#include <QMessageBox>

#include "dlgautodj.h"

#include "library/playlisttablemodel.h"
#include "widget/wtracktableview.h"
#include "util/assert.h"

DlgAutoDJ::DlgAutoDJ(QWidget* parent,
                     ConfigObject<ConfigValue>* pConfig,
                     Library* pLibrary,
                     AutoDJProcessor* pProcessor,
                     TrackCollection* pTrackCollection,
                     MixxxKeyboard* pKeyboard)
        : QWidget(parent),
          Ui::DlgAutoDJ(),
          m_pAutoDJProcessor(pProcessor),
          // no sorting
          m_pTrackTableView(new WTrackTableView(this, pConfig,
                                                pTrackCollection, false)),
          m_pAutoDJTableModel(NULL) {
    setupUi(this);

    m_pTrackTableView->installEventFilter(pKeyboard);
    connect(m_pTrackTableView, SIGNAL(loadTrack(TrackPointer)),
            this, SIGNAL(loadTrack(TrackPointer)));
    connect(m_pTrackTableView, SIGNAL(loadTrackToPlayer(TrackPointer, QString, bool)),
            this, SIGNAL(loadTrackToPlayer(TrackPointer, QString, bool)));
    connect(m_pTrackTableView, SIGNAL(trackSelected(TrackPointer)),
            this, SIGNAL(trackSelected(TrackPointer)));
    connect(pLibrary, SIGNAL(setTrackTableFont(QFont)),
            m_pTrackTableView, SLOT(setTrackTableFont(QFont)));
    connect(pLibrary, SIGNAL(setTrackTableRowHeight(int)),
            m_pTrackTableView, SLOT(setTrackTableRowHeight(int)));

    QBoxLayout* box = dynamic_cast<QBoxLayout*>(layout());
    DEBUG_ASSERT_AND_HANDLE(box) { //Assumes the form layout is a QVBox/QHBoxLayout!
    } else {
        box->removeWidget(m_pTrackTablePlaceholder);
        m_pTrackTablePlaceholder->hide();
        box->insertWidget(1, m_pTrackTableView);
    }

    // We do _NOT_ take ownership of this from AutoDJProcessor.
    m_pAutoDJTableModel = m_pAutoDJProcessor->getTableModel();
    m_pTrackTableView->loadTrackModel(m_pAutoDJTableModel);

    // Override some playlist-view properties:

    // Do not set this because it disables auto-scrolling
    //m_pTrackTableView->setDragDropMode(QAbstractItemView::InternalMove);

    connect(pushButtonShuffle, SIGNAL(clicked(bool)),
            this, SLOT(shufflePlaylistButton(bool)));

    connect(pushButtonSkipNext, SIGNAL(clicked(bool)),
            this, SLOT(skipNextButton(bool)));

#ifdef __AUTODJCRATES__
    connect(pushButtonAddRandom, SIGNAL(clicked(bool)),
            this, SIGNAL(addRandomButton(bool)));
#else // __AUTODJCRATES__
    pushButtonAddRandom->setVisible(false);
    horizontalLayout->removeWidget(pushButtonAddRandom);
#endif // __AUTODJCRATES__

    connect(pushButtonFadeNow, SIGNAL(clicked(bool)),
            this, SLOT(fadeNowButton(bool)));

    connect(spinBoxTransition, SIGNAL(valueChanged(int)),
            this, SLOT(transitionSliderChanged(int)));

    connect(pushButtonAutoDJ, SIGNAL(toggled(bool)),
            this, SLOT(toggleAutoDJButton(bool)));

    // Setup DlgAutoDJ UI based on the current AutoDJProcessor state. Keep in
    // mind that AutoDJ may already be active when DlgAutoDJ is created (due to
    // skin changes, etc.).
    spinBoxTransition->setValue(m_pAutoDJProcessor->getTransitionTime());
    connect(m_pAutoDJProcessor, SIGNAL(transitionTimeChanged(int)),
            this, SLOT(transitionTimeChanged(int)));
    connect(m_pAutoDJProcessor, SIGNAL(autoDJStateChanged(AutoDJProcessor::AutoDJState)),
            this, SLOT(autoDJStateChanged(AutoDJProcessor::AutoDJState)));
    autoDJStateChanged(m_pAutoDJProcessor->getState());
}

