/* 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/>.
 *
 */

/*
 * This code is based on the original source code of Lord Avalot d'Argent version 1.3.
 * Copyright (c) 1994-1995 Mike, Mark and Thomas Thurman.
 */

#include "avalanche/avalanche.h"
#include "avalanche/mainmenu.h"

#include "common/system.h"

namespace Avalanche {

MainMenu::MainMenu(AvalancheEngine *vm) {
	_vm = vm;

	_registrant = Common::String("");
}

void MainMenu::run() {
	CursorMan.showMouse(false);
	_vm->_graphics->menuInitialize();
	_vm->_graphics->menuLoadPictures();
	loadRegiInfo();
	loadFont();

	option(1, "Play the game.");
	option(2, "Read the background.");
	option(3, "Preview... perhaps...");
	option(4, "View the documentation.");
	option(5, "Registration info.");
	option(6, "Exit back to DOS.");
	centre(274, _registrant);
	centre(301, "Make your choice, or wait for the demo.");

	_vm->_graphics->menuRefreshScreen();

	wait();
}

void MainMenu::loadFont() {
	Common::File file;
	if (!file.open("avalot.fnt"))
		error("AVALANCHE: Scrolls: File not found: avalot.fnt");
	for (int16 i = 0; i < 256; i++)
		file.read(_font[i], 16);
	file.close();
}

void MainMenu::loadRegiInfo() {
	_registrant = "(Unregistered evaluation copy.)";
	warning("STUB: MainMenu::loadRegiInfo()");
}

void MainMenu::option(byte which, Common::String what) {
	_vm->_graphics->menuDrawBigText(_font, 127, 39 + which * 33, Common::String(which + 48) + ')', kColorBlack);
	_vm->_graphics->menuDrawBigText(_font, 191, 39 + which * 33, what, kColorBlack);
}

void MainMenu::centre(int16 y, Common::String text) {
	_vm->_graphics->menuDrawBigText(_font, 320 - text.size() * 8, y, text, kColorLightgray);
}

void MainMenu::wait() {
	int x = 0;
	while (!_vm->shouldQuit()) {
		_vm->_graphics->menuDrawIndicator(x);
		_vm->_system->delayMillis(40);
		x++;
		if (x == 641)
			x = 0;
		Common::Event event;
		_vm->getEvent(event);
		if (event.type == Common::EVENT_KEYDOWN) {
			switch (event.kbd.keycode) {
			case Common::KEYCODE_SPACE:
			case Common::KEYCODE_RETURN:
			case Common::KEYCODE_1: // Falltroughs are inteded.
				// Play the game
				_vm->_graphics->menuFree();
				_vm->_graphics->menuRestoreScreen();
				CursorMan.showMouse(true);
				return;
			case Common::KEYCODE_ESCAPE:
			case Common::KEYCODE_6: // Falltroughs are inteded.
				// Exit back to DOS
				_vm->_letMeOut = true;
				_vm->_graphics->menuFree();
				return;
			default:
				break;
			}
		}
	}
}

} // End of namespace Avalanche