              setComponentPosition(selectTarget.value, selectLeftX, componentBottomY)
            }
          }
          if (lineItem.includes('rowc')) {
            // 顶部
            if (isSorption(selectHalfY, componentTopY)) {
              line.select.set(lineItem, { y: componentTopY })
              setComponentPosition(selectTarget.value, selectLeftX, componentTopY - selectH / 2)
            }
            if (isSorption(selectHalfY, componentHalfY)) {
              line.select.set(lineItem, { y: componentHalfY })
              setComponentPosition(selectTarget.value, selectLeftX, componentHalfY - selectH / 2)
            }
            if (isSorption(selectHalfY, componentBottomY)) {
              line.select.set(lineItem, { y: componentBottomY })
              setComponentPosition(selectTarget.value, selectLeftX, componentBottomY - selectH / 2)
            }
          }
          if (lineItem.includes('rowb')) {
            // 顶部
            if (isSorption(selectBottomY, componentTopY)) {
              line.select.set(lineItem, { y: componentTopY })
              setComponentPosition(selectTarget.value, selectLeftX, componentTopY - selectH)
            }
            if (isSorption(selectBottomY, componentHalfY)) {
              line.select.set(lineItem, { y: componentHalfY })
              setComponentPosition(selectTarget.value, selectLeftX, componentHalfY - selectH)
            }
            if (isSorption(selectBottomY, componentBottomY)) {
              line.select.set(lineItem, { y: componentBottomY })
              setComponentPosition(selectTarget.value, selectLeftX, componentBottomY - selectH)
            }
          }

          // 纵线对比的是 X
          if (lineItem.includes('coll')) {
            if (isSorption(selectLeftX, componentLeftX)) {
              line.select.set(lineItem, { x: componentLeftX })
              setComponentPosition(selectTarget.value, componentLeftX, selectTopY)
            }
            if (isSorption(selectLeftX, componentHalfX)) {
              line.select.set(lineItem, { x: componentHalfX })
              setComponentPosition(selectTarget.value, componentHalfX, selectTopY)
            }
            if (isSorption(selectLeftX, componentRightX)) {
              line.select.set(lineItem, { x: componentRightX })
              setComponentPosition(selectTarget.value, componentRightX, selectTopY)
            }
          }
          if (lineItem.includes('colc')) {
            if (isSorption(selectHalfX, componentLeftX)) {
              line.select.set(lineItem, { x: componentLeftX })
              setComponentPosition(selectTarget.value, componentLeftX - selectW / 2, selectTopY)
            }
            if (isSorption(selectHalfX, componentHalfX)) {
              line.select.set(lineItem, { x: componentHalfX })
              setComponentPosition(selectTarget.value, componentHalfX - selectW / 2, selectTopY)
            }
            if (isSorption(selectHalfX, componentRightX)) {
              line.select.set(lineItem, { x: componentRightX })
              setComponentPosition(selectTarget.value, componentRightX - selectW / 2, selectTopY)
            }
          }
          if (lineItem.includes('colr')) {
            if (isSorption(selectRightX, componentLeftX)) {
              line.select.set(lineItem, { x: componentLeftX })
              setComponentPosition(selectTarget.value, componentLeftX - selectW, selectTopY)
            }
            if (isSorption(selectRightX, componentHalfX)) {
              line.select.set(lineItem, { x: componentHalfX })
              setComponentPosition(selectTarget.value, componentHalfX - selectW, selectTopY)
            }
            if (isSorption(selectRightX, componentRightX)) {
              line.select.set(lineItem, { x: componentRightX })
              setComponentPosition(selectTarget.value, componentRightX - selectW, selectTopY)
            }
          }
        })
      })
    } catch (err) {
      console.log(err)
    }
  }, 200),
  {
    deep: true
  }
)

// * 取消对齐线
watch(
  () => isComputedLine.value,
  (val) => {
    if (!val) {
      line.select.clear()
      line.sorptioned.y = false
    }
  }
)
</script>

<style lang="less" scoped>
.custom-edit-align-line {
    .line {
    z-index: 1;
    position: absolute;
    top: 0;
    left: 0;
    display: none;
    border-width: 1px;
    border-style: solid;
    border-color: #51d6a9;
    opacity: 0.7;
    &.visible {
      display: block;
    }
  }
  .row {
    width: 100%;
  }
  .col {
    height: 100%;
  }
}
</style>
