/*
 *      settingsdialog.cpp
 *
 *      Copyright 2008 gpg4usb-team <gpg4usb@cpunk.de>
 *
 *      This file is part of gpg4usb.
 *
 *      Gpg4usb is free software: you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License as published by
 *      the Free Software Foundation, either version 3 of the License, or
 *      (at your option) any later version.
 *
 *      Gpg4usb is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *      GNU General Public License for more details.
 *
 *      You should have received a copy of the GNU General Public License
 *      along with gpg4usb.  If not, see <http://www.gnu.org/licenses/>
 */

#include "settingsdialog.h"

SettingsDialog::SettingsDialog(QWidget *parent)
    : QDialog(parent)
{
    tabWidget = new QTabWidget;
    generalTab = new GeneralTab;
    appearanceTab = new AppearanceTab;
    mimeTab = new MimeTab;
    keyserverTab = new KeyserverTab;

    tabWidget->addTab(generalTab, tr("General"));
    tabWidget->addTab(appearanceTab, tr("Appearance"));
    tabWidget->addTab(mimeTab, tr("PGP/Mime"));
    tabWidget->addTab(keyserverTab, tr("Keyserver"));
    buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok
                                     | QDialogButtonBox::Cancel);

    connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
    connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addWidget(tabWidget);
    mainLayout->addWidget(buttonBox);
    setLayout(mainLayout);

    setWindowTitle(tr("Settings"));

    exec(); 
}

void SettingsDialog::accept()
{
    generalTab->applySettings();
    mimeTab->applySettings();
    appearanceTab->applySettings();
    keyserverTab->applySettings();
    close();
}


GeneralTab::GeneralTab(QWidget *parent)
    : QWidget(parent)
{

    /*****************************************
     * remember Password-Box
     *****************************************/
    QGroupBox *rememberPasswordBox = new QGroupBox(tr("Remember Password"));
    QHBoxLayout *rememberPasswordBoxLayout = new QHBoxLayout();
    rememberPasswordCheckBox = new QCheckBox(tr("Remember password until closing gpg4usb"), this);
    rememberPasswordBoxLayout->addWidget(rememberPasswordCheckBox);
    rememberPasswordBox->setLayout(rememberPasswordBoxLayout);

    /*****************************************
     * Save-Checked-Keys-Box
     *****************************************/
    QGroupBox *saveCheckedKeysBox = new QGroupBox(tr("Save Checked Keys"));
    QHBoxLayout *saveCheckedKeysBoxLayout = new QHBoxLayout();
    saveCheckedKeysCheckBox = new QCheckBox(tr("Save checked private keys on exit and restore them on next start."), this);
    saveCheckedKeysBoxLayout->addWidget(saveCheckedKeysCheckBox);
    saveCheckedKeysBox->setLayout(saveCheckedKeysBoxLayout);

    /*****************************************
     * Key-Impport-Confirmation Box
     *****************************************/
    QGroupBox *importConfirmationBox = new QGroupBox(tr("Confirm drag'n'drop key import"));
    QHBoxLayout *importConfirmationBoxLayout = new QHBoxLayout();
    importConfirmationCheckBox= new QCheckBox(tr("Import files dropped on the keylist without confirmation."), this);
    importConfirmationBoxLayout->addWidget(importConfirmationCheckBox);
    importConfirmationBox->setLayout(importConfirmationBoxLayout);

    /*****************************************
     * Language Select Box
     *****************************************/
    QGroupBox *langBox = new QGroupBox(tr("Language"));
    QVBoxLayout *langBoxLayout = new QVBoxLayout();
    langSelectBox = new QComboBox;
    lang = listLanguages();

    foreach(QString l , lang) {
        langSelectBox->addItem(l);
    }

    langBoxLayout->addWidget(langSelectBox);
    QLabel *langNote = new QLabel(tr("Language change is applied after restarting program."));
    langBoxLayout->addWidget(langNote);
    langBox->setLayout(langBoxLayout);

