<template>
  <div class="water-eval-container">
    <div class="cityGreenLand-charts" id="cityGreenLand-charts2">
    </div>
    <div id="number_2" class=num>
      <div id="number_3" class=num> </div>
      <div id="number_4" class=num></div>
    </div>
  </div>
</template>

<script>
  import echarts from 'echarts'
  import 'echarts-gl';
  export default {
    name: "cityGreenLand",
    components: {},
    data() {
      return {
        population: [ // -- 人口情况
          {
            name: "流动人口",
            num: 501,
            rate: 22.77
          },
          {
            name: "常住人口",
            num: 1699,
            rate: 77.23
          }
        ],
        optionData: [{
          name: '流动人口',
          value: 22.77,
          itemStyle: {
            color: '#5BF96D',
          }
        }, {
          name: '常住人口',
          value: 77.23,
          itemStyle: {
            color: '#0B61C5'
          }
        }],
      }
    },
    mounted() {
      let clear = setInterval(() => {
        if (this.$store.getters.getSzdata.code === 10000&&this.$store.getters.getDaZhongdata.data&&this.$store.getters.getDaZhongdata.data.population) {
          this.population = this.$store.getters.getDaZhongdata.data.population
          console.log("this.population",this.population)
          this.optionData.filter(result => result.name == '常住人口')[0].value = +this.population.filter(result =>
            result.name ==
            '常住人口')[0].rate;
          this.optionData.filter(result => result.name == '流动人口')[0].value = +this.population.filter(result =>
            result
            .name == '流动人口')[0].rate;
       
          this.init();
          clearInterval(clear)
        }
      }, 500);
    },
    methods: {
      //数据匹配
      initData() {

      },
      init() {
        //构建3d饼状图
        let myChart = echarts.init(document.getElementById('cityGreenLand-charts2'));
        // 传入数据生成 option
        this.option = this.getPie3D(this.optionData, 0.8);
        myChart.setOption(this.option);
        //是否需要label指引线，如果要就添加一个透明的2d饼状图并调整角度使得labelLine和3d的饼状图对齐，并再次setOption
        this.option.series.push({
          name: 'pie2d',
          type: 'pie',
          labelLine: {
            length: 5,
            length2: 10
          },
          label: {
            formatter: '{b|{b}}\n{c|{c}}%',
            rich: {
              b: {
                color: '#fff',
                fontSize: 12,
              },
              c: {
                fontSize: 25,
              }
            }
          },
          startAngle: -20, //起始角度，支持范围[0, 360]。
          clockwise: false, //饼图的扇区是否是顺时针排布。上述这两项配置主要是为了对齐3d的样式
          radius: ['20%', '50%'],
          center: ['50%', '50%'],
          data: this.optionData,
          itemStyle: {
            opacity: 0
          }
        });
        myChart.setOption(this.option);
        let optionData = this.optionData;
        myChart.on('mouseover', function (params) {
          let num = optionData.filter(result => result.name == params.seriesName);
          if (num.length != 0) {
            document.getElementById("number_3").innerText = num[0].value + "%\n"
            document.getElementById("number_4").innerText = num[0].name
            if(num[0].name=="常住人口"){
              document.getElementById("number_3").style.color="#0B61C5"
            }else{
              document.getElementById("number_3").style.color="#5BF96D"
            }
            
          }
        });
        //	this.bindListen(myChart);
      },

      getPie3D(pieData, internalDiameterRatio) {
        //internalDiameterRatio:透明的空心占比
        let that = this;
        let series = [];
        let sumValue = 0;
        let startValue = 0;
        let endValue = 0;
        let legendData = [];
        let legendBfb = [];
        let k = 1 - internalDiameterRatio;
        pieData.sort((a, b) => {
          return (b.value - a.value);
        });
        // 为每一个饼图数据，生成一个 series-surface 配置
        for (let i = 0; i < pieData.length; i++) {
          sumValue += pieData[i].value;
          let seriesItem = {
            name: typeof pieData[i].name === 'undefined' ? `series${i}` : pieData[i].name,
            type: 'surface',
            parametric: true,
            wireframe: {
              show: false
            },
            pieData: pieData[i],
            pieStatus: {
              selected: false,
              hovered: true,
              k: k
            },
            center: ['10%', '50%']
          };

          if (typeof pieData[i].itemStyle != 'undefined') {
            let itemStyle = {};
            typeof pieData[i].itemStyle.color != 'undefined' ? itemStyle.color = pieData[i].itemStyle.color : null;
            typeof pieData[i].itemStyle.opacity != 'undefined' ? itemStyle.opacity = pieData[i].itemStyle.opacity :
              null;
            seriesItem.itemStyle = itemStyle;
          }
          series.push(seriesItem);
        }

