#include <QtGui>

#include "doxywizard.h"

#include "version.h"

#include "expert.h"

#include "wizard.h"

const int messageTimeout = 5000; //!< status bar message timeout in millisec.

MainWindow &MainWindow::instance()

{

  static MainWindow *theInstance = new MainWindow;

  return *theInstance;

}

MainWindow::MainWindow()

  : m_settings(QString::fromAscii("Doxygen.org"), QString::fromAscii("Doxywizard"))

{

  QMenu *file = menuBar()->addMenu(tr("File"));

  file->addAction(tr("Open..."), 

                  this, SLOT(openConfig()), Qt::CTRL+Qt::Key_O);

  m_recentMenu = file->addMenu(tr("Open recent"));

  file->addAction(tr("Save"), 

                  this, SLOT(saveConfig()), Qt::CTRL+Qt::Key_S);

  file->addAction(tr("Save as..."), 

                  this, SLOT(saveConfigAs()), Qt::SHIFT+Qt::CTRL+Qt::Key_S);

  file->addAction(tr("Quit"),  

                  this, SLOT(quit()), Qt::CTRL+Qt::Key_Q);

  QMenu *settings = menuBar()->addMenu(tr("Settings"));

  settings->addAction(tr("Reset to factory defaults"),

                  this,SLOT(resetToDefaults()));

  settings->addAction(tr("Use current settings at startup"),

                  this,SLOT(makeDefaults()));

  QMenu *help = menuBar()->addMenu(tr("Help"));

  help->addAction(tr("Online manual"), 

                  this, SLOT(manual()), Qt::Key_F1);

  help->addAction(tr("About"), 

                  this, SLOT(about()) );

  m_expert = new Expert;

  m_wizard = new Wizard(m_expert->modelData());

  // ----------- top part ------------------

  QWidget *topPart = new QWidget;

  QVBoxLayout *rowLayout = new QVBoxLayout(topPart);

  // select working directory

  QHBoxLayout *dirLayout = new QHBoxLayout;

  m_workingDir = new QLineEdit;

  m_selWorkingDir = new QPushButton(tr("Select..."));

  dirLayout->addWidget(m_workingDir);

  dirLayout->addWidget(m_selWorkingDir);

  //------------- bottom part --------------

  QWidget *runTab = new QWidget;

  QVBoxLayout *runTabLayout = new QVBoxLayout(runTab);

  // run doxygen

  QHBoxLayout *runLayout = new QHBoxLayout;

  m_run = new QPushButton(tr("Run doxygen"));

  m_run->setEnabled(false);

  m_runStatus = new QLabel(tr("Status: not running"));

  m_saveLog = new QPushButton(tr("Save log..."));

  m_saveLog->setEnabled(false);

  QPushButton *showSettings = new QPushButton(tr("Show configuration"));

  runLayout->addWidget(m_run);

  runLayout->addWidget(m_runStatus);

  runLayout->addStretch(1);

  runLayout->addWidget(showSettings);

  runLayout->addWidget(m_saveLog);

  // output produced by doxygen

  runTabLayout->addLayout(runLayout);

  runTabLayout->addWidget(new QLabel(tr("Output produced by doxygen")));

  QGridLayout *grid = new QGridLayout;

  m_outputLog = new QTextEdit;

  m_outputLog->setReadOnly(true);

  m_outputLog->setFontFamily(QString::fromAscii("courier"));

  m_outputLog->setMinimumWidth(600);

  grid->addWidget(m_outputLog,0,0);

  grid->setColumnStretch(0,1);

  grid->setRowStretch(0,1);

  QHBoxLayout *launchLayout = new QHBoxLayout;

  m_launchHtml = new QPushButton(tr("Show HTML output"));

  launchLayout->addWidget(m_launchHtml);

  launchLayout->addStretch(1);

  grid->addLayout(launchLayout,1,0);

  runTabLayout->addLayout(grid);

  QTabWidget *tabs = new QTabWidget;

  tabs->addTab(m_wizard,tr("Wizard"));

  tabs->addTab(m_expert,tr("Expert"));

  tabs->addTab(runTab,tr("Run"));

  rowLayout->addWidget(new QLabel(tr("Step 1: Specify the working directory from which doxygen will run")));

  rowLayout->addLayout(dirLayout);

  rowLayout->addWidget(new QLabel(tr("Step 2: Configure doxygen using the Wizard and/or Expert tab, then switch to the Run tab to generate the documentation")));

  rowLayout->addWidget(tabs);

  setCentralWidget(topPart);

  statusBar()->showMessage(tr("Welcome to Doxygen"),messageTimeout);

  loadSettings();

  m_runProcess = new QProcess;

  m_running = false;

  m_timer = new QTimer;

  updateLaunchButtonState();

  m_modified = false;

  updateTitle();

