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#ifndef QBS_HOSTOSINFO_H
#define QBS_HOSTOSINFO_H

#include "qbs_export.h"

#include <QtGlobal>
#include <QMap>
#include <QString>
#include <QStringList>

#if defined(Q_OS_WIN)
#define QTC_HOST_EXE_SUFFIX ".exe"
#define QTC_HOST_DYNAMICLIB_PREFIX ""
#define QTC_HOST_DYNAMICLIB_SUFFIX ".dll"
#define QTC_HOST_OBJECT_SUFFIX ".obj"
#elif defined(Q_OS_DARWIN)
#define QTC_HOST_EXE_SUFFIX ""
#define QTC_HOST_DYNAMICLIB_PREFIX "lib"
#define QTC_HOST_DYNAMICLIB_SUFFIX ".dylib"
#define QTC_HOST_OBJECT_SUFFIX ".o"
#else
#define QTC_HOST_EXE_SUFFIX ""
#define QTC_HOST_DYNAMICLIB_PREFIX "lib"
#define QTC_HOST_DYNAMICLIB_SUFFIX ".so"
#define QTC_HOST_OBJECT_SUFFIX ".o"
#endif // Q_OS_WIN

namespace qbs {
namespace Internal {

class QBS_EXPORT HostOsInfo // Exported for use by command-line tools.
{
public:
    // Add more as needed.
    enum HostOs { HostOsWindows, HostOsLinux, HostOsOsx, HostOsOtherUnix, HostOsOther };

    static inline HostOs hostOs();

    static bool isWindowsHost() { return hostOs() == HostOsWindows; }
    static bool isLinuxHost() { return hostOs() == HostOsLinux; }
    static bool isOsxHost() { return hostOs() == HostOsOsx; }
    static inline bool isAnyUnixHost();
    static inline QString canonicalArchitecture(const QString &architecture);
    static inline QString defaultEndianness(const QString &architecture);

    static QString appendExecutableSuffix(const QString &executable)
    {
        QString finalName = executable;
        if (isWindowsHost())
            finalName += QLatin1String(QTC_HOST_EXE_SUFFIX);
        return finalName;
    }

    static QString dynamicLibraryName(const QString &libraryBaseName)
    {
        return QLatin1String(QTC_HOST_DYNAMICLIB_PREFIX) + libraryBaseName
                + QLatin1String(QTC_HOST_DYNAMICLIB_SUFFIX);
    }

    static QString objectName(const QString &baseName)
    {
        return baseName + QLatin1String(QTC_HOST_OBJECT_SUFFIX);
    }

    static Qt::CaseSensitivity fileNameCaseSensitivity()
    {
        return isWindowsHost() ? Qt::CaseInsensitive: Qt::CaseSensitive;
    }

    static QChar pathListSeparator()
    {
        return isWindowsHost() ? QLatin1Char(';') : QLatin1Char(':');
    }

    static Qt::KeyboardModifier controlModifier()
    {
        return isOsxHost() ? Qt::MetaModifier : Qt::ControlModifier;
    }
};

HostOsInfo::HostOs HostOsInfo::hostOs()
{
#if defined(Q_OS_WIN)
    return HostOsWindows;
#elif defined(Q_OS_LINUX)
    return HostOsLinux;
#elif defined(Q_OS_DARWIN)
    return HostOsOsx;
#elif defined(Q_OS_UNIX)
    return HostOsOtherUnix;
#else
    return HostOsOther;
#endif
}

bool HostOsInfo::isAnyUnixHost()
{
#ifdef Q_OS_UNIX
    return true;
#else
    return false;
#endif
}

QString HostOsInfo::canonicalArchitecture(const QString &architecture)
{
    QMap<QString, QStringList> archMap;
    archMap.insert(QLatin1String("x86"), QStringList()
        << QLatin1String("i386")
        << QLatin1String("i486")
        << QLatin1String("i586")
        << QLatin1String("i686")
        << QLatin1String("ia32")
        << QLatin1String("ia-32")
        << QLatin1String("x86_32")
        << QLatin1String("x86-32")
        << QLatin1String("intel32")
        << QLatin1String("mingw32"));

    archMap.insert(QLatin1String("x86_64"), QStringList()
        << QLatin1String("x86-64")
        << QLatin1String("x64")
        << QLatin1String("amd64")
        << QLatin1String("ia32e")
        << QLatin1String("em64t")
        << QLatin1String("intel64")
        << QLatin1String("mingw64"));

    archMap.insert(QLatin1String("ia64"), QStringList()
        << QLatin1String("ia-64")
        << QLatin1String("itanium"));

    archMap.insert(QLatin1String("ppc"), QStringList()
        << QLatin1String("powerpc"));

    archMap.insert(QLatin1String("ppc64"), QStringList()
        << QLatin1String("powerpc64"));

    QMapIterator<QString, QStringList> i(archMap);
    while (i.hasNext()) {
        i.next();
        if (i.value().contains(architecture.toLower()))
            return i.key();
    }

    return architecture;
}

QString HostOsInfo::defaultEndianness(const QString &architecture)
{
    const QString canonicalArch = canonicalArchitecture(architecture);

    QStringList little = QStringList()
            << QLatin1String("x86")
            << QLatin1String("x86_64")
            << QLatin1String("arm")
            << QLatin1String("arm64");

    if (little.contains(canonicalArch))
        return QLatin1String("little");

    QStringList big = QStringList()
            << QLatin1String("ppc")
            << QLatin1String("ppc64");

    if (big.contains(canonicalArch))
        return QLatin1String("big");

    return QString();
}

} // namespace Internal
} // namespace qbs

#endif // QBS_HOSTOSINFO_H