/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
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** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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****************************************************************************/

#ifndef KITMANAGER_H
#define KITMANAGER_H

#include "projectexplorer_export.h"

#include <coreplugin/id.h>

#include <QObject>
#include <QPair>

namespace Utils {
class FileName;
class Environment;
}

namespace ProjectExplorer {
class Task;
class IOutputParser;
class Kit;
class KitConfigWidget;
class KitManager;

namespace Internal {
class KitManagerConfigWidget;
class KitModel;
} // namespace Internal

/**
 * @brief The KitInformation class
 *
 * One piece of information stored in the kit.
 *
 * This needs to get registered with the \a KitManager.
 */
class PROJECTEXPLORER_EXPORT KitInformation : public QObject
{
    Q_OBJECT

public:
    typedef QPair<QString, QString> Item;
    typedef QList<Item> ItemList;

    Core::Id id() const { return m_id; }
    int priority() const { return m_priority; }

    virtual QVariant defaultValue(Kit *) const = 0;

    // called to find issues with the kit
    virtual QList<Task> validate(const Kit *) const = 0;
    // called to fix issues with this kitinformation. Does not modify the rest of the kit.
    virtual void fix(Kit *) { return; }
    // called on initial setup of a kit.
    virtual void setup(Kit *) { return; }

    virtual ItemList toUserOutput(const Kit *) const = 0;

    virtual KitConfigWidget *createConfigWidget(Kit *) const = 0;

    virtual void addToEnvironment(const Kit *k, Utils::Environment &env) const;
    virtual IOutputParser *createOutputParser(const Kit *k) const;

    virtual QString displayNamePostfix(const Kit *k) const;

protected:
    void setId(Core::Id id) { m_id = id; }
    void setPriority(int priority) { m_priority = priority; }
    void notifyAboutUpdate(Kit *k);

private:
    Core::Id m_id;
    int m_priority; // The higher the closer to the top.
};

class PROJECTEXPLORER_EXPORT KitMatcher
{
public:
    virtual ~KitMatcher() { }
    virtual bool matches(const Kit *k) const = 0;
};

class PROJECTEXPLORER_EXPORT KitManager : public QObject
{
    Q_OBJECT

public:
    static QObject *instance();
    ~KitManager();

    static QList<Kit *> kits();
    static QList<Kit *> matchingKits(const KitMatcher &matcher);
    static Kit *find(Core::Id id);
    static Kit *find(const KitMatcher &matcher);
    static Kit *defaultKit();

    static QList<KitInformation *> kitInformation();

    static Internal::KitManagerConfigWidget *createConfigWidget(Kit *k);

    static void deleteKit(Kit *k);

    static QString uniqueKitName(const Kit *k, const QString &name, const QList<Kit *> &allKits);

    static bool registerKit(ProjectExplorer::Kit *k);
    static void deregisterKit(ProjectExplorer::Kit *k);
    static void setDefaultKit(ProjectExplorer::Kit *k);

    static void registerKitInformation(ProjectExplorer::KitInformation *ki);
    static void deregisterKitInformation(ProjectExplorer::KitInformation *ki);

public slots:
    void saveKits();

signals:
    void kitAdded(ProjectExplorer::Kit *);
    // Kit is still valid when this call happens!
    void kitRemoved(ProjectExplorer::Kit *);
    // Kit was updated.
    void kitUpdated(ProjectExplorer::Kit *);
    void unmanagedKitUpdated(ProjectExplorer::Kit *);
    // Default kit was changed.
    void defaultkitChanged();
    // Something changed.
    void kitsChanged();

    void kitsLoaded();

private:
    explicit KitManager(QObject *parent = 0);

    static bool setKeepDisplayNameUnique(bool unique);

    // Make sure the this is only called after all
    // KitInformation are registered!
    void restoreKits();
    class KitList
    {
    public:
        KitList()
        { }
        Core::Id defaultKit;
        QList<Kit *> kits;
    };
    KitList restoreKits(const Utils::FileName &fileName);

    static void notifyAboutDisplayNameChange(ProjectExplorer::Kit *k);
    static void notifyAboutUpdate(ProjectExplorer::Kit *k);
    void addKit(Kit *k);

    friend class ProjectExplorerPlugin; // for constructor
    friend class Kit;
    friend class Internal::KitModel;
    friend class KitInformation; // for notifyAbutUpdate
};

} // namespace ProjectExplorer

#endif // KITMANAGER_H