using Nuuru.Server.DTOs.Booru;

namespace Nuuru.Server.DTOs.Messaging
{
    public class ConversationDto
    {
        public Guid Id { get; set; }
        public string? Title { get; set; }

        /// <summary>
        /// Auto-generated display title if no explicit title set.
        /// For 1-on-1 conversations, shows the other participant's name.
        /// For groups, shows first few participant names.
        /// </summary>
        public string DisplayTitle { get; set; } = string.Empty;

        public DateTime CreatedAt { get; set; }
        public DateTime LastMessageAt { get; set; }
        public int MessageCount { get; set; }
        public bool IsLocked { get; set; }

        public int UnreadCount { get; set; }
        public bool HasUnread { get; set; }

        public UploaderDto Creator { get; set; } = null!;
        public List<ConversationParticipantDto> Participants { get; set; } = [];
        public MessageDto? LastMessage { get; set; }
    }

    public class ConversationParticipantDto
    {
        public Guid UserId { get; set; }
        public UploaderDto User { get; set; } = null!;
        public DateTime JoinedAt { get; set; }
        public bool HasLeft { get; set; }
    }
}