using System;

namespace LiveForum.Model.Events
{
    /// <summary>
    /// 消息事件基类
    /// </summary>
    public abstract class MessageEventBase
    {
        /// <summary>
        /// 事件唯一ID
        /// </summary>
        public string EventId { get; set; } = Guid.NewGuid().ToString();

        /// <summary>
        /// 事件发生时间
        /// </summary>
        public DateTime OccurredAt { get; set; } = DateTime.Now;

        /// <summary>
        /// 触发用户ID（发送消息的用户）
        /// </summary>
        public long TriggerId { get; set; }

        /// <summary>
        /// 接收消息的用户ID
        /// </summary>
        public long ReceiverId { get; set; }

        /// <summary>
        /// 事件类型名称
        /// </summary>
        public abstract string EventType { get; }
    }

    /// <summary>
    /// 内容快照（帖子、评论等）
    /// </summary>
    public class ContentSnapshot
    {
        /// <summary>
        /// 帖子ID
        /// </summary>
        public long? PostId { get; set; }

        /// <summary>
        /// 帖子标题
        /// </summary>
        public string PostTitle { get; set; }

        /// <summary>
        /// 评论ID
        /// </summary>
        public long? CommentId { get; set; }

        /// <summary>
        /// 评论内容
        /// </summary>
        public string CommentContent { get; set; }
    }

    /// <summary>
    /// 点赞事件
    /// </summary>
    public class LikeEvent : MessageEventBase
    {
        public override string EventType => "Like";

        /// <summary>
        /// 点赞目标类型：1-帖子，2-评论，3-送花
        /// </summary>
        public byte ContentType { get; set; }

        /// <summary>
        /// 点赞目标ID
        /// </summary>
        public long ContentId { get; set; }

        /// <summary>
        /// 内容快照（帖子标题或评论内容）
        /// </summary>
        public ContentSnapshot Content { get; set; }
    }

    /// <summary>
    /// 评论回复事件
    /// </summary>
    public class CommentReplyEvent : MessageEventBase
    {
        public override string EventType => "CommentReply";

        /// <summary>
        /// 新评论ID
        /// </summary>
        public long CommentId { get; set; }

        /// <summary>
        /// 评论内容
        /// </summary>
        public string CommentContent { get; set; }

        /// <summary>
        /// 帖子ID
        /// </summary>
        public long PostId { get; set; }

        /// <summary>
        /// 帖子标题
        /// </summary>
        public string PostTitle { get; set; }

        /// <summary>
        /// 父评论ID（如果是回复评论）
        /// </summary>
        public long? ParentCommentId { get; set; }

        /// <summary>
        /// 我的评论内容（被回复的评论内容）
        /// </summary>
        public string MyCommentContent { get; set; }

        /// <summary>
        /// 是否是直接评论帖子（false表示回复评论）
        /// </summary>
        public bool IsDirectComment { get; set; }
    }

    /// <summary>
    /// 自定义消息事件（用于简化版消息发送）
    /// </summary>
    public class CustomMessageEvent : MessageEventBase
    {
        public override string EventType => "Custom";

        /// <summary>
        /// 消息类型：1-回复消息，2-点赞消息
        /// </summary>
        public int MessageType { get; set; }

        /// <summary>
        /// 消息标题
        /// </summary>
        public string Title { get; set; }

        /// <summary>
        /// 消息内容
        /// </summary>
        public string Content { get; set; }

        /// <summary>
        /// 我的评论内容（可选，用于回复消息）
        /// </summary>
        public string MyCommentContent { get; set; }
    }
}