/* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik
 * Software engineering by Intevation GmbH
 *
 * This file is Free Software under the GNU GPL (v>=2)
 * and comes with ABSOLUTELY NO WARRANTY!
 * See LICENSE.txt for details.
 */

#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QLabel>
#include <QLineEdit>
#include <QSettings>
#include <QPushButton>
#include <QUrl>
#include <QDebug>
#include <QIcon>
#include <QPixmap>
#include <QCheckBox>

#include "proxysettingsdlg.h"

ProxySettingsDlg::ProxySettingsDlg(QWidget *parent) :
    QDialog (parent) {
    setWindowIcon(QIcon(":/img/preferences-network_16.png"));
    setWindowTitle(tr("Proxy server settings"));
    QVBoxLayout *mainLayout = new QVBoxLayout();
    QHBoxLayout *iconTextLayout = new QHBoxLayout();
    QHBoxLayout *labelLineLayout = new QHBoxLayout();
    QHBoxLayout *okCancelLayout = new QHBoxLayout();

    QSettings settings;

    QLabel *iconLabel = new QLabel();
    iconLabel->setPixmap(QPixmap(":/img/preferences-network_64.png"));
    iconTextLayout->addWidget(iconLabel);

    QLabel *explanation = new QLabel(tr("Please enter the proxy server to use in the field below.") +
        " " + tr("The URL can follow the scheme:") + "<br/>" + 
        tr("[&lt;username&gt;:&lt;password&gt;@]&lt;hostname&gt;[:&lt;port&gt;]") +
        "<br/></br/>");
    explanation->setTextFormat(Qt::RichText);
    explanation->setWordWrap(true);

    iconTextLayout->addWidget(explanation);
    mainLayout->addLayout(iconTextLayout);

    bool useProxy = settings.value("UseProxy", false).toBool();
    mCheckBox = new QCheckBox(tr("Use Proxy Server"));
    mCheckBox->setTristate(false);
    mCheckBox->setCheckState(useProxy ? Qt::Checked : Qt::Unchecked);

    mainLayout->addWidget(mCheckBox);

    mProxyURL = new QLineEdit(settings.value("ProxyURL").toString());
    QLabel *proxyLabel = new QLabel(tr("Proxy Server:"));
    proxyLabel->setBuddy(mProxyURL);
    mProxyURL->setReadOnly(!useProxy);
    mProxyURL->setEnabled(useProxy);

    labelLineLayout->addWidget(proxyLabel);
    labelLineLayout->addWidget(mProxyURL);

    mSaveButton = new QPushButton (tr("&Save"));
    QPushButton * cancelButton = new QPushButton (tr("&Cancel"));
    okCancelLayout->addStretch(10);
    okCancelLayout->addWidget(mSaveButton);
    okCancelLayout->addWidget(cancelButton);

    connect(cancelButton, SIGNAL(clicked()), this, SLOT(reject()));
    connect(mSaveButton, SIGNAL(clicked()), this, SLOT(save()));
    connect(mProxyURL, SIGNAL(textChanged(const QString &)),
            this, SLOT(checkCanSave(const QString&)));
    connect(mCheckBox, SIGNAL(stateChanged(int)), this, SLOT(checkCanEdit(int)));

    mainLayout->addLayout(labelLineLayout);
    mainLayout->addLayout(okCancelLayout);

    setLayout(mainLayout);
}

void ProxySettingsDlg::checkCanSave(const QString &val) {
    mSaveButton->setEnabled(mCheckBox->checkState() == Qt::Unchecked ||
        QUrl(val).isValid());
}

void ProxySettingsDlg::checkCanEdit(int state) {
    mProxyURL->setReadOnly(state != Qt::Checked);
    mProxyURL->setEnabled(state == Qt::Checked);
}

void ProxySettingsDlg::save() {
    QSettings settings;
    settings.setValue("ProxyURL", mProxyURL->text());
    settings.setValue("UseProxy", mCheckBox->checkState() == Qt::Checked);
    settings.sync();
    accept();
}