  // connect signals and slots

  connect(tabs,SIGNAL(currentChanged(int)),SLOT(selectTab(int)));

  connect(m_selWorkingDir,SIGNAL(clicked()),SLOT(selectWorkingDir()));

  connect(m_recentMenu,SIGNAL(triggered(QAction*)),SLOT(openRecent(QAction*)));

  connect(m_workingDir,SIGNAL(returnPressed()),SLOT(updateWorkingDir()));

  connect(m_runProcess,SIGNAL(readyReadStandardOutput()),SLOT(readStdout()));

  connect(m_runProcess,SIGNAL(finished(int, QProcess::ExitStatus)),SLOT(runComplete()));

  connect(m_timer,SIGNAL(timeout()),SLOT(readStdout()));

  connect(m_run,SIGNAL(clicked()),SLOT(runDoxygen()));

  connect(m_launchHtml,SIGNAL(clicked()),SLOT(showHtmlOutput()));

  connect(m_saveLog,SIGNAL(clicked()),SLOT(saveLog()));

  connect(showSettings,SIGNAL(clicked()),SLOT(showSettings()));

  connect(m_expert,SIGNAL(changed()),SLOT(configChanged()));

}

void MainWindow::closeEvent(QCloseEvent *event)

{

  if (discardUnsavedChanges())

  {

    saveSettings();

    event->accept();

  }

  else

  {

    event->ignore();

  }

}

void MainWindow::quit()

{

  if (discardUnsavedChanges())

  {

    saveSettings();

  }

  QApplication::exit(0);

}

void MainWindow::setWorkingDir(const QString &dirName)

{

    QDir::setCurrent(dirName);

    m_workingDir->setText(dirName);

    m_run->setEnabled(!dirName.isEmpty());

}

void MainWindow::selectWorkingDir()

{

  QString dirName = QFileDialog::getExistingDirectory(this,

        tr("Select working directory"),m_workingDir->text());

  if (!dirName.isEmpty())

  {

    setWorkingDir(dirName);

  }

}

void MainWindow::updateWorkingDir()

{

  setWorkingDir(m_workingDir->text());

}

void MainWindow::manual()

{

  QDesktopServices::openUrl(QUrl(QString::fromAscii("http://www.doxygen.org/manual.html")));

}

void MainWindow::about()

{

  QString msg;

  QTextStream t(&msg,QIODevice::WriteOnly);

  t << QString::fromAscii("<qt><center>A tool to configure and run doxygen version ")+

       QString::fromAscii(versionString)+

       QString::fromAscii(" on your source files.</center><p><br>"

       "<center>Written by<br> Dimitri van Heesch<br>&copy; 2000-2009</center><p>"

       "</qt>");

  QMessageBox::about(this,tr("Doxygen GUI"),msg);

}

void MainWindow::openConfig()

{

  if (discardUnsavedChanges(false))

  {

    QString fn = QFileDialog::getOpenFileName(this,

        tr("Open configuration file"),

        m_workingDir->text());

    if (!fn.isEmpty())

    {

      loadConfigFromFile(fn);

    }

  }

}

void MainWindow::updateConfigFileName(const QString &fileName)

{

  if (m_fileName!=fileName)

  {

    m_fileName = fileName;

    QString curPath = QFileInfo(fileName).path();

    setWorkingDir(curPath);

    addRecentFile(fileName);

    updateTitle();

  }

}

void MainWindow::loadConfigFromFile(const QString & fileName)

{

  m_expert->loadConfig(fileName);

  m_wizard->refresh();

  updateConfigFileName(fileName);

  updateLaunchButtonState();

  m_modified = false;

  updateTitle();

}

void MainWindow::saveConfig(const QString &fileName)

{

  if (fileName.isEmpty()) return;

  QFile f(fileName);

  if (!f.open(QIODevice::WriteOnly)) 

  {

    QMessageBox::warning(this,

        tr("Error saving"),

        tr("Error: cannot open the file ")+fileName+tr(" for writing!\n")+

        tr("Reason given: ")+f.error());

    return;

  }

  QTextStream t(&f);

  m_expert->writeConfig(t,false);

  updateConfigFileName(fileName);

  m_modified = false;

  updateTitle();

}

bool MainWindow::saveConfig()

{

  if (m_fileName.isEmpty())

  {

    return saveConfigAs();

