import { computed, defineComponent, nextTick, ref } from 'vue'
import styles from './index.module.less'
import icon1 from '../images/icon1.png'
import iconArrow from '../images/icon-arrow.png'
import iconArrow1 from '../images/icon-arrow1.png'
import iconArrow11 from '../images/icon-arrow1-1.png'
import { Popover } from 'vant'

import * as echarts from 'echarts/core'
import {
  LineChart
  // LineSeriesOption
} from 'echarts/charts'
// import { PieChart } from 'echarts/charts'
import {
  TitleComponent,
  // 组件类型的定义后缀都为 ComponentOption
  // TitleComponentOption,
  TooltipComponent,
  // TooltipComponentOption,
  GridComponent,
  // 数据集组件
  DatasetComponent,
  // DatasetComponentOption,
  // 内置数据转换器组件 (filter, sort)
  // TransformComponent,
  LegendComponent,
  ToolboxComponent,
  DataZoomComponent
} from 'echarts/components'
import { LabelLayout } from 'echarts/features'
import { CanvasRenderer } from 'echarts/renderers'
import request from '@/helpers/request'
import dayjs from 'dayjs'
import { listenerMessage, postMessage } from '@/helpers/native-message'
import { browser } from '@/helpers/utils'
import { useRouter } from 'vue-router'

// 注册必须的组件
echarts.use([
  TitleComponent,
  TooltipComponent,
  GridComponent,
  DatasetComponent,
  // TransformComponent,
  LabelLayout,
  // UniversalTransition,
  CanvasRenderer,
  // PieChart,
  ToolboxComponent,
  LegendComponent,
  DataZoomComponent,
  LineChart
])

const lineChartOption = (
  xAxisData: any,
  seriesData: any,
  countMaxCount = 5
) => {
  return {
    // title: {
    //   text: '单位：次',
    //   textStyle: {
    //     color: '#777777',
    //     fontSize: 13,
    //     fontWeight: 400
    //   }
    // },
    legend: { show: false },
    emphasis: { lineStyle: { width: 2 } },
    xAxis: {
      data: xAxisData,
      type: 'category',
      axisLine: { lineStyle: { color: '#8C8C8C' } },
      lineStyle: { color: '#F2F2F2' },
      boundaryGap: true,
      axisLabel: {
        // formatter: function (value, index) {
        //   // 第一个和最后一个标签分别居左和居右显示
        //   if (index === 0) {
        //     return '{left|' + value + '}'
        //   } else if (index === xAxisData.length - 1) {
        //     return '{right|' + value + '}'
        //   } else {
        //     return value
        //   }
        // },
        // rich: {
        //   left: {
        //     align: 'left'
        //   },
        //   right: {
        //     align: 'right'
        //   }
        // }
        // align: 'left'
      }
    },
    color: [
      '#2DC7AA',
      '#FF6079'
      // '#2DC7AA',
      // '#FF602C',
      // '#91DD1C',
      // '#FFA92C',
      // '#BE7E2E',
      // '#1C96DD',
      // '#D22CFF',
      // '#FF3C3C',
      // '#1AEE3E',
      // '#00c9ff'
    ],
    series: [
      {
        lineStyle: { width: 2 },
        data: seriesData[0],
        symbol: 'circle',
        showSymbol: false,
        name: '浏览次数',
        type: 'line',
        emphasis: { lineStyle: { width: 2 } }
      },
      {
        lineStyle: { width: 2 },
        data: seriesData[1],
        symbol: 'circle',
        showSymbol: false,
        name: '购买次数',
        type: 'line',
        areaStyle: {
          color: {
            type: 'linear',
            x: 0,
            y: 0,
            x2: 0,
            y2: 1,
            colorStops: [
              {
                offset: 0,
                color: 'rgba(255, 96, 121, 0.23)'
                // 0% 处的颜色
              },
              {
                offset: 1,
                // 100% 处的颜色
                color: 'rgba(255, 96, 121, 0)'
              }
            ]
          }
        },
        emphasis: { lineStyle: { width: 2 } }
      }
    ],
    grid: {
      bottom: '3%',
      containLabel: true,
      left: '4%',
      right: '4%',
      top: '20'
    },
    tooltip: {
      trigger: 'axis',
      position: function (point) {
        // 固定在顶部
        return [point[0], '10%']
      },
      confine: true,
      formatter: function (params: any) {
        return params[0].name
      },
      backgroundColor: '#FF6079',
      borderWidth: 0,
      borderRadius: 24,
      padding: [1, 4],
      textStyle: {
        color: '#FFFFFF',
        fontSize: 12
      },
      extraCssText: 'z-index: 2',
      axisPointer: {
        lineStyle: {
          color: '#FF6079'
        }
      }
    },
    yAxis: {
      type: 'value',
      splitLine: {
        axisLine: { lineStyle: { color: '#F2F2F2' } },
        lineStyle: { color: ['#f2f2f2'], type: 'dashed' }
      },
      splitNumber: countMaxCount
    },
    dataZoom: [{ type: 'inside', throttle: 100 }]
    // toolbox: { feature: { saveAsImage: { show: false } } }
  }
}

