using Microsoft.AspNetCore.Mvc;
using Dapr;
using LingAdmin.AuthorizationService.Services;
using LingAdmin.Shared.Events;

namespace LingAdmin.AuthorizationService.Controllers;

/// <summary>
/// 事件订阅控制器 - 处理来自其他服务的事件
/// </summary>
[ApiController]
[Route("api/[controller]")]
public class EventsController : ControllerBase
{
    private readonly IRoleService _roleService;
    private readonly ILogger<EventsController> _logger;

    public EventsController(IRoleService roleService, ILogger<EventsController> logger)
    {
        _roleService = roleService;
        _logger = logger;
    }

    /// <summary>
    /// 处理用户创建事件 - 自动分配默认角色
    /// </summary>
    [Topic(EventTopics.PubSubName, EventTopics.UserCreated)]
    [HttpPost("user-created")]
    public async Task<ActionResult> HandleUserCreated([FromBody] UserCreatedEvent @event)
    {
        _logger.LogInformation("Received user-created event for user {UserId}", @event.UserId);

        try
        {
            // 分配默认的 "User" 角色 (RoleId = 3)
            await _roleService.AssignRolesToUserAsync(@event.UserId, new[] { 3 });
            
            _logger.LogInformation("Assigned default role to user {UserId}", @event.UserId);
            return Ok();
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Error processing user-created event for user {UserId}", @event.UserId);
            // 返回 OK 以避免 Dapr 重试
            return Ok();
        }
    }

    /// <summary>
    /// 处理用户删除事件 - 清理用户角色
    /// </summary>
    [Topic(EventTopics.PubSubName, EventTopics.UserDeleted)]
    [HttpPost("user-deleted")]
    public async Task<ActionResult> HandleUserDeleted([FromBody] dynamic @event)
    {
        var userId = (int)@event.userId;
        _logger.LogInformation("Received user-deleted event for user {UserId}", userId);

        try
        {
            // 获取用户的所有角色并移除
            var userRoles = await _roleService.GetUserRolesAsync(userId);
            // 这里可以添加清理逻辑
            
            _logger.LogInformation("Cleaned up roles for deleted user {UserId}", userId);
            return Ok();
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Error processing user-deleted event for user {UserId}", userId);
            return Ok();
        }
    }
}