/***************************************************************************
**
** 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)
**
** 
** Non-Open Source Usage  
** 
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** License Agreement, Agreement version 2.2 provided with the Software or,
** alternatively, in accordance with the terms contained in a written
** agreement between you and Nokia.  
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** GNU General Public License Usage 
** 
** 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:
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***************************************************************************/
#include "quickopenplugin.h"
#include "quickopenfiltersfilter.h"
#include "quickopenmanager.h"
#include "quickopentoolwindow.h"
#include "opendocumentsfilter.h"
#include "filesystemfilter.h"
#include "directoryfilter.h"
#include "settingspage.h"

#include <QtCore/qplugin.h>
#include <QtCore/QSettings>
#include <QtCore/QFuture>
#include <QtCore/QFutureWatcher>

#include <coreplugin/baseview.h>
#include <coreplugin/coreconstants.h>
#include <coreplugin/uniqueidmanager.h>
#include <coreplugin/progressmanager/progressmanagerinterface.h>
#include <coreplugin/actionmanager/actionmanager.h>
#include <qtconcurrent/QtConcurrentTools>

using namespace QuickOpen;
using namespace QuickOpen::Internal;

namespace {
    static bool filterLessThan(const IQuickOpenFilter *first, const IQuickOpenFilter *second)
    {
        return first->priority() < second->priority();
    }
}

QuickOpenPlugin::QuickOpenPlugin()
{
    m_refreshTimer.setSingleShot(false);
    connect(&m_refreshTimer, SIGNAL(timeout()), this, SLOT(refresh()));
}

QuickOpenPlugin::~QuickOpenPlugin()
{
    removeObject(m_openDocumentsFilter);
    removeObject(m_fileSystemFilter);
    removeObject(m_settingsPage);
    delete m_openDocumentsFilter;
    delete m_fileSystemFilter;
    delete m_settingsPage;
    foreach (IQuickOpenFilter *filter, m_customFilter)
        delete filter;
}

bool QuickOpenPlugin::initialize(const QStringList &, QString *)
{
    Core::ICore *core = ExtensionSystem::PluginManager::instance()->getObject<Core::ICore>();

    m_settingsPage = new SettingsPage(core, this);
    addObject(m_settingsPage);

    m_quickOpenToolWindow = new QuickOpenToolWindow(this);
    m_quickOpenToolWindow->setEnabled(false);
    Core::BaseView *view = new Core::BaseView("QuickOpen.ToolWindow",
        m_quickOpenToolWindow,
        QList<int>() << core->uniqueIDManager()->uniqueIdentifier(QLatin1String("QuickOpenToolWindow")),
        Core::IView::First);
    addAutoReleasedObject(view);

    const QString actionId = QLatin1String("QtCreator.View.QuickOpen.ToolWindow");
    QAction *action = new QAction(m_quickOpenToolWindow->windowIcon(), m_quickOpenToolWindow->windowTitle(), this);
    Core::ICommand *cmd = core->actionManager()->registerAction(action, actionId, QList<int>() << Core::Constants::C_GLOBAL_ID);
    cmd->setDefaultKeySequence(QKeySequence("Ctrl+K"));
    connect(action, SIGNAL(triggered()), this, SLOT(openQuickOpen()));

    Core::IActionContainer *mtools = core->actionManager()->actionContainer(Core::Constants::M_TOOLS);
    mtools->addAction(cmd);

    addObject(new QuickOpenManager(m_quickOpenToolWindow));

    m_openDocumentsFilter = new OpenDocumentsFilter(core->editorManager());
    addObject(m_openDocumentsFilter);

    m_fileSystemFilter = new FileSystemFilter(core->editorManager(), m_quickOpenToolWindow);
    addObject(m_fileSystemFilter);

    addAutoReleasedObject(new QuickOpenFiltersFilter(this, m_quickOpenToolWindow));

    connect(core, SIGNAL(coreOpened()), this, SLOT(startSettingsLoad()));
    return true;
}

void QuickOpenPlugin::openQuickOpen()
{
    m_quickOpenToolWindow->setFocus();
}

void QuickOpenPlugin::extensionsInitialized()
{
    m_filter = ExtensionSystem::PluginManager::instance()->getObjects<IQuickOpenFilter>();
    qSort(m_filter.begin(), m_filter.end(), filterLessThan);
}

