/* $Id$ */

/*

 * This file is part of OpenTTD.

 * OpenTTD 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, version 2.

 * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.

 */

/** @file game_sl.cpp Handles the saveload part of the GameScripts */

#include "../stdafx.h"

#include "../debug.h"

#include "saveload.h"

#include "../string_func.h"

#include "../game/game.hpp"

#include "../game/game_config.hpp"

#include "../network/network.h"

#include "../game/game_instance.hpp"

#include "../game/game_text.hpp"

static char _game_saveload_name[64];

static int  _game_saveload_version;

static char _game_saveload_settings[1024];

static bool _game_saveload_is_random;

static const SaveLoad _game_script[] = {

	    SLEG_STR(_game_saveload_name,        SLE_STRB),

	    SLEG_STR(_game_saveload_settings,    SLE_STRB),

	    SLEG_VAR(_game_saveload_version,   SLE_UINT32),

	    SLEG_VAR(_game_saveload_is_random,   SLE_BOOL),

	     SLE_END()

};

static void SaveReal_GSDT(int *index_ptr)

{

	GameConfig *config = GameConfig::GetConfig();

	if (config->HasScript()) {

		ttd_strlcpy(_game_saveload_name, config->GetName(), lengthof(_game_saveload_name));

		_game_saveload_version = config->GetVersion();

	} else {

		/* No GameScript is configured for this so store an empty string as name. */

		_game_saveload_name[0] = '\0';

		_game_saveload_version = -1;

	}

	_game_saveload_is_random = config->IsRandom();

	_game_saveload_settings[0] = '\0';

	config->SettingsToString(_game_saveload_settings, lengthof(_game_saveload_settings));

	SlObject(NULL, _game_script);

	Game::Save();

}

static void Load_GSDT()

{

	/* Free all current data */

	GameConfig::GetConfig(GameConfig::SSS_FORCE_GAME)->Change(NULL);

	if ((CompanyID)SlIterateArray() == (CompanyID)-1) return;

	_game_saveload_version = -1;

	SlObject(NULL, _game_script);

	if (_networking && !_network_server) {

		GameInstance::LoadEmpty();

		if ((CompanyID)SlIterateArray() != (CompanyID)-1) SlErrorCorrupt("Too many GameScript configs");

		return;

	}

	GameConfig *config = GameConfig::GetConfig(GameConfig::SSS_FORCE_GAME);

	if (StrEmpty(_game_saveload_name)) {

	} else {

		config->Change(_game_saveload_name, _game_saveload_version, false, _game_saveload_is_random);

		if (!config->HasScript()) {

			/* No version of the GameScript available that can load the data. Try to load the

				* latest version of the GameScript instead. */

			config->Change(_game_saveload_name, -1, false, _game_saveload_is_random);

			if (!config->HasScript()) {

				if (strcmp(_game_saveload_name, "%_dummy") != 0) {

					DEBUG(script, 0, "The savegame has an GameScript by the name '%s', version %d which is no longer available.", _game_saveload_name, _game_saveload_version);

					DEBUG(script, 0, "This game wil continue to run without GameScript.");

				} else {

					DEBUG(script, 0, "The savegame had no GameScript available at the time of saving.");

					DEBUG(script, 0, "This game wil continue to run without GameScript.");

				}

			} else {

				DEBUG(script, 0, "The savegame has an GameScript by the name '%s', version %d which is no longer available.", _game_saveload_name, _game_saveload_version);

				DEBUG(script, 0, "The latest version of that GameScript has been loaded instead, but it'll not get the savegame data as it's incompatible.");

			}

			/* Make sure the GameScript doesn't get the saveload data, as he was not the

				*  writer of the saveload data in the first place */

			_game_saveload_version = -1;

		}

	}

	config->StringToSettings(_game_saveload_settings);

	/* Start the GameScript directly if it was active in the savegame */

	Game::StartNew();

	Game::Load(_game_saveload_version);

	if ((CompanyID)SlIterateArray() != (CompanyID)-1) SlErrorCorrupt("Too many GameScript configs");

}

static void Save_GSDT()

{

	SlSetArrayIndex(0);

	SlAutolength((AutolengthProc *)SaveReal_GSDT, NULL);

}

extern GameStrings *_current_data;

static const char *_game_saveload_string;

static uint _game_saveload_strings;

static const SaveLoad _game_language_header[] = {

	SLEG_STR(_game_saveload_string, SLE_STR),

	SLEG_VAR(_game_saveload_strings, SLE_UINT32),

	 SLE_END()

};

static const SaveLoad _game_language_string[] = {

	SLEG_STR(_game_saveload_string, SLE_STR | SLF_ALLOW_CONTROL),

	 SLE_END()

};

static void SaveReal_GSTR(LanguageStrings *ls)

{

	_game_saveload_string  = ls->language;

	_game_saveload_strings = ls->lines.Length();

	SlObject(NULL, _game_language_header);

	for (uint i = 0; i < _game_saveload_strings; i++) {

		_game_saveload_string = ls->lines[i];

		SlObject(NULL, _game_language_string);

	}

}

static void Load_GSTR()

{

	delete _current_data;

	_current_data = new GameStrings();

	while (SlIterateArray() != -1) {

		_game_saveload_string = NULL;

		SlObject(NULL, _game_language_header);

		for (uint i = 0; i < _game_saveload_strings; i++) {

			SlObject(NULL, _game_language_string);

			*ls->lines.Append() = strdup(_game_saveload_string != NULL ? _game_saveload_string : "");

		}

		*_current_data->raw_strings.Append() = ls;

	}

	/* If there were no strings in the savegame, set GameStrings to NULL */

	if (_current_data->raw_strings.Length() == 0) {

		delete _current_data;

		_current_data = NULL;

		return;

	}

	_current_data->Compile();

	ReconsiderGameScriptLanguage();

}

static void Save_GSTR()

{

	if (_current_data == NULL) return;

	for (uint i = 0; i < _current_data->raw_strings.Length(); i++) {

		SlSetArrayIndex(i);

		SlAutolength((AutolengthProc *)SaveReal_GSTR, _current_data->raw_strings[i]);

	}

}

extern const ChunkHandler _game_chunk_handlers[] = {

	{ 'GSTR', Save_GSTR, Load_GSTR, NULL, NULL, CH_ARRAY },

	{ 'GSDT', Save_GSDT, Load_GSDT, NULL, NULL, CH_ARRAY | CH_LAST},

};