/* 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#include "base/plugins.h"

#include "engines/advancedDetector.h"
#include "common/config-manager.h"
#include "common/file.h"
#include "common/savefile.h"

#include "pegasus/pegasus.h"

namespace Pegasus {

struct PegasusGameDescription {
	ADGameDescription desc;
};

enum {
	GF_DVD = (1 << 1)
};

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

bool PegasusEngine::isDemo() const {
	return (_gameDescription->desc.flags & ADGF_DEMO) != 0;
}

bool PegasusEngine::isDVD() const {
	return (_gameDescription->desc.flags & GF_DVD) != 0;
}

bool PegasusEngine::isDVDDemo() const {
	return isDemo() && isDVD();
}

bool PegasusEngine::isOldDemo() const {
	return isDemo() && !isDVD();
}

bool PegasusEngine::isWindows() const {
	return _gameDescription->desc.platform == Common::kPlatformWindows;
}

} // End of namespace Pegasus

static const PlainGameDescriptor pegasusGames[] = {
	{"pegasus", "The Journeyman Project: Pegasus Prime"},
	{0, 0}
};


namespace Pegasus {

static const PegasusGameDescription gameDescriptions[] = {
	{
		{
			"pegasus",
			"",
			AD_ENTRY1s("JMP PP Resources", "d13a602d2498010d720a6534f097f88b", 2009943),
			Common::EN_ANY,
			Common::kPlatformMacintosh,
			ADGF_MACRESFORK,
			GUIO0()
		},
	},

	{
		{
			"pegasus",
			"Demo",
			AD_ENTRY1s("JMP PP Resources", "d13a602d2498010d720a6534f097f88b", 360129),
			Common::EN_ANY,
			Common::kPlatformMacintosh,
			ADGF_MACRESFORK | ADGF_DEMO,
			GUIO1(GUIO_NOLAUNCHLOAD)
		},
	},

	{
		{
			"pegasus",
			"DVD Demo",
			AD_ENTRY1s("JMP PP Resources", "d0fcda50dc75c7a81ae314e6a813f4d2", 93495),
			Common::EN_ANY,
			Common::kPlatformMacintosh,
			ADGF_MACRESFORK | ADGF_DEMO | GF_DVD,
			GUIO1(GUIO_NOLAUNCHLOAD)
		},
	},

		{
		{
			"pegasus",
			"DVD Demo",
			AD_ENTRY1s("JMP PP Resources", "d0fcda50dc75c7a81ae314e6a813f4d2", 93495),
			Common::EN_ANY,
			Common::kPlatformWindows,
			ADGF_MACRESFORK | ADGF_DEMO | GF_DVD,
			GUIO1(GUIO_NOLAUNCHLOAD)
		},
	},

	{ AD_TABLE_END_MARKER }
};

} // End of namespace Pegasus


class PegasusMetaEngine : public AdvancedMetaEngine {
public:
	PegasusMetaEngine() : AdvancedMetaEngine(Pegasus::gameDescriptions, sizeof(Pegasus::PegasusGameDescription), pegasusGames) {
		_singleId = "pegasus";
	}

	virtual const char *getName() const {
		return "The Journeyman Project: Pegasus Prime";
	}

	virtual const char *getOriginalCopyright() const {
		return "The Journeyman Project: Pegasus Prime (C) Presto Studios";
	}

	virtual bool hasFeature(MetaEngineFeature f) const;
	virtual bool createInstance(OSystem *syst, Engine **engine, const ADGameDescription *desc) const;
	virtual SaveStateList listSaves(const char *target) const;
	virtual int getMaximumSaveSlot() const { return 999; }
	virtual void removeSaveState(const char *target, int slot) const;
};

bool PegasusMetaEngine::hasFeature(MetaEngineFeature f) const {
	return
		(f == kSupportsListSaves)
		|| (f == kSupportsLoadingDuringStartup)
		|| (f == kSupportsDeleteSave);
}

SaveStateList PegasusMetaEngine::listSaves(const char *target) const {
	// The original had no pattern, so the user must rename theirs
	// Note that we ignore the target because saves are compatible between
	// all versions
	Common::StringArray fileNames = Pegasus::PegasusEngine::listSaveFiles();

	SaveStateList saveList;
	for (uint32 i = 0; i < fileNames.size(); i++) {
		// Isolate the description from the file name
		Common::String desc = fileNames[i].c_str() + 8;
		for (int j = 0; j < 4; j++)
			desc.deleteLastChar();

		saveList.push_back(SaveStateDescriptor(i, desc));
	}

	return saveList;
}

void PegasusMetaEngine::removeSaveState(const char *target, int slot) const {
	// See listSaves() for info on the pattern
	Common::StringArray fileNames = Pegasus::PegasusEngine::listSaveFiles();
	g_system->getSavefileManager()->removeSavefile(fileNames[slot].c_str());
}

bool PegasusMetaEngine::createInstance(OSystem *syst, Engine **engine, const ADGameDescription *desc) const {
	const Pegasus::PegasusGameDescription *gd = (const Pegasus::PegasusGameDescription *)desc;

	if (gd)
		*engine = new Pegasus::PegasusEngine(syst, gd);

	return (gd != 0);
}

#if PLUGIN_ENABLED_DYNAMIC(PEGASUS)
	REGISTER_PLUGIN_DYNAMIC(PEGASUS, PLUGIN_TYPE_ENGINE, PegasusMetaEngine);
#else
	REGISTER_PLUGIN_STATIC(PEGASUS, PLUGIN_TYPE_ENGINE, PegasusMetaEngine);
#endif