  }

  else

  {

    saveConfig(m_fileName);

    return true;

  }

}

bool MainWindow::saveConfigAs()

{

  QString fileName = QFileDialog::getSaveFileName(this, QString(), 

             m_workingDir->text()+QString::fromAscii("/Doxyfile"));

  if (fileName.isEmpty()) return false;

  saveConfig(fileName);

  return true;

}

void MainWindow::makeDefaults()

{

  if (QMessageBox::question(this,tr("Use current setting at startup?"),

                        tr("Do you want to save the current settings "

                           "and use them next time Doxywizard starts?"),

                        QMessageBox::Save|

                        QMessageBox::Cancel)==QMessageBox::Save)

  {

    //printf("MainWindow:makeDefaults()\n");

    m_expert->saveSettings(&m_settings);

    m_settings.setValue(QString::fromAscii("wizard/loadsettings"), true);

  }

}

void MainWindow::resetToDefaults()

{

  if (QMessageBox::question(this,tr("Reset settings to their default values?"),

                        tr("Do you want to revert all settings back "

                           "to their original values?"),

                        QMessageBox::Reset|

                        QMessageBox::Cancel)==QMessageBox::Reset)

  {

    //printf("MainWindow:resetToDefaults()\n");

    m_expert->resetToDefaults();

    m_settings.setValue(QString::fromAscii("wizard/loadsettings"), false);

    m_wizard->refresh();

  }

}

void MainWindow::loadSettings()

{

  QVariant geometry     = m_settings.value(QString::fromAscii("main/geometry"), QVariant::Invalid);

  QVariant state        = m_settings.value(QString::fromAscii("main/state"),    QVariant::Invalid);

  QVariant wizState     = m_settings.value(QString::fromAscii("wizard/state"),  QVariant::Invalid);

  QVariant loadSettings = m_settings.value(QString::fromAscii("wizard/loadsettings"),  QVariant::Invalid);

  if (geometry  !=QVariant::Invalid) restoreGeometry(geometry.toByteArray());

  if (state     !=QVariant::Invalid) restoreState   (state.toByteArray());

  if (wizState  !=QVariant::Invalid) m_wizard->restoreState(wizState.toByteArray());

  if (loadSettings!=QVariant::Invalid && loadSettings.toBool())

  {

    m_expert->loadSettings(&m_settings);

  }

  for (int i=0;i<10;i++)

  {

    QString entry = m_settings.value(QString().sprintf("recent/config%d",i)).toString();

    if (!entry.isEmpty()) addRecentFile(entry);

  }

}

void MainWindow::saveSettings()

{

  QSettings settings(QString::fromAscii("Doxygen.org"), QString::fromAscii("Doxywizard"));

  m_settings.setValue(QString::fromAscii("main/geometry"), saveGeometry());

  m_settings.setValue(QString::fromAscii("main/state"),    saveState());

  m_settings.setValue(QString::fromAscii("wizard/state"),  m_wizard->saveState());

}

void MainWindow::selectTab(int id)

{

  if (id==0) m_wizard->refresh();

}

void MainWindow::addRecentFile(const QString &fileName)

{

  int i=m_recentFiles.indexOf(fileName);

  if (i!=-1) m_recentFiles.removeAt(i);

  // not found

  if (m_recentFiles.count() < 10) // append

  {

    m_recentFiles.prepend(fileName);

  }

  else // add + drop last item

  {

    m_recentFiles.removeLast();

    m_recentFiles.prepend(fileName);

  }

  m_recentMenu->clear();

  i=0;

  foreach( QString str, m_recentFiles ) 

  {

    m_recentMenu->addAction(str);

    m_settings.setValue(QString().sprintf("recent/config%d",i++),str);

  }

}

void MainWindow::openRecent(QAction *action)

{

  if (discardUnsavedChanges(false))

  {

    loadConfigFromFile(action->text());

  }

}

void MainWindow::runDoxygen()

{

  if (!m_running)

  {

    QString doxygenPath; 

#if defined(Q_OS_MACX)

    doxygenPath = qApp->applicationDirPath()+QString::fromAscii("/../Resources/");

    qDebug() << tr("Doxygen path: ") << doxygenPath;

    if ( !QFile(doxygenPath + QString::fromAscii("doxygen")).exists() ) 

    {

      // No doygen binary in the resources, if there is a system doxygen binary, use that instead

      if ( QFile(QString::fromAscii("/usr/local/bin/doxygen")).exists() )

      {

        doxygenPath = QString::fromAscii("/usr/local/bin/");

      }

      else 

      {

        qDebug() << tr("Can't find the doxygen command, make sure it's in your $$PATH");

        doxygenPath = QString::fromAscii("");

