/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
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** 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
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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****************************************************************************/

#pragma once

#include "projectconfiguration.h"
#include "projectexplorerconstants.h"
#include "applicationlauncher.h"
#include "devicesupport/idevice.h"

#include <utils/qtcassert.h>
#include <utils/icon.h>

#include <QPointer>
#include <QWidget>

#include <memory>

QT_BEGIN_NAMESPACE
class QFormLayout;
QT_END_NAMESPACE

namespace Utils { class OutputFormatter; }

namespace ProjectExplorer {
class Abi;
class BuildConfiguration;
class IRunConfigurationAspect;
class RunConfiguration;
class RunConfigWidget;
class RunControl;
class Target;

namespace Internal { class RunControlPrivate; }

// FIXME: This should also contain a handle to an remote device if used.
class PROJECTEXPLORER_EXPORT ProcessHandle
{
public:
    explicit ProcessHandle(quint64 pid = 0);

    bool isValid() const;
    void setPid(quint64 pid);
    quint64 pid() const;
    QString toString() const;

    bool equals(const ProcessHandle &) const;

private:
    quint64 m_pid;
};

inline bool operator==(const ProcessHandle &p1, const ProcessHandle &p2) { return p1.equals(p2); }
inline bool operator!=(const ProcessHandle &p1, const ProcessHandle &p2) { return !p1.equals(p2); }

/**
 * An interface for a hunk of global or per-project
 * configuration data.
 *
 */

class PROJECTEXPLORER_EXPORT ISettingsAspect : public QObject
{
    Q_OBJECT

public:
    ISettingsAspect() { }

    /// Create a configuration widget for this settings aspect.
    virtual QWidget *createConfigWidget(QWidget *parent) = 0;
    /// "Virtual default constructor"
    virtual ISettingsAspect *create() const = 0;
    /// "Virtual copy constructor"
    ISettingsAspect *clone() const;

protected:
    ///
    friend class IRunConfigurationAspect;
    /// Converts current object into map for storage.
    virtual void toMap(QVariantMap &map) const = 0;
    /// Read object state from @p map.
    virtual void fromMap(const QVariantMap &map) = 0;
};


/**
 * An interface to facilitate switching between hunks of
 * global and per-project configuration data.
 *
 */

class PROJECTEXPLORER_EXPORT IRunConfigurationAspect : public QObject
{
    Q_OBJECT

public:
    explicit IRunConfigurationAspect(RunConfiguration *runConfig);
    ~IRunConfigurationAspect() override;

    virtual IRunConfigurationAspect *create(RunConfiguration *runConfig) const = 0;
    virtual IRunConfigurationAspect *clone(RunConfiguration *runConfig) const;
    virtual RunConfigWidget *createConfigurationWidget();

    void setId(Core::Id id) { m_id = id; }
    void setDisplayName(const QString &displayName) { m_displayName = displayName; }
    void setProjectSettings(ISettingsAspect *settings);
    void setGlobalSettings(ISettingsAspect *settings);

    QString displayName() const { return m_displayName; }
    Core::Id id() const { return m_id; }
    bool isUsingGlobalSettings() const { return m_useGlobalSettings; }
    void setUsingGlobalSettings(bool value);
    void resetProjectToGlobalSettings();

    ISettingsAspect *projectSettings() const { return m_projectSettings; }
    ISettingsAspect *globalSettings() const { return m_globalSettings; }
    ISettingsAspect *currentSettings() const;
    RunConfiguration *runConfiguration() const { return m_runConfiguration; }

protected:
    friend class RunConfiguration;
    virtual void fromMap(const QVariantMap &map);
    virtual void toMap(QVariantMap &data) const;

private:
    Core::Id m_id;
    QString m_displayName;
    bool m_useGlobalSettings = false;
    RunConfiguration *m_runConfiguration = nullptr;
    ISettingsAspect *m_projectSettings = nullptr; // Owned if present.
    ISettingsAspect *m_globalSettings = nullptr;  // Not owned.
};

