//
//  GuestHelper.m
//  AICity
//
//  游客模式管理实现
//

#import "GuestHelper.h"
#import "UserModel.h"
#import "LoginViewController.h"

@implementation GuestHelper

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

- (BOOL)checkLoginWithViewController:(UIViewController *)viewController
                              action:(void (^)(void))action {
    // 检查登录状态
    UserModel *user = [UserModel shareInstance];
    
    if (user.token.length > 0) {
        // 已登录，直接执行操作
        if (action) {
            action();
        }
        return YES;
    } else {
        // 未登录，弹出提示
        NSLog(@"[GuestHelper] User not logged in, showing login prompt");
        [self showLoginAlertWithViewController:viewController action:action];
        return NO;
    }
}

- (BOOL)isLoggedIn {
    UserModel *user = [UserModel shareInstance];
    return  user.token.length > 0;
}

- (void)showLoginAlertWithViewController:(UIViewController *)viewController
                                  action:(void (^)(void))action {
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提示"
                                                                   message:@"请先登录后再进行此操作"
                                                            preferredStyle:UIAlertControllerStyleAlert];
    
    // "去登录" 按钮
    UIAlertAction *loginAction = [UIAlertAction actionWithTitle:@"去登录"
                                                          style:UIAlertActionStyleDefault
                                                        handler:^(UIAlertAction * _Nonnull alertAction) {
        [self navigateToLoginWithViewController:viewController action:action];
    }];
    
    // "取消" 按钮
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消"
                                                           style:UIAlertActionStyleCancel
                                                         handler:nil];
    
    [alert addAction:loginAction];
    [alert addAction:cancelAction];
    
    [viewController presentViewController:alert animated:YES completion:nil];
}

- (void)navigateToLoginWithViewController:(UIViewController *)viewController
                                   action:(void (^)(void))action {
    // 跳转到登录页
    LoginViewController *loginVC = [[LoginViewController alloc] init];
    
    // 登录成功后的回调
    __weak typeof(viewController) weakVC = viewController;
    loginVC.loginSuccessBlock = ^{
        NSLog(@"[GuestHelper] Login success, executing action");
        
        // 关闭登录页
        [weakVC dismissViewControllerAnimated:YES completion:^{
            // 执行原操作
            if (action) {
                action();
            }
        }];
    };
    
    // Present 登录页
    UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:loginVC];
    navController.modalPresentationStyle = UIModalPresentationFullScreen;
    [viewController presentViewController:navController animated:YES completion:nil];
}

@end