      }

    }

    qDebug() << tr("Getting doxygen from: ") << doxygenPath;

#endif

    m_runProcess->setReadChannel(QProcess::StandardOutput);

    m_runProcess->setProcessChannelMode(QProcess::MergedChannels);

    m_runProcess->setWorkingDirectory(m_workingDir->text());

    QStringList env=QProcess::systemEnvironment();

    // set PWD environment variable to m_workingDir

    env.replaceInStrings(QRegExp(QString::fromAscii("^PWD=(.*)"),Qt::CaseInsensitive), 

                         QString::fromAscii("PWD=")+m_workingDir->text());

    m_runProcess->setEnvironment(env);

    QStringList args;

    args << QString::fromAscii("-b"); // make stdout unbuffered

    args << QString::fromAscii("-");  // read config from stdin

    m_outputLog->clear();

    m_runProcess->start(doxygenPath + QString::fromAscii("doxygen"), args);

    if (!m_runProcess->waitForStarted())

    {

      m_outputLog->append(QString::fromAscii("*** Failed to run doxygen\n"));

      return;

    }

    QTextStream t(m_runProcess);

    m_expert->writeConfig(t,false);

    m_runProcess->closeWriteChannel();

    if (m_runProcess->state() == QProcess::NotRunning)

    {

      m_outputLog->append(QString::fromAscii("*** Failed to run doxygen\n"));

    }

    else

    {

      m_saveLog->setEnabled(false);

      m_running=true;

      m_run->setText(tr("Stop doxygen"));

      m_runStatus->setText(tr("Status: running"));

      m_timer->start(1000);

    }

  }

  else

  {

    m_running=false;

    m_run->setText(tr("Run doxygen"));

    m_runStatus->setText(tr("Status: not running"));

    m_runProcess->kill();

    m_timer->stop();

    //updateRunnable(m_workingDir->text());

  }

}

void MainWindow::readStdout()

{

  if (m_running)

  {

    QByteArray data = m_runProcess->readAllStandardOutput();

    QString text = QString::fromLocal8Bit(data);

    if (!text.isEmpty())

    {

      m_outputLog->append(text.trimmed());

    }

  }

}

void MainWindow::runComplete()

{

  if (m_running)

  {

    m_outputLog->append(tr("*** Doxygen has finished\n"));

  }

  else

  {

    m_outputLog->append(tr("*** Cancelled by user\n"));

  }

  m_outputLog->ensureCursorVisible();

  m_run->setText(tr("Run doxygen"));

  m_runStatus->setText(tr("Status: not running"));

  m_running=false;

  updateLaunchButtonState();

  //updateRunnable(m_workingDir->text());

  m_saveLog->setEnabled(true);

}

void MainWindow::updateLaunchButtonState()

{

  m_launchHtml->setEnabled(m_expert->htmlOutputPresent(m_workingDir->text()));

#if 0

  m_launchPdf->setEnabled(m_expert->pdfOutputPresent(m_workingDir->text()));

#endif

}

void MainWindow::showHtmlOutput()

{

  QString indexFile = m_expert->getHtmlOutputIndex(m_workingDir->text());

  QFileInfo fi(indexFile);

#ifdef WIN32

  QString indexUrl(QString::fromAscii("file:///"));

#else

  QString indexUrl(QString::fromAscii("file://"));

#endif

  indexUrl+=fi.absoluteFilePath();

  QDesktopServices::openUrl(QUrl(indexUrl));

}

void MainWindow::saveLog()

{

  QString fn = QFileDialog::getSaveFileName(this, tr("Save log file"), 

        m_workingDir->text()+

        QString::fromAscii("/doxygen_log.txt"));

  if (!fn.isEmpty())

  {

    QFile f(fn);

    if (f.open(QIODevice::WriteOnly))

    {

      QTextStream t(&f);

      t << m_outputLog->toPlainText();

      statusBar()->showMessage(tr("Output log saved"),messageTimeout);

    }

    else

    {

      QMessageBox::warning(0,tr("Warning"),

          tr("Cannot open file ")+fn+tr(" for writing. Nothing saved!"),tr("ok"));

    }

  }

}

void MainWindow::showSettings()

{

  QString text;

  QTextStream t(&text);

  m_expert->writeConfig(t,true);

  m_outputLog->clear();

  m_outputLog->append(text);

  m_outputLog->ensureCursorVisible();

  m_saveLog->setEnabled(true);

}

void MainWindow::configChanged()

{

  m_modified = true;

  updateTitle();

}