class PROJECTEXPLORER_EXPORT ClonableConcept
{
public:
    virtual ~ClonableConcept() = default;
    virtual ClonableConcept *clone() const = 0;
    virtual bool equals(const std::unique_ptr<ClonableConcept> &other) const = 0;
};

template <class T>
class ClonableModel : public ClonableConcept
{
public:
    ClonableModel(const T &data) : m_data(data) { }
    ~ClonableModel() Q_DECL_NOEXCEPT { } // gcc 4.7.3
    ClonableConcept *clone() const override { return new ClonableModel(*this); }

    bool equals(const std::unique_ptr<ClonableConcept> &other) const override
    {
        auto that = dynamic_cast<const ClonableModel<T> *>(other.get());
        return that && m_data == that->m_data;
    }

    T m_data;
};

class PROJECTEXPLORER_EXPORT Runnable
{
public:
    Runnable() = default;
    Runnable(const Runnable &other) : d(other.d->clone()) { }
    Runnable(Runnable &&other) /* MSVC 2013 doesn't want = default */ : d(std::move(other.d)) {}
    template <class T> Runnable(const T &data) : d(new ClonableModel<T>(data)) {}

    void operator=(Runnable other) { d = std::move(other.d); }

    template <class T> bool is() const {
        return dynamic_cast<ClonableModel<T> *>(d.get()) != 0;
    }

    template <class T> const T &as() const {
        return static_cast<ClonableModel<T> *>(d.get())->m_data;
    }

    bool operator==(const Runnable &other) const;

private:
    std::unique_ptr<ClonableConcept> d;
};

class PROJECTEXPLORER_EXPORT Connection
{
public:
    Connection() = default;
    Connection(const Connection &other) : d(other.d->clone()) { }
    Connection(Connection &&other) /* MSVC 2013 doesn't want = default */ : d(std::move(other.d)) {}
    template <class T> Connection(const T &data) : d(new ClonableModel<T>(data)) {}

    void operator=(Connection other) { d = std::move(other.d); }

    template <class T> bool is() const {
        return dynamic_cast<ClonableModel<T> *>(d.get()) != 0;
    }

    template <class T> const T &as() const {
        return static_cast<ClonableModel<T> *>(d.get())->m_data;
    }

private:
    std::unique_ptr<ClonableConcept> d;
};

// Documentation inside.
class PROJECTEXPLORER_EXPORT RunConfiguration : public ProjectConfiguration
{
    Q_OBJECT

public:
    ~RunConfiguration() override;

    virtual bool isEnabled() const;
    virtual QString disabledReason() const;
    virtual QWidget *createConfigurationWidget() = 0;

    virtual bool isConfigured() const;
    // Pop up configuration dialog in case for example the executable is missing.
    enum ConfigurationState { Configured, UnConfigured, Waiting };
    // TODO rename function
    virtual ConfigurationState ensureConfigured(QString *errorMessage = nullptr);

    Target *target() const;

    virtual Utils::OutputFormatter *createOutputFormatter() const;

    bool fromMap(const QVariantMap &map) override;
    QVariantMap toMap() const override;

    QList<IRunConfigurationAspect *> extraAspects() const;
    IRunConfigurationAspect *extraAspect(Core::Id id) const;

    template <typename T> T *extraAspect() const
    {
        QTC_ASSERT(m_aspectsInitialized, return nullptr);
        foreach (IRunConfigurationAspect *aspect, m_aspects)
            if (T *result = qobject_cast<T *>(aspect))
                return result;
        return nullptr;
    }

    virtual Runnable runnable() const;
    virtual Abi abi() const;

    void addExtraAspects();
    void addExtraAspect(IRunConfigurationAspect *aspect);

signals:
    void enabledChanged();
    void requestRunActionsUpdate();
    void configurationFinished();

protected:
    RunConfiguration(Target *parent, Core::Id id);
    RunConfiguration(Target *parent, RunConfiguration *source);

    /// convenience function to get current build configuration.
    BuildConfiguration *activeBuildConfiguration() const;

private:
    void ctor();

