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/***************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact:  Qt Software Information (qt-info@nokia.com)
**
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**
** Non-Open Source Usage
**
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** Licensees may use this file in accordance with the Qt Beta Version
** License Agreement, Agreement version 2.2 provided with the Software or,
** alternatively, in accordance with the terms contained in a written
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** agreement between you and Nokia.
**
** GNU General Public License Usage
**
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** Alternatively, this file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the packaging
** of this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
**
** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
** http://www.gnu.org/copyleft/gpl.html.
**
** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt GPL Exception
** version 1.2, included in the file GPL_EXCEPTION.txt in this package.
**
***************************************************************************/
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#include "formwindowfile.h"
#include "designerconstants.h"

#include <coreplugin/icore.h>
#include <utils/reloadpromptutils.h>

#include <QtDesigner/QDesignerFormWindowInterface>
#include <QtDesigner/QDesignerFormEditorInterface>

#include <QtGui/QMessageBox>
#include <QtGui/QMainWindow>

#include <QtCore/QFile>
#include <QtCore/QFileInfo>
#include <QtCore/QDir>
#include <QtCore/QByteArray>
#include <QtCore/QDebug>

using namespace Designer::Internal;
using namespace Designer::Constants;
using namespace SharedTools;

enum { debugFormWindowFile = 0 };


FormWindowFile::FormWindowFile(Core::ICore *core,
                               QDesignerFormWindowInterface *form,
                               QObject *parent) :
    Core::IFile(parent),
    m_mimeType(QLatin1String(FORM_MIMETYPE)),
    m_formWindow(form),
    m_core(core)
{
}

FormWindowFile::~FormWindowFile()
{
}

bool FormWindowFile::save(const QString &name /*= QString()*/)
{
    const QString actualName = name.isEmpty() ? fileName() : name;

    if (debugFormWindowFile)
        qDebug() << "FormWindowFile::save" << name << "->" << actualName;

    if (actualName.isEmpty())
        return false;

    const QFileInfo fi(actualName);
    const QString oldFormName = m_formWindow->fileName();
    const QString formName = fi.absoluteFilePath();
    m_formWindow->setFileName(formName);

    QString errorString;
    if (!writeFile(actualName, errorString)) {
        QMessageBox::critical(0, tr("Error saving %1").arg(formName), errorString);
        m_formWindow->setFileName(oldFormName);
        return false;
    }

    m_fileName = fi.absoluteFilePath();
    emit setDisplayName(fi.fileName());
    m_formWindow->setDirty(false);
    emit changed();

    return true;
}

QString FormWindowFile::fileName() const
{
    return m_fileName;
}

bool FormWindowFile::isModified() const
{
    return m_formWindow->isDirty();
}

bool FormWindowFile::isReadOnly() const
{
    if (m_fileName.isEmpty())
        return false;
    const QFileInfo fi(m_fileName);
    return !fi.isWritable();
}

bool FormWindowFile::isSaveAsAllowed() const
{
    return true;
}

void FormWindowFile::modified(Core::IFile::ReloadBehavior *behavior)
{
    if (debugFormWindowFile)
        qDebug() << "FormWindowFile::modified" << m_fileName << *behavior;

    switch (*behavior) {
    case  Core::IFile::ReloadNone:
        return;
    case Core::IFile::ReloadAll:
        emit reload(m_fileName);
        return;
    case Core::IFile::ReloadPermissions:
        emit changed();
        return;
    case Core::IFile::AskForReload:
        break;
    }

    switch (Core::Utils::reloadPrompt(m_fileName, m_core->mainWindow())) {
    case Core::Utils::ReloadCurrent:
        emit reload(m_fileName);
        break;
    case Core::Utils::ReloadAll:
        emit reload(m_fileName);
        *behavior = Core::IFile::ReloadAll;
        break;
    case Core::Utils::ReloadSkipCurrent:
        break;
    case Core::Utils::ReloadNone:
        *behavior = Core::IFile::ReloadNone;
        break;
    }
}

QString FormWindowFile::defaultPath() const
{
    return QString();
}

void FormWindowFile::setSuggestedFileName(const QString &fileName)
{
    if (debugFormWindowFile)
        qDebug() << "FormWindowFile:setSuggestedFileName" << m_fileName << fileName;

    m_suggestedName = fileName;
}

QString FormWindowFile::suggestedFileName() const
{
    return m_suggestedName;
}

QString FormWindowFile::mimeType() const
{
    return m_mimeType;
}

bool FormWindowFile::writeFile(const QString &fileName, QString &errorString) const
{
    if (debugFormWindowFile)
        qDebug() << "FormWindowFile::writeFile" << m_fileName << fileName;

    QFile file(fileName);
    if (!file.open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Truncate)) {
        errorString = tr("Unable to open %1: %2").arg(fileName, file.errorString());
        return false;
    }
    const bool rc = writeFile(file, errorString);
    file.close();
    return rc;
}

bool FormWindowFile::writeFile(QFile &file, QString &errorString) const
{
    const QByteArray content = m_formWindow->contents().toUtf8();
    if (!file.write(content)) {
        errorString = tr("Unable to write to %1: %2").arg(file.fileName(), file.errorString());
        return false;
    }
    return true;
}

void FormWindowFile::setFileName(const QString &fname)
{
    m_fileName = fname;
}