using System.Collections.Generic;
using System.Threading.Tasks;

namespace LiveForum.IService.Posts
{
    /// <summary>
    /// 浏览服务接口
    /// </summary>
    public interface IViewService
    {
        /// <summary>
        /// 检查是否可以增加浏览次数（10分钟限制检查，优先Redis）
        /// </summary>
        /// <param name="userId">用户ID</param>
        /// <param name="postId">帖子ID</param>
        /// <returns>是否可以增加浏览次数</returns>
        Task<bool> CanAddViewAsync(long userId, long postId);

        /// <summary>
        /// 获取浏览次数（优先Redis，再查数据库）
        /// </summary>
        /// <param name="postId">帖子ID</param>
        /// <returns>浏览次数</returns>
        Task<int> GetViewCountAsync(long postId);

        /// <summary>
        /// 批量查询浏览次数
        /// </summary>
        /// <param name="postIds">帖子ID列表</param>
        /// <returns>帖子ID到浏览次数的映射</returns>
        Task<Dictionary<long, int>> BatchGetViewCountAsync(List<long> postIds);

        /// <summary>
        /// 执行增加浏览操作（Redis+队列）
        /// </summary>
        /// <param name="userId">用户ID</param>
        /// <param name="postId">帖子ID</param>
        /// <returns>是否操作成功</returns>
        Task<bool> AddViewAsync(long userId, long postId);
    }
}