using System.ComponentModel.DataAnnotations;

namespace Nuuru.Server.Models.Messaging
{
    public class Conversation
    {
        public Guid Id { get; set; }

        /// <summary>
        /// Optional title for group conversations
        /// </summary>
        [MaxLength(200)]
        public string? Title { get; set; }

        public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
        public DateTime LastMessageAt { get; set; } = DateTime.UtcNow;
        public int MessageCount { get; set; } = 0;
        public bool IsLocked { get; set; } = false;

        // Creator relationship
        public Guid CreatorId { get; set; }
        public ApplicationUser Creator { get; set; } = null!;

        // Navigation properties
        public ICollection<ConversationParticipant> Participants { get; set; } = [];
        public ICollection<Message> Messages { get; set; } = [];
    }
}