using UnityEngine;
using System.Collections;


/// <summary>
/// this class shows one way to setup a virtual control setup (d-pad and two buttons). It illustrates a bunch of concepts
/// including recognizer layering (overlapping "up" button to get diagonals) and also how to detect only in this frame
/// if a button is down (attack button).
/// </summary>
public class VirtualControls
{
	public bool leftDown, upDown, rightDown, attackDown, jumpDown;

	private float buttonWidth = 24f;
	private float buttonHeight = 30f;


	private TKAnyTouchRecognizer _leftRecognizer;
	private TKAnyTouchRecognizer _rightRecognizer;
	private TKAnyTouchRecognizer _upRecognizer;

	private TKButtonRecognizer _attackRecognizer;
	private TKButtonRecognizer _jumpRecognizer;

	public TKRect leftRect { get { return _leftRecognizer.boundaryFrame.Value; } }
	public TKRect rightRect { get { return _rightRecognizer.boundaryFrame.Value; } }
	public TKRect upRect { get { return _upRecognizer.boundaryFrame.Value; } }

	public TKRect attackRect { get { return _attackRecognizer.boundaryFrame.Value; } }
	public TKRect jumpRect { get { return _jumpRecognizer.boundaryFrame.Value; } }


	public VirtualControls()
	{
		// if we have something like the iPad with a squarish aspect ratio adjust the button height to be a bit smaller
		if( Camera.main.aspect < 1.7f )
		{
			buttonHeight *= Camera.main.aspect / 1.7f;
			buttonWidth *= Camera.main.aspect / 1.7f;
		}
		setupRecognizers();
	}


	public void update()
	{
		// reset our state
		leftDown = upDown = rightDown = attackDown = jumpDown = false;

		// first update our touches then use our recognizers to set our state
		TouchKit.updateTouches();

		leftDown = _leftRecognizer.state == TKGestureRecognizerState.RecognizedAndStillRecognizing;
		rightDown = _rightRecognizer.state == TKGestureRecognizerState.RecognizedAndStillRecognizing;
		upDown = _upRecognizer.state == TKGestureRecognizerState.RecognizedAndStillRecognizing;

		jumpDown = _jumpRecognizer.state == TKGestureRecognizerState.RecognizedAndStillRecognizing;
	}


	public void createDebugQuads()
	{
		createQuadButton( leftRect, Color.green );
		createQuadButton( rightRect, Color.green );
		createQuadButton( upRect, Color.white );

		createQuadButton( attackRect, Color.cyan );
		createQuadButton( jumpRect, Color.magenta );
	}


	void createQuadButton( TKRect rect, Color color )
	{
		color.a = 0.2f;

		// find the center point in Unity units
		var center = Camera.main.ScreenToWorldPoint( rect.center );
		center.z = 0;

		// create the quad button
		var button = GameObject.CreatePrimitive( PrimitiveType.Quad );
		button.transform.position = center;
		button.GetComponent<Renderer>().material.shader = Shader.Find( "Sprites/Default" );
		button.GetComponent<Renderer>().material.color = color;

		// scale the quad button accordingly
		button.transform.localScale = new Vector3
		(
			TouchKit.instance.pixelsToUnityUnitsMultiplier.x * rect.width,
			TouchKit.instance.pixelsToUnityUnitsMultiplier.y * rect.height
		);
	}


	void setupRecognizers()
	{
		// left button
		_leftRecognizer = new TKAnyTouchRecognizer( new TKRect( 0f, 0f, buttonWidth, buttonHeight ) );
		TouchKit.addGestureRecognizer( _leftRecognizer );


		// right button
		_rightRecognizer = new TKAnyTouchRecognizer( new TKRect( buttonWidth + 1f, 0f, buttonWidth, buttonHeight ) );
		TouchKit.addGestureRecognizer( _rightRecognizer );


		// up button. we place it 70% of the way up the other two buttons allowing some overlap
		_upRecognizer = new TKAnyTouchRecognizer( new TKRect( 0f, buttonHeight * 0.7f, buttonWidth * 2f + 1f, 20f ) );
		TouchKit.addGestureRecognizer( _upRecognizer );


		// attack button. we use the onSelectedEvent here because we only want to know the exact frame it was pressed
		_attackRecognizer = new TKButtonRecognizer( new TKRect( TouchKit.instance.designTimeResolution.x - buttonWidth * 2f, 0, buttonWidth, buttonHeight ), 0f );
		_attackRecognizer.onSelectedEvent += ( r ) =>
		{
			attackDown = true;
		};
		TouchKit.addGestureRecognizer( _attackRecognizer );


		// jump button
		_jumpRecognizer = new TKButtonRecognizer( new TKRect( TouchKit.instance.designTimeResolution.x - buttonWidth, 0, buttonWidth, buttonHeight ), 0f );
		TouchKit.addGestureRecognizer( _jumpRecognizer );
	}

}