/*
Copyright (C) 2015-2016 Parallel Realities

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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#include "init.h"

static void loadConfig(void);
static void loadConfigFile(char *filename);
void saveConfig(void);
static void initColor(SDL_Color *c, int r, int g, int b);
static void showLoadingStep(float step, float maxSteps);

void init18N(int argc, char *argv[])
{
	int i;
	int languageId = -1;

	setlocale(LC_NUMERIC, "");

	for (i = 1 ; i < argc ; i++)
	{
		if (strcmp(argv[i], "-language") == 0)
		{
			languageId = i + 1;

			if (languageId >= argc)
			{
				SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_ERROR, "You must specify a language to use with -language. Using default.");
			}
		}
	}

	setLanguage("tbftss", languageId == -1 ? NULL : argv[languageId]);

	SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, "Numeric is %s", setlocale(LC_NUMERIC, "C"));
	SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, "atof(2.75) is %f", atof("2.75"));
}

void initSDL(void)
{
	int rendererFlags, windowFlags;

	/* do this here, so we don't destroy the save dir stored in app */
	memset(&app, 0, sizeof(App));

	/* done in src/plat/ */
	createSaveFolder();

	rendererFlags = SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC;
	windowFlags = 0;

	loadConfig();

	if (app.fullscreen)
	{
		windowFlags |= SDL_WINDOW_FULLSCREEN;
	}

	if (SDL_Init(SDL_INIT_VIDEO|SDL_INIT_AUDIO) < 0)
	{
		printf("Couldn't initialize SDL: %s\n", SDL_GetError());
		exit(1);
	}

	SDL_ShowCursor(0);

	if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 1024) == -1)
    {
        printf("Couldn't initialize SDL Mixer\n");
		exit(1);
    }

    Mix_AllocateChannels(64);

	Mix_Volume(-1, app.soundVolume * MIX_MAX_VOLUME / 10);
	Mix_VolumeMusic(app.musicVolume * MIX_MAX_VOLUME / 10);

	app.window = SDL_CreateWindow("TBFTSS - The Pandoran War", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, app.winWidth, app.winHeight, windowFlags);

	SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");

	app.renderer = SDL_CreateRenderer(app.window, -1, rendererFlags);

	IMG_Init(IMG_INIT_PNG | IMG_INIT_JPG);

	if (TTF_Init() < 0)
	{
		printf("Couldn't initialize SDL TTF: %s\n", SDL_GetError());
		exit(1);
	}

	app.backBuffer = SDL_CreateTexture(app.renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, SCREEN_WIDTH, SCREEN_HEIGHT);

	app.scaleX = SCREEN_WIDTH;
	app.scaleX /= app.winWidth;
	app.scaleY = SCREEN_HEIGHT;
	app.scaleY /= app.winHeight;

	SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, "Game scale factor: %.2f,%.2f\n", app.scaleX, app.scaleY);
}

void initGameSystem(void)
{
	int i, numInitFuns;
	void (*initFuncs[]) (void) = {
		initFonts,
		initInput,
		initResources,
		initSounds,
		initWidgets,
		initGame,
		loadFighterDefs,
		loadCapitalShipDefs,
		loadItemDefs,
		initBulletDefs,
		initStarSystems,
		initChallenges,
		initStats,
		initModalDialog,
		initBackground,
		initStars,
		initControls,
		initTrophies
	};

	numInitFuns = sizeof(initFuncs) / sizeof(void*);

	initColor(&colors.red, 255, 0, 0);
	initColor(&colors.orange, 255, 128, 0);
	initColor(&colors.yellow, 255, 255, 0);
	initColor(&colors.green, 0, 255, 0);
	initColor(&colors.blue, 0, 0, 255);
	initColor(&colors.cyan, 0, 255, 255);
	initColor(&colors.purple, 255, 0, 255);
	initColor(&colors.white, 255, 255, 255);
	initColor(&colors.black, 0, 0, 0);
	initColor(&colors.lightGrey, 192, 192, 192);
	initColor(&colors.darkGrey, 128, 128, 128);

	for (i = 0 ; i < numInitFuns ; i++)
	{
		showLoadingStep(i + 1, numInitFuns);

		initFuncs[i]();
	}
}

/*
 * Just in case the initial loading takes a while on the target machine. The rest of the loading a pretty quick by comparison.
 */
static void showLoadingStep(float step, float maxSteps)
{
	SDL_Rect r;

	prepareScene();

	r.w = SCREEN_WIDTH - 400;
	r.h = 14;
	r.x = (SCREEN_WIDTH / 2) - r.w / 2;
	r.y = (SCREEN_HEIGHT / 2) - r.h / 2;

	SDL_SetRenderDrawColor(app.renderer, 128, 128, 128, 255);
	SDL_RenderDrawRect(app.renderer, &r);

	r.w *= (step / maxSteps);
	r.x += 2;
	r.y += 2;
	r.w -= 4;
	r.h -= 4;

	SDL_SetRenderDrawColor(app.renderer, 128, 196, 255, 255);
	SDL_RenderFillRect(app.renderer, &r);

	presentScene();

	SDL_Delay(1);
}


static void initColor(SDL_Color *c, int r, int g, int b)
{
	memset(c, 0, sizeof(SDL_Color));
	c->r = r;
	c->g = g;
	c->b = b;
	c->a = 255;
}

static void loadConfig(void)
{
	char *configFilename;
	
