using IdentityService.Domain.Events;
using IM.DomainCommons;
using MassTransit;
using MediatR;
using Microsoft.AspNetCore.Identity;
using System.ComponentModel.DataAnnotations.Schema;

namespace IdentityService.Domain.Entities
{
    public class User : IdentityUser<Guid>, IHasCreationTime, IHasDeletionTime, ISoftDelete, IDomainEvents, IHasModificationTime
    {
        [NotMapped]
        public List<INotification> domainEvents = [];

        /// <summary>
        /// 用户昵称
        /// </summary>
        public string NickName { get; private set; } = null!;
        /// <summary>
        /// 用户签名
        /// </summary>
        public string Description { get; private set; } = "";
        /// <summary>
        /// 地区
        /// </summary>
        public string Region { get; private set; } = "未知地区";

        /// <summary>
        /// 用户在线状态
        /// 0（默认）：不在线
        /// 1：在线
        /// </summary>
        //public UserOnlineState OnlineStatus { get; private set; }


        /// <summary>
        /// 账户状态
        /// (0：未激活,1：正常,2：封禁)
        /// </summary>
        public UserState Status { get; private set; }

        /// <summary>
        /// 用户头像链接
        /// </summary>
        public string? Avatar { get; private set; }

        public DateTimeOffset CreationTime { get; private set; } = DateTime.Now;

        public DateTimeOffset? Deletion { get; private set; }

        public bool IsDeleted { get; private set; }

        public DateTimeOffset? ModificationTime { get; private set; }

        private User() { }
        public User(string username, string nickName)
        {
            Id = NewId.NextGuid();
            UserName = username;
            NickName = nickName;
            Avatar = "https://api.dicebear.com/7.x/thumbs/svg?seed=" + UserName;
        }

        public void Ban(string reason)
        {
            if (this.Status == UserState.Banned) return;
            this.Status = UserState.Banned;

            AddDomainEvent(new UserBannedDomainEvent(this.Id, reason));
        }

        public void Unban() { if (Status == UserState.Banned) Status = UserState.Normal; }

        public void Update(string? nickName, string? region, string? avatar, string? desc)
        {
            if (nickName != null)
            {
                if (nickName.Trim() == string.Empty) throw new DomainException("昵称不可为空");
                if (nickName.Length > 20) throw new DomainException("昵称不可大于20");
                this.NickName = nickName;
            }

            if (region != null)
            {
                if (region.Trim() == string.Empty) throw new DomainException("地区不可为空");
                if (region.Length > 20) throw new DomainException("地区不可大于20");
                this.Region = region;
            }

            if (avatar != null)
            {

                this.Avatar = avatar;
            }

            if (desc != null)
            {
                this.Description = desc;
            }

            ModificationTime = DateTime.Now;
            AddDomainEvent(new UserProfileUpdateDomainEvent(this));
        }

        public void SoftDelete()
        {
            this.IsDeleted = true;
        }

        public IEnumerable<INotification> GetDomainEvents()
        {
            return domainEvents;
        }

        public void AddDomainEvent(INotification eventItem)
        {
            domainEvents.Add(eventItem);
        }

        public void AddDomainEventIfAbsent(INotification eventItem)
        {
            if (!domainEvents.Contains(eventItem))
            {
                domainEvents.Add(eventItem);
            }
        }

        public void ClearDomainEvents()
        {
            domainEvents.Clear();
        }
    }
}