    QList<IRunConfigurationAspect *> m_aspects;
    bool m_aspectsInitialized;
};

class PROJECTEXPLORER_EXPORT IRunConfigurationFactory : public QObject
{
    Q_OBJECT

public:
    explicit IRunConfigurationFactory(QObject *parent = nullptr);

    enum CreationMode {UserCreate, AutoCreate};
    virtual QList<Core::Id> availableCreationIds(Target *parent, CreationMode mode = UserCreate) const = 0;
    virtual QString displayNameForId(Core::Id id) const = 0;

    virtual bool canCreate(Target *parent, Core::Id id) const = 0;
    RunConfiguration *create(Target *parent, Core::Id id);
    virtual bool canRestore(Target *parent, const QVariantMap &map) const = 0;
    RunConfiguration *restore(Target *parent, const QVariantMap &map);
    virtual bool canClone(Target *parent, RunConfiguration *product) const = 0;
    virtual RunConfiguration *clone(Target *parent, RunConfiguration *product) = 0;

    static IRunConfigurationFactory *find(Target *parent, const QVariantMap &map);
    static IRunConfigurationFactory *find(Target *parent, RunConfiguration *rc);
    static QList<IRunConfigurationFactory *> find(Target *parent);

signals:
    void availableCreationIdsChanged();

private:
    virtual RunConfiguration *doCreate(Target *parent, Core::Id id) = 0;
    virtual RunConfiguration *doRestore(Target *parent, const QVariantMap &map) = 0;
};

class PROJECTEXPLORER_EXPORT IRunControlFactory : public QObject
{
    Q_OBJECT
public:
    explicit IRunControlFactory(QObject *parent = nullptr);

    virtual bool canRun(RunConfiguration *runConfiguration, Core::Id mode) const = 0;
    virtual RunControl *create(RunConfiguration *runConfiguration, Core::Id mode, QString *errorMessage) = 0;

    virtual IRunConfigurationAspect *createRunConfigurationAspect(RunConfiguration *rc);
};

class PROJECTEXPLORER_EXPORT RunConfigWidget : public QWidget
{
    Q_OBJECT

public:
    virtual QString displayName() const = 0;

signals:
    void displayNameChanged(const QString &);
};

class PROJECTEXPLORER_EXPORT RunControl : public QObject
{
    Q_OBJECT

public:
    enum StopResult {
        StoppedSynchronously, // Stopped.
        AsynchronousStop     // Stop sequence has been started
    };

    RunControl(RunConfiguration *runConfiguration, Core::Id mode);
    ~RunControl() override;
    virtual void start() = 0;

    virtual bool promptToStop(bool *optionalPrompt = nullptr) const;
    virtual StopResult stop() = 0;
    virtual bool isRunning() const = 0;
    virtual bool supportsReRunning() const { return true; }

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

    void setIcon(const Utils::Icon &icon);
    Utils::Icon icon() const;

    ProcessHandle applicationProcessHandle() const;
    void setApplicationProcessHandle(const ProcessHandle &handle);
    Abi abi() const;
    IDevice::ConstPtr device() const;

    RunConfiguration *runConfiguration() const;
    Project *project() const;
    bool canReUseOutputPane(const RunControl *other) const;

    Utils::OutputFormatter *outputFormatter();
    Core::Id runMode() const;

    const Runnable &runnable() const;
    void setRunnable(const Runnable &runnable);

    const Connection &connection() const;
    void setConnection(const Connection &connection);

public slots:
    void bringApplicationToForeground(qint64 pid);
    void appendMessage(const QString &msg, Utils::OutputFormat format);

signals:
    void appendMessage(ProjectExplorer::RunControl *runControl,
        const QString &msg, Utils::OutputFormat format);
    void started();
    void finished();
    void applicationProcessHandleChanged();

protected:
    bool showPromptToStopDialog(const QString &title, const QString &text,
                                const QString &stopButtonText = QString(),
                                const QString &cancelButtonText = QString(),
                                bool *prompt = nullptr) const;

private:
    void bringApplicationToForegroundInternal();
    Internal::RunControlPrivate *d;
};

} // namespace ProjectExplorer