using System;
using System.Security.Claims;
using Dpz.Core.EnumLibrary;

namespace Dpz.Core.Public.ViewModel
{
    public static class ViewModelHelper
    {
        /// <summary>
        /// 根据Identity反射获取当前用户信息
        /// 未授权用户返回 null
        /// </summary>
        /// <param name="principal"></param>
        /// <returns></returns>
        public static VmUserInfo UserInfo(this ClaimsPrincipal principal)
        {
            if (principal.Identity.IsAuthenticated)
            {
                var userInfo = new VmUserInfo();
                foreach (var claims in principal.Claims)
                {
                    var property = typeof(VmUserInfo).GetProperty(claims.Type);
                    if (property == null) continue;
                    if (property.PropertyType == typeof(DateTime?))
                    {
                        property.SetValue(userInfo, DateTime.Parse(claims.Value));
                    }
                    else if (property.PropertyType == typeof(Sex))
                    {
                        var sex = Enum.Parse(typeof(Sex), claims.Value);
                        property.SetValue(userInfo, sex);
                    }
                    else if (property.PropertyType == typeof(bool?))
                    {
                        bool.TryParse(claims.Value, out var result);
                        property.SetValue(userInfo, result);
                    }
                    else if (property.PropertyType == typeof(Permissions?))
                    {
                        if (Enum.TryParse(claims.Value, out Permissions permissions))
                        {
                            property.SetValue(userInfo, permissions);
                        }
                    }
                    else
                    {
                        typeof(VmUserInfo).GetProperty(claims.Type)?.SetValue(userInfo, claims.Value);
                    }

                }
                return userInfo;
            }
            return null;
        }
    }
}