import { map } from './index_old';
import calculate from './calculate';
import { getHexColor } from '../color';

var _polylineArr = [];

function newPolyline(path, color) {
  // eslint-disable-next-line no-undef
  return new AMap.Polyline({
    path: path,
    strokeStyle: 'solid',
    isOutline: true,
    borderWeight: 1,
    outlineColor: 'white',
    strokeWeight: 4, // 线条宽度，默认为 1
    strokeColor: color, // 线条颜色
    lineJoin: 'round', // 折线拐点连接处样式
    showDir: true
  });
}

export default {
  drawLine(fDatas, factor) {
    const lnglats_GD = fDatas.lnglats_GD;
    const colors = factor.colors;

    if (_polylineArr) {
      map.remove(_polylineArr);
      _polylineArr = [];
    }
    var path = calculate.parse2LngLat(lnglats_GD);

    let sIndex = 0;
    for (let i = 1; i < path.length; i++) {
      var r = lnglats_GD[i];
      var lastP = lnglats_GD[i - 1];
      // eslint-disable-next-line no-undef
      var distance = AMap.GeometryUtil.distance(r, lastP);
      const c = colors[i];
      const lastC = colors[i - 1];
      if (distance > 500 || c != lastC) {
        let _path, _color;
        _path = path.slice(sIndex, i);
        _color = getHexColor(
          lastC.map((v, index) => {
            if (index < lastC.length - 1) {
              return v * 255;
            } else {
              return v;
            }
          })
        );
        // 当两点距离超过500时，认为两点不连续，不绘制连线
        if (distance > 500) {
          sIndex = i;
        } else {
          sIndex = i - 1;
        }

        // 创建折线实例
        const polyline = newPolyline(_path, _color);
        _polylineArr.push(polyline);
      }
    }
    if (sIndex < path.length - 1) {
      const c = colors[path.length - 1];
      const _path = path.slice(sIndex, path.length);
      const _color = getHexColor(
        c.map((v, index) => {
          if (index < c.length - 1) {
            return v * 255;
          } else {
            return v;
          }
        })
      );
      const polyline = newPolyline(_path, _color);
      _polylineArr.push(polyline);
    }
    // 将折线添加至地图实例
    map.add(_polylineArr);
    return _polylineArr;
  }
};