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

#import "AVUserManager.h"
#import "AVApiService.h"

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

@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) {
        _isLoggedIn = [[NSUserDefaults standardUserDefaults] boolForKey:kUserLoggedInKey];
        _currentUsername = [[NSUserDefaults standardUserDefaults] stringForKey:kUserUsernameKey];
    }
    return self;
}

- (void)loginWithUsername:(NSString *)username
                 password:(NSString *)password
               completion:(void (^)(BOOL success, NSString * _Nullable errorMessage))completion {
    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;
    }

    [[AVApiService shared] loginWithUsername:username password:password
        success:^(id responseObject) {
            [self saveLoginStateWithUsername:username];
            if (completion) completion(YES, nil);
        }
        failure:^(NSError *error, NSString *serverMessage) {
            NSString *msg = serverMessage ?: [NSString stringWithFormat:@"网络请求失败: %@", error.localizedDescription];
            if (completion) completion(NO, msg);
        }];
}

- (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