/* 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 "engines/savestate.h"
#include "common/file.h"

#include "drascula/drascula.h"

namespace Drascula {

struct DrasculaGameDescription {
	ADGameDescription desc;
};

uint32 DrasculaEngine::getFeatures() const {
	return _gameDescription->desc.flags;
}

Common::Language DrasculaEngine::getLanguage() const {
	return _gameDescription->desc.language;
}

void DrasculaEngine::loadArchives() {
	const ADGameFileDescription *ag;

	if (getFeatures() & GF_PACKED) {
		for (ag = _gameDescription->desc.filesDescriptions; ag->fileName; ag++) {
			if (!_archives.hasArchive(ag->fileName))
				_archives.registerArchive(ag->fileName, ag->fileType);
		}
	}

	_archives.enableFallback(true);
}

}

static const PlainGameDescriptor drasculaGames[] = {
	{"drascula", "Drascula: The Vampire Strikes Back"},
	{0, 0}
};

namespace Drascula {

static const DrasculaGameDescription gameDescriptions[] = {
	{
		// Drascula English version
		{
			"drascula",
			0,
			AD_ENTRY1s("14.ald", "09b2735953edcd43af115c65ae00b10e", 1595),
			Common::EN_ANY,
			Common::kPlatformPC,
			ADGF_NO_FLAGS,
			GUIO0()
		},
	},

	{
		// Drascula English version (original packed files)
		{
			"drascula",
			0,
			{
				{"packet.001", 0, "c6a8697396e213a18472542d5f547cb4", 32847563},
				// HACK: List packet.001 twice to ensure this detector entry
				// is ranked just as high as the others (which each have two
				// detection files).
				{"packet.001", 0, "c6a8697396e213a18472542d5f547cb4", 32847563},
				{NULL, 0, NULL, 0}
			},
			Common::EN_ANY,
			Common::kPlatformPC,
			GF_PACKED,
			GUIO0()
		},
	},

	{
		// Drascula German version (original packed files)
		{
			"drascula",
			0,
			{
				{"packet.001", 0, "c6a8697396e213a18472542d5f547cb4", 32847563},
				{"packet.003", 1, "e8f4dc6091037329bab4ddb1cba35807", 719728},
				{NULL, 0, NULL, 0}
			},
			Common::DE_DEU,
			Common::kPlatformPC,
			GF_PACKED,
			GUIO0()
		},
	},

	{
		// Drascula French version (original packed files)
		{
			"drascula",
			0,
			{
				{"packet.001", 0, "c6a8697396e213a18472542d5f547cb4", 32847563},
				{"packet.002", 1, "4401123400f22f212b89f15fb4b43013", 721122},
				{NULL, 0, NULL, 0}
			},
			Common::FR_FRA,
			Common::kPlatformPC,
			GF_PACKED,
			GUIO0()
		},
	},

	{
		// Drascula Spanish version (original packed version)
		{
			"drascula",
			0,
			AD_ENTRY1s("packet.001", "3c971aba65a037d29d0b479cad6f5943", 31702652),
			Common::ES_ESP,
			Common::kPlatformPC,
			GF_PACKED,
			GUIO0()
		},
	},

	{
		// Drascula Spanish version
		{
			"drascula",
			0,
			AD_ENTRY1s("14.ald", "0746ed1a5cc8d9728f790c29813f4b43", 23059),
			Common::ES_ESP,
			Common::kPlatformPC,
			ADGF_NO_FLAGS,
			GUIO0()
		},
	},

	{
		// Drascula German version
		{
			"drascula",
			0,
			AD_ENTRY1s("14.ald", "72e46089033d56bad1c179ac36e2a9d2", 610),
			Common::DE_DEU,
			Common::kPlatformPC,
			ADGF_NO_FLAGS,
			GUIO0()
		},
	},

	{
		// Drascula French version
		{
			"drascula",
			0,
			AD_ENTRY1s("14.ald", "eeeee96b82169003630e08992248296c", 608),
			Common::FR_FRA,
			Common::kPlatformPC,
			ADGF_NO_FLAGS,
			GUIO0()
		},
	},

	{
		// Drascula Italian version (original packed version)
		{
			"drascula",
			0,
			AD_ENTRY1s("packet.001", "0253e924af223f5fe52537023385159b", 32564209),
			Common::IT_ITA,
			Common::kPlatformPC,
			GF_PACKED,
			GUIO0()
		},
	},
	{
		// Drascula Italian version
		{
			"drascula",
			0,
			AD_ENTRY1s("14.ald", "02b49a18328d0bf2efe6ba658c9c7a1d", 2098),
			Common::IT_ITA,
			Common::kPlatformPC,
			ADGF_NO_FLAGS,
			GUIO0()
		},
	},

