import ControlPoint from "../Geometry/ControlPoint.js";
import { dataService } from "./DataService.js";
import { mathUtil } from "../Util/MathUtil";
import { edgeService } from "./EdgeService.js";
import { roadService } from "./RoadService.js";

export default class ControlPointService {
  constructor() {}

  //暂时没有添加到vectorData里
  create(position, vectorId) {
    let controlPoint = new ControlPoint(position, vectorId);
    return controlPoint;
  }

  update(realRosition, point1, point2, edge1, edge2, dir1, dir2) {
    let controlPoint = dataService.getControlPoint(
      edge1.vectorId,
      edge2.vectorId
    );
    const line1 = edgeService.getLine(edge1);
    const line2 = edgeService.getLine(edge2);
    let position = mathUtil.getPositionForExtendedLine(point1, point2);
    //更新edge的坐标
    let position1 = mathUtil.getJoinLinePoint(position, line1);
    let position2 = mathUtil.getJoinLinePoint(position, line2);

    //可能position1或者position2不在对应的edge上，这时候需要调换顺序
    if (!this.isPointOnEdgeRay(edge1, dir1, position)) {
      let _position = mathUtil.getPositionForExtendedLine(point2, point1);
      position1 = mathUtil.getJoinLinePoint(_position, line1);
    }

    if (!this.isPointOnEdgeRay(edge2, dir2, position)) {
      let _position = mathUtil.getPositionForExtendedLine(point2, point1);
      position2 = mathUtil.getJoinLinePoint(_position, line2);
    }

    if (controlPoint == null) {
      //新建控制点
      controlPoint = this.create(realRosition);
      //需要删除之前的控制点
      dataService.deleteControlPointForEdge(edge1.vectorId, dir1);
      dataService.deleteControlPointForEdge(edge2.vectorId, dir2);
      dataService.deleteControlPoint(edge1.vectorId, edge2.vectorId);
      //设置控制点的信息
      controlPoint.setEdgeInfo(edge1.vectorId, dir1, edge2.vectorId, dir2);
      //添加到数据集里
      dataService.addControlPoint(controlPoint);
    }
    //更新控制点坐标
    else {
      controlPoint.setPosition(realRosition);
    }
    edge1.setPosition(position1, dir1);
    edge2.setPosition(position2, dir2);
    controlPoint.setExtremePoint();
  }

  //newleft,end------------road.leftEdgeId,end
  replaceEdgeId(controlPoint, oldEdgeId, newEdgeId) {
    if (controlPoint == null) {
      return;
    }
    dataService.deleteControlPoint(
      controlPoint.edgeInfo1.id,
      controlPoint.edgeInfo2.id
    );
    if (controlPoint.edgeInfo1.id == oldEdgeId) {
      controlPoint.edgeInfo1.id = newEdgeId;
    } else if (controlPoint.edgeInfo2.id == oldEdgeId) {
      controlPoint.edgeInfo2.id = newEdgeId;
    }
    dataService.addControlPoint(controlPoint);
  }

  //角度小，road宽的时候，可能edge顺序会倒，但是road的顺序不会
  isPointOnEdgeRay(edge, dir, position) {
    let road = dataService.getRoad(edge.parent);
    let point1, point2;
    if (dir == "start") {
      point1 = dataService.getRoadPoint(road.startId);
      point2 = dataService.getRoadPoint(road.endId);
    } else if (dir == "end") {
      point1 = dataService.getRoadPoint(road.endId);
      point2 = dataService.getRoadPoint(road.startId);
    }

    position = mathUtil.getJoinLinePoint(
      position,
      roadService.getMidLine(road)
    );

    let v1 = {
      x: position.x - point1.x,
      y: position.y - point1.y,
    };

    let v2 = {
      x: point2.x - point1.x,
      y: point2.y - point1.y,
    };

    let v = {
      x: v1.x + v2.x,
      y: v1.y + v2.y,
    };

    let d = mathUtil.getDistance(v, { x: 0, y: 0 });
    let d1 = mathUtil.getDistance(position, point1);
    let d2 = mathUtil.getDistance(point2, point1);

    if (Math.abs(d - d1 - d2) < 0.2) {
      return true;
    } else {
      return false;
    }
  }

  updateForMovePoint(controlPointId, newPosition) {
    let controlPoint = dataService.getControlPoint2(controlPointId);
    mathUtil.clonePoint(controlPoint.extremePoint, newPosition);
    controlPoint.setCurves();
  }
}

const controlPointService = new ControlPointService();
export { controlPointService };