package com.example.usb.map;

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

import com.example.usb.Drawer;
import com.example.usb.map.graphelems.ElevationNode;
import com.example.usb.map.graphelems.Node;

import java.util.ArrayList;

/**
 * Class used to draw on the surface view containing the map canvas
 *
 * @author Miles Nelson
 */
public class MapDrawer {

    //changes the thickness of the line
    private int pathThickness = 6;
    private Paint red = new Paint();


    private float curRotate;

    // Places two nodes on a map and draws a line between them
    public void place(ArrayList<Node> nodes, Canvas canvas, SurfaceView surface){
        red.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), red);

            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);
<<<<<<< HEAD
        
        if(difX == 0 && difY == 0){
            return 0;
        }
        
=======

        if (difX == 0 && difY == 0){
            return 0;
        }

>>>>>>> 7dfedf4b18e1efe0bdaaf9a14116265324769e07
        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};
    }
}