using MessagePack;
namespace ChatRoomContract;

/// <summary>
/// Minimal message description
/// </summary>
[MessagePackObject]
public class Message
{
    /// <summary>
    /// Message ID
    /// </summary>
    [Key(0)]
    public int id;
    /// <summary>
    /// Message contents
    /// </summary>
    [Key(1)]
    public string contents;
    /// <summary>
    /// Does this message need to be censored?
    /// </summary>
    [Key(2)]
    public bool needsToBeCensored;
}

/// <summary>
/// Chat room service contract
/// </summary>
public interface IChatRoomService
{
    /// <summary>
    /// Register client with a name
    /// </summary>
    /// <param name="name">Name of client, can be duplicate between clients</param>
    /// <returns>Client ID</returns>
    int RegisterClient(string name);

    /// <summary>
    /// Get number of strikes a participant has
    /// </summary>
    /// <param name="clientId">Client ID</param>
    /// <returns>Number of strikes</returns>
    int GetStrikes(int clientId);

    /// <summary>
    /// Get timestamp until when the client is blocked
    /// </summary>
    /// <param name="clientId">Client ID</param>
    /// <returns>Optional datetime object</returns>
    DateTime? GetBlockedUntil(int clientId);

    /// <summary>
    /// Send a message, will be given to a moderator to be approved
    /// </summary>
    /// <param name="clientId">Client ID</param>
    /// <param name="contents">Message contents</param>
    /// <param name="needsToBeCensored">Does this message need to be censored?</param>
    /// <returns>Was sending successful, can fail if user is blocked</returns>
    bool SendMessage(int clientId, string contents, bool needsToBeCensored);

    /// <summary>
    /// Get the next message which hasn't been approved or rejected
    /// </summary>
    /// <returns>Message object. Returns null if there is no message</returns>
    Message? GetNewMessage();

    /// <summary>
    /// Reject a message
    /// </summary>
    /// <param name="messageId">Message ID</param>
    void RejectMessage(int messageId);

    /// <summary>
    /// Approve a message
    /// </summary>
    /// <param name="messageId">Message ID</param>
    void ApproveMessage(int messageId);
}