<template>
    <!-- 为 ECharts 准备一个定义了宽高的 DOM -->
    <div ref="chart" style="width:100%;height:350px;;"></div>
   </template>
   
   <script>
   import * as echarts from 'echarts'
   import chinaMap from '@/assets/json/china.json'
import { color } from 'd3';
   
   export default {
       data(){
           return {
               items:[]
           }
       },
       mounted(){
           this.initChart();
       },
       methods:{
           initChart(){
               // 基于准备好的dom，初始化echarts实例
               var myChart = echarts.init(this.$refs.chart);
               var chinaGeoCoordMap = {
		'黑龙江': [127.9688, 45.368],
		'内蒙古': [110.3467, 41.4899],
		"吉林": [125.8154, 44.2584],
		'北京市': [116.4551, 40.2539],
		"辽宁": [123.1238, 42.1216],
		"河北": [114.4995, 38.1006],
		"天津": [117.4219, 39.4189],
		"山西": [112.3352, 37.9413],
		"陕西": [109.1162, 34.2004],
		"甘肃": [103.5901, 36.3043],
		"宁夏": [106.3586, 38.1775],
		"青海": [101.4038, 36.8207],
		"新疆": [87.9236, 43.5883],
		"西藏": [91.11, 29.97],
		"四川": [103.9526, 30.7617],
		"重庆": [108.384366, 30.439702],
		"山东": [117.1582, 36.8701],
		"河南": [113.4668, 34.6234],
		"江苏": [118.8062, 31.9208],
		"安徽": [117.29, 32.0581],
		"湖北": [114.3896, 30.6628],
		"浙江": [119.5313, 29.8773],
		"福建": [119.4543, 25.9222],
		"江西": [116.0046, 28.6633],
		"湖南": [113.0823, 28.2568],
		"贵州": [106.6992, 26.7682],
		"云南": [102.9199, 25.4663],
		"广东": [113.12244, 23.009505],
		"广西": [108.479, 23.1152],
		"海南": [110.3893, 19.8516],
		'上海': [121.4648, 31.2891]
                };
                var chinaDatas = [
                    [{
                        name: '黑龙江',
                        value: 0
                    }],	[{
                        name: '内蒙古',
                        value: 0
                    }],	[{
                        name: '吉林',
                        value: 0
                    }],	[{
                        name: '辽宁',
                        value: 0
                    }],	[{
                        name: '河北',
                        value: 0
                    }],	[{
                        name: '天津',
                        value: 0
                    }],	[{
                        name: '山西',
                        value: 0
                    }],	[{
                        name: '陕西',
                        value: 0
                    }],	[{
                        name: '甘肃',
                        value: 0
                    }],	[{
                        name: '宁夏',
                        value: 0
                    }],	[{
                        name: '青海',
                        value: 0
                    }],	[{
                        name: '新疆',
                        value: 0
                    }],[{
                        name: '西藏',
                        value: 0
                    }],	[{
                        name: '四川',
                        value: 0
                    }],	[{
                        name: '重庆',
                        value: 0
                    }],	[{
                        name: '山东',
                        value: 0
                    }],	[{
                        name: '河南',
                        value: 0
                    }],	[{
                        name: '江苏',
                        value: 0
                    }],	[{
                        name: '安徽',
                        value: 0
                    }],	[{	
                        name: '湖北',
                        value: 0
                    }],	[{
                        name: '浙江',
                        value: 0
                    }],	[{
                        name: '福建',
                        value: 0
                    }],	[{
                        name: '江西',
                        value: 0
                    }],	[{
                        name: '湖南',
                        value: 0
                    }],	[{
                        name: '贵州',
                        value: 0
                    }],[{
                        name: '广西',
                        value: 0
                    }],	[{
                        name: '海南',
                        value: 0
                    }],	[{
                        name: '上海',
                        value: 1
                    }]
                ];
                var convertData = function(data) {
                    var res = [];
                    for(var i = 0; i < data.length; i++) {
                        var dataItem = data[i];
                        var fromCoord = chinaGeoCoordMap[dataItem[0].name];
                        var toCoord = [116.4551,40.2539];
                        if(fromCoord && toCoord) {
                            res.push([{
                                coord: fromCoord,
                                value: dataItem[0].value
                            }, {
                                coord: toCoord,
                            }]);
                        }
                    }
                    return res;
                };
                var series = [];
                [['北京市', chinaDatas]].forEach(function(item, i) {
                    console.log(item)
                    series.push({
                            type: 'lines',
                            zlevel: 2,
                            effect: {
                                show: true,
                                period: 4, //箭头指向速度，值越小速度越快
                                trailLength: 0.02, //特效尾迹长度[0,1]值越大，尾迹越长重
                                symbol: 'arrow', //箭头图标
                                symbolSize: 5, //图标大小
                            },
                            lineStyle: {
                                normal: {
                                    width: 1, //尾迹线条宽度
                                    opacity: 1, //尾迹线条透明度
                                    color:'blue',
                                    curveness: .3 //尾迹线条曲直度
