/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#include "common/scummsys.h"
#include "common/config-manager.h"
#include "common/debug.h"
#include "common/debug-channels.h"
#include "common/error.h"
#include "common/file.h"
#include "common/fs.h"
#include "common/text-to-speech.h"
#include "engines/advancedDetector.h"
#include "engines/util.h"
#include "gui/message.h"

#include "cge/cge.h"
#include "cge/vga13h.h"
#include "cge/cge_main.h"
#include "cge/talk.h"
#include "cge/text.h"
#include "cge/walk.h"

namespace CGE {

const int CGEEngine::_maxSceneArr[5] = {1, 8, 16, 23, 24};

CGEEngine::CGEEngine(OSystem *syst, const ADGameDescription *gameDescription)
	: Engine(syst), _gameDescription(gameDescription), _randomSource("cge") {

	_bitmapPalette = nullptr;
	_pocLight = nullptr;
	_keyboard = nullptr;
	_mouse = nullptr;
	_sprite = nullptr;
	_miniScene = nullptr;
	_shadow = nullptr;
	_horzLine = nullptr;
	_infoLine = nullptr;
	_debugLine = nullptr;
	_sceneLight = nullptr;
	_commandHandler = nullptr;
	_commandHandlerTurbo = nullptr;
	_eventManager = nullptr;
	_fx = nullptr;
	_sound = nullptr;
	_resman = nullptr;
	for (int i = 0; i < 8; i++)
		_pocket[i] = nullptr;
	_hero = nullptr;
	_text = nullptr;
	_talk = nullptr;
	_midiPlayer = nullptr;
	_miniShp = nullptr;
	_miniShpList = nullptr;
	_sprTv = nullptr;
	_sprK1 = nullptr;
	_sprK2 = nullptr;
	_sprK3 = nullptr;
	_font = nullptr;
	_vga = nullptr;
	_sys = nullptr;

	_quitFlag = false;
	_showBoundariesFl = false;
	_music = true;
	_dark = false;
	_game = false;
	_endGame = false;
	for (int i = 0; i < 4; i++)
		_flag[i] = false;

	_startupMode = 1;
	_oldLev = 0;
	_pocPtr = 0;
	_startGameSlot = -1;
	_recentStep = -2;
	_lastFrame = 0;
	_lastTick = 0;
	_maxScene = 0;
	_now = 1;
	_lev = -1;
	_mode = 0;
	_gameCase2Cpt = 0;
	_offUseCount  = 0;
	_volume[0] = 0;
	_volume[1] = 0;
	for (int i = 0; i < kPocketNX; i++)
		_pocref[i] = -1;

	initSceneValues();
}

void CGEEngine::initSceneValues() {
	for (int i = 0; i < kSceneMax; i++) {
		_heroXY[i].x = 0;
		_heroXY[i].y = 0;
	}

	for (int i = 0; i < kSceneMax + 1; i++) {
		_barriers[i]._horz = 0xFF;
		_barriers[i]._vert = 0xFF;
	}
}

void CGEEngine::init() {
	debugC(1, kCGEDebugEngine, "CGEEngine::init()");

	// Initialize fields
	_hero = nullptr;
	_shadow = nullptr;
	_miniScene = nullptr;
	_miniShp = nullptr;
	_miniShpList = nullptr;
	_sprite = nullptr;

	_resman = new ResourceManager();

	// Create debugger console
	setDebugger(new CGEConsole(this));

	// Initialize engine objects
	_font = new Font(this, "CGE");
	_text = new Text(this, "CGE");
	_talk = nullptr;
	_vga = new Vga(this);
	_sys = new System(this);
	_pocLight = new PocLight(this);
	for (int i = 0; i < kPocketNX; i++)
		_pocket[i] = nullptr;
	_horzLine = new HorizLine(this);
	_infoLine = new InfoLine(this, kInfoW);
	_sceneLight = new SceneLight(this);
	_debugLine = new InfoLine(this, kScrWidth);
	_commandHandler = new CommandHandler(this, false);
	_commandHandlerTurbo = new CommandHandler(this, true);
	_midiPlayer = new MusicPlayer(this);
	_mouse = new Mouse(this);
	_keyboard = new Keyboard(this);
	_eventManager = new EventManager(this);
	_fx = new Fx(this, 16);   // must precede SOUND!!
	_sound = new Sound(this);

	_offUseCount = atoi(_text->getText(kOffUseCount));

	_startGameSlot = ConfMan.hasKey("save_slot") ? ConfMan.getInt("save_slot") : -1;

	Common::TextToSpeechManager *ttsMan = g_system->getTextToSpeechManager();
	if (ttsMan != nullptr)
		ttsMan->enable(ConfMan.getBool("tts_enabled"));
}

void CGEEngine::deinit() {
	// Delete engine objects
	delete _vga;
	delete _sys;
	delete _sprite;
	delete _miniScene;
	delete _shadow;
	delete _horzLine;
	delete _infoLine;
	delete _sceneLight;
	delete _debugLine;
	delete _text;
	delete _pocLight;
	delete _keyboard;
	delete _mouse;
	delete _eventManager;
	delete _sound;
	delete _fx;
	delete _midiPlayer;
	delete _font;
	delete _commandHandler;
	delete _commandHandlerTurbo;
	delete _hero;
	delete _resman;

	if (_miniShpList) {
		for (int i = 0; _miniShpList[i]; ++i)
			delete _miniShpList[i];
		delete[] _miniShpList;
	}
}

CGEEngine::~CGEEngine() {
	debugC(1, kCGEDebugEngine, "CGEEngine::~CGEEngine()");
}

Common::Error CGEEngine::run() {
	debugC(1, kCGEDebugEngine, "CGEEngine::run()");

	if (_gameDescription->flags & ADGF_DEMO) {
		warning("Demos of Soltys are not supported.\nPlease get a free version on ScummVM download page");
		return Common::kUnsupportedGameidError;
	}

	// Initialize graphics using following:
	initGraphics(kScrWidth, kScrHeight);

	// Setup necessary game objects
	init();
	// Run the game
	cge_main();

	// If game is finished, display ending message
	if (_flag[3]) {
		Common::String msg = Common::String(_text->getText(kSayTheEnd));
		if (!msg.empty()) {
			g_system->delayMillis(10);
			GUI::MessageDialog dialog(msg);
			dialog.runModal();
			Common::TextToSpeechManager *ttsMan = g_system->getTextToSpeechManager();
			if (ttsMan != nullptr && ConfMan.getBool("tts_enabled")) {
				ttsMan->say(msg);
			}
		}
	}

	// Remove game objects
	deinit();

	return Common::kNoError;
}

bool CGEEngine::hasFeature(EngineFeature f) const {
	return
		(f == kSupportsReturnToLauncher) ||
		(f == kSupportsLoadingDuringRuntime) ||
		(f == kSupportsSavingDuringRuntime);
}

bool CGEEngine::canLoadGameStateCurrently() {
	return (_startupMode == 0) && _mouse->_active;
}

bool CGEEngine::canSaveGameStateCurrently() {
	return (_startupMode == 0) && _mouse->_active &&
				_commandHandler->idle() && !_hero->_flags._hide;
}

} // End of namespace CGE