/* 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 "ags/shared/ac/character_info.h"
#include "ags/shared/ac/game_setup_struct_base.h"
#include "ags/shared/ac/game_setup_struct.h"
#include "ags/shared/ac/game_version.h"
#include "ags/shared/ac/words_dictionary.h"
#include "ags/shared/script/cc_script.h"
#include "ags/shared/util/stream.h"
#include "ags/shared/util/string_utils.h"

namespace AGS3 {

using namespace AGS::Shared;

GameSetupStructBase::GameSetupStructBase()
	: numviews(0)
	, numcharacters(0)
	, playercharacter(-1)
	, totalscore(0)
	, numinvitems(0)
	, numdialog(0)
	, numdlgmessage(0)
	, numfonts(0)
	, color_depth(0)
	, target_win(0)
	, dialog_bullet(0)
	, hotdot(0)
	, hotdotouter(0)
	, uniqueid(0)
	, numgui(0)
	, numcursors(0)
	, default_lipsync_frame(0)
	, invhotdotsprite(0)
	, dict(nullptr)
	, _resolutionType(kGameResolution_Undefined)
	, _dataUpscaleMult(1)
	, _screenUpscaleMult(1) {
	memset(options, 0, sizeof(options));
	memset(paluses, 0, sizeof(paluses));
	memset(defpal, 0, sizeof(defpal));
	memset(reserved, 0, sizeof(reserved));
}

GameSetupStructBase::~GameSetupStructBase() {
	Free();
}

void GameSetupStructBase::Free() {
	for (int i = 0; i < MAXGLOBALMES; ++i) {
		messages[i].Free();
	}
	dict.reset();
	chars.clear();

	numcharacters = 0;
}

void GameSetupStructBase::SetDefaultResolution(GameResolutionType type) {
	SetDefaultResolution(type, Size());
}

void GameSetupStructBase::SetDefaultResolution(Size size) {
	SetDefaultResolution(kGameResolution_Custom, size);
}

void GameSetupStructBase::SetDefaultResolution(GameResolutionType type, Size size) {
	// Calculate native res first then remember it
	SetNativeResolution(type, size);
	_defGameResolution = _gameResolution;
	// Setup data resolution according to legacy settings (if set)
	_dataResolution = _defGameResolution;
	if (IsLegacyHiRes() && options[OPT_NATIVECOORDINATES] == 0) {
		_dataResolution = _defGameResolution / HIRES_COORD_MULTIPLIER;
	}
	OnResolutionSet();
}

void GameSetupStructBase::SetNativeResolution(GameResolutionType type, Size game_res) {
	if (type == kGameResolution_Custom) {
		_resolutionType = kGameResolution_Custom;
		_gameResolution = game_res;
		_letterboxSize = _gameResolution;
	} else {
		_resolutionType = type;
		_gameResolution = ResolutionTypeToSize(_resolutionType, IsLegacyLetterbox());
		_letterboxSize = ResolutionTypeToSize(_resolutionType, false);
	}
}

void GameSetupStructBase::SetGameResolution(GameResolutionType type) {
	SetNativeResolution(type, Size());
	OnResolutionSet();
}

void GameSetupStructBase::SetGameResolution(Size game_res) {
	SetNativeResolution(kGameResolution_Custom, game_res);
	OnResolutionSet();
}

void GameSetupStructBase::OnResolutionSet() {
	// The final data-to-game multiplier is always set after actual game resolution (not default one)
	if (!_dataResolution.IsNull())
		_dataUpscaleMult = _gameResolution.Width / _dataResolution.Width;
	else
		_dataUpscaleMult = 1;
	if (!_defGameResolution.IsNull())
		_screenUpscaleMult = _gameResolution.Width / _defGameResolution.Width;
	else
		_screenUpscaleMult = 1;
	_relativeUIMult = IsLegacyHiRes() ? HIRES_COORD_MULTIPLIER : 1;
}

void GameSetupStructBase::ReadFromFile(Stream *in, GameDataVersion game_ver, SerializeInfo &info) {
	// NOTE: historically the struct was saved by dumping whole memory
	// into the file stream, which added padding from memory alignment;
	// here we mark the padding bytes, as they do not belong to actual data.
	gamename.ReadCount(in, LEGACY_GAME_NAME_LENGTH);
	in->ReadInt16(); // alignment padding to int32 (gamename: 50 -> 52 bytes)
	in->ReadArrayOfInt32(options, MAX_OPTIONS);
	if (game_ver < kGameVersion_340_4) { // TODO: this should probably be possible to deduce script API level
		// using game data version and other options like OPT_STRICTSCRIPTING
		options[OPT_BASESCRIPTAPI] = kScriptAPI_Undefined;
		options[OPT_SCRIPTCOMPATLEV] = kScriptAPI_Undefined;
	}
	in->Read(&paluses[0], sizeof(paluses));
	// colors are an array of chars
	in->Read(&defpal[0], sizeof(defpal));
	numviews = in->ReadInt32();
	numcharacters = in->ReadInt32();
	playercharacter = in->ReadInt32();
	totalscore = in->ReadInt32();
	numinvitems = in->ReadInt16();
	in->ReadInt16(); // alignment padding to int32
	numdialog = in->ReadInt32();
	numdlgmessage = in->ReadInt32();
	numfonts = in->ReadInt32();
	color_depth = in->ReadInt32();
	target_win = in->ReadInt32();
	dialog_bullet = in->ReadInt32();
	hotdot = static_cast<uint16_t>(in->ReadInt16());
	hotdotouter = static_cast<uint16_t>(in->ReadInt16());
	uniqueid = in->ReadInt32();
	numgui = in->ReadInt32();
	numcursors = in->ReadInt32();
	GameResolutionType resolution_type = (GameResolutionType)in->ReadInt32();
	Size game_size;
	if (resolution_type == kGameResolution_Custom && game_ver >= kGameVersion_330) {
		game_size.Width = in->ReadInt32();
		game_size.Height = in->ReadInt32();
	}
	SetDefaultResolution(resolution_type, game_size);

