/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
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** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
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****************************************************************************/

#include "sessiondialog.h"
#include "session.h"

#include <utils/algorithm.h>

#include <QInputDialog>
#include <QValidator>

using namespace ProjectExplorer;
using namespace ProjectExplorer::Internal;

namespace ProjectExplorer {
namespace Internal {

class SessionValidator : public QValidator
{
public:
    SessionValidator(QObject *parent, const QStringList &sessions);
    void fixup(QString & input) const override;
    QValidator::State validate(QString & input, int & pos) const override;
private:
    QStringList m_sessions;
};

SessionValidator::SessionValidator(QObject *parent, const QStringList &sessions)
    : QValidator(parent), m_sessions(sessions)
{
}

QValidator::State SessionValidator::validate(QString &input, int &pos) const
{
    Q_UNUSED(pos)

    if (input.contains(QLatin1Char('/'))
            || input.contains(QLatin1Char(':'))
            || input.contains(QLatin1Char('\\'))
            || input.contains(QLatin1Char('?'))
            || input.contains(QLatin1Char('*')))
        return QValidator::Invalid;

    if (m_sessions.contains(input))
        return QValidator::Intermediate;
    else
        return QValidator::Acceptable;
}

void SessionValidator::fixup(QString &input) const
{
    int i = 2;
    QString copy;
    do {
        copy = input + QLatin1String(" (") + QString::number(i) + QLatin1Char(')');
        ++i;
    } while (m_sessions.contains(copy));
    input = copy;
}

SessionNameInputDialog::SessionNameInputDialog(QWidget *parent)
    : QDialog(parent)
{
    auto hlayout = new QVBoxLayout(this);
    auto label = new QLabel(tr("Enter the name of the session:"), this);
    hlayout->addWidget(label);
    m_newSessionLineEdit = new QLineEdit(this);
    m_newSessionLineEdit->setValidator(new SessionValidator(this, SessionManager::sessions()));
    hlayout->addWidget(m_newSessionLineEdit);
    auto buttons = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel, Qt::Horizontal, this);
    m_okButton = buttons->button(QDialogButtonBox::Ok);
    m_switchToButton = new QPushButton;
    buttons->addButton(m_switchToButton, QDialogButtonBox::AcceptRole);
    connect(m_switchToButton, &QPushButton::clicked, [this]() {
        m_usedSwitchTo = true;
    });
    connect(buttons, &QDialogButtonBox::accepted, this, &QDialog::accept);
    connect(buttons, &QDialogButtonBox::rejected, this, &QDialog::reject);
    hlayout->addWidget(buttons);
    setLayout(hlayout);
}

void SessionNameInputDialog::setActionText(const QString &actionText, const QString &openActionText)
{
    m_okButton->setText(actionText);
    m_switchToButton->setText(openActionText);
}

void SessionNameInputDialog::setValue(const QString &value)
{
    m_newSessionLineEdit->setText(value);
}

QString SessionNameInputDialog::value() const
{
    return m_newSessionLineEdit->text();
}

bool SessionNameInputDialog::isSwitchToRequested() const
{
    return m_usedSwitchTo;
}

SessionDialog::SessionDialog(QWidget *parent) : QDialog(parent)
{
    m_ui.setupUi(this);
    m_ui.sessionView->setActivationMode(Utils::DoubleClickActivation);

    connect(m_ui.btCreateNew, &QAbstractButton::clicked,
        m_ui.sessionView, &SessionView::createNewSession);
    connect(m_ui.btClone, &QAbstractButton::clicked,
        m_ui.sessionView, &SessionView::cloneCurrentSession);
    connect(m_ui.btDelete, &QAbstractButton::clicked,
        m_ui.sessionView, &SessionView::deleteSelectedSessions);
    connect(m_ui.btSwitch, &QAbstractButton::clicked,
        m_ui.sessionView, &SessionView::switchToCurrentSession);
    connect(m_ui.btRename, &QAbstractButton::clicked,
        m_ui.sessionView, &SessionView::renameCurrentSession);
    connect(m_ui.sessionView, &SessionView::activated,
        m_ui.sessionView, &SessionView::switchToCurrentSession);

    connect(m_ui.sessionView, &SessionView::selected,
        this, &SessionDialog::updateActions);
    connect(m_ui.sessionView, &SessionView::sessionSwitched,
        this, &QDialog::reject);

    m_ui.whatsASessionLabel->setOpenExternalLinks(true);
}

void SessionDialog::setAutoLoadSession(bool check)
{
    m_ui.autoLoadCheckBox->setChecked(check);
}

bool SessionDialog::autoLoadSession() const
{
    return m_ui.autoLoadCheckBox->checkState() == Qt::Checked;
}

void SessionDialog::updateActions(const QStringList &sessions)
{
    if (sessions.isEmpty()) {
        m_ui.btDelete->setEnabled(false);
        m_ui.btRename->setEnabled(false);
        m_ui.btClone->setEnabled(false);
        m_ui.btSwitch->setEnabled(false);
        return;
    }
    const bool defaultIsSelected = sessions.contains("default");
    const bool activeIsSelected = Utils::anyOf(sessions, [](const QString &session) {
        return session == SessionManager::activeSession();
    });
    m_ui.btDelete->setEnabled(!defaultIsSelected && !activeIsSelected);
    m_ui.btRename->setEnabled(sessions.size() == 1 && !defaultIsSelected);
    m_ui.btClone->setEnabled(sessions.size() == 1);
    m_ui.btSwitch->setEnabled(sessions.size() == 1);
}

} // namespace Internal
} // namespace ProjectExplorer