#ifndef CLIPBOARDURL_H
#define CLIPBOARDURL_H

#include <QMimeData>
#include <QRegularExpression>
#include <QUrl>
#ifndef QT_NO_DEBUG
#include <QDebug>
#endif

namespace ClipboardUrl {

    inline QUrl parseText(const QString &text) {
        QString urlText = text.trimmed();
#ifndef QT_NO_DEBUG
        qDebug() << "[clipboard] raw text:" << text
                 << "UTF-8 hex:" << text.toUtf8().toHex();
#endif
        if (urlText.size() >= 2) {
            const QChar first = urlText.front();
            const QChar last = urlText.back();
            if ((first == '\'' && last == '\'') || (first == '"' && last == '"') || (first == '<' && last == '>'))
                urlText = urlText.mid(1, urlText.size() - 2).trimmed();
        }

        static const QRegularExpression markdownLink(
                QStringLiteral("\\A\\[[^\\r\\n]*\\]\\((https?://[^\\r\\n]+)\\)\\z"),
                QRegularExpression::CaseInsensitiveOption);
        const auto match = markdownLink.match(urlText);
        if (match.hasMatch())
            urlText = match.captured(1);

        const QUrl url = QUrl::fromUserInput(urlText);
#ifndef QT_NO_DEBUG
        qDebug() << "[clipboard] normalized text:" << urlText
                 << "parsed URL:" << url << "valid:" << url.isValid()
                 << "scheme:" << url.scheme() << "host:" << url.host()
                 << "parse error:" << url.errorString();
#endif
        if (!url.isValid() || url.scheme().isEmpty() || url.host().isEmpty())
            return QUrl();
        return url;
    }

    inline QUrl fromMimeData(const QMimeData *mimeData) {
        if (mimeData == nullptr) {
#ifndef QT_NO_DEBUG
            qDebug() << "[clipboard] MIME data unavailable";
#endif
            return QUrl();
        }

        const auto urls = mimeData->urls();
#ifndef QT_NO_DEBUG
        qDebug() << "[clipboard] MIME formats:" << mimeData->formats()
                 << "URL entries:" << urls;
#endif
        if (urls.size() == 1) {
            const QUrl url = urls.first();
            if (url.isValid() && !url.scheme().isEmpty() && !url.host().isEmpty()) {
#ifndef QT_NO_DEBUG
                qDebug() << "[clipboard] using MIME URL:" << url;
#endif
                return url;
            }
        }
        return parseText(mimeData->text());
    }

}// namespace ClipboardUrl

#endif// CLIPBOARDURL_H