/***************************************************************************
 *   Copyright (C) 2008 by Oliver Groß                                     *
 *   z.o.gross@gmx.de                                                      *
 *                                                                         *
 *   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.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#include <QApplication>
#include <QStatusBar>
#include <QMenuBar>
#include <QMenu>
#include <QToolBar>
#include <QAction>
#include <QFileDialog>
#include <QMessageBox>
#include <QDir>
#include <QInputDialog>

#include <libqnono/cnonogram.h>
#include <libqnono/ccrosspackage.h>

#include "constants.h"
#include "cgamewindow.h"
#include "ccrossfieldwidget.h"
#include "cnewgamedialog.h"
#include "chighscore.h"

namespace qcross {
	using namespace libqnono;
//public
	CGameWindow::CGameWindow(QWidget * parent) : QMainWindow(parent) {
		m_Field = new CCrossFieldWidget(this);
		m_Nonogram = m_Field->nonogram();
		
		setCentralWidget(m_Field);
		m_Field->showMessage(tr("Welcome to QCross!"));
		
		createActions();
		
		connect(m_Nonogram, SIGNAL(won(int)), this, SLOT(wonGame(int)));
		connect(m_Nonogram, SIGNAL(timeup()), this, SLOT(lostGame()));
		
		connect(m_Nonogram, SIGNAL(loaded()), SLOT(updateStates()));
		connect(m_Nonogram, SIGNAL(restarted()), SLOT(updateStates()));
		connect(m_Nonogram, SIGNAL(paused(int)), SLOT(updateStates()));
		connect(m_Nonogram, SIGNAL(resumed(int)), SLOT(updateStates()));
	}
	
	CGameWindow::~CGameWindow() {
	}
	
//protected
	void CGameWindow::createActions() {
		QToolBar * currentToolBar;
		QMenu * currentMenu;
		
		//Game
		currentMenu = menuBar()->addMenu(tr("&Game"));
		currentMenu->addAction(tr("&New..."), this, SLOT(newGame()), Qt::CTRL + Qt::Key_N);
		currentMenu->addSeparator();
		m_SaveGameAction = currentMenu->addAction(tr("&Save..."), this, SLOT(saveGame()), Qt::CTRL + Qt::Key_N);
		m_SaveGameAction->setEnabled(false);
		currentMenu->addAction(tr("&Load..."), this, SLOT(loadGame()), Qt::CTRL + Qt::Key_N);
		currentMenu->addSeparator();
		m_RestartGameAction = currentMenu->addAction(tr("&Restart"), m_Nonogram, SLOT(restart()), Qt::CTRL + Qt::Key_R);
		m_RestartGameAction->setEnabled(false);
		m_PauseGameAction = currentMenu->addAction(tr("&Pause"));
		m_PauseGameAction->setEnabled(false);
		m_PauseGameAction->setCheckable(true);
		m_PauseGameAction->setShortcut(Qt::CTRL + Qt::Key_P);
		connect(m_PauseGameAction, SIGNAL(toggled(bool)), this, SLOT(pauseGame(bool)));
		currentMenu->addSeparator();
		currentMenu->addAction(tr("&Quit"), this, SLOT(close()), Qt::CTRL + Qt::Key_Q);
		currentMenu->addSeparator();
		currentMenu->addAction(tr("debug: solve"), m_Nonogram, SLOT(solve()));
		
		currentToolBar = addToolBar(currentMenu->title());
		currentToolBar->addActions(currentMenu->actions());
		
		//Help
		currentMenu = menuBar()->addMenu(tr("&Help"));
		currentMenu->addAction(tr("&About"), this, SLOT(about()));
		currentMenu->addAction(tr("About &Qt"), qApp, SLOT(aboutQt()));
	}
	
	void CGameWindow::newGame() {
		bool notPaused = !m_Nonogram->isPaused();
		if (notPaused)
			m_Nonogram->pause();
		
		CNewGameDialog dialog;
		if (dialog.exec() == QDialog::Accepted) {
			m_Nonogram->start(dialog.getProblem());
			return;
		}
		
		if (notPaused)
			m_Nonogram->resume();
	}
	
	
	void CGameWindow::saveGame() {
		bool notPaused = !m_Nonogram->isPaused();
		if (notPaused)
			m_Nonogram->pause();
		
		QString fileName = QFileDialog::getSaveFileName(this, tr("Save current game"),
			QDir::homePath(), tr("QCross Saved games (*.csg)"));
		
		m_Nonogram->saveGame(fileName);
		
		if (notPaused)
			m_Nonogram->resume();
	}
	
	void CGameWindow::loadGame() {
		bool notPaused = !m_Nonogram->isPaused();
		if (notPaused)
			m_Nonogram->pause();
		
		QString fileName = QFileDialog::getOpenFileName(this, tr("Open saved game"),
			QDir::homePath(), tr("QCross Saved games (*.csg)"));
		
		if (m_Nonogram->loadGame(fileName)) {
			return;
		}
		
		if (notPaused)
			m_Nonogram->resume();
	}
	
	void CGameWindow::pauseGame(bool value) {
		if (value == m_Nonogram->isPaused())
			return;
		
		if (value) {
			m_Nonogram->pause();
		}
		else {
			m_Nonogram->resume();
		}
	}
	
	void CGameWindow::wonGame(int score) {
		m_PauseGameAction->setEnabled(false);
		if (score < 0) return;
		const NonogramProblem &problem(m_Nonogram->problem());
		if (!problem.packageIdentifier().isEmpty() && problem.packageIndex() >= 0) {
			CHighscore highscore;
			highscore.setPackageIdentifier(problem.packageIdentifier());
			if (highscore.open()) {
				int oldScore = highscore[problem.packageIndex()];
				if (0 == oldScore || (problem.timeout() > 0 ? score > oldScore : score < oldScore)) {
					qDebug("attempting to save highscore");
					highscore[problem.packageIndex()] = score;
					highscore.save();
				}
			}
		}
	}
	
	void CGameWindow::lostGame() {
		m_PauseGameAction->setEnabled(false);
	}
	
	void CGameWindow::about() {
		QMessageBox::about(this, tr("About"), tr("This is a still unfancy gui for solving nonograms."));
	}
	
	void CGameWindow::updateStates() {
		bool valid = m_Nonogram->valid();
		m_SaveGameAction->setEnabled(valid);
		m_PauseGameAction->setEnabled(valid);
		m_RestartGameAction->setEnabled(valid);
		m_PauseGameAction->setChecked(m_Nonogram->isPaused());
	}
}