using Prism.Events;
using YY.Admin.Core;
using YY.Admin.Core.Services;
using static YY.Admin.Core.SysUserEvents;

namespace YY.Admin.EventBus;

/// <summary>
/// 本地用户事件订阅器：记录本地 CRUD 操作日志。
/// 注意：本地操作不触发 mirror pull（拉取会覆盖本地改动），
/// 后端→桌面的实时同步由 JeecgUserSyncCoordinator 统一负责。
/// 实现 ISingletonDependency 使其由程序集扫描自动注册为单例。
/// </summary>
public class SysUserEventSubscriber : IDisposable, ISingletonDependency
{
    private readonly IEventAggregator _eventAggregator;
    private readonly ILoggerService _logger;
    private readonly List<SubscriptionToken> _subscriptions = new();

    public SysUserEventSubscriber(
        IEventAggregator eventAggregator,
        ILoggerService logger)
    {
        _eventAggregator = eventAggregator;
        _logger = logger;
        SubscribeEvents();
    }

    private void SubscribeEvents()
    {
        _subscriptions.Add(_eventAggregator.GetEvent<AddUserEvent>().Subscribe(OnAddUser, ThreadOption.BackgroundThread));
        _subscriptions.Add(_eventAggregator.GetEvent<UpdateUserEvent>().Subscribe(OnUpdateUser, ThreadOption.BackgroundThread));
        _subscriptions.Add(_eventAggregator.GetEvent<DeleteUserEvent>().Subscribe(OnDeleteUser, ThreadOption.BackgroundThread));
        _subscriptions.Add(_eventAggregator.GetEvent<SetUserStatusEvent>().Subscribe(OnSetUserStatus, ThreadOption.BackgroundThread));
        _subscriptions.Add(_eventAggregator.GetEvent<ChangePwdEvent>().Subscribe(OnChangePwd, ThreadOption.BackgroundThread));
        _subscriptions.Add(_eventAggregator.GetEvent<ResetPwdEvent>().Subscribe(OnResetPwd, ThreadOption.BackgroundThread));
        _subscriptions.Add(_eventAggregator.GetEvent<UnlockUserLoginEvent>().Subscribe(OnUnlockUserLogin, ThreadOption.BackgroundThread));
        _subscriptions.Add(_eventAggregator.GetEvent<RegisterUserEvent>().Subscribe(OnRegisterUser, ThreadOption.BackgroundThread));
        _subscriptions.Add(_eventAggregator.GetEvent<LoginUserEvent>().Subscribe(OnLoginUser, ThreadOption.BackgroundThread));
        _subscriptions.Add(_eventAggregator.GetEvent<LoginOutEvent>().Subscribe(OnLoginOut, ThreadOption.BackgroundThread));
        _subscriptions.Add(_eventAggregator.GetEvent<UpdateUserRoleEvent>().Subscribe(OnUpdateUserRole, ThreadOption.BackgroundThread));
    }

    public void OnAddUser(SysUser payload)
    {
        _logger.Information($"[本地] 新增用户: {payload?.Account}");
    }

    public void OnRegisterUser(SysUser payload)
    {
        _logger.Information($"[本地] 用户注册: {payload?.Account}");
    }

    public void OnUpdateUser((SysUser Original, SysUser Updated) payload)
    {
        _logger.Information($"[本地] 修改用户: {payload.Updated?.Account}");
    }

    public void OnDeleteUser(SysUser payload)
    {
        _logger.Information($"[本地] 删除用户: {payload?.Account}");
    }

    public void OnSetUserStatus((SysUser User, StatusEnum NewStatus) payload)
    {
        _logger.Information($"[本地] 设置状态: {payload.User?.Account} → {payload.NewStatus}");
    }

    public void OnChangePwd(SysUser payload)
    {
        _logger.Information($"[本地] 修改密码: {payload?.Account}");
    }

    public void OnResetPwd(SysUser payload)
    {
        _logger.Information($"[本地] 重置密码: {payload?.Account}");
    }

    public void OnUpdateUserRole((SysUser User, List<long> RoleIds) payload)
    {
        _logger.Information($"[本地] 更新角色: {payload.User?.Account}");
    }

    public void OnUnlockUserLogin(SysUser payload)
    {
        _logger.Information($"[本地] 解除锁定: {payload?.Account}");
    }

    public void OnLoginUser(SysUser payload)
    {
        _logger.Information($"[本地] 登录成功: {payload?.Account ?? "<null>"}");
    }

    public void OnLoginOut(SysUser payload)
    {
        // 勿抛异常：Prism 事件总线上若此处抛错，可能影响同事件其它订阅者
        _logger.Information($"[本地] 用户登出: {payload?.Account ?? "<null>"}");
    }

    public void Dispose()
    {
        foreach (var token in _subscriptions)
        {
            token.Dispose();
        }
    }
}