//===========================================
//  Lumina-DE source code
//  Copyright (c) 2015, Ken Moore
//  Available under the 3-clause BSD license
//  See the LICENSE file for full details
//===========================================
#include "TerminalWidget.h"

#include <QProcessEnvironment>
#include <QDebug>
#include <QApplication>
#include <QScrollBar>

TerminalWidget::TerminalWidget(QWidget *parent, QString dir) : QTextEdit(parent){
  //Setup the text widget
  this->setLineWrapMode(QTextEdit::WidgetWidth);
  //this->setReadOnly(true); //the key event catch will do the process/widget forwarding
  //this->setPlainText("WARNING: This utility is still incomplete and does not function properly yet");
  
  //Create/open the TTY port
  PROC = new TTYProcess(this);
  qDebug() << "Open new TTY";
  //int fd;
  bool ok = PROC->startTTY( QProcessEnvironment::systemEnvironment().value("SHELL","/bin/sh") );
  qDebug() << " - opened:" << ok;
  this->setEnabled(PROC->isOpen());

  //Connect the signals/slots
  connect(PROC, SIGNAL(readyRead()), this, SLOT(UpdateText()) );
  connect(PROC, SIGNAL(processClosed()), this, SLOT(ShellClosed()) );
  
}

TerminalWidget::~TerminalWidget(){
  aboutToClose();
}

void TerminalWidget::aboutToClose(){
  if(PROC->isOpen()){ PROC->closeTTY(); } //TTY PORT
}

// ==================
//    PRIVATE SLOTS
// ==================
void TerminalWidget::UpdateText(){
  //read the data from the process
  //qDebug() << "UpdateText";
  if(!PROC->isOpen()){ return; }
  QByteArray buffer = PROC->readTTY();
  QString text = QString(buffer);
    text.replace("\r\n","\n");
  this->insertPlainText(text);
  //adjust the scrollbar as needed
  this->verticalScrollBar()->setValue(this->verticalScrollBar()->maximum());
}

void TerminalWidget::ShellClosed(){
  emit ProcessClosed(this->whatsThis());
}

// ==================
//       PROTECTED
// ==================
void TerminalWidget::keyPressEvent(QKeyEvent *ev){
    //Check for special key combinations first
    QString txt = ev->text();
    if(txt.isEmpty()){ return; } // modifier key - nothing to send yet
    /*switch(ev->key()){
	//case Qt::Key_Backspace:
	case Qt::Key_Left:
	case Qt::Key_Right:
	case Qt::Key_Up:
	case Qt::Key_Down:
	  break;
	//case Qt::Key_Return:
	//case Qt::Key_Enter:
	  //txt = "\r";
	//default:
	  //All other events can get echoed onto the widget (non-movement)
	  //QTextEdit::keyPressEvent(ev); //echo the input on the widget
    }*/
  QByteArray ba; ba.append(txt); //avoid any byte conversions
  //qDebug() << "Forward Input:" << txt << ev->key() << ba;
  PROC->writeTTY(ba);
  ev->ignore();
}

void TerminalWidget::mousePressEvent(QMouseEvent *ev){
  this->setFocus();
  Q_UNUSED(ev);
}

void TerminalWidget::mouseDoubleClickEvent(QMouseEvent *ev){
  Q_UNUSED(ev);	
}

void TerminalWidget::contextMenuEvent(QContextMenuEvent *ev){
  Q_UNUSED(ev);	
}