        // 使用上一次遍历时，计算出的数据和 sumValue，调用 getParametricEquation 函数，
        // 向每个 series-surface 传入不同的参数方程 series-surface.parametricEquation，也就是实现每一个扇形。
        legendData = [];
        legendBfb = [];
        for (let i = 0; i < series.length; i++) {
          endValue = startValue + series[i].pieData.value;
          series[i].pieData.startRatio = startValue / sumValue;
          series[i].pieData.endRatio = endValue / sumValue;
          // series[i].parametricEquation = this.getParametricEquation(series[i].pieData.startRatio, series[i].pieData.endRatio,
          // 	false, false, k, series[i].pieData.value);
          series[i].parametricEquation = this.getParametricEquation(series[i].pieData.startRatio, series[i].pieData
            .endRatio,
            false, false, k, 20);
          startValue = endValue;
          let bfb = that.fomatFloat(series[i].pieData.value / sumValue, 4);
          legendData.push({
            name: series[i].name,
            value: bfb
          });
          legendBfb.push({
            name: series[i].name,
            value: bfb
          });
        }
        let boxHeight = this.getHeight3D(series, 20); //通过传参设定3d饼/环的高度，26代表26px

        //let boxHeight =0.03;

        // 准备待返回的配置项，把准备好的 legendData、series 传入。
        let option = {
          // legend: {
          // 	data: legendData,
          // 	orient: 'horizontal',
          // 	left: 80,
          // 	bottom: 10,
          // 	itemGap: 10,
          // 	textStyle: {
          // 		color: '#A1E2FF',
          // 	},
          // 	show: true,
          // 	icon: "circle",
          // 	// formatter: function(param) {
          // 	// 	let item = legendBfb.filter(item => item.name == param)[0];
          // 	// 	let bfs = that.fomatFloat(item.value * 100, 2) + "%";
          // 	// 	return `${item.name}  ${bfs}`;
          // 	// }
          // },
          labelLine: {
            show: true,
            lineStyle: {
              color: '#7BC0CB'
              // color: '#ffffff'
            }
          },
          label: {
            show: true,
            position: 'outside',
            rich: {
              b: {
                // color: '#7BC0CB',
                color: '#ffffff',
                fontSize: 15,
                lineHeight: 15
              },
              c: {
                fontSize: 18,
              },
            },
            //	formatter: '{b|{b} \n}{c|{c}}{b|  亩}',
            formatter: '{b|{b} \n}{c|{c}}{b|  }',
          },
          // tooltip: {
          // 	formatter: params => {
          // 		if (params.seriesName !== 'mouseoutSeries' && params.seriesName !== 'pie2d') {
          // 			let bfb = ((option.series[params.seriesIndex].pieData.endRatio - option.series[params.seriesIndex].pieData.startRatio) *
          // 				100).toFixed(2);
          // 			return `${params.seriesName}<br/>` +
          // 				`<span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>` +
          // 				`${ bfb }%`;
          // 		}
          // 	}
          // },
          xAxis3D: {
            min: -1,
            max: 1
          },
          yAxis3D: {
            min: -1,
            max: 1
          },
          zAxis3D: {
            min: -1,
            max: 1
          },
          grid3D: {
            show: false,
            boxHeight: boxHeight, //圆环的高度
            viewControl: { //3d效果可以放大、旋转等，请自己去查看官方配置
              alpha: 70, //角度
              distance: 300, //调整视角到主体的距离，类似调整zoom
              rotateSensitivity: 0, //设置为0无法旋转
              zoomSensitivity: 0, //设置为0无法缩放
              panSensitivity: 0, //设置为0无法平移
              autoRotate: false //自动旋转
            }
          },
          series: series
        };
        return option;
      },

      //获取3d丙图的最高扇区的高度
      getHeight3D(series, height) {
        series.sort((a, b) => {
          return (b.pieData.value - a.pieData.value);
        })
        return height * 25 / series[0].pieData.value;
      },