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addWidget(rememberPasswordBox);
    mainLayout->addWidget(saveCheckedKeysBox);
    mainLayout->addWidget(importConfirmationBox);
    mainLayout->addWidget(langBox);
    setSettings();
    mainLayout->addStretch(1);
    setLayout(mainLayout);
}

/**********************************
 * Read the settings from config
 * and set the buttons and checkboxes
 * appropriately
 **********************************/
void GeneralTab::setSettings()
{
    QSettings settings;
    // Keysaving
    if (settings.value("keys/keySave").toBool()) saveCheckedKeysCheckBox->setCheckState(Qt::Checked);

    // Remember Password
    if (settings.value("general/rememberPassword").toBool()) rememberPasswordCheckBox->setCheckState(Qt::Checked);

    // Language setting
    QString langKey = settings.value("int/lang").toString();
    QString langValue = lang.value(langKey);
    if (langKey != "") {
        langSelectBox->setCurrentIndex(langSelectBox->findText(langValue));
    }
    // Ask for confirmation to import, if keyfiles are dropped on keylist
    if (settings.value("general/confirmImportKeys",Qt::Checked).toBool()){
        importConfirmationCheckBox->setCheckState(Qt::Checked);
    }
}

/***********************************
  * get the values of the buttons and
  * write them to settings-file
  *************************************/
void GeneralTab::applySettings()
{
    QSettings settings;
    settings.setValue("keys/keySave", saveCheckedKeysCheckBox->isChecked());
    // TODO: clear passwordCache instantly on unset rememberPassword
    settings.setValue("general/rememberPassword", rememberPasswordCheckBox->isChecked());
    settings.setValue("int/lang", lang.key(langSelectBox->currentText()));
    settings.setValue("general/confirmImportKeys", importConfirmationCheckBox->isChecked());
}

// http://www.informit.com/articles/article.aspx?p=1405555&seqNum=3
QHash<QString, QString> GeneralTab::listLanguages()
{
    QHash<QString, QString> languages;

    languages.insert("", tr("System Default"));

    QString appPath = qApp->applicationDirPath();
    QDir qmDir = QDir(appPath + "/ts/");
    QStringList fileNames =
            qmDir.entryList(QStringList("gpg4usb_*.qm"));

    for (int i = 0; i < fileNames.size(); ++i) {
        QString locale = fileNames[i];
        locale.remove(0, locale.indexOf('_') + 1);
        locale.chop(3);

        QTranslator translator;
        translator.load(fileNames[i], qmDir.absolutePath());
        QString language = translator.translate("SettingsDialog",
                                                "English");
        languages.insert(locale, language);
    }
    return languages;
}


MimeTab::MimeTab(QWidget *parent)
    : QWidget(parent)
{
    /*****************************************
     * MIME-Parsing-Box
     *****************************************/
    QGroupBox *mimeQPBox = new QGroupBox(tr("Decode quoted printable"));
    QVBoxLayout  *mimeQPBoxLayout = new QVBoxLayout();
    mimeQPCheckBox = new QCheckBox(tr("Try to recognize quoted printable."), this);
    mimeQPBoxLayout->addWidget(mimeQPCheckBox);
    mimeQPBox->setLayout(mimeQPBoxLayout);


    QGroupBox *mimeParseBox = new QGroupBox(tr("Parse PGP/MIME (Experimental)"));
    QVBoxLayout  *mimeParseBoxLayout = new QVBoxLayout();
    mimeParseCheckBox = new QCheckBox(tr("Try to split attachments from PGP-MIME ecrypted messages."), this);
    mimeParseBoxLayout->addWidget(mimeParseCheckBox);
    mimeParseBox->setLayout(mimeParseBoxLayout);

    QGroupBox *mimeOpenAttachmentBox = new QGroupBox(tr("Open with external application (Experimental)"));
    QVBoxLayout  *mimeOpenAttachmentBoxLayout = new QVBoxLayout();
    QLabel *mimeOpenAttachmentText = new QLabel(tr("Open attachments with default application for the filetype.<br> "
                                                   "There are at least two possible problems with this behaviour:"
                                                   "<ol><li>File needs to be saved unencrypted to attachments folder.<br> "
                                                   "Its your job to clean this folder.</li>"
                                                   "<li>The external application may have its own temp files.</li></ol>"));

