using LiveForum.Code.Base;
using LiveForum.IService.Others;
using Microsoft.AspNetCore.Mvc;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace LiveForum.WebApi.Controllers
{
    /// <summary>
    /// 缓存管理相关接口
    /// </summary>
    [Route("api/[controller]/[action]")]
    [ApiController]
    public class CacheController : ControllerBase
    {
        private readonly ICacheClearService _cacheClearService;

        public CacheController(ICacheClearService cacheClearService)
        {
            _cacheClearService = cacheClearService;
        }

        /// <summary>
        /// 清除所有缓存（支持模式匹配）
        /// </summary>
        /// <param name="request">请求参数，包含模式（如 cache:api:Config:*）</param>
        /// <returns></returns>
        [HttpPost]
        public async Task<BaseResponse<ClearCacheRespDto>> ClearAll([FromBody] ClearAllCacheReq request)
        {
            try
            {
                var success = await _cacheClearService.ClearAllCacheAsync(request.Pattern);
                
                return new BaseResponse<ClearCacheRespDto>(new ClearCacheRespDto
                {
                    Success = success,
                    Message = success ? "清除成功" : "清除失败"
                });
            }
            catch (System.Exception ex)
            {
                return new BaseResponse<ClearCacheRespDto>(ResponseCode.Error, $"清除缓存失败：{ex.Message}");
            }
        }

        /// <summary>
        /// 清除指定Controller的缓存
        /// </summary>
        /// <param name="request">请求参数，包含Controller名称</param>
        /// <returns></returns>
        [HttpPost]
        public async Task<BaseResponse<ClearCacheRespDto>> ClearByController([FromBody] ClearCacheByControllerReq request)
        {
            try
            {
                var success = await _cacheClearService.ClearCacheByControllerAsync(request.Controller);
                
                return new BaseResponse<ClearCacheRespDto>(new ClearCacheRespDto
                {
                    Success = success,
                    Message = success ? "清除成功" : "清除失败"
                });
            }
            catch (System.Exception ex)
            {
                return new BaseResponse<ClearCacheRespDto>(ResponseCode.Error, $"清除缓存失败：{ex.Message}");
            }
        }

        /// <summary>
        /// 清除指定Action的缓存
        /// </summary>
        /// <param name="request">请求参数，包含Controller和Action名称</param>
        /// <returns></returns>
        [HttpPost]
        public async Task<BaseResponse<ClearCacheRespDto>> ClearByAction([FromBody] ClearCacheByActionReq request)
        {
            try
            {
                var success = await _cacheClearService.ClearCacheByActionAsync(request.Controller, request.Action);
                
                return new BaseResponse<ClearCacheRespDto>(new ClearCacheRespDto
                {
                    Success = success,
                    Message = success ? "清除成功" : "清除失败"
                });
            }
            catch (System.Exception ex)
            {
                return new BaseResponse<ClearCacheRespDto>(ResponseCode.Error, $"清除缓存失败：{ex.Message}");
            }
        }

        /// <summary>
        /// 清除指定Key的缓存
        /// </summary>
        /// <param name="request">请求参数，包含缓存Key</param>
        /// <returns></returns>
        [HttpPost]
        public async Task<BaseResponse<ClearCacheRespDto>> ClearByKey([FromBody] ClearCacheByKeyReq request)
        {
            try
            {
                var success = await _cacheClearService.ClearCacheByKeyAsync(request.CacheKey);
                
                return new BaseResponse<ClearCacheRespDto>(new ClearCacheRespDto
                {
                    Success = success,
                    Message = success ? "清除成功" : "清除失败"
                });
            }
            catch (System.Exception ex)
            {
                return new BaseResponse<ClearCacheRespDto>(ResponseCode.Error, $"清除缓存失败：{ex.Message}");
            }
        }

        /// <summary>
        /// 查询缓存Key列表
        /// </summary>
        /// <param name="pattern">缓存Key模式，支持通配符（*）</param>
        /// <returns></returns>
        [HttpGet]
        public async Task<BaseResponse<GetCacheKeysRespDto>> GetKeys([FromQuery] string pattern = null)
        {
            try
            {
                var keys = await _cacheClearService.GetCacheKeysAsync(pattern);
                
                return new BaseResponse<GetCacheKeysRespDto>(new GetCacheKeysRespDto
                {
                    Keys = keys,
                    Count = keys?.Count ?? 0
                });
            }
            catch (System.Exception ex)
            {
                return new BaseResponse<GetCacheKeysRespDto>(ResponseCode.Error, $"查询缓存Key失败：{ex.Message}");
            }
        }
    }

    #region 请求和响应DTO

    /// <summary>
    /// 清除所有缓存请求参数
    /// </summary>
    public record ClearAllCacheReq
    {
        /// <summary>
        /// 缓存Key模式，支持通配符（*），如 cache:api:Config:*
        /// </summary>
        public string Pattern { get; set; }
    }

    /// <summary>
    /// 清除指定Controller缓存请求参数
    /// </summary>
    public record ClearCacheByControllerReq
    {
        /// <summary>
        /// Controller名称（不含Controller后缀，如 "Config"）
        /// </summary>
        public string Controller { get; set; }
    }

    /// <summary>
    /// 清除指定Action缓存请求参数
    /// </summary>
    public record ClearCacheByActionReq
    {
        /// <summary>
        /// Controller名称（不含Controller后缀，如 "Config"）
        /// </summary>
        public string Controller { get; set; }

        /// <summary>
        /// Action名称（如 "GetAppConfig"）
        /// </summary>
        public string Action { get; set; }
    }

    /// <summary>
    /// 清除指定Key缓存请求参数
    /// </summary>
    public record ClearCacheByKeyReq
    {
        /// <summary>
        /// 缓存Key
        /// </summary>
        public string CacheKey { get; set; }
    }

    /// <summary>
    /// 清除缓存响应
    /// </summary>
    public record ClearCacheRespDto
    {
        /// <summary>
        /// 是否成功
        /// </summary>
        public bool Success { get; set; }

        /// <summary>
        /// 消息
        /// </summary>
        public string Message { get; set; }
    }

    /// <summary>
    /// 获取缓存Key列表响应
    /// </summary>
    public record GetCacheKeysRespDto
    {
        /// <summary>
        /// 缓存Key列表
        /// </summary>
        public List<string> Keys { get; set; } = new List<string>();

        /// <summary>
        /// Key数量
        /// </summary>
        public int Count { get; set; }
    }

    #endregion
}