<template>
  <moduleEnclosure title="趋势图">
    <template v-slot:rightce>
      <div class="classbtns">
        <div @click="cindex = 0" :class="{
          select: cindex === 0,
        }">
          浏览量(PV)
        </div>
        <div @click="cindex = 1" :class="{
          select: cindex === 1,
        }">
          访客量(UV)
        </div>
      </div>
    </template>
    <div style="width: 100%; height: 100%">
      <div :id="`chartmain_fkell`" style="width: 100%; height: 100%"></div>
    </div>
  </moduleEnclosure>
</template>

<script>
import { bigGetLarge3 } from '@/api/common.js';
import moduleEnclosure from '@/components/moduleEnclosure.vue';
import * as echarts from 'echarts';
import { csize } from '@/utils/const.js';
export default {
  components: {
    moduleEnclosure,
  },
  data() {
    return {
      cindex: 0,
    };
  },
  mounted() {
    this.getbigGetLarge3()
  },
  beforeUnmount() {

  },
  watch: {
    cindex(){
      this.getbigGetLarge3()
    }
  },
  methods: {
    getbigGetLarge3() {
      bigGetLarge3().then(res => {
        this.eac(res.data)
      })
    },
    eac(value) {
      var that = this
      if (that.myChart) {
        that.myChart.dispose();
      }
      var times = value.map((item) => {
        var str1 = item.dstr.split(' ')[0];
        return str1.slice(5);
      });
      var data = value.map((item) => {
        return item[["num", "userNum"][this.cindex]];
      });
      // 计算刻度的间隔
      var interval = Math.ceil((Math.max(...data) - Math.min(...data)) / 2); // 确保有 3 个刻度
      interval = interval < 1 ? 1 : interval
      // 计算 y 轴的最大值和最小值
      var maxY = Math.ceil(Math.max(...data) / interval) * interval;
      maxY = maxY < 3 ? 3 : maxY
      var minY = Math.floor(Math.min(...data) / interval) * interval;
      minY = minY < 1 ? 1 : minY
      var option = {
        tooltip: {
          trigger: 'axis',
          formatter: function (params) {
            var res = '' + params[1].name + ' : ' + params[1].value;
            return `<div style="color:#fff;">${res}</div>`;
          },
          transitionDuration: 0,
          backgroundColor: '#092a66',
          borderColor: '#0462b5',
          borderRadius: 8,
          borderWidth: 2,
          padding: [5, 10],
          axisPointer: {
            type: 'line',
            lineStyle: {
              type: 'dashed',
              color: '#8AB1DC',
            },
          },
        },
        title: {
          text: '',
          subtext: '',
        },
        grid: {
          x: csize(40),
          y: csize(40),
          x2: csize(20),
          y2: csize(20),
        },
        xAxis: {
          data: times,
          axisLabel: {
            interval: Math.floor(times.length / 15),
            showMinLabel: true, //是否显示最小 tick 的 label
            showMaxLabel: true, //是否显示最大 tick 的 label
            fontSize: csize(12),
          },
          axisTick: {
            show: false,
          },
          axisLine: {
            show: false,
            symbol: ['none', 'arrow'],
            symbolOffset: 12,
            lineStyle: {
              fontSize: csize(12),
              color: '#8AB1DC',
            },
          },
          boundaryGap: false,
        },
        yAxis: [
          {
            // min: minY,
            // max: maxY,
            // interval: interval,
            type: 'value',
            name: '人（次）',
            nameTextStyle: {
              fontSize: csize(16),
            },
            axisLine: {
              show: false,
              lineStyle: {
                color: '#8AB1DC',
              },
            },
            axisLabel: {
              margin: 10,
              textStyle: {
                fontSize: csize(12),
              },
            },
            splitLine: {
              lineStyle: {
                color: '#364D95',
              },
            },
            axisTick: {
              show: false,
            },
          },
        ],
        dataZoom: [
          {
            type: 'inside',
          },
        ],
        series: [
          {
            // For shadow
            type: 'line',
            barWidth: 10,
            smooth: true,  // 设置平滑曲线
            symbol: 'none',  // 隐藏节点
            itemStyle: {
              color: 'rgba(0,0,0,0.05)',
            },
            barGap: '-100%',
            barCategoryGap: '40%',
            data: data,
            animation: false,
          },
          {
            type: 'line',
            barWidth: 10,
            smooth: true,  // 设置平滑曲线
            symbol: 'none',  // 隐藏节点
            itemStyle: {
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                { offset: 0, color: '#0efdff' },
                { offset: 0.5, color: '#188df0' },
                { offset: 1, color: '#188df0' },
              ]),
              barBorderRadius: 5,
            },
            areaStyle: {  // 设置阴影样式
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{  // 线性渐变，从上到下
                offset: 0,
                color: 'rgba(45,77,149,1)'  // 阴影起始颜色
              }, {  // 线性渐变，从上到下
                offset: 0.5,
                color: 'rgba(45,77,149,.5)'  // 阴影起始颜色
              }, {
                offset: 1,
                color: 'rgba(45,77,149,.2)'  // 阴影结束颜色
              }])
            },
            emphasis: {
              itemStyle: {
                color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  { offset: 0, color: '#2378f7' },
                  { offset: 0.7, color: '#2378f7' },
                  { offset: 1, color: '#0efdff' },
                ]),
                barBorderRadius: 5,
              },
            },
            data: data,
          },
        ],
      };
      that.myChart = new echarts.init(document.getElementById('chartmain_fkell'));
      that.myChart.setOption(option);
    },
  },
};
</script>

<style scoped lang="scss">
.classbtns {
  width: 200px;
  height: 30px;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;

  div:nth-child(1),
  div:nth-child(2) {
    width: 48%;
    height: 100%;
    text-align: center;
    line-height: 28px;
    border: 1px solid #0e72e6;
    position: relative;
  }

  div:nth-child(1) {
    border-right: 1px solid #0e72e6;
  }

  .select {
    background: #0e72e6;
    color: #bbd4ff;
  }
}

::v-deep .el-carousel__arrow,
::v-deep .el-carousel__indicators {
  display: none;
}
</style>
