package dk.thoerup.friendradar;


import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.location.Location;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

//public class RadarView extends View {
public class RadarView extends SurfaceView implements SurfaceHolder.Callback, Runnable {	
	int angle = 0;
	Paint p = new Paint();
	Paint p2 = new Paint();
	Paint p3 = new Paint();
	
	SurfaceHolder surfaceHolder;
	int distanceBase = 500;
	
	String distanceText1;
	String distanceText2;
	String distanceText3;
	String distanceText4;
	
	float textWidth1;
	float textWidth2;
	float textWidth3;
	float textWidth4;
	
	String gpsText = "-";	
	Location currentLocation;
	
	int heading;
	String headingText = "-";
	

	int width; 
	int height; 
	int hcenter; 
	int vcenter; 
	

	boolean mRun = true;
	
	Thread t;
	
	public RadarView(Context context) {
		super(context);
		init();
	}

	
	public RadarView(Context context, AttributeSet attr) {
		super(context,attr);
		init();
	}
	
	public RadarView(Context context, AttributeSet attr, int defstyle) {
		super(context,attr, defstyle);
		init();
	}
	

	void init() {
		p.setColor(0xaa00aa00);//Dark green
		p.setStrokeWidth(2);
		p.setStyle(Paint.Style.STROKE);
		p.setAntiAlias(true);
		p.setTextSize(1);
		
		p2.setStrokeWidth(2);
		p2.setColor(0xff00cc00);//Dark green
		p2.setStyle(Paint.Style.STROKE);
		//p2.setAntiAlias(true);

		
		p3.setStrokeWidth(2);
		p3.setColor(0xff00cc00);//Dark green
		p3.setStyle(Paint.Style.FILL);		

		surfaceHolder = this.getHolder();
		surfaceHolder.addCallback(this);
		
		t = new Thread(this);
		
		updateDistanceTexts();
	}
	
	protected void myDraw(Canvas canvas) {
	
		canvas.drawColor(0xff000000);
		canvas.drawLine(hcenter-5, vcenter-5, hcenter+5, vcenter+5, p);
		canvas.drawLine(hcenter-5, vcenter+5, hcenter+5, vcenter-5, p);
		canvas.drawCircle(hcenter, vcenter+5, 40, p);
		canvas.drawCircle(hcenter, vcenter+5, 80, p);
		canvas.drawCircle(hcenter, vcenter+5, 115, p);
		canvas.drawCircle(hcenter, vcenter+5, 150, p);
		
		canvas.drawText(distanceText1, (width-textWidth1)/2, vcenter+40+6, p3);
		canvas.drawText(distanceText2, (width-textWidth2)/2, vcenter+80+6, p3);
		canvas.drawText(distanceText3, (width-textWidth3)/2, vcenter+115+6, p3);
		canvas.drawText(distanceText4, (width-textWidth4)/2, vcenter+150+6, p3);

		final float correction = 5;
		final float lineLength = 150;
		angle -= 6;
		
		
		double base = (Math.sin(angle/360.0)*lineLength) + (float)hcenter;
		double height = (Math.cos(angle/360.0)*lineLength) + (float)vcenter;
		height += correction;
		
		
		canvas.drawLine(hcenter, vcenter, (float)base, (float)height, p2);
		
		
		
		//left,top,right,bottom
		canvas.drawRoundRect( new RectF(20,360,180,400), 10, 10, p);
		canvas.drawLine(100, 360, 100, 400, p);
		
		canvas.drawLine(45, 380, 75, 380, p); // Minus
		canvas.drawLine(125, 380, 155, 380, p); // Plus
		canvas.drawLine(140, 365, 140, 395, p); // Plus

		// Gps status
		canvas.drawText("Gps accuracy", 10, 20,p3);
		canvas.drawText(gpsText, 10, 40, p3);
		
		// Heading
		canvas.drawText("Heading", 270, 20, p3);
		canvas.drawText(headingText, 280, 40, p3);
				
		
		drawLocations(canvas);
	}


	@Override //surfaceholder.CallBack
	public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
		Log.i("surfacChaned()","-");
	}


