<template>
  <v-chart
    ref="vChartRef"
    :init-options="initOptions"
    :theme="themeColor"
    :option="option"
    :manual-update="isPreview()"
    :update-options="{
      replaceMerge: replaceMergeArr
    }"
    autoresize
    @mouseover="handleHighlight"
    @mouseout="handleDownplay"
  >
  </v-chart>
</template>

<script setup lang="ts">
import { PropType, computed, watch, ref, nextTick, onMounted } from 'vue'
import VChart from 'vue-echarts'
import { useCanvasInitOptions } from '@/hooks/useCanvasInitOptions.hook'
import { use } from 'echarts/core'
import { CanvasRenderer } from 'echarts/renderers'
import { LineChart } from 'echarts/charts'
import config, { includes, seriesItem } from './config'
import { mergeTheme } from '@/packages/public/chart'
import { useChartEditStore } from '@/store/modules/chartEditStore/chartEditStore'
import { useChartDataFetch } from '@/hooks'
import { isPreview } from '@/utils'
import { DatasetComponent, GridComponent, TooltipComponent, LegendComponent } from 'echarts/components'
import isObject from 'lodash/isObject'
import dataJson from './data.json'

const props = defineProps({
  themeSetting: {
    type: Object,
    required: true
  },
  themeColor: {
    type: Object,
    required: true
  },
  chartConfig: {
    type: Object as PropType<config>,
    required: true
  }
})

const initOptions = useCanvasInitOptions(props.chartConfig.option, props.themeSetting)

use([DatasetComponent, CanvasRenderer, LineChart, GridComponent, TooltipComponent, LegendComponent])

const replaceMergeArr = ref<string[]>()

const option = computed(() => {
  return mergeTheme(props.chartConfig.option, props.themeSetting, includes)
})

// dataset 无法变更条数的补丁
watch(
  () => props.chartConfig.option.dataset,
  (newData: { dimensions: any }, oldData) => {
    try {
      if (!isObject(newData) || !('dimensions' in newData)) return
      if (Array.isArray(newData?.dimensions)) {
        const seriesArr = []
        for (let i = 0; i < newData.dimensions.length - 1; i++) {
          seriesArr.push(seriesItem)
        }
        replaceMergeArr.value = ['series']
        props.chartConfig.option.series = seriesArr
        nextTick(() => {
          replaceMergeArr.value = []
        })
      }
    } catch (error) {
      console.log(error)
    }
  },
  {
    deep: false
  }
)

let seriesDataNum = -1
let seriesDataMaxLength = 0
let intervalInstance: any = null
const duration = 1500

// 会重新选择需要选中和展示的数据
const handleSeriesData = () => {
  if (seriesDataNum > -1) {
    vChartRef.value?.dispatchAction({
      type: 'downplay',
      dataIndex: seriesDataNum
    })
  }
  seriesDataNum = seriesDataNum >= seriesDataMaxLength - 1 ? 0 : seriesDataNum + 1
  vChartRef.value?.dispatchAction({
    type: 'showTip',
    seriesIndex: 0,
    dataIndex: seriesDataNum
  })
}

// 新增轮播
const addPieInterval = (newData?: typeof dataJson, skipPre = false) => {
  if (!skipPre && !Array.isArray(newData?.source)) return
  if (!skipPre) seriesDataMaxLength = newData?.source.length || 0
  clearInterval(intervalInstance)
  intervalInstance = setInterval(() => {
    handleSeriesData()
  }, duration)
}

// 取消轮播
const clearPieInterval = () => {
  vChartRef.value?.dispatchAction({
    type: 'hideTip',
    seriesIndex: 0,
    dataIndex: seriesDataNum
  })
  vChartRef.value?.dispatchAction({
    type: 'downplay',
    dataIndex: seriesDataNum
  })
  clearInterval(intervalInstance)
  intervalInstance = null
}

// 处理鼠标聚焦高亮内容
const handleHighlight = () => {
  clearPieInterval()
}

// 处理鼠标取消悬浮
const handleDownplay = () => {
  if (props.chartConfig.option.isCarousel && !intervalInstance) {
    // 恢复轮播
    addPieInterval(undefined, true)
  }
}

watch(
  () => props.chartConfig.option.isCarousel,
  newData => {
    if (newData) {
      addPieInterval(undefined, true)
      props.chartConfig.option.legend.show = false
    } else {
      props.chartConfig.option.legend.show = true
      clearPieInterval()
    }
  }
)

const { vChartRef } = useChartDataFetch(props.chartConfig, useChartEditStore, (newData: typeof dataJson) => {
  // addPieInterval(newData)
})

onMounted(() => {
  seriesDataMaxLength = dataJson.source.length
  if (props.chartConfig.option.isCarousel) {
    addPieInterval(undefined, true)
  }
})
</script>