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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "irrlichttypes.h" // must be included before anything irrlicht, see comment in the file
#include "irrlicht.h" // createDevice
#include "irrlichttypes_extrabloated.h"
#include "chat_interface.h"
#include "debug.h"
#include "unittest/test.h"
#include "server.h"
#include "filesys.h"
#include "version.h"
#include "client/game.h"
#include "defaultsettings.h"
#include "gettext.h"
#include "log.h"
#include "util/quicktune.h"
#include "httpfetch.h"
#include "gameparams.h"
#include "database/database.h"
#include "config.h"
#include "player.h"
#include "porting.h"
#include "network/socket.h"
#if USE_CURSES
	#include "terminal_chat_console.h"
#endif
#ifndef SERVER
#include "gui/guiMainMenu.h"
#include "client/clientlauncher.h"
#include "gui/guiEngine.h"
#include "gui/mainmenumanager.h"
#endif

#ifdef HAVE_TOUCHSCREENGUI
	#include "gui/touchscreengui.h"
#endif

#if !defined(SERVER) && \
	(IRRLICHT_VERSION_MAJOR == 1) && \
	(IRRLICHT_VERSION_MINOR == 8) && \
	(IRRLICHT_VERSION_REVISION == 2)
	#error "Irrlicht 1.8.2 is known to be broken - please update Irrlicht to version >= 1.8.3"
#endif

#define DEBUGFILE "debug.txt"
#define DEFAULT_SERVER_PORT 30000

typedef std::map<std::string, ValueSpec> OptionList;

/**********************************************************************
 * Private functions
 **********************************************************************/

static bool get_cmdline_opts(int argc, char *argv[], Settings *cmd_args);
static void set_allowed_options(OptionList *allowed_options);

static void print_help(const OptionList &allowed_options);
static void print_allowed_options(const OptionList &allowed_options);
static void print_version();
static void print_worldspecs(const std::vector<WorldSpec> &worldspecs,
	std::ostream &os, bool print_name = true, bool print_path = true);
static void print_modified_quicktune_values();

static void list_game_ids();
static void list_worlds(bool print_name, bool print_path);
static bool setup_log_params(const Settings &cmd_args);
static bool create_userdata_path();
static bool init_common(const Settings &cmd_args, int argc, char *argv[]);
static void startup_message();
static bool read_config_file(const Settings &cmd_args);
static void init_log_streams(const Settings &cmd_args);

static bool game_configure(GameParams *game_params, const Settings &cmd_args);
static void game_configure_port(GameParams *game_params, const Settings &cmd_args);

static bool game_configure_world(GameParams *game_params, const Settings &cmd_args);
static bool get_world_from_cmdline(GameParams *game_params, const Settings &cmd_args);
static bool get_world_from_config(GameParams *game_params, const Settings &cmd_args);
static bool auto_select_world(GameParams *game_params);
static std::string get_clean_world_path(const std::string &path);

static bool game_configure_subgame(GameParams *game_params, const Settings &cmd_args);
static bool get_game_from_cmdline(GameParams *game_params, const Settings &cmd_args);
static bool determine_subgame(GameParams *game_params);

static bool run_dedicated_server(const GameParams &game_params, const Settings &cmd_args);
static bool migrate_map_database(const GameParams &game_params, const Settings &cmd_args);

/**********************************************************************/


FileLogOutput file_log_output;

static OptionList allowed_options;

int main(int argc, char *argv[])
{
	int retval;
	debug_set_exception_handler();

	g_logger.registerThread("Main");
	g_logger.addOutputMaxLevel(&stderr_output, LL_ACTION);

	Settings cmd_args;
	bool cmd_args_ok = get_cmdline_opts(argc, argv, &cmd_args);
	if (!cmd_args_ok
			|| cmd_args.getFlag("help")
			|| cmd_args.exists("nonopt1")) {
		porting::attachOrCreateConsole();
		print_help(allowed_options);
		return cmd_args_ok ? 0 : 1;
	}
	if (cmd_args.getFlag("console"))
		porting::attachOrCreateConsole();

	if (cmd_args.getFlag("version")) {
		porting::attachOrCreateConsole();
		print_version();
		return 0;
	}

	if (!setup_log_params(cmd_args))
		return 1;

	porting::signal_handler_init();

#ifdef __ANDROID__
	porting::initAndroid();
	porting::initializePathsAndroid();
#else
	porting::initializePaths();
#endif

	if (!create_userdata_path()) {
		errorstream << "Cannot create user data directory" << std::endl;
		return 1;
	}

	// Debug handler
	BEGIN_DEBUG_EXCEPTION_HANDLER

	// List gameids if requested
	if (cmd_args.exists("gameid") && cmd_args.get("gameid") == "list") {
		list_game_ids();
		return 0;
	}

	// List worlds, world names, and world paths if requested
	if (cmd_args.exists("worldlist")) {
		if (cmd_args.get("worldlist") == "name") {
			list_worlds(true, false);
		} else if (cmd_args.get("worldlist") == "path") {
			list_worlds(false, true);
		} else if (cmd_args.get("worldlist") == "both") {
			list_worlds(true, true);
		} else {
			errorstream << "Invalid --worldlist value: "
				<< cmd_args.get("worldlist") << std::endl;
			return 1;
		}
		return 0;
	}

	if (!init_common(cmd_args, argc, argv))
		return 1;

	if (g_settings->getBool("enable_console"))
		porting::attachOrCreateConsole();

#ifndef __ANDROID__
	// Run unit tests
	if (cmd_args.getFlag("run-unittests")) {
#if BUILD_UNITTESTS
		return run_tests();
#else
		errorstream << "Unittest support is not enabled in this binary. "
			<< "If you want to enable it, compile project with BUILD_UNITTESTS=1 flag."
			<< std::endl;
#endif
	}
#endif

	GameStartData game_params;
#ifdef SERVER
	porting::attachOrCreateConsole();
	game_params.is_dedicated_server = true;
#else
	const bool isServer = cmd_args.getFlag("server");
	if (isServer)
		porting::attachOrCreateConsole();
	game_params.is_dedicated_server = isServer;
#endif

	if (!game_configure(&game_params, cmd_args))
		return 1;

	sanity_check(!game_params.world_path.empty());

	if (game_params.is_dedicated_server)
		return run_dedicated_server(game_params, cmd_args) ? 0 : 1;

#ifndef SERVER
	ClientLauncher launcher;
	retval = launcher.run(game_params, cmd_args) ? 0 : 1;
#else
	retval = 0;
#endif

	// Update configuration file
	if (!g_settings_path.empty())
		g_settings->updateConfigFile(g_settings_path.c_str());

	print_modified_quicktune_values();

	// Stop httpfetch thread (if started)
	httpfetch_cleanup();

	END_DEBUG_EXCEPTION_HANDLER

	return retval;
}


/*****************************************************************************
 * Startup / Init
 *****************************************************************************/