	{
		// Drascula Spanish version (ScummVM repacked files)
		{
			"drascula",
			0,
			{
				{"packet.001", 0, "c6a8697396e213a18472542d5f547cb4", 32847563},
				{"packet.004", 1, "a289d3cf80d50f25ec569b653248437e", 17205838},
				{NULL, 0, NULL, 0}
			},
			Common::ES_ESP,
			Common::kPlatformPC,
			GF_PACKED,
			GUIO0()
		},
	},

	{
		// Drascula Italian version (ScummVM repacked files)
		{
			"drascula",
			0,
			{
				{"packet.001", 0, "c6a8697396e213a18472542d5f547cb4", 32847563},
				{"packet.005", 1, "58caac54b891f5d7f335e710e45e5d29", 16209623},
				{NULL, 0, NULL, 0}
			},
			Common::IT_ITA,
			Common::kPlatformPC,
			GF_PACKED,
			GUIO0()
		},
	},

	{
		// Drascula French version (ScummVM repacked files)
		{
			"drascula",
			0,
			{
				{"packet.001", 0, "c6a8697396e213a18472542d5f547cb4", 32847563},
				{"packet.002", 1, "7b83cedb9bb326ed5143e5c459508d43", 722383},
				{NULL, 0, NULL, 0}
			},
			Common::FR_FRA,
			Common::kPlatformPC,
			GF_PACKED,
			GUIO0()
		},
	},

	{ AD_TABLE_END_MARKER }
};

} // End of namespace Drascula

class DrasculaMetaEngine : public AdvancedMetaEngine {
public:
	DrasculaMetaEngine() : AdvancedMetaEngine(Drascula::gameDescriptions, sizeof(Drascula::DrasculaGameDescription), drasculaGames) {
		_singleid = "drascula";
		_guioptions = GUIO2(GUIO_NOMIDI, GUIO_NOLAUNCHLOAD);
	}

	virtual bool hasFeature(MetaEngineFeature f) const {
		return (f == kSupportsListSaves);
	}

	virtual SaveStateList listSaves(const char *target) const {
		Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
		Common::String pattern = Common::String::format("%s??", target);

		// Get list of savefiles for target game
		Common::StringArray filenames = saveFileMan->listSavefiles(pattern);
		Common::Array<int> slots;
		for (Common::StringArray::const_iterator file = filenames.begin(); file != filenames.end(); ++file) {

			// Obtain the last 2 digits of the filename, since they correspond to the save slot
			int slotNum = atoi(file->c_str() + file->size() - 2);

			// Ensure save slot is within valid range
			if (slotNum >= 1 && slotNum <= 10) {
				slots.push_back(slotNum);
			}
		}

		// Sort save slot ids
		Common::sort<int>(slots.begin(), slots.end());

		// Load save index
		Common::String fileEpa = Common::String::format("%s.epa", target);
		Common::InSaveFile *epa = saveFileMan->openForLoading(fileEpa);

		// Get savegame names from index
		Common::String saveDesc;
		SaveStateList saveList;
		int line = 1;
		for (uint i = 0; i < slots.size(); i++) {
			// ignore lines corresponding to unused saveslots
			for (; line < slots[i]; line++)
				epa->readLine();

			// copy the name in the line corresponding to the save slot and truncate to 22 characters
			saveDesc = Common::String(epa->readLine().c_str(), 22);

			// handle cases where the save directory and save index are detectably out of sync
			if (saveDesc == "*")
				saveDesc = "No name specified.";

			// increment line number to keep it in sync with slot number
			line++;

			// Insert savegame name into list
			saveList.push_back(SaveStateDescriptor(slots[i], saveDesc));
		}
		delete epa;

		return saveList;
	}

	virtual const char *getName() const {
		return "Drascula";
	}

	virtual const char *getOriginalCopyright() const {
		return "Drascula Engine (C) 2000 Alcachofa Soft, (C) 1996 Digital Dreams Multimedia, (C) 1994 Emilio de Paz";
	}

	virtual bool createInstance(OSystem *syst, Engine **engine, const ADGameDescription *desc) const;
};

bool DrasculaMetaEngine::createInstance(OSystem *syst, Engine **engine, const ADGameDescription *desc) const {
	const Drascula::DrasculaGameDescription *gd = (const Drascula::DrasculaGameDescription *)desc;
	if (gd) {
		*engine = new Drascula::DrasculaEngine(syst, gd);
	}
	return gd != 0;
}

#if PLUGIN_ENABLED_DYNAMIC(DRASCULA)
	REGISTER_PLUGIN_DYNAMIC(DRASCULA, PLUGIN_TYPE_ENGINE, DrasculaMetaEngine);
#else
	REGISTER_PLUGIN_STATIC(DRASCULA, PLUGIN_TYPE_ENGINE, DrasculaMetaEngine);
#endif