#ifndef _GAME_ENGINE_H_
#define _GAME_ENGINE_H_

#include <glib.h>
#include <glib-object.h>
#include <libtetringo/board.h>
#include <libtetringo/ruleset.h>

typedef struct _TetringoGameEngine      TetringoGameEngine;
typedef struct _TetringoGameEngineIface TetringoGameEngineIface;

struct _TetringoGameEngineIface
{
	GTypeInterface base_iface;

	void (*start)(TetringoGameEngine *game_engine);
	void (*stop)(TetringoGameEngine *game_engine);
	gboolean (*is_running)(TetringoGameEngine *game_engine);
	gboolean (*place_piece)(TetringoGameEngine *game_engine,
							guint row, guint col);
	TetringoBoard *(*get_game_board)(const TetringoGameEngine *game_engine);
	TetringoBoard *(*get_cur_piece_board)(
		const TetringoGameEngine *game_engine);
	TetringoBoard *(*get_piece_board)(const TetringoGameEngine *game_engine,
									  guint piece);
	guint (*get_piece_time_remaining)(const TetringoGameEngine *game_engine);
	Piece (*get_cur_piece)(const TetringoGameEngine *game_engine);
	TetringoRuleSet *(*get_ruleset)(const TetringoGameEngine *game_engine);

	/* Signals */
	void (*started)(TetringoGameEngine *game_engine);
	void (*stopped)(TetringoGameEngine *game_engine);
	void (*tick)(TetringoGameEngine *game_engine);
	void (*piece_changed)(TetringoGameEngine *game_engine);
	void (*score_updated)(TetringoGameEngine *game_engine, guint score,
						  gboolean penalty);
	void (*block_placed)(TetringoGameEngine *game_engine,
						 guint row, guint col);
};

#define TETRINGO_TYPE_GAME_ENGINE (tetringo_game_engine_get_type())
#define TETRINGO_GAME_ENGINE(obj) \
		(G_TYPE_CHECK_INSTANCE_CAST((obj), TETRINGO_TYPE_GAME_ENGINE, TetringoGameEngine))
#define TETRINGO_GAME_ENGINE_IFACE(klass) \
		(G_TYPE_CHECK_CLASS_CAST((klass), TETRINGO_TYPE_GAME_ENGINE, TetringoGameEngineIface))
#define TETRINGO_IS_GAME_ENGINE(obj) \
		(G_TYPE_CHECK_INSTANCE_TYPE((obj), TETRINGO_TYPE_GAME_ENGINE))
#define TETRINGO_IS_GAME_ENGINE_IFACE(klass) \
		(G_TYPE_CHECK_IFACE_TYPE((klass), TETRINGO_TYPE_GAME_ENGINE))
#define TETRINGO_GAME_ENGINE_GET_IFACE(obj) \
		(G_TYPE_INSTANCE_GET_INTERFACE ((obj), TETRINGO_TYPE_GAME_ENGINE, TetringoGameEngineIface))

GType tetringo_game_engine_get_type(void);

void tetringo_game_engine_start(TetringoGameEngine *game_engine);
void tetringo_game_engine_stop(TetringoGameEngine *game_engine);
gboolean tetringo_game_engine_is_running(TetringoGameEngine *game_engine);
gboolean tetringo_game_engine_place_piece(TetringoGameEngine *game_engine,
										  guint row, guint col);

TetringoBoard *tetringo_game_engine_get_game_board(
	const TetringoGameEngine *game_engine);
TetringoBoard *tetringo_game_engine_get_cur_piece_board(
	const TetringoGameEngine *game_engine);
TetringoBoard *tetringo_game_engine_get_piece_board(
	const TetringoGameEngine *game_engine, guint piece);
guint tetringo_game_engine_get_piece_time_remaining(
	const TetringoGameEngine *game_engine);
Piece tetringo_game_engine_get_cur_piece(
	const TetringoGameEngine *game_engine);
TetringoRuleSet *tetringo_game_engine_get_ruleset(
	const TetringoGameEngine *game_engine);

void tetringo_set_game_engine(TetringoGameEngine *game_engine);
TetringoGameEngine *tetringo_get_game_engine(void);

#endif /* _GAME_ENGINE_H_ */