using Asp.Versioning;
using MAX.Framework.Dtos;
using MAX.Framework.Security;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using System.Security.Claims;
using Store.Users.Contracts;

namespace Store.Api.Controllers
{
	[ApiController]
	[ApiVersion("1.0")]
	[Route("/v{version:apiVersion}/[controller]/[action]")]
	public class AuthController : ControllerBase
	{
		private readonly IUserAuthenticationService _users;
		private readonly ITokenService _tokenService;
		private readonly ICurrentUser _currentUser;
		private readonly IOnlineUserStore _onlineUserStore;
		private readonly ILogger<AuthController> _logger;

		public AuthController(ITokenService tokenService, ICurrentUser currentUser, IOnlineUserStore onlineUserStore, ILogger<AuthController> logger, IUserAuthenticationService users)
		{
			_users = users;
			_tokenService = tokenService;
			_currentUser = currentUser;
			_onlineUserStore = onlineUserStore;
			_logger = logger;
		}

		/// <summary>
		/// 登录：校验用户名/密码，签发 JWT（单点登录：同用户的新登录会使旧令牌失效）
		/// </summary>
		[HttpPost]
		[AllowAnonymous]
		public async Task<ApiResultBase> Login([FromBody] LoginRequest request)
		{
			_logger.LogInformation("login");
			if (request is null || string.IsNullOrWhiteSpace(request.UserName) || string.IsNullOrWhiteSpace(request.Password))
			{
				return ApiResult.Fail("用户名或密码不能为空", 400);
			}

			// 认证通过后才签发令牌，权限信息以用户模块中的数据库记录为准。
			var user = await _users.Authenticate(request.UserName, request.Password, HttpContext.RequestAborted);
			if (user is null) return ApiResult.Fail("用户名或密码错误", 401);

			var claims = new List<Claim>
			{
				new(JwtClaimTypes.UserName, user.UserName),
			};

			TokenResult token = _tokenService.CreateToken(claims);
			return ApiResult.Ok(token);
		}

		/// <summary>
		/// 退出登录：销毁当前用户的服务端在线会话，令牌立即失效
		/// </summary>
		[HttpPost]
		[Authorize]
		public ApiResult<object?> Logout()
		{
			if (_currentUser.UserName is string username)
			{
				_onlineUserStore.SignOut(username);
			}

			return ApiResult<object?>.Ok(null);
		}

		/// <summary>
		/// 获取当前登录用户信息（需携带 Bearer Token）
		/// </summary>
		[HttpGet]
		[Authorize]
		public ApiResult<object?> Me()
		{
			return ApiResult<object?>.Ok(new
			{
				UserName = _currentUser.UserName,
				NickName = _currentUser.NickName,
			});
		}

		/// <summary>
		/// 在线人员列表（需携带 Bearer Token）
		/// </summary>
		[HttpGet]
		[Authorize]
		public ApiResult<object?> OnlineUsers()
		{
			IReadOnlyList<OnlineUserInfo> users = _onlineUserStore.GetOnlineUsers();
			return ApiResult<object?>.Ok(new
			{
				Count = users.Count,
				Users = users,
			});
		}
	}

	public class LoginRequest
	{
		public string UserName { get; set; } = string.Empty;

		public string Password { get; set; } = string.Empty;
	}
}