namespace DigitalData.MessagingService.Domain.Enums;

/// <summary>
/// Specifies the protocol used to receive (sync) incoming emails for an account.
/// </summary>
public enum IncomingProtocol
{
    /// <summary>
    /// No incoming protocol configured — account is send-only.
    /// </summary>
    None = 0,

    /// <summary>
    /// Sync emails via IMAP using username/password authentication.
    /// </summary>
    Imap = 1,

    /// <summary>
    /// Sync emails via POP3 using username/password authentication.
    /// </summary>
    Pop3 = 2,

    /// <summary>
    /// Sync emails via IMAP using OAuth2 (XOAUTH2) authentication.
    /// Requires <c>UseOAuth2 = true</c> and valid OAuth2 credentials.
    /// </summary>
    ImapOAuth2 = 3,

    /// <summary>
    /// Sync emails via POP3 using OAuth2 (XOAUTH2) authentication.
    /// Requires <c>UseOAuth2 = true</c> and valid OAuth2 credentials.
    /// </summary>
    Pop3OAuth2 = 4,
}