    //mimeOpenAttachmentBox->setDisabled(true);
    mimeOpenAttachmentCheckBox = new QCheckBox(tr("Enable opening with external applications."), this);

    mimeOpenAttachmentBoxLayout->addWidget(mimeOpenAttachmentText);
    mimeOpenAttachmentBoxLayout->addWidget(mimeOpenAttachmentCheckBox);
    mimeOpenAttachmentBox->setLayout(mimeOpenAttachmentBoxLayout);

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addWidget(mimeParseBox);
    mainLayout->addWidget(mimeOpenAttachmentBox);
    mainLayout->addWidget(mimeQPBox);
    mainLayout->addStretch(1);
    setLayout(mainLayout);
    setSettings();
}

/**********************************
 * Read the settings from config
 * and set the buttons and checkboxes
 * appropriately
 **********************************/
void MimeTab::setSettings()
{
    QSettings settings;

    // MIME-Parsing
    if (settings.value("mime/parsemime").toBool()) mimeParseCheckBox->setCheckState(Qt::Checked);

    // Qouted Printable
    if (settings.value("mime/parseQP",true).toBool()) mimeQPCheckBox->setCheckState(Qt::Checked);

    // Open Attachments with external app
    if (settings.value("mime/openAttachment").toBool()) mimeOpenAttachmentCheckBox->setCheckState(Qt::Checked);
}


/***********************************
  * get the values of the buttons and
  * write them to settings-file
  *************************************/
void MimeTab::applySettings()
{
    QSettings settings;
    settings.setValue("mime/parsemime" , mimeParseCheckBox->isChecked());
    settings.setValue("mime/parseQP" , mimeQPCheckBox->isChecked());
    settings.setValue("mime/openAttachment" , mimeOpenAttachmentCheckBox->isChecked());

}

AppearanceTab::AppearanceTab(QWidget *parent)
    : QWidget(parent)
{
    /*****************************************
      * Icon-Size-Box
      *****************************************/
    QGroupBox *iconSizeBox = new QGroupBox(tr("Iconsize"));
    iconSizeGroup = new QButtonGroup();
    iconSizeSmall = new QRadioButton(tr("small"));
    iconSizeMedium = new QRadioButton(tr("medium"));
    iconSizeLarge = new QRadioButton(tr("large"));

    iconSizeGroup->addButton(iconSizeSmall, 1);
    iconSizeGroup->addButton(iconSizeMedium, 2);
    iconSizeGroup->addButton(iconSizeLarge, 3);

    QHBoxLayout *iconSizeBoxLayout = new QHBoxLayout();
    iconSizeBoxLayout->addWidget(iconSizeSmall);
    iconSizeBoxLayout->addWidget(iconSizeMedium);
    iconSizeBoxLayout->addWidget(iconSizeLarge);

    iconSizeBox->setLayout(iconSizeBoxLayout);

    /*****************************************
      * Icon-Style-Box
      *****************************************/
    QGroupBox *iconStyleBox = new QGroupBox(tr("Iconstyle"));
    iconStyleGroup = new QButtonGroup();
    iconTextButton = new QRadioButton(tr("just text"));
    iconIconsButton = new QRadioButton(tr("just icons"));
    iconAllButton = new QRadioButton(tr("text and icons"));

    iconStyleGroup->addButton(iconTextButton, 1);
    iconStyleGroup->addButton(iconIconsButton, 2);
    iconStyleGroup->addButton(iconAllButton, 3);

    QHBoxLayout *iconStyleBoxLayout = new QHBoxLayout();
    iconStyleBoxLayout->addWidget(iconTextButton);
    iconStyleBoxLayout->addWidget(iconIconsButton);
    iconStyleBoxLayout->addWidget(iconAllButton);

    iconStyleBox->setLayout(iconStyleBoxLayout);

