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#include <QtTest/QtTest>
#include <QtCore/qlocale.h>
#include <qaudioinput.h>
#include <qaudiodeviceinfo.h>
#include <qaudio.h>
#include <qaudioformat.h>


class tst_QAudioInput : public QObject
{
    Q_OBJECT
public:
    tst_QAudioInput(QObject* parent=0) : QObject(parent) {}

private slots:
    void initTestCase();
    void settings();
    void buffers();
    void notifyInterval();
    void pullFile();

private:
    bool           available;
    QAudioFormat   format;
    QAudioInput*   audio;
};

void tst_QAudioInput::initTestCase()
{
    format.setFrequency(8000);
    format.setChannels(1);
    format.setSampleSize(8);
    format.setCodec("audio/pcm");
    format.setByteOrder(QAudioFormat::LittleEndian);
    format.setSampleType(QAudioFormat::UnSignedInt);

    // Only perform tests if audio input device exists!
    QList<QAudioDeviceInfo> devices = QAudioDeviceInfo::availableDevices(QAudio::AudioInput);
    if(devices.size() > 0)
        available = true;
    else {
        qWarning()<<"NOTE: no audio input device found, no test will be performed";
        available = false;
    }

    if(available)
        audio = new QAudioInput(format, this);
}

void tst_QAudioInput::settings()
{
    if(available) {
        // Confirm the setting we added in the init function.
        QAudioFormat f = audio->format();

        QVERIFY(format.channels() == f.channels());
        QVERIFY(format.frequency() == f.frequency());
        QVERIFY(format.sampleSize() == f.sampleSize());
        QVERIFY(format.codec() == f.codec());
        QVERIFY(format.byteOrder() == f.byteOrder());
        QVERIFY(format.sampleType() == f.sampleType());
    }
}

void tst_QAudioInput::buffers()
{
    if(available) {
        // Should always have a buffer size greater than zero.
        int store = audio->bufferSize();
        audio->setBufferSize(4096);
        QVERIFY(audio->bufferSize() > 0);
        audio->setBufferSize(store);
        QVERIFY(audio->bufferSize() == store);
    }
}

void tst_QAudioInput::notifyInterval()
{
    if(available) {
        QVERIFY(audio->notifyInterval() == 1000);   // Default

        audio->setNotifyInterval(500);
        QVERIFY(audio->notifyInterval() == 500);    // Custom

        audio->setNotifyInterval(1000);             // reset
    }
}

void tst_QAudioInput::pullFile()
{
    if(available) {
        QFile filename(SRCDIR "test.raw");
        filename.open( QIODevice::WriteOnly | QIODevice::Truncate );

        QSignalSpy readSignal(audio, SIGNAL(notify()));
        QSignalSpy stateSignal(audio, SIGNAL(stateChanged(QAudio::State)));

        // Always have default states, before start
        QVERIFY(audio->state() == QAudio::StoppedState);
        QVERIFY(audio->error() == QAudio::NoError);
        QVERIFY(audio->elapsedUSecs() == 0);

        audio->start(&filename);
        QTest::qWait(20);
        // Check state and periodSize() are valid non-zero values.
        QVERIFY(audio->state() == QAudio::ActiveState);
        QVERIFY(audio->error() == QAudio::NoError);
        QVERIFY(audio->elapsedUSecs() > 10000 && audio->elapsedUSecs() < 800000);
        QVERIFY(audio->periodSize() > 0);
        QVERIFY(stateSignal.count() == 1); // State changed to QAudio::ActiveState

        // Wait until finished...
        QTest::qWait(5000);

        QVERIFY(readSignal.count() > 0);
        QVERIFY(audio->processedUSecs() > 0);

        audio->stop();
        QTest::qWait(20);
        QVERIFY(audio->state() == QAudio::StoppedState);
        QVERIFY(audio->elapsedUSecs() == 0);
        // Can only check to make sure we got at least 1 more signal, but can be more.
        QVERIFY(stateSignal.count() > 1);

        filename.close();
    }
}

QTEST_MAIN(tst_QAudioInput)

#include "tst_qaudioinput.moc"
