#ifndef VIDEO_H
#define VIDEO_H

#ifdef BUILD_SDL
#include <SDL.h>
#include <chrono>
#else
#include <cstdint>
#endif

#include "../graphics/Rect.h"

#define SCREEN_WIDTH 320
#define SCREEN_HEIGHT 200
#define MAX_UPDATE_RECT_INDEX 255

class Video {
	public:
		struct PaletteEntry {
			uint8_t r{0}, g{0}, b{0};
		};

		Video();
		~Video();

		void Enter();
		void Exit();

		void SetPaletteEntry(uint8_t index, PaletteEntry entry);
		PaletteEntry GetPaletteEntry(uint8_t index);

		void SetPaletteEntry(uint8_t index, PaletteEntry *entry);
		void GetPaletteEntry(uint8_t index, PaletteEntry *entry);

		void *GetFB();

		void WaitForVerticalSync();

		void UpdateRect(const Rect &rect);
		void Flip();
	private:
		uint8_t _oldMode{0};
		PaletteEntry _oldPalette[256]{};
#ifdef BUILD_SDL
		SDL_Window *_window;
		SDL_Surface *_windowSurface;
		SDL_Surface *_fb;
		PaletteEntry _palette[256]{};
		std::chrono::steady_clock::time_point _lastUpdate{std::chrono::steady_clock::now()};
#else
		uint8_t *_fb{nullptr};
#endif
		uint8_t _renderBuffer[SCREEN_WIDTH*SCREEN_HEIGHT]{};
		Rect _updatedRects[MAX_UPDATE_RECT_INDEX+1];
		unsigned _updateRectIndex{0};

		void SetMode(uint8_t mode);
		uint8_t GetMode();
};

extern Video video;

#endif