    /*****************************************
      * Window-Size-Box
      *****************************************/
    QGroupBox *windowSizeBox = new QGroupBox(tr("Windowstate"));
    QHBoxLayout *windowSizeBoxLayout = new QHBoxLayout();
    windowSizeCheckBox = new QCheckBox(tr("Save window size and position on exit."), this);
    windowSizeBoxLayout->addWidget(windowSizeCheckBox);
    windowSizeBox->setLayout(windowSizeBoxLayout);

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addWidget(iconSizeBox);
    mainLayout->addWidget(iconStyleBox);
    mainLayout->addWidget(windowSizeBox);
    mainLayout->addStretch(1);
    setSettings();
    setLayout(mainLayout);
}

/**********************************
 * Read the settings from config
 * and set the buttons and checkboxes
 * appropriately
 **********************************/
void AppearanceTab::setSettings()
{
    QSettings settings;

    //Iconsize
    QSize iconSize = settings.value("toolbar/iconsize", QSize(32, 32)).toSize();
    switch (iconSize.height()) {
    case 12: iconSizeSmall->setChecked(true);
        break;
    case 24:iconSizeMedium->setChecked(true);
        break;
    case 32:iconSizeLarge->setChecked(true);
        break;
    }
    // Iconstyle
    Qt::ToolButtonStyle iconStyle = static_cast<Qt::ToolButtonStyle>(settings.value("toolbar/iconstyle", Qt::ToolButtonTextUnderIcon).toUInt());
    switch (iconStyle) {
    case Qt::ToolButtonTextOnly: iconTextButton->setChecked(true);
        break;
    case Qt::ToolButtonIconOnly:iconIconsButton->setChecked(true);
        break;
    case Qt::ToolButtonTextUnderIcon:iconAllButton->setChecked(true);
        break;
    default:
        break;
    }

    // Window Save and Position
    if (settings.value("window/windowSave").toBool()) windowSizeCheckBox->setCheckState(Qt::Checked);

}

/***********************************
  * get the values of the buttons and
  * write them to settings-file
  *************************************/
void AppearanceTab::applySettings()
{
    QSettings settings;
    switch (iconSizeGroup->checkedId()) {
    case 1: settings.setValue("toolbar/iconsize", QSize(12, 12));
        break;
    case 2:settings.setValue("toolbar/iconsize", QSize(24, 24));
        break;
    case 3:settings.setValue("toolbar/iconsize", QSize(32, 32));
        break;
    }

    switch (iconStyleGroup->checkedId()) {
    case 1: settings.setValue("toolbar/iconstyle", Qt::ToolButtonTextOnly);
        break;
    case 2:settings.setValue("toolbar/iconstyle", Qt::ToolButtonIconOnly);
        break;
    case 3:settings.setValue("toolbar/iconstyle", Qt::ToolButtonTextUnderIcon);
        break;
    }

    settings.setValue("window/windowSave", windowSizeCheckBox->isChecked());
}

KeyserverTab::KeyserverTab(QWidget *parent)
    : QWidget(parent)
{
    QVBoxLayout *mainLayout = new QVBoxLayout(this);

    label = new QLabel(tr("Default Keyserver for import:"));
    comboBox = new QComboBox;
    comboBox->setEditable(true);
    comboBox->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);

    mainLayout->addWidget(label);
    mainLayout->addWidget(comboBox);
    mainLayout->addStretch(1);

    // Read keylist from ini-file and fill it into combobox
    QSettings settings;
    comboBox->addItems(settings.value("keyserver/keyServerList").toStringList());
    setSettings();
}


/**********************************
 * Read the settings from config
 * and set the buttons and checkboxes
 * appropriately
 **********************************/
void KeyserverTab::setSettings()
{
    QSettings settings;
    QString keyserver = settings.value("keyserver/defaultKeyServer").toString();
    comboBox->setCurrentIndex(comboBox->findText(keyserver));
}

/***********************************
  * get the values of the buttons and
  * write them to settings-file
  *************************************/
void KeyserverTab::applySettings()
{
    QSettings settings;
    settings.setValue("keyserver/defaultKeyServer",comboBox->currentText());
}