/* 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.
 *
 * $URL$
 * $Id$
 *
 */

#include "common/system.h"

#include "common/config-manager.h"

#include "parallaction/parallaction.h"
#include "parallaction/sound.h"


namespace Parallaction {

#define MOUSEARROW_WIDTH		16
#define MOUSEARROW_HEIGHT		16

#define MOUSECOMBO_WIDTH		32	// sizes for cursor + selected inventory item
#define MOUSECOMBO_HEIGHT		32

LocationName::LocationName() {
	_buf = 0;
	_hasSlide = false;
	_hasCharacter = false;
}

LocationName::~LocationName() {
	free(_buf);
}


/*
	bind accept the following input formats:

    1 - [S].slide.[L]{.[C]}
	2 - [L]{.[C]}

    where:

	[S] is the slide to be shown
    [L] is the location to switch to (immediately in case 2, or right after slide [S] in case 1)
    [C] is the character to be selected, and is optional

    The routine tells one form from the other by searching for the '.slide.'

    NOTE: there exists one script in which [L] is not used in the case 1, but its use
		  is commented out, and would definitely crash the current implementation.
*/
void LocationName::bind(const char *s) {

	free(_buf);

	_buf = strdup(s);
	_hasSlide = false;
	_hasCharacter = false;

	Common::StringList list;
	char *tok = strtok(_buf, ".");
	while (tok) {
		list.push_back(tok);
		tok = strtok(NULL, ".");
	}

	if (list.size() < 1 || list.size() > 4)
		error("changeLocation: ill-formed location name '%s'", s);

	if (list.size() > 1) {
		if (list[1] == "slide") {
			_hasSlide = true;
			_slide = list[0];

			list.remove_at(0);		// removes slide name
			list.remove_at(0);		// removes 'slide'
		}

		if (list.size() == 2) {
			_hasCharacter = true;
			_character = list[1];
		}
	}

	_location = list[0];

	strcpy(_buf, s);		// kept as reference
}



int Parallaction_ns::init() {

	_screenWidth = 320;
	_screenHeight = 200;

	if (getPlatform() == Common::kPlatformPC) {
		_disk = new DosDisk_ns(this);
	} else {
		if (getFeatures() & GF_DEMO) {
			strcpy(_location._name, "fognedemo");
		}
		_disk = new AmigaDisk_ns(this);
		_disk->selectArchive((getFeatures() & GF_DEMO) ? "disk0" : "disk1");
	}

	if (getPlatform() == Common::kPlatformPC) {
		int midiDriver = MidiDriver::detectMusicDriver(MDT_MIDI | MDT_ADLIB | MDT_PREFER_MIDI);
		MidiDriver *driver = MidiDriver::createMidi(midiDriver);
		_soundMan = new DosSoundMan(this, driver);
		_soundMan->setMusicVolume(ConfMan.getInt("music_volume"));
	} else {
		_soundMan = new AmigaSoundMan(this);
	}

	initJobs();
	initResources();
	initFonts();
	initCursors();
	initOpcodes();
	initParsers();

	Parallaction::init();

	return 0;
}

Parallaction_ns::~Parallaction_ns() {
	freeFonts();

	delete _mouseComposedArrow;

	delete _commandsNames;
	delete _instructionNames;
	delete _locationStmt;

}


void Parallaction_ns::freeFonts() {

	delete _dialogueFont;
	delete _labelFont;
	delete _menuFont;

}

void Parallaction_ns::renderLabel(Graphics::Surface *cnv, char *text) {

	if (getPlatform() == Common::kPlatformAmiga) {
		cnv->create(_labelFont->getStringWidth(text) + 16, 10, 1);

		_labelFont->setColor(7);
		_labelFont->drawString((byte*)cnv->pixels + 1, cnv->w, text);
		_labelFont->drawString((byte*)cnv->pixels + 1 + cnv->w * 2, cnv->w, text);
		_labelFont->drawString((byte*)cnv->pixels + cnv->w, cnv->w, text);
		_labelFont->drawString((byte*)cnv->pixels + 2 + cnv->w, cnv->w, text);
		_labelFont->setColor(1);
		_labelFont->drawString((byte*)cnv->pixels + 1 + cnv->w, cnv->w, text);
	} else {
		cnv->create(_labelFont->getStringWidth(text), _labelFont->height(), 1);
		_labelFont->drawString((byte*)cnv->pixels, cnv->w, text);
	}

