using System.Text.RegularExpressions;
using Mapster;
using Microsoft.Extensions.Caching.Distributed;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;
using NPin.Framework.SqlSugarCore.Abstractions;
using NPin.Framework.Upms.Domain.Entities;
using NPin.Framework.Upms.Domain.Entities.ValueObjects;
using NPin.Framework.Upms.Domain.Repositories;
using NPin.Framework.Upms.Domain.Shared.Caches;
using NPin.Framework.Upms.Domain.Shared.Consts;
using NPin.Framework.Upms.Domain.Shared.Dtos;
using NPin.Framework.Upms.Domain.Shared.Etos;
using NPin.Framework.Upms.Domain.Shared.Options;
using Volo.Abp.Authorization;
using Volo.Abp.Caching;
using Volo.Abp.Domain.Services;
using Volo.Abp.EventBus.Local;
using Volo.Abp.Uow;

namespace NPin.Framework.Upms.Domain.Managers;

/// <summary>
/// 用户管理器 领域服务
/// </summary>
public partial class UserManager : DomainService
{
    [GeneratedRegex("^[a-zA-Z0-9]+$")]
    private static partial Regex UsernameRegex();

    private readonly IUserRepository _repository;
    private readonly ISqlSugarRepository<RoleEntity> _repositoryRole;

    private readonly ISqlSugarRepository<UserRoleEntity> _repositoryUserRole;
    private readonly ISqlSugarRepository<UserPostEntity> _repositoryUserPost;
    private readonly ISqlSugarRepository<UserOrganizationEntity> _repositoryUserOrg;

    private IDistributedCache<UserInfoCacheItem, UserInfoCacheKey> _userCache;
    private ILocalEventBus _localEventBus;

    public UserManager(
        IUserRepository repository,
        ISqlSugarRepository<UserRoleEntity> repositoryUserRole,
        ISqlSugarRepository<UserPostEntity> repositoryUserPost,
        ISqlSugarRepository<UserOrganizationEntity> repositoryUserOrg,
        IDistributedCache<UserInfoCacheItem, UserInfoCacheKey> userCache,
        ILocalEventBus localEventBus, ISqlSugarRepository<RoleEntity> repositoryRole)
    {
        _repository = repository;
        _repositoryUserRole = repositoryUserRole;
        _repositoryUserPost = repositoryUserPost;
        _repositoryUserOrg = repositoryUserOrg;
        _userCache = userCache;
        _localEventBus = localEventBus;
        _repositoryRole = repositoryRole;
    }

    /// <summary>
    /// 创建用户
    /// </summary>
    /// <param name="entity"></param>
    public async Task CreateAsync(UserEntity entity)
    {
        await ValidateUser(entity);

        var returnEntity = await _repository.InsertReturnEntityAsync(entity);
        entity = returnEntity;

        // 触发事件
        await _localEventBus.PublishAsync(new UserCreatedEventArgs(entity.Id));
    }

    private async Task ValidateUser(UserEntity entity)
    {
        // TODO 不一定非要用户名，这里需要更自由的逻辑
        if (entity.Username is UserConst.Admin or UserConst.TenantAdmin)
        {
            throw new UserFriendlyException("无效的用户名");
        }

        if (entity.Username.Length < 2)
        {
            throw new UserFriendlyException("用户名长度错误，需大于2个字符");
        }

        // 正则表达式，匹配只包含数字和字母的字符串
        var isMatch = UsernameRegex().IsMatch(entity.Username);
        if (!isMatch)
        {
            throw new UserFriendlyException("用户名不能包含除【字母】与【数字】的其他字符");
        }

        // 密码长度判断
        // TODO（需要读取配置）
        if (entity.EncryptPassword.Password.Length < 6)
        {
            throw new UserFriendlyException($"密码格式错误，长度需大于等于{6}位");
        }

        if (!string.IsNullOrEmpty(entity.PhoneNumber))
        {
            if (await _repository.IsAnyAsync(x => x.PhoneNumber == entity.PhoneNumber))
            {
                throw new UserFriendlyException("手机号重复");
            }
        }
    }

    /// <summary>
    /// 设置默认角色
    /// </summary>
    /// <param name="userId"></param>
    public async Task SetDefaultRoleAsync(Guid userId)
    {
        // 检查默认角色是否存在，不存在不处理
        var role = await _repositoryRole.GetFirstAsync(x => x.Code == UserConst.DefaultRoleCode);
        if (role is not null)
        {
            await SetRoleAsync([userId], [role.Id]);
        }
    }