	/* load default config first */
	loadConfigFile("data/app/"CONFIG_FILENAME);
	
	/* load saved config */
	configFilename = getSaveFilePath(CONFIG_FILENAME);

	if (fileExists(configFilename))
	{
		loadConfigFile(configFilename);
	}
	
	/* so that the player doesn't get confused if this is a new game */
	saveConfig();
}

static void loadConfigFile(char *filename)
{
	int i;
	cJSON *root, *controlsJSON, *node, *gameplayJSON;
	char *text;

	text = readFile(filename);

	root = cJSON_Parse(text);

	app.winWidth = cJSON_GetObjectItem(root, "winWidth")->valueint;
	app.winHeight = cJSON_GetObjectItem(root, "winHeight")->valueint;
	app.fullscreen = cJSON_GetObjectItem(root, "fullscreen")->valueint;
	app.musicVolume = cJSON_GetObjectItem(root, "musicVolume")->valueint;
	app.soundVolume = cJSON_GetObjectItem(root, "soundVolume")->valueint;

	controlsJSON = cJSON_GetObjectItem(root, "controls");
	if (controlsJSON)
	{
		node = cJSON_GetObjectItem(controlsJSON, "keys")->child;
		while (node)
		{
			i = lookup(node->string);

			app.keyControls[i] = node->valueint;

			node = node->next;
		}

		node = cJSON_GetObjectItem(controlsJSON, "mouse")->child;
		while (node)
		{
			i = lookup(node->string);

			app.mouseControls[i] = node->valueint;

			node = node->next;
		}
	}
	
	gameplayJSON = cJSON_GetObjectItem(root, "gameplay");
	if (gameplayJSON)
	{
		app.gameplay.friendlyFire = cJSON_GetObjectItem(gameplayJSON, "friendlyFire")->valueint;
		app.gameplay.autoSwitchPlayerTarget = cJSON_GetObjectItem(gameplayJSON, "autoSwitchPlayerTarget")->valueint;
		app.gameplay.missileReTarget = cJSON_GetObjectItem(gameplayJSON, "missileReTarget")->valueint;
		app.gameplay.healthBars = cJSON_GetObjectItem(gameplayJSON, "healthBars")->valueint;
	}

	cJSON_Delete(root);
	free(text);
}

void saveConfig(void)
{
	int i;
	char *out, *configFilename;
	cJSON *root, *controlsJSON, *keysJSON, *mouseJSON, *gameplayJSON;

	configFilename = getSaveFilePath(CONFIG_FILENAME);

	SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, "Saving config ...");

	root = cJSON_CreateObject();
	cJSON_AddNumberToObject(root, "winWidth", app.winWidth);
	cJSON_AddNumberToObject(root, "winHeight", app.winHeight);
	cJSON_AddNumberToObject(root, "fullscreen", app.fullscreen);
	cJSON_AddNumberToObject(root, "musicVolume", app.musicVolume);
	cJSON_AddNumberToObject(root, "soundVolume", app.soundVolume);

	keysJSON = cJSON_CreateObject();
	for (i = 0 ; i < CONTROL_MAX ; i++)
	{
		cJSON_AddNumberToObject(keysJSON, getLookupName("CONTROL_", i), app.keyControls[i]);
	}

	mouseJSON = cJSON_CreateObject();
	for (i = 0 ; i < CONTROL_MAX ; i++)
	{
		cJSON_AddNumberToObject(mouseJSON, getLookupName("CONTROL_", i), app.mouseControls[i]);
	}

	controlsJSON = cJSON_CreateObject();
	cJSON_AddItemToObject(controlsJSON, "keys", keysJSON);
	cJSON_AddItemToObject(controlsJSON, "mouse", mouseJSON);
	cJSON_AddItemToObject(root, "controls", controlsJSON);
	
	gameplayJSON = cJSON_CreateObject();
	cJSON_AddNumberToObject(gameplayJSON, "friendlyFire", app.gameplay.friendlyFire);
	cJSON_AddNumberToObject(gameplayJSON, "autoSwitchPlayerTarget", app.gameplay.autoSwitchPlayerTarget);
	cJSON_AddNumberToObject(gameplayJSON, "missileReTarget", app.gameplay.missileReTarget);
	cJSON_AddNumberToObject(gameplayJSON, "healthBars", app.gameplay.healthBars);
	cJSON_AddItemToObject(root, "gameplay", gameplayJSON);

	out = cJSON_Print(root);

	if (!writeFile(configFilename, out))
	{
		SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_ERROR, "Failed to save config");
	}

	cJSON_Delete(root);
	free(out);
}

void cleanup(void)
{
	SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, "Cleaning up ...");

	SDL_DestroyRenderer(app.renderer);
	SDL_DestroyWindow(app.window);

	destroyLookups();

	destroyTextures();

	expireTexts(1);

	destroyFonts();

	destroySounds();

	destroyGame();

	destroyFighterDefs();

	destroyCapitalShipDefs();

	destroyBulletDefs();

	destroyItemDefs();

	destroyStarSystems();

	destroyBattle();

	destroyGalacticMap();

	destroyWidgets();

	destroyResources();
	
	destroyCredits();
	
	SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, "Done");

	TTF_Quit();

	SDL_Quit();
}