}

void Parallaction_ns::initCursors() {

	_mouseComposedArrow = _disk->loadPointer("pointer");

	byte temp[MOUSEARROW_WIDTH*MOUSEARROW_HEIGHT];
	memcpy(temp, _mouseArrow, MOUSEARROW_WIDTH*MOUSEARROW_HEIGHT);

	uint16 k = 0;
	for (uint16 i = 0; i < 4; i++) {
		for (uint16 j = 0; j < 64; j++) _mouseArrow[k++] = temp[i + j * 4];
	}

	return;
}

void Parallaction_ns::setArrowCursor() {

	debugC(1, kDebugInput, "setting mouse cursor to arrow");

	// this stuff is needed to avoid artifacts with labels and selected items when switching cursors
	_gfx->setLabel(0);
	_activeItem._id = 0;

	_system->setMouseCursor(_mouseArrow, MOUSEARROW_WIDTH, MOUSEARROW_HEIGHT, 0, 0, 0);
	_system->showMouse(true);

}

void Parallaction_ns::setInventoryCursor(int pos) {

	if (pos == -1)
		return;

	const InventoryItem *item = getInventoryItem(pos);
	if (item->_index == 0)
		return;

	_activeItem._id = item->_id;

	byte *v8 = _mouseComposedArrow->getData(0);

	// FIXME: destination offseting is not clear
	byte* s = _char._objs->getData(item->_index);
	byte* d = v8 + 7 + MOUSECOMBO_WIDTH * 7;

	for (uint i = 0; i < INVENTORYITEM_HEIGHT; i++) {
		memcpy(d, s, INVENTORYITEM_WIDTH);

		s += INVENTORYITEM_PITCH;
		d += MOUSECOMBO_WIDTH;
	}

	_system->setMouseCursor(v8, MOUSECOMBO_WIDTH, MOUSECOMBO_HEIGHT, 0, 0, 0);

}


void Parallaction_ns::callFunction(uint index, void* parm) {
	assert(index < 25);	// magic value 25 is maximum # of callables for Nippon Safes

	(this->*_callables[index])(parm);
}


int Parallaction_ns::go() {

	_globalTable = _disk->loadTable("global");

	guiStart();

	changeLocation(_location._name);

	runGame();

	return 0;
}

void Parallaction_ns::switchBackground(const char* background, const char* mask) {
//	printf("switchBackground(%s)", name);

	Palette pal;

	uint16 v2 = 0;
	if (!scumm_stricmp(background, "final")) {
		_gfx->clearScreen(Gfx::kBitBack);
		for (uint16 _si = 0; _si < 32; _si++) {
			pal.setEntry(_si, v2, v2, v2);
			v2 += 4;
		}

		g_system->delayMillis(20);
		_gfx->setPalette(pal);
		_gfx->updateScreen();
	}

	setBackground(background, mask, mask);

	return;
}


void Parallaction_ns::showSlide(const char *name) {

	BackgroundInfo info;

	_disk->loadSlide(info, name);

	// TODO: avoid using screen buffers for displaying slides. Using a generic buffer
	// allows for positioning of graphics as needed by Big Red Adventure.
	// The main problem lies with menu, which relies on multiple buffers, mainly because
	// it is crappy code.
	_gfx->setBackground(&info.bg);
	_gfx->setPalette(info.palette);
	_gfx->copyScreen(Gfx::kBitBack, Gfx::kBitFront);

	info.bg.free();
	info.mask.free();
	info.path.free();

	return;
}

//	changeLocation handles transitions between locations, and is able to display slides
//	between one and the other.
//
void Parallaction_ns::changeLocation(char *location) {
	debugC(1, kDebugExec, "changeLocation(%s)", location);

	_soundMan->playLocationMusic(location);

	// WORKAROUND: this hideLabel has been added to avoid crashes caused by
	// execution of label jobs after a location switch. The other workaround in
	// Parallaction::runGame should have been rendered useless by this one.
	_gfx->setLabel(0);

	_hoverZone = NULL;
	if (_engineFlags & kEngineBlockInput) {
		setArrowCursor();
	}

	_animations.remove(&_char._ani);

	// WORKAROUND: eat up any pending short-lived job that may be referring to the
	// current location before the actual switch is performed, or engine may
	// segfault because of invalid pointers.
	runJobs();
	runJobs();

	freeLocation();