	default_lipsync_frame = in->ReadInt32();
	invhotdotsprite = in->ReadInt32();
	in->ReadArrayOfInt32(reserved, NUM_INTS_RESERVED);

	info.ExtensionOffset = static_cast<uint32_t>(in->ReadInt32());
	in->ReadArrayOfInt32(&info.HasMessages.front(), MAXGLOBALMES);

	info.HasWordsDict = in->ReadInt32() != 0;
	in->ReadInt32(); // globalscript (dummy 32-bit pointer value)
	in->ReadInt32(); // chars (dummy 32-bit pointer value)
	info.HasCCScript = in->ReadInt32() != 0;
}

void GameSetupStructBase::WriteToFile(Stream *out, const SerializeInfo &info) const {
	// NOTE: historically the struct was saved by dumping whole memory
	// into the file stream, which added padding from memory alignment;
	// here we mark the padding bytes, as they do not belong to actual data.
	gamename.WriteCount(out, LEGACY_GAME_NAME_LENGTH);
	out->WriteInt16(0); // alignment padding to int32
	out->WriteArrayOfInt32(options, MAX_OPTIONS);
	out->Write(&paluses[0], sizeof(paluses));
	// colors are an array of chars
	out->Write(&defpal[0], sizeof(defpal));
	out->WriteInt32(numviews);
	out->WriteInt32(numcharacters);
	out->WriteInt32(playercharacter);
	out->WriteInt32(totalscore);
	out->WriteInt16(numinvitems);
	out->WriteInt16(0); // alignment padding to int32
	out->WriteInt32(numdialog);
	out->WriteInt32(numdlgmessage);
	out->WriteInt32(numfonts);
	out->WriteInt32(color_depth);
	out->WriteInt32(target_win);
	out->WriteInt32(dialog_bullet);
	out->WriteInt16(static_cast<uint16_t>(hotdot));
	out->WriteInt16(static_cast<uint16_t>(hotdotouter));
	out->WriteInt32(uniqueid);
	out->WriteInt32(numgui);
	out->WriteInt32(numcursors);
	out->WriteInt32(_resolutionType);
	if (_resolutionType == kGameResolution_Custom) {
		out->WriteInt32(_defGameResolution.Width);
		out->WriteInt32(_defGameResolution.Height);
	}
	out->WriteInt32(default_lipsync_frame);
	out->WriteInt32(invhotdotsprite);
	out->WriteArrayOfInt32(reserved, 17);
	for (int i = 0; i < MAXGLOBALMES; ++i) {
		out->WriteInt32(!messages[i].IsEmpty() ? 1 : 0);
	}
	out->WriteInt32(dict ? 1 : 0);
	out->WriteInt32(0); // globalscript (dummy 32-bit pointer value)
	out->WriteInt32(0); // chars  (dummy 32-bit pointer value)
	out->WriteInt32(info.HasCCScript ? 1 : 0);
}

Size ResolutionTypeToSize(GameResolutionType resolution, bool letterbox) {
	switch (resolution) {
	case kGameResolution_Default:
	case kGameResolution_320x200:
		return letterbox ? Size(320, 240) : Size(320, 200);
	case kGameResolution_320x240:
		return Size(320, 240);
	case kGameResolution_640x400:
		return letterbox ? Size(640, 480) : Size(640, 400);
	case kGameResolution_640x480:
		return Size(640, 480);
	case kGameResolution_800x600:
		return Size(800, 600);
	case kGameResolution_1024x768:
		return Size(1024, 768);
	case kGameResolution_1280x720:
		return Size(1280, 720);
	default:
		return Size();
	}
}

const char *GetScriptAPIName(ScriptAPIVersion v) {
	switch (v) {
	case kScriptAPI_v321: return "v3.2.1";
	case kScriptAPI_v330: return "v3.3.0";
	case kScriptAPI_v334: return "v3.3.4";
	case kScriptAPI_v335: return "v3.3.5";
	case kScriptAPI_v340: return "v3.4.0";
	case kScriptAPI_v341: return "v3.4.1";
	case kScriptAPI_v350: return "v3.5.0-alpha";
	case kScriptAPI_v3507: return "v3.5.0-final";
	case kScriptAPI_v351: return "v3.5.1";
	case kScriptAPI_v360: return "v3.6.0-alpha";
	case kScriptAPI_v36026: return "v3.6.0-final";
	case kScriptAPI_v361: return "v3.6.1";
	default: return "unknown";
	}
}

} // namespace AGS3