//
//  KBSearchBarView.m
//  keyBoard
//
//  顶部搜索栏封装。
//

#import "KBSearchBarView.h"

@interface KBSearchBarView () <UITextFieldDelegate>
@property (nonatomic, strong) UIView *bgView;        // 圆角背景
@property (nonatomic, strong, readwrite) UITextField *textField; // 输入框
@property (nonatomic, strong) UIButton *searchButton; // 右侧搜索按钮
@end

@implementation KBSearchBarView

- (instancetype)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        [self setupUI];
    }
    return self;
}

- (void)setupUI {
    // 添加子视图
    [self addSubview:self.bgView];
    [self.bgView addSubview:self.textField];
    [self.bgView addSubview:self.searchButton];

    // layout - Masonry
    [self.bgView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self); // 高度由外部容器决定
    }];

    [self.searchButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerY.equalTo(self.bgView);
        make.right.equalTo(self.bgView).offset(-8);
        make.width.mas_equalTo(84);
        make.height.mas_equalTo(32);
    }];

    [self.textField mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.bgView).offset(12);
        make.centerY.equalTo(self.bgView);
        make.right.equalTo(self.searchButton.mas_left).offset(-8);
        make.height.mas_equalTo(30);
    }];
    
    self.bgView.layer.borderWidth = 1;
    self.bgView.layer.borderColor = [UIColor colorWithHex:0xE6E6E6].CGColor;
}

#pragma mark - Action

- (void)searchButtonTapped {
    NSString *kw = self.textField.text ?: @"";
    if (self.onSearch) { self.onSearch(kw); }
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    [textField resignFirstResponder];
    if (self.onSearch) { self.onSearch(textField.text ?: @""); }
    return YES;
}

- (void)updateKeyword:(NSString *)keyword {
    self.textField.text = keyword ?: @"";
}

#pragma mark - Lazy

- (UIView *)bgView {
    if (!_bgView) {
        _bgView = [[UIView alloc] init];
        // 淡灰色背景 + 圆角
        _bgView.backgroundColor = [UIColor colorWithWhite:0.95 alpha:1.0];
        CGFloat radius = self.bgCornerRadius > 0 ? self.bgCornerRadius : 20.0;
        _bgView.layer.cornerRadius = radius;
        _bgView.layer.masksToBounds = YES;
    }
    return _bgView;
}

- (UITextField *)textField {
    if (!_textField) {
        _textField = [[UITextField alloc] init];
        _textField.delegate = self;
        _textField.font = [UIFont systemFontOfSize:15];
        _textField.textColor = [UIColor colorWithHex:0x1B1F1A];
        _textField.clearButtonMode = UITextFieldViewModeWhileEditing;
        _textField.returnKeyType = UIReturnKeySearch;
        _textField.placeholder = @"Themes"; // 默认占位

        // 左侧占位图标
        UIView *pad = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 8, 8)];
        _textField.leftView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 6, 1)];
        _textField.leftViewMode = UITextFieldViewModeAlways;
        (void)pad; // 保留变量避免未使用告警
    }
    return _textField;
}

- (UIButton *)searchButton {
    if (!_searchButton) {
        _searchButton = [UIButton buttonWithType:UIButtonTypeSystem];
        _searchButton.titleLabel.font = [UIFont systemFontOfSize:16 weight:UIFontWeightSemibold];
        [_searchButton setTitle:@"Search" forState:UIControlStateNormal];
        // 绿色样式
        [_searchButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        _searchButton.backgroundColor = [UIColor colorWithRed:0.15 green:0.72 blue:0.62 alpha:1.0];
        _searchButton.layer.cornerRadius = 16;
        _searchButton.layer.masksToBounds = YES;
        [_searchButton addTarget:self action:@selector(searchButtonTapped) forControlEvents:UIControlEventTouchUpInside];
    }
    return _searchButton;
}

#pragma mark - Public

- (void)setPlaceholder:(NSString *)placeholder {
    _placeholder = [placeholder copy];
    self.textField.placeholder = placeholder;
}

- (void)setBgCornerRadius:(CGFloat)bgCornerRadius {
    _bgCornerRadius = bgCornerRadius;
    // 如果 bgView 已创建，立即更新圆角
    if (_bgView) {
        _bgView.layer.cornerRadius = bgCornerRadius;
    }
}

@end