/*
   mainwindow.cc
   This file is part of the Project::OSiRiON world editor 
   and is distributed under the terms and conditions of 
   the GNU General Public License version 2
*/

#include "mainwindow.h"
#include "editorwindow.h"

namespace editor
{

/**
 * @brief MainWindow is the application's main window.
 * The main window contains a QMdiArea that manages ZoneEditor children
 * */
MainWindow::MainWindow()
{
	// set window title
	setWindowTitle(tr("Project::OSiRiON world editor"));
	
	// initialize MDI (multiple document interface) area
	mainwindow_mdiarea = new QMdiArea();
	mainwindow_mdiarea->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
	mainwindow_mdiarea->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
	setCentralWidget(mainwindow_mdiarea);

	// initialize actions
	init_actions();
	
	// initialize menu bar
	init_menu();

}

void MainWindow::init_actions()
{
	// File -> New
	action_new = new QAction( tr("&New..."), this);
	action_new->setShortcuts(QKeySequence::New);
	action_new->setStatusTip(tr("Create a new zone"));
	connect(action_new, SIGNAL(triggered()), this, SLOT(slot_new()));
	
	// File -> Open
	action_open = new QAction( tr("&Open..."), this);
	action_open->setShortcuts(QKeySequence::Open);
	action_open->setStatusTip(tr("Open an existing zone"));
	connect(action_open, SIGNAL(triggered()), this, SLOT(slot_open()));
	
	action_save  = new QAction( tr("&Save..."), this);
	action_save->setShortcuts(QKeySequence::Save);
	action_save->setStatusTip(tr("Save File"));
	connect(action_save, SIGNAL(triggered()), this, SLOT(slot_save()));
	
	// File -> Quit
	action_quit = new QAction(tr("&Quit"), this);
	action_quit->setShortcuts(QKeySequence::Quit);
	action_quit->setStatusTip(tr("Exit the application"));
	connect(action_quit, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()));
}

void MainWindow::init_menu()
{
	mainwindow_filemenu = menuBar()->addMenu(tr("&File"));
	mainwindow_filemenu->addAction(action_new);
	mainwindow_filemenu->addAction(action_open);
	mainwindow_filemenu->addAction(action_save);
	mainwindow_filemenu->addSeparator();
	mainwindow_filemenu->addAction(action_quit);

	mainwindow_editmenu = menuBar()->addMenu(tr("&Edit"));
}


EditorWindow *MainWindow::active_child()
{
	if (QMdiSubWindow *active_subwindow = mainwindow_mdiarea->activeSubWindow())
		return qobject_cast<EditorWindow *>(active_subwindow->widget());
	return 0;
}

QMdiSubWindow *MainWindow::find_child(const QString &filename)
{

	QString canonical = QFileInfo(filename).canonicalFilePath();

	foreach (QMdiSubWindow *subwindow, mainwindow_mdiarea->subWindowList()) {
		EditorWindow *editorwindow = qobject_cast<EditorWindow *>(subwindow->widget());
		
		if (editorwindow->filename() == canonical)
			return subwindow;
	}
	return 0;

}

EditorWindow *MainWindow::add_child()
{
	// create a child widget
	EditorWindow *child_widget = new EditorWindow();

	// add the widget to the MDI area,
	// this will wrap an QMdiSubWindow around it
	QMdiSubWindow *subwindow = mainwindow_mdiarea->addSubWindow(child_widget);
	
	child_widget->show();
	mainwindow_mdiarea->setActiveSubWindow(subwindow);
	
	// FIXME check if maximized
	subwindow->resize(768, 512);
	
	return child_widget;
}

void MainWindow::slot_new()
{
	add_child();
}

void MainWindow::slot_open()
{
	QString filename = QFileDialog::getOpenFileName(this, tr("Open file"));
     
	if (!filename.isEmpty()) {
		QMdiSubWindow *subwindow = find_child(filename);
		
		if (subwindow) {
			mainwindow_mdiarea->setActiveSubWindow(subwindow);
		} else {
			EditorWindow *editorwindow = add_child();
			editorwindow->loadFile(filename);
		
			subwindow = find_child(filename);
			if (subwindow) {
				subwindow->setWindowTitle(editorwindow->filename());
			}
		}
	}
}

void MainWindow::slot_save()
{
	QString filename;
	
	if (active_child()) {
		active_child()->saveFile(filename);
	}
}

}