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** Copyright (C) 2016 The Qt Company Ltd.
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** This file is part of the QtBluetooth module of the Qt Toolkit.
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****************************************************************************/

#include "btdeviceinquiry_p.h"
#include "btutility_p.h"

#include <QtCore/qloggingcategory.h>
#include <QtCore/qdebug.h>

QT_USE_NAMESPACE

@implementation QT_MANGLE_NAMESPACE(DarwinBTClassicDeviceInquiry)
{
    IOBluetoothDeviceInquiry *m_inquiry;
    bool m_active;
    DarwinBluetooth::DeviceInquiryDelegate *m_delegate;//C++ "delegate"
}

- (id)initWithDelegate:(DarwinBluetooth::DeviceInquiryDelegate *)delegate
{
    if (self = [super init]) {
        Q_ASSERT_X(delegate, Q_FUNC_INFO, "invalid device inquiry delegate (null)");

        m_inquiry = [[IOBluetoothDeviceInquiry inquiryWithDelegate:self] retain];

        if (m_inquiry) {
            [m_inquiry setInquiryLength:15];
            [m_inquiry setUpdateNewDeviceNames:NO];//Useless, disable!
            m_delegate = delegate;
        } else {
            qCCritical(QT_BT_DARWIN) << "failed to create a device inquiry";
        }

        m_active = false;
    }

    return self;
}

- (void)dealloc
{
    // Noop if m_inquiry is nil.
    [m_inquiry setDelegate:nil];
    if (m_active)
        [m_inquiry stop];
    [m_inquiry release];

    [super dealloc];
}

- (bool)isActive
{
    return m_active;
}

- (IOReturn)start
{
    if (!m_inquiry)
        return kIOReturnNoPower;

    if (m_active)
        return kIOReturnBusy;

    m_active = true;
    [m_inquiry clearFoundDevices];
    const IOReturn result = [m_inquiry start];
    if (result != kIOReturnSuccess) {
        // QtBluetooth will probably convert an error into UnknownError,
        // loosing the actual information.
        qCWarning(QT_BT_DARWIN) << "failed with IOKit error code:" << result;
        m_active = false;
    }

    return result;
}

- (IOReturn)stop
{
    if (m_active) {
        Q_ASSERT_X(m_inquiry, Q_FUNC_INFO, "active but nil inquiry");

        m_active = false;
        const IOReturn res = [m_inquiry stop];
        if (res != kIOReturnSuccess)
            m_active = true;
        else
            qCDebug(QT_BT_DARWIN) << "-stop, success (waiting for 'inquiryComplete')";

        return res;
    }

    return kIOReturnSuccess;
}

- (void)deviceInquiryComplete:(IOBluetoothDeviceInquiry *)sender
        error:(IOReturn)error aborted:(BOOL)aborted
{
    Q_UNUSED(aborted);

    if (sender != m_inquiry) // Can never happen in the current version.
        return;

    m_active = false;

    Q_ASSERT_X(m_delegate, Q_FUNC_INFO, "invalid device inquiry delegate (null)");

    if (error != kIOReturnSuccess) {
        // QtBluetooth has not too many error codes, 'UnknownError' is not really
        // useful, report the actual error code here:
        qCWarning(QT_BT_DARWIN) << "IOKit error code: " << error;
        m_delegate->error(error);
    } else {
        m_delegate->inquiryFinished();
    }
}

- (void)deviceInquiryDeviceFound:(IOBluetoothDeviceInquiry *)sender
        device:(IOBluetoothDevice *)device
{
    if (sender != m_inquiry) // Can never happen in the current version.
        return;

    Q_ASSERT_X(m_delegate, Q_FUNC_INFO, "invalid device inquiry delegate (null)");
    m_delegate->classicDeviceFound(device);
}

- (void)deviceInquiryStarted:(IOBluetoothDeviceInquiry *)sender
{
    Q_UNUSED(sender);
}

@end
