//
//  AVUserManager.m
//  AVDemo
//

#import "AVUserManager.h"
#import <AFNetworking/AFNetworking.h>

static NSString * const kUserLoggedInKey = @"AVUserLoggedIn";
static NSString * const kUserUsernameKey = @"AVUserUsername";

@interface AVUserManager ()
@property (nonatomic, strong) AFHTTPSessionManager *sessionManager;
@end

@implementation AVUserManager

+ (instancetype)sharedManager {
    static AVUserManager *instance = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        instance = [[self alloc] init];
    });
    return instance;
}

- (instancetype)init {
    self = [super init];
    if (self) {
        // 从 UserDefaults 读取登录状态
        _isLoggedIn = [[NSUserDefaults standardUserDefaults] boolForKey:kUserLoggedInKey];
        _currentUsername = [[NSUserDefaults standardUserDefaults] stringForKey:kUserUsernameKey];
        
        // 初始化网络请求管理器
        self.sessionManager = [AFHTTPSessionManager manager];
        self.sessionManager.responseSerializer = [AFJSONResponseSerializer serializer];
        self.sessionManager.requestSerializer = [AFJSONRequestSerializer serializer];
        self.sessionManager.requestSerializer.timeoutInterval = 10;
    }
    return self;
}

- (void)loginWithUsername:(NSString *)username
                 password:(NSString *)password
               completion:(void (^)(BOOL success, NSString * _Nullable errorMessage))completion {
    
    // 基本参数验证
    if (username.length == 0) {
        if (completion) {
            completion(NO, @"用户名不能为空");
        }
        return;
    }
    
    if (password.length == 0) {
        if (completion) {
            completion(NO, @"密码不能为空");
        }
        return;
    }
    
    // 登录 API 端点
    NSString *loginURL = @"http://rtmp.sellycloud.io:8089/live/sdk/demo/login";
    
    // 请求参数
    NSDictionary *parameters = @{
        @"username": username,
        @"password": password
    };
    
    NSLog(@"🚀 开始登录请求: %@", username);
    
    // 发起 POST 请求
    [self.sessionManager POST:loginURL parameters:parameters headers:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        // 登录成功
        NSLog(@"✅ 登录成功，服务器响应: %@", responseObject);
        
        // 保存登录状态
        [self saveLoginStateWithUsername:username];
        
        // 可以根据需要保存服务器返回的其他信息（如 token、userId 等）
        // 例如：
        // if (responseObject[@"token"]) {
        //     [[NSUserDefaults standardUserDefaults] setObject:responseObject[@"token"] forKey:@"AVUserToken"];
        // }
        
        // 回调成功
        if (completion) {
            completion(YES, nil);
        }
        
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        // 登录失败
        NSLog(@"❌ 登录失败: %@", error.localizedDescription);
        
        NSString *errorMessage = @"登录失败，请检查用户名和密码";
        
        // 尝试获取 HTTP 状态码
        NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)task.response;
        if (httpResponse) {
            NSLog(@"❌ HTTP 状态码: %ld", (long)httpResponse.statusCode);
        }
        
        // 尝试解析服务器返回的错误信息
        if (error.userInfo[AFNetworkingOperationFailingURLResponseDataErrorKey]) {
            NSData *errorData = error.userInfo[AFNetworkingOperationFailingURLResponseDataErrorKey];
            NSDictionary *errorDict = [NSJSONSerialization JSONObjectWithData:errorData options:0 error:nil];
            
            NSLog(@"❌ 服务器错误响应: %@", errorDict);
            
            // 尝试多种可能的错误信息字段
            if (errorDict[@"message"]) {
                errorMessage = errorDict[@"message"];
            } else if (errorDict[@"error"]) {
                errorMessage = errorDict[@"error"];
            } else if (errorDict[@"msg"]) {
                errorMessage = errorDict[@"msg"];
            }
        } else {
            // 网络错误
            errorMessage = [NSString stringWithFormat:@"网络请求失败: %@", error.localizedDescription];
        }
        
        // 回调失败
        if (completion) {
            completion(NO, errorMessage);
        }
    }];
}

- (void)saveLoginStateWithUsername:(NSString *)username {
    _isLoggedIn = YES;
    _currentUsername = username;
    
    // 持久化保存
    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:kUserLoggedInKey];
    [[NSUserDefaults standardUserDefaults] setObject:username forKey:kUserUsernameKey];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

- (void)logout {
    _isLoggedIn = NO;
    
    // 清除持久化数据
    [[NSUserDefaults standardUserDefaults] setBool:NO forKey:kUserLoggedInKey];
    [[NSUserDefaults standardUserDefaults] synchronize];
    
    NSLog(@"✅ 用户已登出");
}

@end