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**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
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** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
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#pragma once

#include "projectexplorer_export.h"

#include "abi.h"
#include "headerpath.h"
#include "projectmacro.h"
#include "task.h"
#include "toolchaincache.h"

#include <coreplugin/id.h>

#include <utils/cpplanguage_details.h>
#include <utils/environment.h>
#include <utils/fileutils.h>

#include <QObject>
#include <QSet>
#include <QStringList>
#include <QVariantMap>

#include <functional>
#include <memory>

namespace ProjectExplorer {

namespace Internal { class ToolChainPrivate; }

namespace Deprecated {
// Deprecated in 4.3:
namespace Toolchain {
enum Language {
    None = 0,
    C,
    Cxx
};
QString languageId(Language l);
} // namespace Toolchain
} // namespace Deprecated

class Abi;
class IOutputParser;
class ToolChainConfigWidget;
class ToolChainFactory;
class Kit;

namespace Internal { class ToolChainSettingsAccessor; }

class PROJECTEXPLORER_EXPORT ToolChainDescription
{
public:
    Utils::FilePath compilerPath;
    Core::Id language;
};

// --------------------------------------------------------------------------
// ToolChain (documentation inside)
// --------------------------------------------------------------------------

class PROJECTEXPLORER_EXPORT ToolChain
{
public:
    enum Detection {
        ManualDetection,
        AutoDetection,
        AutoDetectionFromSdk,
        UninitializedDetection,
    };

    using Predicate = std::function<bool(const ToolChain *)>;

    virtual ~ToolChain();

    QString displayName() const;
    void setDisplayName(const QString &name);

    inline bool isAutoDetected() const { return detection() != ManualDetection; }
    Detection detection() const;

    QByteArray id() const;

    virtual QStringList suggestedMkspecList() const;

    Core::Id typeId() const;
    QString typeDisplayName() const;

    virtual Abi targetAbi() const = 0;

    virtual ProjectExplorer::Abis supportedAbis() const;
    virtual QString originalTargetTriple() const { return QString(); }
    virtual QStringList extraCodeModelFlags() const { return QStringList(); }
    virtual Utils::FilePath installDir() const { return Utils::FilePath(); }

    virtual bool isValid() const = 0;

    virtual Utils::LanguageExtensions languageExtensions(const QStringList &cxxflags) const = 0;
    virtual Utils::WarningFlags warningFlags(const QStringList &cflags) const = 0;
    virtual QString sysRoot() const;

    class MacroInspectionReport
    {
    public:
        Macros macros;
        Utils::LanguageVersion languageVersion;
    };

    using MacrosCache = std::shared_ptr<Cache<QStringList, ToolChain::MacroInspectionReport, 64>>;
    using HeaderPathsCache = std::shared_ptr<Cache<QPair<Utils::Environment, QStringList>, HeaderPaths>>;

    // A MacroInspectionRunner is created in the ui thread and runs in another thread.
    using MacroInspectionRunner = std::function<MacroInspectionReport(const QStringList &cxxflags)>;
    virtual MacroInspectionRunner createMacroInspectionRunner() const = 0;
    virtual Macros predefinedMacros(const QStringList &cxxflags) const = 0;

    // A BuiltInHeaderPathsRunner is created in the ui thread and runs in another thread.
    using BuiltInHeaderPathsRunner = std::function<HeaderPaths(
        const QStringList &cxxflags, const QString &sysRoot, const QString &originalTargetTriple)>;
    virtual BuiltInHeaderPathsRunner createBuiltInHeaderPathsRunner(const Utils::Environment &env) const = 0;
    virtual HeaderPaths builtInHeaderPaths(const QStringList &cxxflags,
                                           const Utils::FilePath &sysRoot,
                                           const Utils::Environment &env) const = 0;
    virtual void addToEnvironment(Utils::Environment &env) const = 0;
    virtual Utils::FilePath makeCommand(const Utils::Environment &env) const = 0;

    Core::Id language() const;

    virtual Utils::FilePath compilerCommand() const = 0;
    virtual IOutputParser *outputParser() const = 0;

    virtual bool operator ==(const ToolChain &) const;

    virtual std::unique_ptr<ToolChainConfigWidget> createConfigurationWidget() = 0;
    ToolChain *clone() const;

    // Used by the toolchainmanager to save user-generated tool chains.
    // Make sure to call this function when deriving!
    virtual QVariantMap toMap() const;
    virtual Tasks validateKit(const Kit *k) const;

    virtual bool isJobCountSupported() const { return true; }

    void setLanguage(Core::Id language);
    void setDetection(Detection d);

    static Utils::LanguageVersion cxxLanguageVersion(const QByteArray &cplusplusMacroValue);
    static Utils::LanguageVersion languageVersion(const Core::Id &language, const Macros &macros);

protected:
    explicit ToolChain(Core::Id typeId);

    void setTypeDisplayName(const QString &typeName);

    const MacrosCache &predefinedMacrosCache() const;
    const HeaderPathsCache &headerPathsCache() const;

    virtual void toolChainUpdated();

    // Make sure to call this function when deriving!
    virtual bool fromMap(const QVariantMap &data);

private:
    ToolChain(const ToolChain &) = delete;
    ToolChain &operator=(const ToolChain &) = delete;

    const std::unique_ptr<Internal::ToolChainPrivate> d;

    friend class Internal::ToolChainSettingsAccessor;
    friend class ToolChainFactory;
};

class PROJECTEXPLORER_EXPORT ToolChainFactory : public QObject
{
    Q_OBJECT

public:
    ToolChainFactory();
    ~ToolChainFactory() override;

    static const QList<ToolChainFactory *> allToolChainFactories();

    QString displayName() const { return m_displayName; }
    Core::Id supportedToolChainType() const;

    virtual QList<ToolChain *> autoDetect(const QList<ToolChain *> &alreadyKnown);
    virtual QList<ToolChain *> detectForImport(const ToolChainDescription &tcd);

    virtual bool canCreate() const;
    virtual ToolChain *create();

    ToolChain *restore(const QVariantMap &data);

    static QByteArray idFromMap(const QVariantMap &data);
    static Core::Id typeIdFromMap(const QVariantMap &data);
    static void autoDetectionToMap(QVariantMap &data, bool detected);

    static ToolChain *createToolChain(Core::Id toolChainType);

    QSet<Core::Id> supportedLanguages() const;

    void setUserCreatable(bool userCreatable);

protected:
    void setDisplayName(const QString &name) { m_displayName = name; }
    void setSupportedToolChainType(const Core::Id &supportedToolChainType);
    void setSupportedLanguages(const QSet<Core::Id> &supportedLanguages);
    void setSupportsAllLanguages(bool supportsAllLanguages);
    void setToolchainConstructor(const std::function<ToolChain *()> &constructor);

    class Candidate {
    public:
        Utils::FilePath compilerPath;
        QString compilerVersion;

        bool operator==(const ToolChainFactory::Candidate &other) const {
            return compilerPath == other.compilerPath
                    && compilerVersion == other.compilerVersion;
        }
    };

    using Candidates = QVector<Candidate>;

private:
    QString m_displayName;
    Core::Id m_supportedToolChainType;
    QSet<Core::Id> m_supportedLanguages;
    bool m_supportsAllLanguages = false;
    bool m_userCreatable = false;
    std::function<ToolChain *()> m_toolchainConstructor;
};

} // namespace ProjectExplorer