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**
** Copyright (C) 2015 The Qt Company Ltd.
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**
** This file is part of Qt Creator.
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** LICENSE.LGPLv3 included in the packaging of this file.  Please review the
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****************************************************************************/

#include "qtkitinformation.h"

#include "qtkitconfigwidget.h"
#include "qtsupportconstants.h"
#include "qtversionmanager.h"
#include "qtparser.h"

#include <utils/algorithm.h>
#include <utils/buildablehelperlibrary.h>
#include <utils/macroexpander.h>
#include <utils/qtcassert.h>

using namespace ProjectExplorer;
using namespace Utils;

namespace QtSupport {

QtKitInformation::QtKitInformation()
{
    setObjectName(QLatin1String("QtKitInformation"));
    setId(QtKitInformation::id());
    setPriority(26000);

    connect(ProjectExplorer::KitManager::instance(), SIGNAL(kitsLoaded()),
            this, SLOT(kitsWereLoaded()));
}

QVariant QtKitInformation::defaultValue(ProjectExplorer::Kit *k) const
{
    Q_UNUSED(k);

    // find "Qt in PATH":
    QList<BaseQtVersion *> versionList = QtVersionManager::versions();
    BaseQtVersion *result = findOrDefault(versionList, [](const BaseQtVersion *v) {
        return v->autodetectionSource() == QLatin1String("PATH");
    });

    if (result)
        return result->uniqueId();

    // Legacy: Check for system qmake path: Remove in 3.5 (or later):
    // This check is expensive as it will potentially run binaries (qmake --version)!
    const FileName qmakePath
            = BuildableHelperLibrary::findSystemQt(Utils::Environment::systemEnvironment());

    if (!qmakePath.isEmpty()) {
        result = findOrDefault(versionList, [qmakePath](const BaseQtVersion *v) {
            return v->qmakeCommand() == qmakePath;
        });
        if (result)
            return result->uniqueId();
    }

    // Use *any* desktop Qt:
    result = findOrDefault(versionList, [](const BaseQtVersion *v) {
        return v->type() == QLatin1String(QtSupport::Constants::DESKTOPQT);
    });
    return result ? result->uniqueId() : -1;
}

QList<ProjectExplorer::Task> QtKitInformation::validate(const ProjectExplorer::Kit *k) const
{
    QList<ProjectExplorer::Task> result;
    QTC_ASSERT(QtVersionManager::isLoaded(), return result);
    BaseQtVersion *version = qtVersion(k);
    if (!version)
        return result;
    return version->validateKit(k);
}

void QtKitInformation::fix(ProjectExplorer::Kit *k)
{
    QTC_ASSERT(QtVersionManager::isLoaded(), return);
    BaseQtVersion *version = qtVersion(k);
    if (!version && qtVersionId(k) >= 0) {
        qWarning("Qt version is no longer known, removing from kit \"%s\".", qPrintable(k->displayName()));
        setQtVersionId(k, -1);
    }
}

ProjectExplorer::KitConfigWidget *QtKitInformation::createConfigWidget(ProjectExplorer::Kit *k) const
{
    return new Internal::QtKitConfigWidget(k, this);
}

QString QtKitInformation::displayNamePostfix(const ProjectExplorer::Kit *k) const
{
    BaseQtVersion *version = qtVersion(k);
    return version ? version->displayName() : QString();
}

ProjectExplorer::KitInformation::ItemList
QtKitInformation::toUserOutput(const ProjectExplorer::Kit *k) const
{
    BaseQtVersion *version = qtVersion(k);
    return ItemList() << qMakePair(tr("Qt version"), version ? version->displayName() : tr("None"));
}

void QtKitInformation::addToEnvironment(const ProjectExplorer::Kit *k, Utils::Environment &env) const
{
    BaseQtVersion *version = qtVersion(k);
    if (version)
        version->addToEnvironment(k, env);
}

ProjectExplorer::IOutputParser *QtKitInformation::createOutputParser(const ProjectExplorer::Kit *k) const
{
    if (qtVersion(k))
        return new QtParser;
    return 0;
}

void QtKitInformation::addToMacroExpander(Kit *kit, MacroExpander *expander) const
{
    expander->registerSubProvider(
                [this, kit]() -> MacroExpander * {
                    BaseQtVersion *version = qtVersion(kit);
                    return version ? version->macroExpander() : 0;
                });

    expander->registerVariable("Qt:Name", tr("Name of Qt Version"),
                [this, kit]() -> QString {
                   BaseQtVersion *version = qtVersion(kit);
                   return version ? version->displayName() : tr("unknown");
                });
}

