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#include "vcsplugin.h"

#include "vcsbaseconstants.h"

#include "commonsettingspage.h"
#include "nicknamedialog.h"
#include "vcsoutputwindow.h"
#include "corelistener.h"

#include <coreplugin/iversioncontrol.h>
#include <coreplugin/mimedatabase.h>
#include <coreplugin/vcsmanager.h>

#include <projectexplorer/project.h>
#include <projectexplorer/projectexplorer.h>

#include <utils/macroexpander.h>

#include <QtPlugin>
#include <QDebug>

using namespace Core;
using namespace ProjectExplorer;

namespace VcsBase {
namespace Internal {

VcsPlugin *VcsPlugin::m_instance = 0;

VcsPlugin::VcsPlugin() :
    m_settingsPage(0),
    m_nickNameModel(0),
    m_coreListener(0)
{
    m_instance = this;
}

VcsPlugin::~VcsPlugin()
{
    m_instance = 0;
}

bool VcsPlugin::initialize(const QStringList &arguments, QString *errorMessage)
{
    Q_UNUSED(arguments)

    if (!Core::MimeDatabase::addMimeTypes(QLatin1String(":/vcsbase/VcsBase.mimetypes.xml"), errorMessage))
        return false;

    m_coreListener = new CoreListener;
    addAutoReleasedObject(m_coreListener);

    m_settingsPage = new CommonOptionsPage;
    addAutoReleasedObject(m_settingsPage);
    addAutoReleasedObject(VcsOutputWindow::instance());
    connect(m_settingsPage, SIGNAL(settingsChanged(VcsBase::Internal::CommonVcsSettings)),
            this, SIGNAL(settingsChanged(VcsBase::Internal::CommonVcsSettings)));
    connect(m_settingsPage, SIGNAL(settingsChanged(VcsBase::Internal::CommonVcsSettings)),
            this, SLOT(slotSettingsChanged()));
    slotSettingsChanged();

    Utils::MacroExpander *expander = Utils::globalMacroExpander();
    expander->registerVariable(Constants::VAR_VCS_NAME,
        tr("Name of the version control system in use by the current project."),
        []() -> QString {
            IVersionControl *vc = 0;
            if (Project *project = ProjectExplorerPlugin::currentProject())
                vc = VcsManager::findVersionControlForDirectory(project->projectDirectory().toString());
            return vc ? vc->displayName() : QString();
        });

    expander->registerVariable(Constants::VAR_VCS_TOPIC,
        tr("The current version control topic (branch or tag) identification of the current project."),
        []() -> QString {
            IVersionControl *vc = 0;
            QString topLevel;
            if (Project *project = ProjectExplorerPlugin::currentProject())
                vc = VcsManager::findVersionControlForDirectory(project->projectDirectory().toString(), &topLevel);
            return vc ? vc->vcsTopic(topLevel) : QString();
        });

    expander->registerVariable(Constants::VAR_VCS_TOPLEVELPATH,
        tr("The top level path to the repository the current project is in."),
        []() -> QString {
            if (Project *project = ProjectExplorerPlugin::currentProject())
                return VcsManager::findTopLevelForDirectory(project->projectDirectory().toString());
            return QString();
        });

    return true;
}

void VcsPlugin::extensionsInitialized()
{
}

VcsPlugin *VcsPlugin::instance()
{
    return m_instance;
}

CoreListener *VcsPlugin::coreListener() const
{
    return m_coreListener;
}

CommonVcsSettings VcsPlugin::settings() const
{
    return m_settingsPage->settings();
}

/* Delayed creation/update of the nick name model. */
QStandardItemModel *VcsPlugin::nickNameModel()
{
    if (!m_nickNameModel) {
        m_nickNameModel = NickNameDialog::createModel(this);
        populateNickNameModel();
    }
    return m_nickNameModel;
}

void VcsPlugin::populateNickNameModel()
{
    QString errorMessage;
    if (!NickNameDialog::populateModelFromMailCapFile(settings().nickNameMailMap,
                                                      m_nickNameModel,
                                                      &errorMessage)) {
        qWarning("%s", qPrintable(errorMessage));
    }
}

void VcsPlugin::slotSettingsChanged()
{
    if (m_nickNameModel)
        populateNickNameModel();
}

} // namespace Internal
} // namespace VcsBase