#pragma once

#include <QByteArray>
#include <QHash>
#include <QList>
#include <QString>

/// An inline part referenced by a cid: URL from the HTML body.
struct InlinePart
{
    QString mimeType;
    QByteArray data;
};

struct Attachment
{
    QString filename;   ///< As it appeared in the message. Untrusted.
    QString mimeType;
    QByteArray data;

    /// filename reduced to a basename safe to join onto a directory.
    /// Attacker-controlled input: a filename may contain path separators or
    /// "..", so anything that could escape the target directory is stripped.
    /// Returns a generated name when nothing usable remains.
    QString safeFilename() const;

    /// Writes the attachment into directory. Returns the full path written, or
    /// an empty string on failure with *error set.
    QString saveTo(const QString &directory, QString *error) const;
};

struct ParsedMessage
{
    bool ok = false;
    QString error;

    QString subject;
    QString from;
    QString to;
    QString cc;
    QString date;
    QString messageId;

    QString plainBody;
    QString htmlBody;

    QHash<QString, InlinePart> inlineParts;  ///< Keyed by Content-ID, no <>.
    QList<Attachment> attachments;

    bool hasHtml() const { return !htmlBody.isEmpty(); }
};

/// Parses a single message file using GMime.
///
/// Hand-rolling this would mean reimplementing RFC 2047 encoded words, RFC 2231
/// parameter continuations, transfer encodings, and charset conversion, plus
/// tolerance for malformed real-world mail.
class MimeParser
{
public:
    MimeParser();

    ParsedMessage parse(const QString &filePath) const;
};