void QuickOpenPlugin::startSettingsLoad()
{
    m_loadWatcher.setFuture(QtConcurrent::run(this, &QuickOpenPlugin::loadSettings));
    connect(&m_loadWatcher, SIGNAL(finished()), this, SLOT(settingsLoaded()));
}

void QuickOpenPlugin::loadSettings()
{
    Core::ICore *core = ExtensionSystem::PluginManager::instance()->getObject<Core::ICore>();
    QSettings settings;
    settings.beginGroup("QuickOpen");
    m_refreshTimer.setInterval(settings.value("RefreshInterval", 60).toInt()*60000);
    foreach (IQuickOpenFilter *filter, m_filter) {
        if (settings.contains(filter->name())) {
            const QByteArray state = settings.value(filter->name()).toByteArray();
            if (!state.isEmpty())
                filter->restoreState(state);
        }
    }
    settings.beginGroup("CustomFilters");
    QList<IQuickOpenFilter *> customFilters;
    foreach (const QString &key, settings.childKeys()) {
        IQuickOpenFilter *filter = new DirectoryFilter(core);
        filter->restoreState(settings.value(key).toByteArray());
        m_filter.append(filter);
        customFilters.append(filter);
    }
    setCustomFilter(customFilters);
    settings.endGroup();
    settings.endGroup();
}

void QuickOpenPlugin::settingsLoaded()
{
    m_quickOpenToolWindow->updateFilterList();
    m_quickOpenToolWindow->setEnabled(true);
    m_refreshTimer.start();
}

void QuickOpenPlugin::saveSettings()
{
    Core::ICore *core = ExtensionSystem::PluginManager::instance()->getObject<Core::ICore>();
    if (core && core->settings()) {
        QSettings *s = core->settings();
        s->beginGroup("QuickOpen");
        s->setValue("Interval", m_refreshTimer.interval()/60000);
        s->remove("");
        foreach (IQuickOpenFilter *filter, m_filter) {
            if (!m_customFilter.contains(filter)) {
                s->setValue(filter->name(), filter->saveState());
            }
        }
        s->beginGroup("CustomFilters");
        int i = 0;
        foreach (IQuickOpenFilter *filter, m_customFilter) {
            s->setValue(QString("directory%1").arg(i), filter->saveState());
            ++i;
        }
        s->endGroup();
        s->endGroup();
    }
}

/*!
    \fn QList<IQuickOpenFilter*> QuickOpenPlugin::filter()

    Return all filters, including the ones created by the user.
*/
QList<IQuickOpenFilter*> QuickOpenPlugin::filter()
{
    return m_filter;
}

/*!
    \fn QList<IQuickOpenFilter*> QuickOpenPlugin::customFilter()

    This returns a subset of all the filters, that contains only the filters that
    have been created by the user at some point (maybe in a previous session).
 */
QList<IQuickOpenFilter*> QuickOpenPlugin::customFilter()
{
    return m_customFilter;
}

void QuickOpenPlugin::setFilter(QList<IQuickOpenFilter*> f)
{
    m_filter = f;
    m_quickOpenToolWindow->updateFilterList();
}

void QuickOpenPlugin::setCustomFilter(QList<IQuickOpenFilter *> filter)
{
    m_customFilter = filter;
}

int QuickOpenPlugin::refreshInterval()
{
    return m_refreshTimer.interval()/60000;
}

void QuickOpenPlugin::setRefreshInterval(int interval)
{
    if (interval < 1) {
        m_refreshTimer.stop();
        m_refreshTimer.setInterval(0);
        return;
    }
    m_refreshTimer.setInterval(interval*60000);
    m_refreshTimer.start();
}

void QuickOpenPlugin::refresh(QList<IQuickOpenFilter*> filters)
{
    if (filters.isEmpty())
        filters = m_filter;
    QFuture<void> task = QtConcurrent::run(&IQuickOpenFilter::refresh, filters);
    Core::FutureProgress *progress = ExtensionSystem::PluginManager::instance()->getObject<Core::ICore>()
            ->progressManager()->addTask(task, tr("Indexing"), Constants::TASK_INDEX, Core::ProgressManagerInterface::CloseOnSuccess);
    connect(progress, SIGNAL(finished()), this, SLOT(saveSettings()));
}

Q_EXPORT_PLUGIN(QuickOpenPlugin)