using UnityEngine;
using System.Collections;

public class CameraMotionController : MonoBehaviour {
	public GameObject player;
	public float staticRectangleWidth = 200;
	public float staticRectangleHeight = 200;
	public bool drawDebug = true;
	private Camera camera;
	private Rect staticRect;
	public bool SpritePixels = true;
	public PixelPerfectCamera pixelController;


	// Use this for initialization
	void Start () {
		camera = gameObject.GetComponent<Camera>();
		staticRect = new Rect();
	}
	
	// Update is called once per frame
	void LateUpdate () {
		UpdateRectangle();
		MoveCameraToPlayer();
	}

    void OnLevelWasLoaded(int level) {
        Debug.LogWarning("Loaded level: " + level);
    }

	void MoveCameraToPlayer(){
		var pb = player.GetComponent<SpriteRenderer>().bounds;
		var playerRect = Tools.BoundsToRect(pb);

		Vector3 offset = Vector3.zero;

		var rightOffset = staticRect.xMax - playerRect.xMax;
		var leftOffset = staticRect.xMin - playerRect.xMin;

		var topOffset = staticRect.yMax - playerRect.yMax;
		var bottomOffset = staticRect.yMin - playerRect.yMin;

		if(rightOffset < 0){
			offset -= Vector3.right * rightOffset;
		}

		if(leftOffset > 0){
			offset -= Vector3.right * leftOffset;
		}

		if(bottomOffset > 0){
			offset -= Vector3.up * bottomOffset;
		}

		if(topOffset < 0){
			offset -= Vector3.up * topOffset;
		}

		transform.position += offset * Time.deltaTime * 5;

	}

	void UpdateRectangle(){
		float camUnitHeight = camera.orthographicSize * 2;
		float camPixelsToUnits = camUnitHeight / camera.pixelHeight;



		float unitHW = staticRectangleWidth * 0.5f * camPixelsToUnits;
		float unitHH = staticRectangleHeight * 0.5f * camPixelsToUnits;

		if(SpritePixels && pixelController != null){
			unitHW *= pixelController.zoom;	
			unitHH *= pixelController.zoom;
		}

		Vector2 center = transform.position;

		staticRect.x = center.x - unitHW;
		staticRect.y = center.y - unitHH;
		staticRect.width = unitHW * 2;
		staticRect.height = unitHH * 2;


	}

	void OnDrawGizmosSelected(){
		if(staticRect == null){
			staticRect = new Rect();
		}
		if(camera == null){
			camera = gameObject.GetComponent<Camera>();
		}
		UpdateRectangle();
		if(drawDebug){

			var pb = player.GetComponent<SpriteRenderer>().bounds;
			var rect = new Rect(pb.min.x, pb.min.y, pb.max.x - pb.min.x, pb.max.y - pb.min.y);
			//Tools.BeginGui(false);
			bool i = staticRect.Overlaps(rect);
			Tools.DrawRectangle(staticRect, i ? new Color(0,1,0,0.3f) : new Color(1,0,0,0.3f));
			//Tools.EndGui();
		}
	}
}