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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 "mainmenumanager.h"
#include "debug.h"
#include "clouds.h"
#include "server.h"
#include "filesys.h"
#include "guiMainMenu.h"
#include "game.h"
#include "chat.h"
#include "gettext.h"
#include "profiler.h"
#include "log.h"
#include "serverlist.h"
#include "guiEngine.h"
#include "player.h"
#include "fontengine.h"
#include "clientlauncher.h"

/* mainmenumanager.h
 */
gui::IGUIEnvironment *guienv = NULL;
gui::IGUIStaticText *guiroot = NULL;
MainMenuManager g_menumgr;

bool noMenuActive()
{
	return g_menumgr.menuCount() == 0;
}

// Passed to menus to allow disconnecting and exiting
MainGameCallback *g_gamecallback = NULL;


// Instance of the time getter
static TimeGetter *g_timegetter = NULL;

u32 getTimeMs()
{
	if (g_timegetter == NULL)
		return 0;
	return g_timegetter->getTime(PRECISION_MILLI);
}

u32 getTime(TimePrecision prec) {
	if (g_timegetter == NULL)
		return 0;
	return g_timegetter->getTime(prec);
}

ClientLauncher::~ClientLauncher()
{
	if (receiver)
		delete receiver;

	if (input)
		delete input;

	if (g_fontengine)
		delete g_fontengine;

	if (device)
		device->drop();
}


bool ClientLauncher::run(GameParams &game_params, const Settings &cmd_args)
{
	init_args(game_params, cmd_args);

	// List video modes if requested
	if (list_video_modes)
		return print_video_modes();

	if (!init_engine()) {
		errorstream << "Could not initialize game engine." << std::endl;
		return false;
	}

	// Create time getter
	g_timegetter = new IrrlichtTimeGetter(device);

	// Speed tests (done after irrlicht is loaded to get timer)
	if (cmd_args.getFlag("speedtests")) {
		dstream << "Running speed tests" << std::endl;
		speed_tests();
		return true;
	}

	video::IVideoDriver *video_driver = device->getVideoDriver();
	if (video_driver == NULL) {
		errorstream << "Could not initialize video driver." << std::endl;
		return false;
	}

	porting::setXorgClassHint(video_driver->getExposedVideoData(), PROJECT_NAME_C);

	/*
		This changes the minimum allowed number of vertices in a VBO.
		Default is 500.
	*/
	//driver->setMinHardwareBufferVertexCount(50);

	// Create game callback for menus
	g_gamecallback = new MainGameCallback(device);

	device->setResizable(true);

	if (random_input)
		input = new RandomInputHandler();
	else
		input = new RealInputHandler(device, receiver);

	smgr = device->getSceneManager();
	smgr->getParameters()->setAttribute(scene::ALLOW_ZWRITE_ON_TRANSPARENT, true);

	guienv = device->getGUIEnvironment();
	skin = guienv->getSkin();
	skin->setColor(gui::EGDC_BUTTON_TEXT, video::SColor(255, 255, 255, 255));
	skin->setColor(gui::EGDC_3D_LIGHT, video::SColor(0, 0, 0, 0));
	skin->setColor(gui::EGDC_3D_HIGH_LIGHT, video::SColor(255, 30, 30, 30));
	skin->setColor(gui::EGDC_3D_SHADOW, video::SColor(255, 0, 0, 0));
	skin->setColor(gui::EGDC_HIGH_LIGHT, video::SColor(255, 70, 120, 50));
	skin->setColor(gui::EGDC_HIGH_LIGHT_TEXT, video::SColor(255, 255, 255, 255));

	g_fontengine = new FontEngine(g_settings, guienv);
	FATAL_ERROR_IF(g_fontengine == NULL, "Font engine creation failed.");

#if (IRRLICHT_VERSION_MAJOR >= 1 && IRRLICHT_VERSION_MINOR >= 8) || IRRLICHT_VERSION_MAJOR >= 2
	// Irrlicht 1.8 input colours
	skin->setColor(gui::EGDC_EDITABLE, video::SColor(255, 128, 128, 128));
	skin->setColor(gui::EGDC_FOCUSED_EDITABLE, video::SColor(255, 96, 134, 49));
#endif

	// Create the menu clouds
	if (!g_menucloudsmgr)
		g_menucloudsmgr = smgr->createNewSceneManager();
	if (!g_menuclouds)
		g_menuclouds = new Clouds(g_menucloudsmgr->getRootSceneNode(),
				g_menucloudsmgr, -1, rand(), 100);
	g_menuclouds->update(v2f(0, 0), video::SColor(255, 200, 200, 255));
	scene::ICameraSceneNode* camera;
	camera = g_menucloudsmgr->addCameraSceneNode(0,
				v3f(0, 0, 0), v3f(0, 60, 100));
	camera->setFarValue(10000);

	/*
		GUI stuff
	*/

	ChatBackend chat_backend;

	// If an error occurs, this is set to something by menu().
	// It is then displayed before the menu shows on the next call to menu()
	std::string error_message;
	bool reconnect_requested = false;

	bool first_loop = true;

	/*
		Menu-game loop
	*/
	bool retval = true;
	bool *kill = porting::signal_handler_killstatus();

	while (device->run() && !*kill && !g_gamecallback->shutdown_requested)
	{
		// Set the window caption
		const wchar_t *text = wgettext("Main Menu");
		device->setWindowCaption((utf8_to_wide(PROJECT_NAME_C) + L" [" + text + L"]").c_str());
		delete[] text;

		try {	// This is used for catching disconnects

			guienv->clear();

			/*
				We need some kind of a root node to be able to add
				custom gui elements directly on the screen.
				Otherwise they won't be automatically drawn.
			*/
			guiroot = guienv->addStaticText(L"", core::rect<s32>(0, 0, 10000, 10000));

			bool game_has_run = launch_game(error_message, reconnect_requested,
				game_params, cmd_args);

			// If skip_main_menu, we only want to startup once
			if (skip_main_menu && !first_loop)
				break;

			first_loop = false;

			if (!game_has_run) {
				if (skip_main_menu)
					break;
				else
					continue;
			}

			// Break out of menu-game loop to shut down cleanly
			if (!device->run() || *kill) {
				if (g_settings_path != "")
					g_settings->updateConfigFile(g_settings_path.c_str());
				break;
			}

			if (current_playername.length() > PLAYERNAME_SIZE-1) {
				error_message = gettext("Player name too long.");
				playername = current_playername.substr(0, PLAYERNAME_SIZE-1);
				g_settings->set("name", playername);
				continue;
			}

			device->getVideoDriver()->setTextureCreationFlag(
					video::ETCF_CREATE_MIP_MAPS, g_settings->getBool("mip_map"));