/*
 * Copyright (C) 2014 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#if ENABLE(GAMEPAD) && PLATFORM(MAC)

#include "GamepadProvider.h"
#include "HIDGamepad.h"
#include "Timer.h"
#include <IOKit/hid/IOHIDManager.h>
#include <wtf/Deque.h>
#include <wtf/HashMap.h>
#include <wtf/RetainPtr.h>

namespace WebCore {

class GamepadProviderClient;

class HIDGamepadProvider : public GamepadProvider {
    WTF_MAKE_NONCOPYABLE(HIDGamepadProvider);
    friend class NeverDestroyed<HIDGamepadProvider>;
public:
    WEBCORE_EXPORT static HIDGamepadProvider& singleton();

    WEBCORE_EXPORT void startMonitoringGamepads(GamepadProviderClient&) final;
    WEBCORE_EXPORT void stopMonitoringGamepads(GamepadProviderClient&) final;
    const Vector<PlatformGamepad*>& platformGamepads() final { return m_gamepadVector; }

    WEBCORE_EXPORT void stopMonitoringInput();
    WEBCORE_EXPORT void startMonitoringInput();
    
    void deviceAdded(IOHIDDeviceRef);
    void deviceRemoved(IOHIDDeviceRef);
    void valuesChanged(IOHIDValueRef);

private:
    HIDGamepadProvider();

    std::unique_ptr<HIDGamepad> removeGamepadForDevice(IOHIDDeviceRef);

    void openAndScheduleManager();
    void closeAndUnscheduleManager();

    void connectionDelayTimerFired();
    void inputNotificationTimerFired();

    unsigned indexForNewlyConnectedDevice();

    Vector<PlatformGamepad*> m_gamepadVector;
    HashMap<IOHIDDeviceRef, std::unique_ptr<HIDGamepad>> m_gamepadMap;

    RetainPtr<IOHIDManagerRef> m_manager;

    bool m_shouldDispatchCallbacks;

    Timer m_connectionDelayTimer;
    Timer m_inputNotificationTimer;
};

} // namespace WebCore

#endif // ENABLE(GAMEPAD) && PLATFORM(MAC)