/*! \file utils.h
 *  \brief Headers of helper functions.
 */
/*
 * Copyright (c) Sebastian Krzyszkowiak <dos@dosowisko.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#ifndef LIBSUPERDERPY_UTILS_H
#define LIBSUPERDERPY_UTILS_H

#include <allegro5/allegro.h>
#include <allegro5/allegro_font.h>
#include "libsuperderpy.h"

#ifdef ALLEGRO_WINDOWS
#define LIBRARY_EXTENSION ".dll"
#elif ALLEGRO_MACOSX
#define LIBRARY_EXTENTION ".dylib"
#else
#define LIBRARY_EXTENSION ".so"
#endif

void SetupViewport(struct Game *game);
void Console_Unload(struct Game *game);
void DrawConsole(struct Game *game);

void AdvanceLevel(struct Game *game, bool won);
void ShowLevelStatistics(struct Game *game);

/*! \brief Draws rectangle filled with vertical gradient. */
void DrawVerticalGradientRect(float x, float y, float w, float h, ALLEGRO_COLOR top, ALLEGRO_COLOR bottom);
/*! \brief Draws rectangle filled with horizontal gradient. */
void DrawHorizontalGradientRect(float x, float y, float w, float h, ALLEGRO_COLOR left, ALLEGRO_COLOR right);
/*! \brief Draws text with shadow.
 *
 * Draws given text two times: once with color (0,0,0,128) and 1px off in both x and y axis,
 * and second time with actual given color and position.
 */
void DrawTextWithShadow(ALLEGRO_FONT *font, ALLEGRO_COLOR color, float x, float y, int flags, char const *text);

/*! \brief Loads bitmap into memory and scales it with software linear filtering. */
ALLEGRO_BITMAP* LoadScaledBitmap(struct Game *game, char* filename, int width, int height);

/*! \brief Finds path for data file. */
char* GetDataFilePath(struct Game *game, char* filename);

char* GetLibFilePath(struct Game *game, char* filename);

/*! \brief Print some message on game console.
 *
 * Draws message on console bitmap, so it'll be displayed when calling DrawConsole.
 * If game->debug is true, then it also prints given message on stdout.
 * It needs to be called in printf style.
 */
void PrintConsole(struct Game *game, char* format, ...);

void FatalError(struct Game *game, bool exit, char* format, ...);

/*! \brief Structure representing one spritesheet for character animation. */
struct Spritesheet {
		char* name; /*!< Name of the spritesheet (used in file paths). */
		ALLEGRO_BITMAP* bitmap; /*!< Spritesheet bitmap. */
		int rows; /*!< Number of rows in the spritesheet. */
		int cols; /*!< Number of columns in the spritesheet. */
		int blanks; /*!< Number of blank frames at the end of the spritesheet. */
		int width;
		int height;
		int delay;
		bool kill;
		float scale; /*!< Scale modifier of the frame. */
		char* successor; /*!< Name of animation successor. If it's not blank, then animation will be played only once. */
		struct Spritesheet* next; /*!< Next spritesheet in the queue. */
};

/*! \brief Structure representing one visible character. */
struct Character {
		char* name; /*!< Name of the character (used in file paths). */
		struct Spritesheet *spritesheet; /*!< Current spritesheet used by character. */
		struct Spritesheet *spritesheets; /*!< List of all spritesheets registered to character. */
		char* successor;
		ALLEGRO_BITMAP* bitmap;
		int pos; /*!< Current spritesheet position. */
		int pos_tmp; /*!< A counter used to slow down spritesheet animation. */
		float x; /*!< Horizontal position of character. */
		float y; /*!< Vertical position of character. */
		float angle; /*!< Characters display angle (radians). */
		void* data; /*!< Additional, custom character data (HP etc.). */
		bool shared;
		bool dead;
};


void SelectSpritesheet(struct Game *game, struct Character *character, char* name);
void ChangeSpritesheet(struct Game *game, struct Character *character, char* name);
void RegisterSpritesheet(struct Game *game, struct Character *character, char* name);

void DrawCharacter(struct Game *game, struct Character *character, ALLEGRO_COLOR tilt, int flags);

struct Character* CreateCharacter(struct Game *game, char* name);
void DestroyCharacter(struct Game *game, struct Character *character);

void LoadSpritesheets(struct Game *game, struct Character *character);
void UnloadSpritesheets(struct Game *game, struct Character *character);

void AnimateCharacter(struct Game *game, struct Character *character, float speed_modifier);
void MoveCharacter(struct Game *game, struct Character *character, float x, float y, float angle);
void SetCharacterPosition(struct Game *game, struct Character *character, int x, int y, float angle);

#endif