#include "AppSettings.h"

#include <QCoreApplication>
#include <QDir>
#include <QResource>
#include <QSettings>
#include <QTextCodec>
#include <QTranslator>

///////////////////////////////////////////////////////////////////////////////
Settings::Settings(bool portableMode) : store(0)
{
    Mappings.insert(FOSSIL_SETTING_GDIFF_CMD, Setting("", Setting::TYPE_FOSSIL_GLOBAL));
    Mappings.insert(FOSSIL_SETTING_GMERGE_CMD, Setting("", Setting::TYPE_FOSSIL_GLOBAL));
    Mappings.insert(FOSSIL_SETTING_PROXY_URL, Setting("", Setting::TYPE_FOSSIL_GLOBAL));
    Mappings.insert(FOSSIL_SETTING_HTTP_PORT, Setting("", Setting::TYPE_FOSSIL_GLOBAL));

    Mappings.insert(FOSSIL_SETTING_IGNORE_GLOB, Setting("", Setting::TYPE_FOSSIL_LOCAL));
    Mappings.insert(FOSSIL_SETTING_CRNL_GLOB, Setting("", Setting::TYPE_FOSSIL_LOCAL));

    // Go into portable mode when explicitly requested or if a config file exists next to the executable
    QString ini_path = QDir::toNativeSeparators(QCoreApplication::applicationDirPath() + QDir::separator() + QCoreApplication::applicationName() + ".ini");
    if (portableMode || QFile::exists(ini_path))
        store = new QSettings(ini_path, QSettings::IniFormat);
    else
    {
        // Linux: ~/.config/organizationName/applicationName.conf
        // Windows: HKEY_CURRENT_USER\Software\organizationName\Fuel
        store = new QSettings(QSettings::UserScope, QCoreApplication::organizationName(), QCoreApplication::applicationName());
    }
    Q_ASSERT(store);

    if (!HasValue(FUEL_SETTING_FILE_DBLCLICK))
        SetValue(FUEL_SETTING_FILE_DBLCLICK, 0);
    if (!HasValue(FUEL_SETTING_LANGUAGE) && SupportsLang(QLocale::system().name()))
        SetValue(FUEL_SETTING_LANGUAGE, QLocale::system().name());
    if (!HasValue(FUEL_SETTING_WEB_BROWSER))
        SetValue(FUEL_SETTING_WEB_BROWSER, 0);

    for (int i = 0; i < MAX_CUSTOM_ACTIONS; ++i)
    {
        CustomAction action;
        action.Id = QObject::tr("Custom Action %0").arg(i + 1);
        customActions.append(action);
    }

    ApplyEnvironment();
}

//-----------------------------------------------------------------------------
Settings::~Settings()
{
    Q_ASSERT(store);
    delete store;
}

//-----------------------------------------------------------------------------
void Settings::ApplyEnvironment()
{
    QString lang_id = GetValue(FUEL_SETTING_LANGUAGE).toString();
#if (QT_VERSION < QT_VERSION_CHECK(5, 0, 0))
    QTextCodec::setCodecForTr(QTextCodec::codecForName("utf8"));
#endif
    if (!InstallLang(lang_id))
        SetValue(FUEL_SETTING_LANGUAGE, "en_US");
}

//-----------------------------------------------------------------------------
bool Settings::InstallLang(const QString &langId)
{
    if (langId == "en_US")
    {
        QCoreApplication::instance()->removeTranslator(&translator);
        return true;
    }

    QString locale_path = QString(":intl/%0.qm").arg(langId);
    if (!translator.load(locale_path))
        return false;

    Q_ASSERT(!translator.isEmpty());
    QCoreApplication::instance()->installTranslator(&translator);

    return true;
}

//-----------------------------------------------------------------------------
bool Settings::HasValue(const QString &name) const
{
    return store->contains(name);
}

//-----------------------------------------------------------------------------
const QVariant Settings::GetValue(const QString &name)
{
    if (!HasValue(name))
        return QVariant();
    return store->value(name);
}

//-----------------------------------------------------------------------------
void Settings::SetValue(const QString &name, const QVariant &value)
{
    store->setValue(name, value);
}

//-----------------------------------------------------------------------------
QVariant &Settings::GetFossilValue(const QString &name)
{
    mappings_t::iterator it = Mappings.find(name);
    Q_ASSERT(it != Mappings.end());
    return it.value().Value;
}

//-----------------------------------------------------------------------------
void Settings::SetFossilValue(const QString &name, const QVariant &value)
{
    mappings_t::iterator it = Mappings.find(name);
    Q_ASSERT(it != Mappings.end());
    it->Value = value;
}

//-----------------------------------------------------------------------------
bool Settings::SupportsLang(const QString &langId) const
{
    QString locale_path = QString(":intl/%0.qm").arg(langId);
    QResource res(locale_path);
    return res.isValid();
}