using Base;
using Infrastructure;
using Infrastructure.Model;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;
using Model;
using Model.Base;
using Services;
using Util;

namespace Middleware
{
    /// <summary>
    /// API授权判断
    /// </summary>
    public class ActionPermissionFilter : ActionFilterAttribute//, IAsyncActionFilter
    {
        private NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();

        /// <summary>
        /// 权限字符串，例如 system:user:view
        /// </summary>
        public string Permission { get; set; } = string.Empty;
        /// <summary>
        /// 角色字符串，例如 common,admin
        /// </summary>
        public string RolePermi { get; set; } = string.Empty;
        private bool HasPermi { get; set; }
        public ActionPermissionFilter() { }
        public ActionPermissionFilter(string permission)
        {
            Permission = permission;
            HasPermi = !string.IsNullOrEmpty(Permission);
        }

        /// <summary>
        /// 执行Action前校验是否有权限访问
        /// </summary>
        /// <param name="context"></param>
        /// <param name="next"></param>
        /// <returns></returns>
        public override Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
        {
            TokenModel info = JwtUtil.GetLoginUser(context.HttpContext);

            if (info != null && info?.userId > 0)
            {
                long userId = info.userId;
                List<string> perms = CacheService.GetUserPerms(GlobalConstant.UserPermKEY + userId);
                List<string> rolePerms = info.RoleIds;

                if (perms == null)
                {
                    var sysPermissionService = App.GetService<ISysPermissionService>();
                    perms = sysPermissionService.List();

                    CacheService.SetUserPerms(GlobalConstant.UserPermKEY + userId, perms);
                }

                if (perms.Exists(f => f.Equals(GlobalConstant.AdminPerm)))
                {
                    HasPermi = true;
                }
                else if (rolePerms.Exists(f => f.Equals(GlobalConstant.AdminRole)))
                {
                    HasPermi = true;
                }
                else if (!string.IsNullOrEmpty(Permission))
                {
                    HasPermi = perms.Exists(f => f.ToLower() == Permission.ToLower());
                }
                if (!HasPermi && !string.IsNullOrEmpty(RolePermi))
                {
                    HasPermi = info.RoleIds.Contains(RolePermi);
                }
                var url = context.HttpContext.Request.Path;
                if (!HasPermi && !Permission.Equals("common"))
                {
                    logger.Info($"用户{info.username}没有权限访问{url}，当前权限[{Permission}]");
                    JsonResult result = new(new ApiResult((int)ResultCode.FORBIDDEN, $"你当前没有权限访问,请联系管理员", url))
                    {
                        ContentType = "application/json",
                    };
                    context.HttpContext.Response.StatusCode = 403;
                    context.Result = result;
                }
            }

            return base.OnActionExecutionAsync(context, next);
        }
    }
}