//
//  KBLangTestVC.m
//  多语言测试页：点击切换语言（在 zh-Hans 与 en 之间），演示运行时生效。
//

#import "KBLangTestVC.h"

@interface KBLangTestVC ()
@property (nonatomic, strong) UILabel *label;
@property (nonatomic, strong) UIButton *toggleBtn;
@end

@implementation KBLangTestVC

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = UIColor.whiteColor;
    [self buildUI];
    [self refreshTexts];

    // 监听语言变更，实时刷新
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(refreshTexts) name:KBLocalizationDidChangeNotification object:nil];
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)buildUI {
    CGFloat w = UIScreen.mainScreen.bounds.size.width;

    self.label = [[UILabel alloc] initWithFrame:CGRectMake(24, 120, w - 48, 60)];
    self.label.textAlignment = NSTextAlignmentCenter;
    self.label.numberOfLines = 0;
    [self.view addSubview:self.label];

    self.toggleBtn = [UIButton buttonWithType:UIButtonTypeSystem];
    self.toggleBtn.frame = CGRectMake(40, CGRectGetMaxY(self.label.frame) + 24, w - 80, 48);
    self.toggleBtn.layer.cornerRadius = 8;
    self.toggleBtn.backgroundColor = [UIColor colorWithRed:0.22 green:0.49 blue:0.96 alpha:1];
    [self.toggleBtn setTitleColor:UIColor.whiteColor forState:UIControlStateNormal];
    [self.toggleBtn addTarget:self action:@selector(onToggle) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:self.toggleBtn];
}

- (void)refreshTexts {
    self.title = KBLocalized(@"lang_test_title");
    NSString *code = [KBLocalizationManager shared].currentLanguageCode ?: @"";
    NSString *fmt = KBLocalized(@"current_lang");
    self.label.text = [NSString stringWithFormat:fmt.length ? fmt : @"当前：%@", code];
    [self.toggleBtn setTitle:KBLocalized(@"lang_toggle") forState:UIControlStateNormal];
}

- (void)onToggle {
    KBLocalizationManager *mgr = [KBLocalizationManager shared];
    NSString *next = [mgr.currentLanguageCode.lowercaseString hasPrefix:@"zh"] ? @"en" : @"zh-Hans";
    [mgr setCurrentLanguageCode:next persist:YES];
}

@end