    /// <summary>
    /// 给用户设置角色
    /// </summary>
    /// <param name="userIds"></param>
    /// <param name="roleIds"></param>
    [UnitOfWork]
    public async Task SetRoleAsync(List<Guid> userIds, List<Guid> roleIds)
    {
        // 删除用户之前的所有关系（物理）
        await _repositoryUserRole.DeleteAsync(u => userIds.Contains(u.UserId));

        var entities = (from userId in userIds
                from roleId in roleIds
                select new UserRoleEntity { UserId = userId, RoleId = roleId })
            .ToList();

        await _repositoryUserRole.InsertRangeAsync(entities);
    }

    /// <summary>
    /// 设置用户岗位
    /// </summary>
    /// <param name="userIds"></param>
    /// <param name="postIds"></param>
    [UnitOfWork]
    public async Task SetPostAsync(List<Guid> userIds, List<Guid> postIds)
    {
        // 删除用户之前的所有关系（物理）
        await _repositoryUserPost.DeleteAsync(u => userIds.Contains(u.UserId));

        var entities = (from userId in userIds
                from postId in postIds
                select new UserPostEntity { UserId = userId, PostId = postId })
            .ToList();

        await _repositoryUserPost.InsertRangeAsync(entities);
    }

    /// <summary>
    /// 设置用户组织机构
    /// </summary>
    /// <param name="userIds"></param>
    /// <param name="orgIds"></param>
    [UnitOfWork]
    public async Task SetOrganizationAsync(List<Guid> userIds, List<Guid> orgIds)
    {
        // 删除用户之前的所有关系（物理）
        await _repositoryUserOrg.DeleteAsync(u => userIds.Contains(u.UserId));

        var entities = (from userId in userIds
                from orgId in orgIds
                select new UserOrganizationEntity { UserId = userId, OrganizationId = orgId })
            .ToList();

        await _repositoryUserOrg.InsertRangeAsync(entities);
    }

    /// <summary>
    /// 从缓存中获取用户信息，若缓存不存在则查库
    /// </summary>
    /// <param name="userId"></param>
    /// <returns></returns>
    /// <exception cref="AbpAuthorizationException">库中无此用户，403</exception>
    public async Task<UserFullDto> GetInfoByCacheAsync(Guid userId)
    {
        // 1. 缓存获取
        UserFullDto ret = null;
        var tokenExpires = LazyServiceProvider.GetRequiredService<IOptions<JwtOptions>>().Value.ExpiresMinuteTime;
        var cached = await _userCache.GetOrAddAsync(new UserInfoCacheKey(userId),
            async () =>
            {
                // 2. 库查询
                var user = await _repository.GetAllInfoAsync(userId);
                var dto = EntityMapToDto(user);
                ret = dto ?? throw new AbpAuthorizationException();
                
                return new UserInfoCacheItem(dto);
            },
            () => new DistributedCacheEntryOptions
            {
                AbsoluteExpirationRelativeToNow = TimeSpan.FromMinutes(tokenExpires)
            });

        if (cached is not null)
        {
            ret = cached.Info;
        }

        return ret!;
    }

    private UserFullDto? EntityMapToDto(UserEntity? entity)
    {
        if (entity is null)
        {
            return null;
        }
        var ret = new UserFullDto();

        // 密码过滤
        entity.EncryptPassword = new EncryptPasswordValueObject();

        // 超级管理员特殊处理
        if (UserConst.Admin.Equals(entity.Username))
        {
            ret.User = _userCache.Adapt<UserDto>();
            ret.RoleCodes.Add(UserConst.AdminRoleCode);
            ret.PermissionCodes.Add(UserConst.AdminPermissionCode);
            return ret;
        }

        // 角色
        var roleDtoList = new List<RoleDto>();
        var roleCodes = new HashSet<string>();
        foreach (var role in entity.Roles)
        {
            roleDtoList.Add(role.Adapt<RoleDto>());
            roleCodes.Add(role.Code);
        }

        ret.Roles = roleDtoList;
        ret.RoleCodes = roleCodes;

        // 岗位
        var postDtoList = new List<PostDto>();
        var postCodes = new HashSet<string>();
        foreach (var post in entity.Posts)
        {
            postDtoList.Add(post.Adapt<PostDto>());
            postCodes.Add(post.Code);
        }

        ret.Posts = postDtoList;
        ret.PostCodes = postCodes;

        // 组织结构
        var orgDtoList = new List<OrganizationDto>();
        var orgCodes = new HashSet<string>();
        foreach (var org in entity.Organizations)
        {
            orgDtoList.Add(org.Adapt<OrganizationDto>());
            orgCodes.Add(org.Code);
        }

        ret.Organizations = orgDtoList;
        ret.OrganizationCodes = orgCodes;

        ret.User = entity.Adapt<UserDto>();
        // TODO permissionCode
        return ret;
    }
}