package com.example.usb.map;

import android.graphics.Color;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.view.SurfaceView;

<<<<<<< HEAD
import com.example.usb.About;
=======
import com.example.usb.Drawer;
>>>>>>> 45fa345199d0c35abadd9326d1efd2607f97e25f
import com.example.usb.map.graphelems.Node;

import java.util.ArrayList;

public class MapDrawer {

    //changes the thickness of the line
    int pathThickness = 6;
    Paint colour = new Paint();
    float curRotate;


    public void place(ArrayList<Node> nodes, Canvas canvas, SurfaceView surface){
        colour.setColor(Color.RED);

        for(int currentNode = 0 ; currentNode < nodes.size() - 1; currentNode++){

            float[] center = findCenter(nodes.get(currentNode).getXPos(), nodes.get(currentNode).getYPos(),
                    nodes.get(currentNode+1).getXPos(),nodes.get(currentNode+1).getYPos());

            curRotate = rotation(nodes.get(currentNode).getXPos(), nodes.get(currentNode).getYPos(), nodes.get(currentNode+1).getXPos(),nodes.get(currentNode+1).getYPos());
            canvas.rotate(curRotate, center[0], center[1]);

            canvas.drawRect(center[0]-(pathThickness/2),center[1]-(center[2]/2),center[0]+(pathThickness/2),center[1]+(center[2]/2), colour);

            canvas.rotate(-curRotate, center[0], center[1]);

            canvas.drawCircle(nodes.get(currentNode).getXPos(), nodes.get(currentNode).getYPos(),10, new Paint());
            canvas.drawCircle(nodes.get(currentNode+1).getXPos(),nodes.get(currentNode+1).getYPos(),10, new Paint());
        }
    }

    public float rotation(float x1, float y1, float x2,  float y2){
        float difX = (x1-x2);
        float difY = (y1-y2);

        return (float)(180-Math.toDegrees(Math.atan(difX/difY)));
    }

    public float[] findCenter(float x1, float y1, float x2,  float y2){
        float midX;
        float midY;
        float length;

        midX = (x1+x2)/2;
        midY = (y1+y2)/2;
        length = (float) Math.sqrt(Math.abs((x1-x2)*(x1-x2))+Math.abs((y1-y2)*(y1-y2)));

        return new float[]{midX, midY, length};
    }
}