/*
 * itunestunecontroller.cpp
 * Copyright (C) 2006  Remko Troncon
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */

#include "itunestunecontroller.h"

#include <CoreFoundation/CoreFoundation.h>
#include <QDebug>
#include <QString>
#include <QTime>
#include <QtGlobal>

/**
 * \class ITunesController
 * \brief A controller for the Mac OS X version of iTunes.
 */

static QString CFStringToQString(CFStringRef s)
{
    QString result;

    if (s != NULL) {
        CFIndex length = CFStringGetMaximumSizeForEncoding(CFStringGetLength(s), kCFStringEncodingUTF8) + 1;
        char *  buffer = new char[length];
        if (CFStringGetCString(s, buffer, length, kCFStringEncodingUTF8)) {
            result = QString::fromUtf8(buffer);
        } else {
            qWarning("itunesplayer.cpp: CFString conversion failed.");
        }
        delete[] buffer;
    }
    return result;
}

ITunesController::ITunesController()
{
    // TODO: Poll iTunes for current playing tune
    CFNotificationCenterRef center = CFNotificationCenterGetDistributedCenter();
    CFNotificationCenterAddObserver(center, this, ITunesController::iTunesCallback,
                                    CFSTR("com.apple.iTunes.playerInfo"), NULL,
                                    CFNotificationSuspensionBehaviorDeliverImmediately);
}

ITunesController::~ITunesController()
{
    CFNotificationCenterRef center = CFNotificationCenterGetDistributedCenter();
    CFNotificationCenterRemoveObserver(center, this, CFSTR("com.apple.iTunes.playerInfo"), NULL);
}

Tune ITunesController::currentTune() const { return currentTune_; }

void ITunesController::iTunesCallback(CFNotificationCenterRef, void *observer, CFStringRef, const void *,
                                      CFDictionaryRef info)
{
    Tune              tune;
    ITunesController *controller = (ITunesController *)observer;

    CFStringRef cf_state = (CFStringRef)CFDictionaryGetValue(info, CFSTR("Player State"));
    if (CFStringCompare(cf_state, CFSTR("Paused"), 0) == kCFCompareEqualTo) {
        // qDebug() << "itunesplayer.cpp: Paused";
        emit controller->stopped();
    } else if (CFStringCompare(cf_state, CFSTR("Stopped"), 0) == kCFCompareEqualTo) {
        // qDebug() << "itunesplayer.cpp: Stopped";
        emit controller->stopped();
    } else if (CFStringCompare(cf_state, CFSTR("Playing"), 0) == kCFCompareEqualTo) {
        // qDebug() << "itunesplayer.cpp: Playing";
        tune.setArtist(CFStringToQString((CFStringRef)CFDictionaryGetValue(info, CFSTR("Artist"))));
        tune.setName(CFStringToQString((CFStringRef)CFDictionaryGetValue(info, CFSTR("Name"))));
        tune.setAlbum(CFStringToQString((CFStringRef)CFDictionaryGetValue(info, CFSTR("Album"))));

        CFNumberRef cf_track = (CFNumberRef)CFDictionaryGetValue(info, CFSTR("Track Number"));
        if (cf_track) {
            int tracknr;
            if (!CFNumberGetValue(cf_track, kCFNumberIntType, &tracknr)) {
                qWarning("itunesplayer.cpp: Number value conversion failed.");
            }
            tune.setTrack(QString::number(tracknr));
        }

        CFNumberRef cf_time = (CFNumberRef)CFDictionaryGetValue(info, CFSTR("Total Time"));
        int         time    = 0;
        if (cf_time && !CFNumberGetValue(cf_time, kCFNumberIntType, &time)) {
            qWarning("itunesplayer.cpp: Number value conversion failed.");
        }
        tune.setTime((unsigned int)(time / 1000));
        controller->currentTune_ = tune;
        emit controller->playing(tune);
    } else {
        qWarning("itunesplayer.cpp: Unknown state.");
    }
}