      // 生成扇形的曲面参数方程，用于 series-surface.parametricEquation
      getParametricEquation(startRatio, endRatio, isSelected, isHovered, k, h) {
        // 计算
        let midRatio = (startRatio + endRatio) / 2;
        let startRadian = startRatio * Math.PI * 2;
        let endRadian = endRatio * Math.PI * 2;
        let midRadian = midRatio * Math.PI * 2;
        // 如果只有一个扇形，则不实现选中效果。
        if (startRatio === 0 && endRatio === 1) {
          isSelected = false;
        }
        // 通过扇形内径/外径的值，换算出辅助参数 k（默认值 1/3）
        k = typeof k !== 'undefined' ? k : 1 / 3;
        // 计算选中效果分别在 x 轴、y 轴方向上的位移（未选中，则位移均为 0）
        let offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0;
        let offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0;
        // 计算高亮效果的放大比例（未高亮，则比例为 1）
        let hoverRate = isHovered ? 1.05 : 1;
        // 返回曲面参数方程
        return {
          u: {
            min: -Math.PI,
            max: Math.PI * 3,
            step: Math.PI / 32
          },
          v: {
            min: 0,
            max: Math.PI * 2,
            step: Math.PI / 20
          },
          x: function (u, v) {
            if (u < startRadian) {
              return offsetX + Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate;
            }
            if (u > endRadian) {
              return offsetX + Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate;
            }
            return offsetX + Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate;
          },
          y: function (u, v) {
            if (u < startRadian) {
              return offsetY + Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate;
            }
            if (u > endRadian) {
              return offsetY + Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate;
            }
            return offsetY + Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate;
          },
          z: function (u, v) {
            if (u < -Math.PI * 0.5) {
              return Math.sin(u);
            }
            if (u > Math.PI * 2.5) {
              return Math.sin(u) * h * .1;
            }
            return Math.sin(v) > 0 ? 1 * h * .1 : -1;
          }
        };
      },

      fomatFloat(num, n) {
        var f = parseFloat(num);
        if (isNaN(f)) {
          return false;
        }
        f = Math.round(num * Math.pow(10, n)) / Math.pow(10, n); // n 幂   
        var s = f.toString();
        var rs = s.indexOf('.');
        //判定如果是整数，增加小数点再补0
        if (rs < 0) {
          rs = s.length;
          s += '.';
        }
        while (s.length <= rs + n) {
          s += '0';
        }
        return s;
      },