	LocationName locname;
	locname.bind(location);

	if (locname.hasSlide()) {
		showSlide(locname.slide());
		_gfx->setFont(_menuFont);
		_gfx->displayCenteredString(14, _slideText[0]); // displays text on screen
		_gfx->updateScreen();
		waitUntilLeftClick();
	}

	if (locname.hasCharacter()) {
		changeCharacter(locname.character());
	}

	_animations.push_front(&_char._ani);

	strcpy(_saveData1, locname.location());
	parseLocation(_saveData1);

	_char._ani._oldPos.x = -1000;
	_char._ani._oldPos.y = -1000;

	_char._ani.field_50 = 0;
	if (_location._startPosition.x != -1000) {
		_char._ani._left = _location._startPosition.x;
		_char._ani._top = _location._startPosition.y;
		_char._ani._frame = _location._startFrame;
		_location._startPosition.y = -1000;
		_location._startPosition.x = -1000;
	}


	_gfx->copyScreen(Gfx::kBitBack, Gfx::kBitFront);
	_gfx->copyScreen(Gfx::kBitBack, Gfx::kBit2);
	_gfx->setBlackPalette();
	_gfx->updateScreen();

	runCommands(_location._commands);

	doLocationEnterTransition();

	runCommands(_location._aCommands);

	if (_hasLocationSound)
		_soundMan->playSfx(_locationSound, 0, true);

	debugC(1, kDebugExec, "changeLocation() done");

	_engineFlags &= ~kEngineChangeLocation;

	return;

}


void Parallaction_ns::changeCharacter(const char *name) {
	debugC(1, kDebugExec, "changeCharacter(%s)", name);

	_char.setName(name);

	if (!scumm_stricmp(_char.getFullName(), _characterName1)) {
		debugC(3, kDebugExec, "changeCharacter: nothing done");
		return;
	}

	// freeCharacter takes responsibility for checking
	// character for sanity before memory is freed
	freeCharacter();

	Common::String oldArchive = _disk->selectArchive((getFeatures() & GF_LANG_MULT) ? "disk1" : "disk0");
	_char._ani._cnv = _disk->loadFrames(_char.getFullName());

	if (!_char.dummy()) {
		if (getPlatform() == Common::kPlatformAmiga && (getFeatures() & GF_LANG_MULT))
			_disk->selectArchive("disk0");

		_char._head = _disk->loadHead(_char.getBaseName());
		_char._talk = _disk->loadTalk(_char.getBaseName());
		_char._objs = _disk->loadObjects(_char.getBaseName());
		_objectsNames = _disk->loadTable(_char.getBaseName());

		_soundMan->playCharacterMusic(_char.getBaseName());

		// The original engine used to reload 'common' only on loadgames. We are reloading here since 'common'
		// contains character specific stuff. This causes crashes like bug #1816899, because parseLocation tries
		// to reload scripts but the data archive selected is occasionally wrong. This has been solved by having
		// parseLocation only load scripts when they aren't already loaded - which it should have done since the
		// beginning nevertheless.
		if (!(getFeatures() & GF_DEMO))
			parseLocation("common");
	}

	if (!oldArchive.empty())
		_disk->selectArchive(oldArchive);

	strcpy(_characterName1, _char.getFullName());

	debugC(3, kDebugExec, "changeCharacter: switch completed");

	return;
}

void Parallaction_ns::initJobs() {

	static const JobFn jobs[] = {
		0,
		0,
		&Parallaction_ns::jobDisplayDroppedItem,
		&Parallaction_ns::jobRemovePickedItem,
		0,
		0,
		0,
		0,
		0,
		&Parallaction_ns::jobToggleDoor,
		0,
		0
	};

	_jobsFn = jobs;
}

JobOpcode* Parallaction_ns::createJobOpcode(uint functionId, Job *job) {
	return new OpcodeImpl2<Parallaction_ns>(this, _jobsFn[functionId], job);
}

void Parallaction_ns::cleanupGame() {

	_engineFlags &= ~kEngineTransformedDonna;

	// this code saves main character animation from being removed from the following code
	_animations.remove(&_char._ani);
	_numLocations = 0;
	_commandFlags = 0;

	memset(_localFlags, 0, sizeof(_localFlags));
	memset(_locationNames, 0, sizeof(_locationNames));

	// this flag tells freeZones to unconditionally remove *all* Zones
	_engineFlags |= kEngineQuit;

	freeZones();
	freeAnimations();

	// this dangerous flag can now be cleared
	_engineFlags &= ~kEngineQuit;

	// main character animation is restored
	_animations.push_front(&_char._ani);
	_score = 0;

	return;
}

} // namespace Parallaction