//===========================================
//  Lumina-DE source code
//  Copyright (c) 2014, Ken Moore
//  Available under the 3-clause BSD license
//  See the LICENSE file for full details
//===========================================
//  This class is a quick sample desktop plugin
//===========================================
#ifndef _LUMINA_DESKTOP_DESKTOP_PLUGIN_APPLICATION_LAUNCHER_H
#define _LUMINA_DESKTOP_DESKTOP_PLUGIN_APPLICATION_LAUNCHER_H

#include <QToolButton>
#include <QInputDialog>
#include <QVBoxLayout>
#include <QProcess>
#include <QFile>
#include <QFileSystemWatcher>
#include <QTimer>

#include "../LDPlugin.h"

#include <LuminaXDG.h>

class AppLauncherPlugin : public LDPlugin{
	Q_OBJECT
public:
	AppLauncherPlugin(QWidget* parent, QString ID) : LDPlugin(parent, ID){
	  this->setLayout( new QVBoxLayout());
	    this->layout()->setContentsMargins(0,0,0,0);
	  button = new QToolButton(this);
	    button->setToolButtonStyle(Qt::ToolButtonTextUnderIcon);
	    button->setIconSize(QSize(64,64));
	    button->setAutoRaise(true);
	  this->layout()->addWidget(button);
		connect(button, SIGNAL(clicked()), this, SLOT(buttonClicked()) );
	  watcher = new QFileSystemWatcher(this);
		connect(watcher, SIGNAL(fileChanged(QString)), this, SLOT( loadButton()) );
	  QTimer::singleShot(1,this, SLOT(loadButton()) );
	}
	
	~AppLauncherPlugin(){}
	
private:
	QToolButton *button;
	QFileSystemWatcher *watcher;

private slots:
	void loadButton(){
	  QString path = this->settings->value("applicationpath","").toString();
	  bool ok = false;
	  XDGDesktop file = LXDG::loadDesktopFile(path, ok);
	  if(path.isEmpty() || !QFile::exists(path) || !ok){
	    button->setWhatsThis("");
	    button->setIcon( LXDG::findIcon("quickopen-file","") );
	    button->setText( tr("Click to Set") );
	    if(!watcher->files().isEmpty()){ watcher->removePaths(watcher->files()); }
	  }else{
	    button->setWhatsThis(file.filePath);
	    button->setIcon( LXDG::findIcon(file.icon,"quickopen") );
	    button->setText( this->fontMetrics().elidedText(file.name, Qt::ElideRight, 64) );
	    if(!watcher->files().isEmpty()){ watcher->removePaths(watcher->files()); }
	    watcher->addPath(file.filePath); //make sure to update this shortcut if the file changes
	  }
	}
	
	void buttonClicked(){
	  QString path = button->whatsThis();
	  if(path.isEmpty() || !QFile::exists(path) ){
	    //prompt for the user to select an application
	    QList<XDGDesktop> apps = LXDG::sortDesktopNames( LXDG::systemDesktopFiles() );
	    QStringList names;
	    for(int i=0; i<apps.length(); i++){ names << apps[i].name; }
	    bool ok = false;
	    QString app = QInputDialog::getItem(this, tr("Select Application"), tr("Name:"), names, 0, false, &ok);
	    if(!ok || names.indexOf(app)<0){ return; } //cancelled
	    this->settings->setValue("applicationpath", apps[ names.indexOf(app) ].filePath);
	    QTimer::singleShot(0,this, SLOT(loadButton()));
	  }else{
	    QProcess::startDetached("lumina-open "+path);
	  }
	  
	}
};
#endif