                                }
                            },
                            data: convertData(item[1])
                        }, 
                        {
                            type: 'effectScatter',
                            coordinateSystem: 'geo',
                            zlevel: 2,
                            rippleEffect: { //涟漪特效
                                period: 4, //动画时间，值越小速度越快
                                brushType: 'stroke', //波纹绘制方式 stroke, fill
                                scale: 4 //波纹圆环最大限制，值越大波纹越大
                            },
                            label: {
                                normal: {
                                    show: true,
                                    position: 'right', //显示位置
                                    offset: [5, 0], //偏移设置
                                    formatter: function(params){//圆环显示文字
                                        return params.data.name;
                                    },
                                    fontSize: 13
                                },
                                emphasis: {
                                    show: true
                                }
                            },
                            symbol: 'circle',
                            symbolSize: function(val) {
                                return 5+ val[2] * 5; //圆环大小
                            },
                            itemStyle: {
                                normal: {
                                    show: true,
                                    color: 'yellow'
                                }
                            },
                            data: item[1].map(function(dataItem) {
                                return {
                                    name: dataItem[0].name,
                                    value: chinaGeoCoordMap[dataItem[0].name].concat([dataItem[0].value])
                                };
                            }),
                        },
                        //被攻击点
                        {
                            type: 'scatter',
                            coordinateSystem: 'geo',
                            zlevel: 2,
                            rippleEffect: {
                                period: 4,
                                brushType: 'stroke',
                                scale: 4
                            },
                            label: {
                                normal: {
                                    show: true,
                                    position: 'right',
                                    //offset:[5, 0],
                                    color: '#0f0',
                                    formatter: '{b}',
                                    textStyle: {
                                        color: "#0f0"
                                    }
                                },
                                emphasis: {
                                    show: true,
                                    color: "#f60"
                                }
                            },
                            symbol: 'pin',
                            symbolSize: 50,
                            data: [{
                                name: item[0],
                                value: chinaGeoCoordMap[item[0]].concat([10]),
                            }],
                        }
                    );
                });
                let option = {
                    tooltip: {
                        trigger: 'item',
                        backgroundColor: 'rgba(166, 200, 76, 0.82)',
                        borderColor: '#FFFFCC',
                        showDelay: 0,
                        hideDelay: 0,
                        enterable: true,
                        transitionDuration: 0,
                        extraCssText: 'z-index:100',
                        formatter: function(params, ticket, callback) {
                            //根据业务自己拓展要显示的内容
                            var res = "";
                            var name = params.name;
                            var value = params.value[params.seriesIndex + 1];
                            res = "<span style='color:#fff;'>" + name + "</span><br/>数据：" + value;
                            return res;
                        }
                    },
                    backgroundColor:"#013954",
                    // visualMap: { //图例值控制
                    //     min: 0,
                    //     max: 1,
                    //     calculable: true,
                    //     show: true,
                    //     color: ['#f44336', '#fc9700', '#ffde00', '#ffde00', '#00eaff'],
                    //     textStyle: {
                    //         color: '#fff'
                    //     }
                    // },
                    geo: {
                        map: 'china',
                        zoom: 1.2,
                        label: {
                            emphasis: {
                                show: false
                            }
                        },
                        roam: true, //是否允许缩放
                        itemStyle: {
                            normal: {
                                color: 'rgba(51, 69, 89, .5)', //地图背景色
                                borderColor: '#516a89', //省市边界线00fcff 516a89
                                borderWidth: 1
                            },
                            emphasis: {
                                color: 'rgba(37, 43, 61, .5)' //悬浮背景
                            }
                        }
                    },
                    series: series
                };
                myChart.setOption(option)
           },
       }
   }
   </script>