#ifndef SPRITE_H
#define SPRITE_H

#include <cmath>

namespace Engine {

class Sprite {
	public:
		Sprite() {
			mScale = 1.;
			mWidth = 0;
			mHeight = 0;
			mGlTextureName = 0;

			mAnimation = false;
			mSubSpriteCount = 1;
		}

		bool LoadFromPNG (const char *filename);
		void DrawAt (float xpos, float ypos, float zpos);
		void DrawAt2D (float xpos, float ypos);
		unsigned int GetWidth() { return mWidth; };
		unsigned int GetHeight() { return mHeight; };

		void SetScale (float scale) { mScale = scale; };

		void SetAnimation (int frame_count, float frame_rate) {
			mAnimation = true;
			mAnimationFrameCount = frame_count;
			mAnimationFrameRate = frame_rate;
			mAnimationTimer = 0.;
			mWidth = static_cast<unsigned int>(ceil (static_cast<float> (mWidth / mAnimationFrameCount)));
		}
		void ResetAnimation () {
			mAnimationTimer = 0.;
		}
		void UpdateAnimation (float seconds) {
			mAnimationTimer += seconds;
			while (mAnimationTimer >= mAnimationFrameCount / mAnimationFrameRate) {
				mAnimationTimer -= mAnimationFrameCount / mAnimationFrameRate;
			}
		}

		void SetSubSpriteCount (const unsigned int count) {
			mSubSpriteCount = count;
			mWidth = static_cast<unsigned int>(ceil (static_cast<float> (mWidth / mSubSpriteCount)));
		}
		unsigned int GetSubSpriteCount () const {
			return mSubSpriteCount;
		}
		void DrawSubAt (unsigned int index, float xpos, float ypos, float zpos);

	private:
		float mScale;

		unsigned int mWidth;
		unsigned int mHeight;
		unsigned int mGlTextureName;

		unsigned int mSubSpriteCount;

		bool mAnimation;
		int mAnimationFrameCount;
		float mAnimationTimer;
		float mAnimationFrameRate;
};

}

#endif /* SPRITE_H */