package com.demo.navtogether;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.Point;
import android.os.Bundle;
import android.view.View;
import android.view.ViewTreeObserver;
import android.widget.Button;
import android.widget.Toast;

import com.demo.navtogether.utils.DijkstraUtils;
import com.demo.navtogether.utils.PathPlan;
import com.demo.navtogether.utils.TriangleUtils;

import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.HashMap;

public class MainActivity extends AppCompatActivity {
    PlanPathView planPathView;
    Button btnRefresh,btnDrawD,btnDrawC;
    boolean animD,animC;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        planPathView = findViewById(R.id.planpath);
        btnRefresh = findViewById(R.id.btn_refresh);
        btnDrawD = findViewById(R.id.btn_draw_dijkstra);
        btnDrawC = findViewById(R.id.btn_draw_custom);

        ViewTreeObserver vto = planPathView.getViewTreeObserver();
        vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
            public boolean onPreDraw() {
                int height = planPathView.getMeasuredHeight();
                int width = planPathView.getMeasuredWidth();

                ArrayList<PathPlan.Place> places = new ArrayList<>();
                places.add(new PathPlan.Place("A",random(width,height),0));
                places.add(new PathPlan.Place("B",random(width,height),0));
                places.add(new PathPlan.Place("C",random(width,height),0));
                places.add(new PathPlan.Place("D",random(width,height),0));
                places.add(new PathPlan.Place("E",random(width,height),0));
                places.add(new PathPlan.Place("F",random(width,height),0));
                planPathView.setPoints(places);

                planPathView.getViewTreeObserver().removeOnPreDrawListener(this);
                return true;
            }
        });
    }
    PlanPathView.AnimatorListener listener = new PlanPathView.AnimatorListener() {
        @Override
        public void onAnimation(int value) {
            btnRefresh.setEnabled(false);
            btnDrawD.setEnabled(false);
            btnDrawC.setEnabled(false);
        }

        @Override
        public void onFinish() {
            btnRefresh.setEnabled(true);
            btnDrawD.setEnabled(true);
            btnDrawC.setEnabled(true);
        }
    };

    /**
     * 创建随机位置
     * @param maxX
     * @param maxY
     * @return
     */
    public Point random(int maxX,int maxY){
        int marginX = (int) (getResources().getDisplayMetrics() .density*15)*2;
        Point point = new Point();

        point.x  = (int) (Math.random()*(maxX-marginX))+(marginX/2);
        point.y  = (int) (Math.random()*(maxY-marginX))+(marginX/2);

        return point;
    }

    /**
     * 迪杰斯特拉算法画线
     * @param view
     */
    public void drawLine(View view){
        planPathView.clearLines();
        //执行算法，返回位置路线集合
        ArrayList<PathPlan.Place> excute = new DijkstraUtils(PathPlan.intPoints(planPathView.getPoints())).excute(planPathView.getPoints().get(2));
        ArrayList<PlanPathView.Line> lines = new ArrayList<>();
        for(int i = 0 ; i < excute.size() -1; i ++){
            //生成路线
            lines.add(new PlanPathView.Line(excute.get(i).point,excute.get(i+1).point,excute.get(i+1).distance));
            System.out.println(excute.get(i)+" 距离："+(i == excute.size() -1?"": TriangleUtils.getLengthOfSide(excute.get(i).point,excute.get(i+1).point)) +" "+excute.get(i).distance);
        }
        if(animD){
            planPathView.drawLine(lines);
        }else {
            animD = true;
            planPathView.drawAnimLine(lines, listener);
        }
    }

    int index = 0 ;

    /**
     * 自定义算法画线
     * @param view
     */
    public void drawLineCustom(View view){
        planPathView.clearLines();
        System.out.println("drawLineCustom " );
        HashMap<PathPlan.Place, PathPlan.Distance> distanceHashMap = PathPlan.intPoints(planPathView.getPoints());
        ArrayList<ArrayList<PathPlan.Place>> arrayLists = new DijkstraUtils(distanceHashMap).initCustomPathPlan(planPathView.getPoints().get(2), null);
        if(arrayLists.size()>1){
            Toast.makeText(this,"当前有"+arrayLists.size()+"路线规划",Toast.LENGTH_SHORT).show();
        }
        ArrayList<PlanPathView.Line> lines = new ArrayList<>();
        DecimalFormat df = new DecimalFormat("#.00");
        double  totalLength = 0 ;
        ArrayList<PathPlan.Place> arrayList = arrayLists.get(index % arrayLists.size());
        for(int i = 0 ; i < arrayList.size() -1; i ++){
            lines.add(new PlanPathView.Line(arrayList.get(i).point,arrayList.get(i+1).point,arrayList.get(i+1).distance));
            totalLength +=Double.parseDouble(df.format(arrayList.get(i).distance));
            System.out.println(arrayList.get(i)+" 距离："+(i == arrayList.size() -1?"": TriangleUtils.getLengthOfSide(arrayList.get(i).point,arrayList.get(i+1).point)) +" "+arrayList.get(i).distance);
        }
        index++;
        if(animC){
            planPathView.drawLine(lines);
        }else {
            animC = true;
            planPathView.drawAnimLine(lines, listener);
        }
    }


    public void refresh(View view) {
        planPathView.clear();
        int width = planPathView.getWidth();
        int height = planPathView.getHeight();
        ArrayList<PathPlan.Place> places = new ArrayList<>();
        places.add(new PathPlan.Place("A",random(width,height),0));
        places.add(new PathPlan.Place("B",random(width,height),0));
        places.add(new PathPlan.Place("C",random(width,height),0));
        places.add(new PathPlan.Place("D",random(width,height),0));
        places.add(new PathPlan.Place("E",random(width,height),0));
        places.add(new PathPlan.Place("F",random(width,height),0));
        places.add(new PathPlan.Place("G",random(width,height),0));
        places.add(new PathPlan.Place("H",random(width,height),0));
        animD = false;
        animC = false;
        planPathView.setAnimPoints(places,listener);
    }
}