Core::Id QtKitInformation::id()
{
    return "QtSupport.QtInformation";
}

int QtKitInformation::qtVersionId(const ProjectExplorer::Kit *k)
{
    if (!k)
        return -1;

    int id = -1;
    QVariant data = k->value(QtKitInformation::id(), -1);
    if (data.type() == QVariant::Int) {
        bool ok;
        id = data.toInt(&ok);
        if (!ok)
            id = -1;
    } else {
        QString source = data.toString();
        foreach (BaseQtVersion *v, QtVersionManager::versions()) {
            if (v->autodetectionSource() != source)
                continue;
            id = v->uniqueId();
            break;
        }
    }
    return id;
}

void QtKitInformation::setQtVersionId(ProjectExplorer::Kit *k, const int id)
{
    k->setValue(QtKitInformation::id(), id);
}

BaseQtVersion *QtKitInformation::qtVersion(const ProjectExplorer::Kit *k)
{
    return QtVersionManager::version(qtVersionId(k));
}

void QtKitInformation::setQtVersion(ProjectExplorer::Kit *k, const BaseQtVersion *v)
{
    if (!v)
        setQtVersionId(k, -1);
    else
        setQtVersionId(k, v->uniqueId());
}

void QtKitInformation::qtVersionsChanged(const QList<int> &addedIds,
                                         const QList<int> &removedIds,
                                         const QList<int> &changedIds)
{
    Q_UNUSED(addedIds);
    Q_UNUSED(removedIds);
    foreach (ProjectExplorer::Kit *k, ProjectExplorer::KitManager::kits()) {
        if (changedIds.contains(qtVersionId(k))) {
            k->validate(); // Qt version may have become (in)valid
            notifyAboutUpdate(k);
        }
    }
}

void QtKitInformation::kitsWereLoaded()
{
    foreach (ProjectExplorer::Kit *k, ProjectExplorer::KitManager::kits())
        fix(k);

    connect(QtVersionManager::instance(), SIGNAL(qtVersionsChanged(QList<int>,QList<int>,QList<int>)),
            this, SLOT(qtVersionsChanged(QList<int>,QList<int>,QList<int>)));
}

KitMatcher QtKitInformation::platformMatcher(const QString &platform)
{
    return std::function<bool(const Kit *)>([platform](const Kit *kit) -> bool {
        BaseQtVersion *version = QtKitInformation::qtVersion(kit);
        return version && version->platformName() == platform;
    });
}

KitMatcher QtKitInformation::qtVersionMatcher(const Core::FeatureSet &required,
    const QtVersionNumber &min, const QtVersionNumber &max)
{
    return std::function<bool(const Kit *)>([required, min, max](const Kit *kit) -> bool {
        BaseQtVersion *version = QtKitInformation::qtVersion(kit);
        if (!version)
            return false;
        QtVersionNumber current = version->qtVersion();
        if (min.majorVersion > -1 && current < min)
            return false;
        if (max.majorVersion > -1 && current > max)
            return false;
        return version->availableFeatures().contains(required);
    });
}

QSet<QString> QtKitInformation::availablePlatforms(const Kit *k) const
{
    QSet<QString> result;
    BaseQtVersion *version = QtKitInformation::qtVersion(k);
    if (version) {
        QString platform = version->platformName();
        if (!platform.isEmpty())
            result.insert(version->platformName());
    }
    return result;
}

QString QtKitInformation::displayNameForPlatform(const Kit *k, const QString &platform) const
{
    BaseQtVersion *version = QtKitInformation::qtVersion(k);
    if (version && version->platformName() == platform)
        return version->platformDisplayName();
    return QString();
}

Core::FeatureSet QtKitInformation::availableFeatures(const Kit *k) const
{
    BaseQtVersion *version = QtKitInformation::qtVersion(k);
    return version ? version->availableFeatures() : Core::FeatureSet();
}

} // namespace QtSupport