DlgAutoDJ::~DlgAutoDJ() {
    qDebug() << "~DlgAutoDJ()";

    // Delete m_pTrackTableView before the table model. This is because the
    // table view saves the header state using the model.
    delete m_pTrackTableView;
}

void DlgAutoDJ::onShow() {
    m_pAutoDJTableModel->select();
}

void DlgAutoDJ::onSearch(const QString& text) {
    // Do not allow filtering the Auto DJ playlist, because
    // Auto DJ will work from the filtered table
    Q_UNUSED(text);
}

void DlgAutoDJ::loadSelectedTrack() {
    m_pTrackTableView->loadSelectedTrack();
}

void DlgAutoDJ::loadSelectedTrackToGroup(QString group, bool play) {
    m_pTrackTableView->loadSelectedTrackToGroup(group, play);
}

void DlgAutoDJ::moveSelection(int delta) {
    m_pTrackTableView->moveSelection(delta);
}

void DlgAutoDJ::shufflePlaylistButton(bool) {
    QModelIndexList indexList = m_pTrackTableView->selectionModel()->selectedRows();

    // Activate regardless of button being checked
    m_pAutoDJProcessor->shufflePlaylist(indexList);
}

void DlgAutoDJ::skipNextButton(bool) {
    // Activate regardless of button being checked
    m_pAutoDJProcessor->skipNext();
}

void DlgAutoDJ::fadeNowButton(bool) {
    // Activate regardless of button being checked
    m_pAutoDJProcessor->fadeNow();
}

void DlgAutoDJ::toggleAutoDJButton(bool enable) {
    AutoDJProcessor::AutoDJError error = m_pAutoDJProcessor->toggleAutoDJ(enable);
    switch (error) {
        case AutoDJProcessor::ADJ_BOTH_DECKS_PLAYING:
            QMessageBox::warning(
                    NULL, tr("Auto-DJ"),
                    tr("One deck must be stopped to enable Auto-DJ mode."),
                    QMessageBox::Ok);
            // Make sure the button becomes unpushed.
            pushButtonAutoDJ->setChecked(false);
            break;
        case AutoDJProcessor::ADJ_DECKS_3_4_PLAYING:
            QMessageBox::warning(
                    NULL, tr("Auto-DJ"),
                    tr("Decks 3 and 4 must be stopped to enable Auto-DJ mode."),
                    QMessageBox::Ok);
            pushButtonAutoDJ->setChecked(false);
            break;
        case AutoDJProcessor::ADJ_OK:
        default:
            break;
    }
}

void DlgAutoDJ::transitionTimeChanged(int time) {
    spinBoxTransition->setValue(time);
}

void DlgAutoDJ::transitionSliderChanged(int value) {
    m_pAutoDJProcessor->setTransitionTime(value);
}

void DlgAutoDJ::autoDJStateChanged(AutoDJProcessor::AutoDJState state) {
    if (state == AutoDJProcessor::ADJ_DISABLED) {
        pushButtonAutoDJ->setChecked(false);
        pushButtonAutoDJ->setToolTip(tr("Enable Auto DJ"));
        pushButtonAutoDJ->setText(tr("Enable Auto DJ"));
        pushButtonFadeNow->setEnabled(false);
        pushButtonSkipNext->setEnabled(false);
    } else {
        // No matter the mode, you can always disable once it is enabled.
        pushButtonAutoDJ->setChecked(true);
        pushButtonAutoDJ->setToolTip(tr("Disable Auto DJ"));
        pushButtonAutoDJ->setText(tr("Disable Auto DJ"));

        // If fading, you can't hit fade now.
        if (state == AutoDJProcessor::ADJ_P1FADING ||
                state == AutoDJProcessor::ADJ_P2FADING ||
                state == AutoDJProcessor::ADJ_ENABLE_P1LOADED) {
            pushButtonFadeNow->setEnabled(false);
        } else {
            pushButtonFadeNow->setEnabled(true);
        }

        // You can always skip the next track if we are enabled.
        pushButtonSkipNext->setEnabled(true);
    }
}

void DlgAutoDJ::setTrackTableFont(const QFont& font) {
    m_pTrackTableView->setTrackTableFont(font);
}

void DlgAutoDJ::setTrackTableRowHeight(int rowHeight) {
    m_pTrackTableView->setTrackTableRowHeight(rowHeight);
}