export type TIME_TYPE = 'MONTH' | 'THREE_MONTH' | 'HALF_YEAR' | 'YEAR'

/** 获取时间范围 */
export const getTimeRange = (type: TIME_TYPE) => {
  if (type === 'MONTH') {
    return {
      startTime: dayjs().format('YYYY-MM') + '-01',
      endTime: dayjs().format('YYYY-MM-DD')
    }
  } else if (type === 'THREE_MONTH') {
    return {
      startTime: dayjs().subtract(3, 'month').format('YYYY-MM-DD'),
      endTime: dayjs().format('YYYY-MM-DD')
    }
  } else if (type === 'HALF_YEAR') {
    return {
      startTime: dayjs().subtract(6, 'month').format('YYYY-MM-DD'),
      endTime: dayjs().format('YYYY-MM-DD')
    }
  } else if (type === 'YEAR') {
    return {
      startTime: dayjs().subtract(1, 'year').format('YYYY-MM-DD'),
      endTime: dayjs().format('YYYY-MM-DD')
    }
  }
}

export default defineComponent({
  name: 'HomeStatistics',
  setup() {
    const homeStatisticsRef = ref()
    const router = useRouter()
    const popoverStatus = ref(false)
    const currentType = ref<TIME_TYPE>('MONTH')
    const timeRange = ref(getTimeRange(currentType.value))
    const statisticCounts = ref({
      browseCount: 0,
      buyCount: 0,
      time: ''
    })
    let myChart: echarts.ECharts
    nextTick(() => {
      myChart = echarts.init(
        document.getElementById('eChart') as HTMLDivElement
      )
      getDetail()

      const round = homeStatisticsRef.value?.getBoundingClientRect()
      postMessage({
        api: 'homeStatisticsHeight',
        content: {
          height: round.height || 300
        }
      })
    })

    const searchText = computed(() => {
      const template = {
        MONTH: '本月',
        THREE_MONTH: '近三个月',
        HALF_YEAR: '近半年',
        YEAR: '近一年'
      }
      return template[currentType.value]
    })

    const getDetail = async () => {
      try {
        const { data } = await request.post(
          '/api-teacher/home/courseExposure',
          {
            data: timeRange.value
          }
        )

        const buy = data.buy || []
        const exposure = data.exposure || []
        const xAxisData: string[] = []
        const exposureList: number[] = []
        let maxCount = 0 // 最大人数 - 用记设置练习人数分割线
        exposure.forEach((item: any, index: number) => {
          xAxisData.push(item.date)
          exposureList.push(item.exposureNum)

          if (maxCount < (item.exposureNum || 0)) {
            maxCount = item.exposureNum
          }
          if (exposure.length - 1 === index) {
            statisticCounts.value.browseCount = item.exposureNum
            statisticCounts.value.time = item.date
          }
        })
        const buyList: number[] = []
        buy.forEach((item: any, index: number) => {
          buyList.push(item.exposureNum)

          if (buy.length - 1 === index) {
            statisticCounts.value.buyCount = item.exposureNum
          }
        })
        const yAxisData = [exposureList, buyList]
        const countMaxCount = maxCount >= 5 ? 5 : Math.max(maxCount, 1)
        myChart.clear()
        lineChartOption &&
          myChart.setOption(
            lineChartOption(xAxisData, yAxisData, countMaxCount),
            true
          )

        myChart.on('highlight', function (params: any) {
          const batch = params.batch || []
          const options: any = myChart.getOption()
          batch.forEach((item: any) => {
            const batchIndex = item.dataIndex
            const browseCount = options.series[0].data[batchIndex]
            const buyCount = options.series[1].data[batchIndex]
            const time = options.xAxis[0].data[batchIndex]
            statisticCounts.value = {
              browseCount,
              buyCount,
              time
            }
          })
        })

