/* 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/>.
 *
 */

#ifndef PETKA_PETKA_H
#define PETKA_PETKA_H

#include "common/random.h"
#include "common/stream.h"
#include "common/memstream.h"
#include "common/savefile.h"

#include "engines/engine.h"
#include "engines/savestate.h"

#include "gui/debugger.h"

#include "graphics/surface.h"

/*
 *  This is the namespace of the Petka engine.
 *
 *  Status of this engine: In Development
 *
 *  Games using this engine:
 *  - Red Comrades Demo
 *  - Red Comrades Save the Galaxy - Fully playable
 *  - Red Comrades 2: For the Great Justice - Fully playable
 */

struct ADGameDescription;

namespace Common {
class SeekableReadStream;
}

namespace Graphics {
class Font;
}

namespace Video {
class VideoDecoder;
}

namespace Petka {

class Console;
class BigDialogue;
class FileMgr;
class SoundMgr;
class QManager;
class QSystem;
class VideoSystem;

enum {
	kPetkaDebugGeneral = 1,
	kPetkaDebugResources,
	kPetkaDebugMessagingSystem,
	kPetkaDebugDialogs,
};

enum {
	GF_COMPRESSED = (1 << 0),
};

enum PETKAActions {
	kActionNone,
	kActionCursorLook,
	kActionCursorWalk,
	kActionCursorTake,
	kActionCursorUse,
	kActionCursorTalk,
	kActionCursorChapayev,
	kActionInventory,
	kActionMap,
	kActionOptions,
	kActionPrevInterface,
	kActionSave,
	kActionLoad,
	kActionSkip,
};

class PetkaEngine : public Engine {
public:
	PetkaEngine(OSystem *syst, const ADGameDescription *desc);
	~PetkaEngine() override;

	bool isDemo() const;
	bool isPetka2() const;

	void loadPart(byte part);
	void loadPartAtNextFrame(byte part);

	byte getPart();
	int getSaveSlot();

	void loadChapter(byte chapter);

	Common::Error run() override;

	bool hasFeature(EngineFeature f) const override;

	void applyGameSettings() override;

	Common::SeekableReadStream *openFile(const Common::String &name, bool addCurrentPath);
	Common::SeekableReadStream *openIniFile(const Common::String &name);

	void playVideo(Common::SeekableReadStream *stream);
	QSystem *getQSystem() const;
	BigDialogue *getBigDialogue() const;
	SoundMgr *soundMgr() const;
	QManager *resMgr() const;

	VideoSystem *videoSystem() const;

	Common::RandomSource &getRnd();
	const Common::String &getSpeechPath();

	Graphics::Font *getTextFont() const { return _textFont.get(); }
	Graphics::Font *getDescriptionFont() const { return _descriptionFont.get(); }

	void pushMouseMoveEvent();

	Common::Error loadGameState(int slot) override;
	bool canLoadGameStateCurrently(Common::U32String *msg = nullptr) override;

	Common::Error saveGameState(int slot, const Common::String &desc, bool isAutosave) override;
	bool canSaveGameStateCurrently(Common::U32String *msg = nullptr) override;

	int getAutosaveSlot() const override { return - 1;}

	const ADGameDescription *const _desc;
	Common::ScopedPtr<Common::MemoryReadStream> _thumbnail;

protected:
	void pauseEngineIntern(bool pause) override;

private:
	void loadStores();

private:
	Common::ScopedPtr<Console> _console;
	Common::ScopedPtr<FileMgr> _fileMgr;
	Common::ScopedPtr<QManager> _resMgr;
	Common::ScopedPtr<SoundMgr> _soundMgr;
	Common::ScopedPtr<QSystem> _qsystem;
	Common::ScopedPtr<VideoSystem> _vsys;
	Common::ScopedPtr<BigDialogue> _dialogMan;
	Common::ScopedPtr<Video::VideoDecoder> _videoDec;
	Common::ScopedPtr<Graphics::Font> _textFont;
	Common::ScopedPtr<Graphics::Font> _descriptionFont;

	Common::RandomSource _rnd;

	Common::String _currentPath;
	Common::String _speechPath;

	Common::String _chapterStoreName;

	uint8 _part;
	uint8 _nextPart;
	uint8 _chapter;
	bool _shouldChangePart;
	int _saveSlot;
};

class Console : public GUI::Debugger {
public:
	Console(PetkaEngine *vm) {}
	virtual ~Console() {}
};

extern PetkaEngine *g_vm;

WARN_UNUSED_RESULT bool readSaveHeader(Common::InSaveFile &in, SaveStateDescriptor &desc, bool skipThumbnail = true);
Common::String generateSaveName(int slot, const char *gameId);

} // End of namespace Petka

#endif