#include "lcdproc.h"
#include <qsocket.h>

/**
 * Constructor. Initiates the connection to the LCDproc server
 * specified in the config file.
 */
LCDproc::LCDproc(Config* conf):QObject(){
  config = conf;
  sendok = false;
  connect(&con,SIGNAL(connected()),
          this,SLOT(LCDinit()));
  connect(&con,SIGNAL(readyRead()),
          this,SLOT(feedback()));
  connect(&con,SIGNAL(error(int)),
          this,SLOT(error(int)));

  con.connectToHost(config->getOption("lcdserver"),
                    config->getOption("lcdport").toInt());
};

/**
 * This function is called when the connection to the LCDproc
 * server was successul. The LCD widgets are created here.
 */
void LCDproc::LCDinit(){
  qDebug("Connection to LCDproc established");
  sendCmd("hello");
  sendCmd("client_set -name IRFC2");
  sendCmd("screen_add lcd");
  sendCmd("screen_set lcd -wid -priority 192 "+
          config->getOption("lcdwidth")+
          " -hgt "+
          config->getOption("lcdheight")+
          " -heartbeat off");
  sendok = true;
  msgline = 1;
  if (config->getOption("lcdheight").toInt() > 1){
    sendCmd("widget_add lcd title string");
    sendCmd(QString("widget_set lcd title %1 1 {-=IRFC2=-}")
            .arg((config->getOption("lcdwidth").toInt()/2)-4));
    msgline = 2;
  }
  sendCmd("widget_add lcd msg scroller");
  LCDwrite("Welcome to IRFC2");
}

/**
 * SLOT. Send the given string to the LCD displays message scroller
 */
void LCDproc::LCDwrite(QString msg){
  if(!sendok) return;
  QString cmd("widget_set lcd msg 1 %1 %2 %3 h 2 {%4}");
  cmd = cmd.arg(msgline);
  cmd = cmd.arg(config->getOption("lcdwidth"));
  cmd = cmd.arg(msgline);
  cmd = cmd.arg(msg);
  sendCmd(cmd);
}

/**
 * Send a command to the LCDproc server. A newline is added before
 * send.
 */
void LCDproc::sendCmd(QString cmd){
  con.writeBlock(cmd+"\n",cmd.length()+1);
}

/**
 * SLOT. Is called when the connection to the LCDproc server fails.
 */ 
void LCDproc::error(int i){
  if(i == QSocket::ErrConnectionRefused){
    qWarning("LCDproc: the connection was refused");
  }else if(i == QSocket::ErrHostNotFound){
    qWarning("LCDproc: the host was not found");
  }else if(i == QSocket::ErrSocketRead){
    qWarning("LCDproc: read from the socket failed");
  }
  qWarning("Connection to LCDproc failed - No LCD support");
  sendok=false;
}

/**
 * SLOT. Prints all feedback except 'success' messages from LCDproc
 * to STDERR
 */
void LCDproc::feedback(){
  QString msg;
  while(con.canReadLine()){
    msg = con.readLine().stripWhiteSpace();
    if(msg == "success") continue;
    qDebug("LCDproc: %s",msg.latin1());
  }
}