        // 可能出现多个时，图表同时渲染，提示有问题
        setTimeout(() => {
          const lastIndex = yAxisData[0].length - 1
          myChart.dispatchAction({
            type: 'showTip',
            seriesIndex: 0, // 系列索引
            dataIndex: lastIndex // 数据索引
          })
        }, 0)
      } catch {
        //
      }
    }

    const onChangeTime = (type: TIME_TYPE) => {
      popoverStatus.value = false
      if (currentType.value === type) return
      currentType.value = type
      timeRange.value = getTimeRange(currentType.value)
      getDetail()
    }

    /** 跳转详情 */
    const goDetail = () => {
      if (browser().isApp) {
        postMessage({
          api: 'openWebView',
          content: {
            url: `${location.origin}/teacher/#/home-statistics-detail?currentType=${currentType.value}`,
            orientation: 1,
            isHideTitle: false
          }
        })
      } else {
        router.push({
          path: '/home-statistics-detail',
          query: {
            currentType: currentType.value
          }
        })
      }
    }

    // 监听页面返回
    listenerMessage('webViewOnResume', () => {
      getDetail()
    })
    return () => (
      <div class={styles.homeStatistics} ref={homeStatisticsRef}>
        <div class={styles.homeHead}>
          <div class={styles.title}>
            <img src={icon1} />
            <span>浏览/购买</span>
          </div>

          <div class={styles.more} onClick={goDetail}>
            <span>详情</span>
            <img src={iconArrow} />
          </div>
        </div>

        <div class={styles.eChartSection}>
          <div class={styles.eChartTitle}>
            <div class={styles.left}>
              {statisticCounts.value.time && (
                <div class={styles.time}>{statisticCounts.value.time}</div>
              )}

              <div class={styles.twoItem}>
                <div class={styles.item} style="--color: #2DC7AA">
                  <span class={styles.line}></span>
                  <span class={styles.text}>浏览次数</span>
                  <span class={styles.num}>
                    {statisticCounts.value.browseCount}次
                  </span>
                </div>
                <div class={styles.item} style="--color: #FF6079">
                  <span class={styles.line}></span>
                  <span class={styles.text}>购买次数</span>
                  <span class={styles.num}>
                    {statisticCounts.value.buyCount}次
                  </span>
                </div>
              </div>
            </div>
          </div>

          <div class={styles.unit}>
            <div class={styles.unitText}>单位：次</div>
            <div class={styles.right}>
              <Popover
                v-model:show={popoverStatus.value}
                showArrow={false}
                placement="bottom-end"
              >
                {{
                  default: () => (
                    <div class={'select-time'}>
                      <span
                        onClick={() => onChangeTime('MONTH')}
                        class={currentType.value === 'MONTH' ? 'active' : ''}
                      >
                        本月
                      </span>
                      <span
                        onClick={() => onChangeTime('THREE_MONTH')}
                        class={
                          currentType.value === 'THREE_MONTH' ? 'active' : ''
                        }
                      >
                        近三个月
                      </span>
                      <span
                        onClick={() => onChangeTime('HALF_YEAR')}
                        class={
                          currentType.value === 'HALF_YEAR' ? 'active' : ''
                        }
                      >
                        近半年
                      </span>
                      <span
                        onClick={() => onChangeTime('YEAR')}
                        class={currentType.value === 'YEAR' ? 'active' : ''}
                      >
                        近一年
                      </span>
                    </div>
                  ),
                  reference: () => (
                    <div
                      class={[
                        styles.showItem,
                        popoverStatus.value && styles.showItemActive
                      ]}
                    >
                      <span>{searchText.value}</span>
                      <img
                        src={popoverStatus.value ? iconArrow11 : iconArrow1}
                      />
                    </div>
                  )
                }}
              </Popover>
            </div>
          </div>

          <div class={styles.eChart}>
            <div id="eChart" style="width: 100%; height: 100%;"></div>
          </div>
        </div>
      </div>
    )
  }
})