#ifndef LYRICSPROVIDER_H
#define LYRICSPROVIDER_H

#include <QString>
#include <QList>
#include <QMap>

class PlayListTrack;
class TrackInfo;

class LyricsProvider
{
public:
    LyricsProvider();

    void setName(const QString &name);
    void setTitle(const QString &title);
    void setCharset(const QString &charset);
    void setUrl(const QString &url);
    void addUrlFormat(const QString &replace, const QString &with);
    void addRule(const QList<QPair<QString, QString> > &args, bool exclude = false);
    void addInvalidIndicator(const QString &indicator);
    QString getUrl(const TrackInfo &track) const;
    QString format(const QByteArray &data, const TrackInfo &track) const;
    const QString &name() const;

private:

    struct UrlFormat
    {
        QString replace, with;
    };

    struct Item
    {
        QString begin, end, tag, url;
    };

    typedef QList<Item> Rule;

    QString fixCase(const QString &title) const;
    QMap<QString, QString> generateReplaceMap(const TrackInfo &track) const;
    QString extract(const QString &content, const Rule &rule) const;
    QString exclude(const QString &content, const Rule &rule) const;

    QString m_name, m_title;
    QString m_charset = QLatin1String("utf-8");
    QString m_url;
    QList<UrlFormat> m_urlFormats;
    QList<Rule> m_extractRules;
    QList<Rule> m_excludeRules;
    QStringList m_invalidIndicators;

};

#endif // LYRICSPROVIDER_H