#include "NowPlayingPanel.h"
#include "CoverArtWidget.h"
#include "engine/MusicLibrary.h"

#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QFont>

NowPlayingPanel::NowPlayingPanel(QWidget *parent)
    : QGroupBox("Now Playing", parent)
    , m_cover(new CoverArtWidget)
{
    buildLayout();

    connect(m_btnPlay, &QPushButton::clicked, this, &NowPlayingPanel::playPauseClicked);
    connect(m_btnPrev, &QPushButton::clicked, this, &NowPlayingPanel::prevClicked);
    connect(m_btnNext, &QPushButton::clicked, this, &NowPlayingPanel::nextClicked);

    connect(m_seekBar, &QSlider::sliderPressed,  this, [this]{ m_seekDragging = true; });
    connect(m_seekBar, &QSlider::sliderReleased, this, [this]{
        m_seekDragging = false;
        emit seekRequested(m_seekBar->value() / 1000.0);
    });

    connect(m_volSlider, &QSlider::valueChanged, this, &NowPlayingPanel::volumeChanged);
}

void NowPlayingPanel::buildLayout()
{
    m_cover->setFixedSize(130, 130);

    QFont boldF = m_lblTitle->font();
    boldF.setBold(true);
    boldF.setPointSizeF(11);
    m_lblTitle->setFont(boldF);

    m_seekBar->setRange(0, 1000);
    m_seekBar->setValue(0);

    m_volSlider->setRange(0, 100);
    m_volSlider->setValue(80);
    m_volSlider->setFixedWidth(90);

    auto *seekRow = new QHBoxLayout;
    seekRow->addWidget(m_seekBar);
    seekRow->addWidget(m_lblTime);

    auto *btns = new QHBoxLayout;
    btns->setSpacing(3);
    btns->addWidget(m_btnPrev);
    btns->addWidget(m_btnPlay);
    btns->addWidget(m_btnNext);
    btns->addSpacing(8);
    btns->addWidget(m_chkShuffle);
    btns->addWidget(m_chkRepeat);

    auto *transport = new QHBoxLayout;
    transport->addLayout(btns);
    transport->addStretch();
    transport->addWidget(new QLabel("Volume:"));
    transport->addWidget(m_volSlider);

    auto *metaRow = new QHBoxLayout;
    metaRow->setSpacing(8);
    metaRow->addWidget(new QLabel("Sample rate:"));
    metaRow->addWidget(m_lblSampleRate);
    metaRow->addWidget(new QLabel("Bits/Sample:"));
    metaRow->addWidget(m_lblBitsPerSample);
    metaRow->addWidget(new QLabel("Codec:"));
    metaRow->addWidget(m_lblCodec);
    metaRow->addStretch();

    auto *right = new QVBoxLayout;
    right->setSpacing(4);
    right->addWidget(m_lblTitle);
    right->addWidget(m_lblArtist);
    right->addWidget(m_lblAlbum);
    right->addLayout(metaRow);
    right->addLayout(seekRow);
    right->addLayout(transport);

    auto *hlay = new QHBoxLayout(this);
    hlay->addWidget(m_cover);
    hlay->addLayout(right, 1);
}

void NowPlayingPanel::clearAudioInfo()
{
    m_lblSampleRate->setText("-");
    m_lblBitsPerSample->setText("-");
    m_lblCodec->setText("-");
}

void NowPlayingPanel::updateTrack(const engine::Track *t)
{
    if (!t) {
        clearAudioInfo();
        return;
    }
    m_cover->setTrack(t);
    m_lblTitle->setText(t->displayTitle());
    m_lblArtist->setText(t->artist);
    m_lblAlbum->setText(t->album +
        (t->year > 0 ? "  (" + QString::number(t->year) + ")" : ""));
    clearAudioInfo();
    m_seekBar->setValue(0);
    m_btnPlay->setText("Pause");
}

void NowPlayingPanel::updatePosition(qint64 posFrames, qint64 totalFrames, float sampleRate)
{
    auto fmt = [](qint64 s) {
        return QString("%1:%2").arg(s / 60).arg(s % 60, 2, 10, QChar('0'));
    };

    qint64 posSec = (sampleRate > 0) ? qint64(posFrames / sampleRate) : 0;
    qint64 totSec = (sampleRate > 0 && totalFrames > 0)
                    ? qint64(totalFrames / sampleRate) : 0;

    m_lblTime->setText(fmt(posSec) + " / " + fmt(totSec));

    if (!m_seekDragging && totalFrames > 0)
        m_seekBar->setValue(int(posFrames * 1000 / totalFrames));
}

void NowPlayingPanel::updateAudioInfo(int sampleRate, int bitsPerSample, const QString &codec)
{
    m_lblSampleRate->setText(sampleRate > 0 ? QString("%1 Hz").arg(sampleRate) : "-");
    m_lblBitsPerSample->setText(bitsPerSample > 0 ? QString("%1").arg(bitsPerSample) : "-");
    m_lblCodec->setText(!codec.isEmpty() ? codec : "-");
}

void NowPlayingPanel::setPlaybackActive(bool playing)
{
    m_btnPlay->setText(playing ? "Pause" : "Play");
}