#include "lyricwidget.h"
#include "ui_lyricwidget.h"
#include <QFile>
#include <QTextStream>
#include <QRegExp>
#include <QDebug>
#include <QMenu>
//#include <QClipboard>
#include <QMouseEvent>
//#include <QPlainTextEdit>
LyricWidget::LyricWidget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::LyricWidget)
{
    ui->setupUi(this);
}

LyricWidget::~LyricWidget()
{
    delete ui;
}

void LyricWidget::lyricHandle(const QString &lrcName)
{
    QFile fe(lrcName);
    if(!fe.open(QFile::ReadOnly)){
        ui->label_4->setText(QStringLiteral("没有找到歌词文件"));
        lyricString("没有找到歌词文件");
        return;
    }
    QTextStream in(&fe);//有效解决乱码
    // 获取全部歌词信息
    QString allText = QString(in.readAll());
    // 关闭歌词文件
    fe.close();
    // 将歌词按行分解为歌词列表
    QStringList lines = allText.split("\n");

    // 使用正则表达式将时间标签和歌词内容分离
    QRegExp rx("\\[\\d{2}:\\d{2}\\.\\d{2}\\]");
    foreach (QString oneLine, lines) {
        // 先在当前行的歌词的备份中将时间内容清除，这样就获得了歌词文本
        QString temp = oneLine;
        temp.replace(rx, "");
        // 然后依次获取当前行中的所有时间标签，并分别与歌词文本存入QMap中
        int pos = rx.indexIn(oneLine, 0);
        if (pos != -1) {
            QString cap = rx.cap(0);
            // 将时间标签转换为时间数值，以毫秒为单位
            QRegExp regexp;
            regexp.setPattern("\\d{2}(?=:)");
            regexp.indexIn(cap);
            int minute = regexp.cap(0).toInt();

            regexp.setPattern("\\d{2}(?=\\.)");
            regexp.indexIn(cap);
            int second = regexp.cap(0).toInt();

            regexp.setPattern("\\d{2}(?=\\])");
            regexp.indexIn(cap);
            int millisecond = regexp.cap(0).toInt();

            qint64 totalTime = minute * 60000 + second * 1000 + millisecond * 10;
            // 插入到lrcMap中
            //qDebug()<<"insert"<<totalTime<<temp;

            ircContent.push_back(std::make_pair(totalTime,temp));

        }
    }
    // 如果lrcMap为空
    if (ircContent.isEmpty()) {
        ui->label_4->setText(QStringLiteral(" --- 歌词文件内容错误！"));
        return;
    }
    showLyric(0);
}

void LyricWidget::clearLyric()
{
    ircContent.clear();
    ui->label->setText("");
    ui->label_2->setText("");
    ui->label_3->setText("");
    ui->label_4->setText("");
    ui->label_5->setText("");
    ui->label_6->setText("");
    ui->label_7->setText("");
}
//得到此时应该显示第几句
int LyricWidget::getIndex(const qint64 &position)
{
    static int lyricId=0;
    if(position>ircContent.at(lyricId).first){
        //qDebug()<<position<<ircContent.at(lyricId).first<<ircContent.at(lyricId).second;
        lyricId++;
    }
    return lyricId-1;
}

QString LyricWidget::getLyricText(int index)
{
    if(index<0||index>=ircContent.count())
        return "";
    else return ircContent.at(index).second;

}

//void LyricWidget::mousePressEvent(QMouseEvent *event)
//{
//    if(ircContent.isEmpty()) return;
//    if(event->button()==Qt::RightButton){
//      QMenu menu;QString str;
//      QAction *act=menu.addAction("copy Lyrics");
//      if(act==menu.exec(QCursor::pos())){
//          QClipboard *board=QApplication::clipboard();
//          for(auto &content:ircContent){
//              str+=content.second+"\n";
//          }
//          board->setText(str);
//      }
//    }
//}

void LyricWidget::mouseDoubleClickEvent(QMouseEvent *event)
{
//    plainText=new QPlainTextEdit(this);
//    plainText->resize(this->size());
//    plainText->setGeometry(this->rect());
//    plainText->show();
//    for(auto &content:ircContent){
//        plainText->appendPlainText(content.second);
//    }
}

void LyricWidget::showLyric(const qint64& position){
    if(ircContent.isEmpty()) return;
    int index=getIndex(position);
    //qDebug()<<index;
    emit lyricString(getLyricText(index));
    ui->label->setText(getLyricText(index-3));
    ui->label_2->setText(getLyricText(index-2));
    ui->label_3->setText(getLyricText(index-1));
    ui->label_4->setText(getLyricText(index));
    ui->label_5->setText(getLyricText(index+1));
    ui->label_6->setText(getLyricText(index+2));
    ui->label_7->setText(getLyricText(index+3));
}