      bindListen(myChart) {
        // 监听鼠标事件，实现饼图选中效果（单选），近似实现高亮（放大）效果。
        let that = this;
        let selectedIndex = '';
        let hoveredIndex = '';
        // 监听点击事件，实现选中效果（单选）
        myChart.on('click', function (params) {
          // 从 option.series 中读取重新渲染扇形所需的参数，将是否选中取反。
          let isSelected = !that.option.series[params.seriesIndex].pieStatus.selected;
          let isHovered = that.option.series[params.seriesIndex].pieStatus.hovered;
          let k = that.option.series[params.seriesIndex].pieStatus.k;
          let startRatio = that.option.series[params.seriesIndex].pieData.startRatio;
          let endRatio = that.option.series[params.seriesIndex].pieData.endRatio;
          // 如果之前选中过其他扇形，将其取消选中（对 option 更新）
          if (selectedIndex !== '' && selectedIndex !== params.seriesIndex) {
            that.option.series[selectedIndex].parametricEquation = that.getParametricEquation(that.option.series[
                selectedIndex].pieData
              .startRatio, that.option.series[selectedIndex].pieData.endRatio, false, false, k, that.option
              .series[
                selectedIndex].pieData
              .value);
            that.option.series[selectedIndex].pieStatus.selected = false;
          }
          // 对当前点击的扇形，执行选中/取消选中操作（对 option 更新）
          that.option.series[params.seriesIndex].parametricEquation = that.getParametricEquation(startRatio,
            endRatio,
            isSelected,
            isHovered, k, that.option.series[params.seriesIndex].pieData.value);
          that.option.series[params.seriesIndex].pieStatus.selected = isSelected;
          // 如果本次是选中操作，记录上次选中的扇形对应的系列号 seriesIndex
          isSelected ? selectedIndex = params.seriesIndex : null;
          // 使用更新后的 option，渲染图表
          myChart.setOption(that.option);
        });
        // 监听 mouseover，近似实现高亮（放大）效果
        myChart.on('mouseover', function (params) {
          // 准备重新渲染扇形所需的参数
          let isSelected;
          let isHovered;
          let startRatio;
          let endRatio;
          let k;
          // 如果触发 mouseover 的扇形当前已高亮，则不做操作
          if (hoveredIndex === params.seriesIndex) {
            return;
            // 否则进行高亮及必要的取消高亮操作
          } else {
            // 如果当前有高亮的扇形，取消其高亮状态（对 option 更新）
            if (hoveredIndex !== '') {
              // 从 option.series 中读取重新渲染扇形所需的参数，将是否高亮设置为 false。
              isSelected = that.option.series[hoveredIndex].pieStatus.selected;
              isHovered = false;
              startRatio = that.option.series[hoveredIndex].pieData.startRatio;
              endRatio = that.option.series[hoveredIndex].pieData.endRatio;
              k = that.option.series[hoveredIndex].pieStatus.k;
              // 对当前点击的扇形，执行取消高亮操作（对 option 更新）
              that.option.series[hoveredIndex].parametricEquation = that.getParametricEquation(startRatio, endRatio,
                isSelected,
                isHovered, k, that.option.series[hoveredIndex].pieData.value);
              that.option.series[hoveredIndex].pieStatus.hovered = isHovered;
              // 将此前记录的上次选中的扇形对应的系列号 seriesIndex 清空
              hoveredIndex = '';
            }
            // 如果触发 mouseover 的扇形不是透明圆环，将其高亮（对 option 更新）
            if (params.seriesName !== 'mouseoutSeries' && params.seriesName !== 'pie2d') {
              // 从 option.series 中读取重新渲染扇形所需的参数，将是否高亮设置为 true。
              isSelected = that.option.series[params.seriesIndex].pieStatus.selected;
              isHovered = true;
              startRatio = that.option.series[params.seriesIndex].pieData.startRatio;
              endRatio = that.option.series[params.seriesIndex].pieData.endRatio;
              k = that.option.series[params.seriesIndex].pieStatus.k;
              // 对当前点击的扇形，执行高亮操作（对 option 更新）
              that.option.series[params.seriesIndex].parametricEquation = that.getParametricEquation(startRatio,
                endRatio,
                isSelected, isHovered, k, that.option.series[params.seriesIndex].pieData.value + 5);
              that.option.series[params.seriesIndex].pieStatus.hovered = isHovered;
              // 记录上次高亮的扇形对应的系列号 seriesIndex
              hoveredIndex = params.seriesIndex;
            }
            // 使用更新后的 option，渲染图表
            myChart.setOption(that.option);
          }
        });
        // 修正取消高亮失败的 bug
        myChart.on('globalout', function () {
          // 准备重新渲染扇形所需的参数
          let isSelected;
          let isHovered;
          let startRatio;
          let endRatio;
          let k;
          if (hoveredIndex !== '') {
            // 从 option.series 中读取重新渲染扇形所需的参数，将是否高亮设置为 true。
            isSelected = that.option.series[hoveredIndex].pieStatus.selected;
            isHovered = false;
            k = that.option.series[hoveredIndex].pieStatus.k;
            startRatio = that.option.series[hoveredIndex].pieData.startRatio;
            endRatio = that.option.series[hoveredIndex].pieData.endRatio;
            // 对当前点击的扇形，执行取消高亮操作（对 option 更新）
            that.option.series[hoveredIndex].parametricEquation = that.getParametricEquation(startRatio, endRatio,
              isSelected,
              isHovered, k, that.option.series[hoveredIndex].pieData.value);
            that.option.series[hoveredIndex].pieStatus.hovered = isHovered;
            // 将此前记录的上次选中的扇形对应的系列号 seriesIndex 清空
            hoveredIndex = '';
          }
          // 使用更新后的 option，渲染图表
          myChart.setOption(that.option);
        });
      }
    }
  }

</script>
<style scoped>
  .water-eval-container {
    position: absolute;
    width: 100%;
    height: 100%;
    top: -30%;
    right: 130%
  }

  .cityGreenLand-charts {
    height: 400px;
    width: 400px;
  }

  .num {
    position: absolute;
    width: 30%;
    height: 15%;
    right: -75%;
    top: 75%;
    font-weight: bold;
    /* background-color: rgb(255, 0, 0,0.3); */
    font-size: 35px;
  }

  @media screen and (max-height: 1000px) {
    .water-eval-container {
      position: absolute;
      width: 100%;
      height: 100%;
      top: 1%;
      right: 2%;

    }

    .cityGreenLand-charts {
      height: 400px;
      width: 400px;
    }

    .num {
      position: absolute;
      width: 35%;
      height: 15%;
      right: 30%;
      top: 45%;
      font-weight: bold;
      /* background-color: rgb(255, 0, 0,0.3); */
      font-size: 25px;
    }
    #number_3{
      position: absolute;
      width: 60%;
      height: 65%;
      right: 40%;
      top: 5%;
      font-weight: bold;
      /* background-color: rgb(255, 0, 0,0.3); */
      font-size: 30px;
    }
    #number_4{
      position: absolute;
      width: 60%;
      height: 65%;
      right: 35%;
      top: 71%;
      font-weight: bold;
      /* background-color: rgb(255, 0, 0,0.3); */
      font-size: 15px;
    }
  }

</style>