	@Override
	public void surfaceCreated(SurfaceHolder holder) { //surfaceholder.CallBack
		Log.i("surfacCreated()","-");
				
		width = this.getWidth();
		height = this.getHeight();
		hcenter = width / 2;
		vcenter = hcenter + 20;
		
		t.start();
	}


	@Override
	public void surfaceDestroyed(SurfaceHolder holder) { //surfaceholder.CallBack
		Log.i("surfacDestroyed()","-");
        mRun = false;
	}
	
    public void run() {
        while (mRun) {
            Canvas c = null;
            try {
                c = surfaceHolder.lockCanvas(null);
                synchronized (surfaceHolder) {
                    //if (mMode == STATE_RUNNING) 
                    //	updatePhysics();
                    myDraw(c);
                }
            } finally {
                // do this in a finally so that if an exception is thrown
                // during the above, we don't leave the Surface in an
                // inconsistent state
                if (c != null) {
                    surfaceHolder.unlockCanvasAndPost(c);
                }
            }
            try {
            	Thread.sleep(20);
            } catch (InterruptedException e) {}
        }
    }

    

	@Override
	public boolean onTouchEvent(MotionEvent event) {
		float x = event.getX();
		float y = event.getY();	
		Log.i("TouchEvent", "Coords: " + x + "," + y );
		if (x>25 && x<95 && y>360 && y<400) { //zoom out
			Log.i("Button", "Zoom Out");
			if (distanceBase < 16000) {
				distanceBase *= 2;
				updateDistanceTexts();
			}
		}
		
		if (x>105 && x<175 && y>360 && y<400) {
			Log.i("Button", "Zoom In"); // zoom in
			if (distanceBase > 125) {
				distanceBase /= 2;
				updateDistanceTexts();
			}
		}

	
		return false;
	}
	
	void updateDistanceTexts() {
		distanceText1 = formatLength(distanceBase);
		distanceText2 = formatLength(distanceBase*2);
		distanceText3 = formatLength(distanceBase*3);
		distanceText4 = formatLength(distanceBase*4);
		
		textWidth1 = textWidth(distanceText1);
		textWidth2 = textWidth(distanceText2);
		textWidth3 = textWidth(distanceText3);
		textWidth4 = textWidth(distanceText4);
		
	}
	
	float textWidth(String text) {
		float[] width = { 0.0f };
		p3.breakText(text, true, 200, width);
		return width[0];
		
	}
	
	String formatLength(int meters) {
		if (meters == 1500) //yuck, special cases !!!
			return "1.5 km";
		
		if (meters>=1000)
			return "" + (meters/1000) + " km";
		else
			return "" + meters + " m";
	}
	
	void setCurrentLocation(Location loc) {
		currentLocation = loc;
		gpsText = formatLength( (int)loc.getAccuracy());
	}
	
	void setHeading(int head) {
		heading = head;
		headingText = "" + head;
	}
	
	void drawLocations(Canvas canvas) {
		if (currentLocation != null) {
			Location loc = new Location("gps");
			loc.setLatitude(56.394908); //Hedemøllevej
			loc.setLongitude(9.666356); 
			
	//		loc.setLatitude(56.298307); //Kongensbro
	//		loc.setLongitude(9.669293);
			
			loc.setLatitude(56.398577); //Langå
			loc.setLongitude(9.899515);
			
			
			drawLocation(canvas, loc);
		}
	}
	
	void drawLocation(Canvas canvas, Location location) {
		
		float bearing = currentLocation.bearingTo(location);
		float distance = currentLocation.distanceTo(location);
		
		//Log.e("Bearing to", ""+bearing);
		//Log.e("Distance to", ""+distance);
		
		bearing -= (float) heading;
		
		if (distance <= (distanceBase*4)) {
			
			//convert from degrees to radians
			double bearingRad = Math.toRadians(bearing-90);
			
			double hypotenuse = (distance / (distanceBase*4.0)) * 150.0;
			double vertCathesis = Math.sin(bearingRad)*hypotenuse;
			double horzCathesis = Math.cos(bearingRad)*hypotenuse;

			//vertCathesis *= -1.0;
			
			vertCathesis += vcenter;
			horzCathesis += hcenter;
			
			canvas.drawCircle( (float)horzCathesis, (float)vertCathesis, 3, p3);
			
		}
	}
	
}