#include <QtCore/QObject>
#include <QtCore/QList>

#include <gluon/core/singleton.h>

enum State
{
    None,
    Up,
    Down
};

/*
 * An input action component.
 *
 * This defines a base action, such as "jump" or "attack".
 */
class InputAction : public QObject
{
    Q_OBJECT

    /*
     * Connect this to an input device's button changed event.
     *
     * Override in your own subclass.
     */
    virtual State checkActionState() = 0;

signals:
    void actionStateChanged(State state);

public:
    void update()
    {
        State state = this->checkActionState();
        if(state != None) emit this->actionStateChanged(state);
    }
};

/*
 * Manager for all input actions.
 *
 * Runs update as necessary.
 */
class InputActionManager : public GluonCore::Singleton<InputActionManager>
{
    Q_OBJECT

    QList<InputAction *> m_actions;

public:
    InputActionManager()
        : GluonCore::Singleton<InputActionManager>()
    {
        this->m_actions = QList<InputAction *>();
    }

    /*
     * Call update on all child actions.
     */
    void update()
    {
        foreach(InputAction *action_p, this->m_actions)
        {
            action_p->update();
        }
    }

    /*
     * Register an action with the InputActionManager.
     */
    void registerAction(InputAction *action_p)
    {
        this->m_actions.append(action_p);
    }
};