#include "Control.h"
#include "ui_Control.h"

Control::Control(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Control)
    , playList()
{
    ui->setupUi(this);
    mediaPlayer = new QMediaPlayer(this);
    index = 0;


    progressBar = new ProgressBar();
    musicOption = new MusicOption();
    volumeSet = new VolumeSet();
    playPattern = new PlayPattern();
    songCollection = new SongCollection();
    prePlay = new PrePlay();
    play = new Play();
    nextPlay = new NextPlay();


    songCollection->isMyLove = false;

    QString currentPath = QDir::currentPath();

    timer = new QTimer(this);
    timer->start(10);
    connect(timer, &QTimer::timeout, this, &Control::on_timer_timeout);

    ui->volumeSlider->setValue(100);
    updateSongTime();

    connect(mediaPlayer, &QMediaPlayer::stateChanged, this, [=]() {
        playPattern->changePlayPattern(ui, mediaPlayer, index, playList);
        if (mediaPlayer->state() == QMediaPlayer::StoppedState && mediaPlayer->position() == mediaPlayer->duration()) {
            play->newSong(ui, index,mediaPlayer, playList, songNameList, songCollection);
            updateSongTime();
        }
    });

    setPauseImage();
}

Control::~Control()
{
    delete ui;
    delete progressBar;
    delete musicOption;
    delete volumeSet;
    delete playPattern;
    delete prePlay;
    delete play;
    delete nextPlay;
    delete timer;
}


void Control::on_musicList_clicked()
{
    QString pubPath;
    auto musicList = musicOption->chooseMusic(this, pubPath);

    if (musicList.length() == 0) return;
    //把音乐路径保存下来
    for(auto file :musicList) {
        qDebug() << file;
        songNameList.addSong(file);
        playList.addSong(pubPath + "/" + file);
    }

    playList.unique();
    songNameList.unique();

    //把音乐放在listweidget中展示
    ui->listWidget->clear();
    ui->listWidget->addItems(songNameList.returnPlayList());

    //如果第一次选择歌单，默认选中第一个音乐
    if (mediaPlayer->media().isNull()) {
        ui->listWidget->setCurrentRow(0);

        play->newSong(ui, index, mediaPlayer, playList, songNameList, songCollection);

        mediaPlayer->pause();
        setPauseImage();
    }
    // 如果不是第一次选择歌单，则还是选中原来的哪个
    else
        ui->listWidget->setCurrentRow(index);
}


void Control::on_playMode_clicked()
{
    if (mediaPlayer->media().isNull()) return;

    playPattern->playPattern = ++playPattern->playPattern % 3;
    if (playPattern->playPattern == 1) playPattern->randomlyPlayedSongs.clear();
    playPattern->changePlayPattern(ui, mediaPlayer, index, playList);
    if (mediaPlayer->state() == QMediaPlayer::StoppedState && mediaPlayer->position() == mediaPlayer->duration()) {
        play->newSong(ui, index, mediaPlayer, playList, songNameList, songCollection);
        updateSongTime();
    }
}


void Control::on_pre_clicked()
{
    int isPlaying = false;
    if (mediaPlayer->state() == QMediaPlayer::PlayingState)
    {
        isPlaying = true;
    }
    prePlay->prePlay(ui, mediaPlayer, index, playList);
    prePlay->newSong(ui, index, mediaPlayer, playList, songNameList, songCollection);
    updateSongTime();
    if (!isPlaying)
    {
        mediaPlayer->pause();
        ui->play->setStyleSheet(" background-image: url(:/picture/8.png); ");
    }

}


void Control::on_play_clicked()
{
    play->play(ui, index,mediaPlayer, playList, songNameList, songCollection);
    updateSongTime();
}


void Control::on_next_clicked()
{
    if (mediaPlayer->media().isNull()) return;

    int isPlaying = false;
    if (mediaPlayer->state() == QMediaPlayer::PlayingState)
    {
        isPlaying = true;
    }

    nextPlay->nextPlay(ui, mediaPlayer, index, playList);
    nextPlay->newSong(ui, index, mediaPlayer, playList, songNameList, songCollection);
    updateSongTime();

    if (!isPlaying)
    {
        mediaPlayer->pause();
        ui->play->setStyleSheet(" background-image: url(:/picture/8.png);");
    }
}


void Control::on_loveSong_clicked()
{
    if (mediaPlayer->media().isNull()) return;

    if (songCollection->isMyLove)
    {
        songCollection->deleteFromMyLove(songNameList[index].toString());
        songCollection->isMyLove = false;
        ui->loveSong->setStyleSheet("background-image: url(:/picture/12.jpg);");

    }
    else
    {
        songCollection->addToMyLove(playList[index].toString(), songNameList[index].toString());
        songCollection->isMyLove = true;
        ui->loveSong->setStyleSheet("background-image: url(:/picture/11.png);");
    }

}


void Control::on_volume_clicked()
{
    if (mediaPlayer->media().isNull()) return;

    if (mediaPlayer->volume())
        volumeSet->setVolume1image(ui);
    else
        volumeSet->setVolume2image(ui);

}


void Control::on_horizontalSlider_valueChanged(int value)
{

    qint64 progress = value * 1000;
    if (qAbs(progress - mediaPlayer->position()) > 100)
        mediaPlayer->setPosition(ui->horizontalSlider->value() * 1000);
}


void Control::on_volumeSlider_valueChanged(int value)
{
    volumeSet->setVolume(mediaPlayer, value);
}

//实现播放暂停是时的图片更改
void Control::setPauseImage() {
    ui->play->setStyleSheet(" background-image: url(:/picture/8.png); ");
}

void Control::setPlayImage() {
    ui->play->setStyleSheet(" background-image: url(:/picture/4.png); ");
}

//显示歌曲时长及与进度条连接
void Control::on_timer_timeout()
{
    progressBar->updateProgress(ui, mediaPlayer);
}

void Control::updateSongTime() {
    connect(mediaPlayer, &QMediaPlayer::durationChanged, this, [=](qint64 duration)
    {
        ui->horizontalSlider->setRange(0, mediaPlayer->duration() / 1000);
        ui->horizontalSlider->setMaximum(mediaPlayer->duration() / 1000);
        ui->horizontalSlider->setValue(0);

        int minutes = duration / 1000 / 60;
        int seconds = duration / 1000 % 60;
        QString *totalTime = nullptr;
        if (seconds >= 10) {
            totalTime = new QString(QString::number(minutes) + ":" + QString::number(seconds));
        }
        else {
            totalTime = new QString(QString::number(minutes) + ":" + "0" + QString::number(seconds));
        }
        ui->duration->setText(*totalTime);
    });
}