//
//  KBGenderPickerPopView.m
//  keyBoard
//
//  Created by Codex on 2025/11/11.
//

@import UIKit;
#import "KBGenderPickerPopView.h"
#import <Masonry/Masonry.h>

@interface KBGenderPickerPopView () <UIPickerViewDelegate, UIPickerViewDataSource>

// 白底圆角卡片容器
@property (nonatomic, strong) UIView *cardView;
// 标题
@property (nonatomic, strong) UILabel *titleLabel;
// 右上角关闭（下拉箭头）
@property (nonatomic, strong) UIButton *closeButton;
// 选择器
@property (nonatomic, strong) UIPickerView *picker;
// 选中区域的上/下分隔线（模拟系统选择线）
@property (nonatomic, strong) UIView *lineTop;
@property (nonatomic, strong) UIView *lineBottom;
// 保存按钮
@property (nonatomic, strong) UIButton *saveButton;

@end

@implementation KBGenderPickerPopView

- (instancetype)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        self.backgroundColor = UIColor.clearColor;
        // 默认三项
        _items = @[
            @{ @"id": @"1", @"name": @"Male" },
            @{ @"id": @"2", @"name": @"Female" },
            @{ @"id": @"3", @"name": @"The Third Gender" },
        ];
        [self buildUI];
        [self makeConstraints];
    }
    return self;
}

#pragma mark - Public

- (void)setItems:(NSArray<NSDictionary *> *)items {
    _items = [items copy];
    [self.picker reloadAllComponents];
    [self syncSelection];
}

- (void)setSelectedId:(NSString *)selectedId {
    _selectedId = [selectedId copy];
    [self syncSelection];
}

- (void)syncSelection {
    // 找到选中 id 对应的行（避免 __block，可直接用 indexOfObjectPassingTest）
    NSInteger row = 0;
    if (self.selectedId.length > 0) {
        NSUInteger idx = [self.items indexOfObjectPassingTest:^BOOL(NSDictionary *obj, NSUInteger idx, BOOL *stop) {
            return [[obj objectForKey:@"id"] ?: @"" isEqualToString:self.selectedId];
        }];
        if (idx != NSNotFound) row = (NSInteger)idx;
    }
    if (row < (NSInteger)self.items.count) {
        [self.picker selectRow:row inComponent:0 animated:NO];
    }
    [self.picker reloadAllComponents];
}

#pragma mark - Actions

- (void)onTapClose { if (self.closeHandler) self.closeHandler(); }

- (void)onTapSave {
    NSInteger row = [self.picker selectedRowInComponent:0];
    if (row >= 0 && row < (NSInteger)self.items.count) {
        NSDictionary *sel = self.items[row];
        if (self.saveHandler) self.saveHandler(sel);
    }
}

#pragma mark - UI

- (void)buildUI {
    [self addSubview:self.cardView];
    [self.cardView addSubview:self.titleLabel];
    [self.cardView addSubview:self.closeButton];
    [self.cardView addSubview:self.picker];
    [self.cardView addSubview:self.lineTop];
    [self.cardView addSubview:self.lineBottom];
    [self.cardView addSubview:self.saveButton];
}

- (void)makeConstraints {
    [self.cardView mas_makeConstraints:^(MASConstraintMaker *make) { make.edges.equalTo(self); }];
    [self.titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.cardView).offset(20);
        make.top.equalTo(self.cardView).offset(18);
    }];
    [self.titleLabel setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical];
    [self.titleLabel setContentCompressionResistancePriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical];
    [self.closeButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerY.equalTo(self.titleLabel);
        make.right.equalTo(self.cardView).offset(-16);
        make.width.height.mas_equalTo(36);
    }];
    [self.picker mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.cardView).offset(10);
        make.right.equalTo(self.cardView).offset(-10);
        make.top.equalTo(self.titleLabel.mas_bottom).offset(6);
        make.bottom.equalTo(self.saveButton.mas_top).offset(0);
    }];
    // 选中区域分隔线放在 picker 上方
    CGFloat rowH = 48;
    [self.lineTop mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.right.equalTo(self.picker);
        make.centerY.equalTo(self.picker).offset(-rowH/2.0);
        make.height.mas_equalTo(1);
    }];
    [self.lineBottom mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.right.equalTo(self.picker);
        make.centerY.equalTo(self.picker).offset(rowH/2.0);
        make.height.mas_equalTo(1);
    }];
    [self.saveButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.cardView).offset(16);
        make.right.equalTo(self.cardView).offset(-16);
        make.bottom.equalTo(self.cardView).offset(-18);
        make.height.mas_equalTo(46);
    }];
}

#pragma mark - Picker

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView { return 1; }
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component { return self.items.count; }

- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component { return 48.0; }

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {
    UILabel *label = (UILabel *)view;
    if (![label isKindOfClass:UILabel.class]) {
        label = [[UILabel alloc] init];
        label.textAlignment = NSTextAlignmentCenter;
        label.font = [UIFont systemFontOfSize:20 weight:UIFontWeightSemibold];
    }
    NSString *name = self.items[row][@"name"] ?: @"";
    label.text = name;
    BOOL selected = (row == [pickerView selectedRowInComponent:0]);
    label.textColor = selected ? [UIColor colorWithRed:0.02 green:0.75 blue:0.67 alpha:1.0]
                               : [UIColor colorWithWhite:0.65 alpha:1.0];
    return label;
}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
    // 选中变化后刷新颜色
    [pickerView reloadAllComponents];
}

#pragma mark - Lazy UI

- (UIView *)cardView {
    if (!_cardView) {
        _cardView = [UIView new];
        _cardView.backgroundColor = UIColor.whiteColor;
        _cardView.layer.cornerRadius = 18.0; _cardView.layer.masksToBounds = YES;
    }
    return _cardView;
}

- (UILabel *)titleLabel {
    if (!_titleLabel) {
        _titleLabel = [UILabel new];
        _titleLabel.text = @"Modify Gender";
        _titleLabel.textColor = [UIColor blackColor];
        _titleLabel.font = [UIFont systemFontOfSize:22 weight:UIFontWeightBold];
    }
    return _titleLabel;
}

- (UIButton *)closeButton {
    if (!_closeButton) {
        _closeButton = [UIButton buttonWithType:UIButtonTypeCustom];
        _closeButton.backgroundColor = [UIColor colorWithWhite:1 alpha:0.95];
        _closeButton.layer.cornerRadius = 18.0; _closeButton.layer.masksToBounds = YES;
        UIImage *img = nil; if (@available(iOS 13.0, *)) img = [UIImage systemImageNamed:@"chevron.down"];
        [_closeButton setImage:img forState:UIControlStateNormal];
        if (!img) { [_closeButton setTitle:@"∨" forState:UIControlStateNormal]; }
        [_closeButton setTitleColor:[UIColor colorWithWhite:0.3 alpha:1] forState:UIControlStateNormal];
        _closeButton.tintColor = [UIColor colorWithWhite:0.3 alpha:1];
        [_closeButton addTarget:self action:@selector(onTapClose) forControlEvents:UIControlEventTouchUpInside];
    }
    return _closeButton;
}

- (UIPickerView *)picker {
    if (!_picker) {
        _picker = [[UIPickerView alloc] init];
        _picker.dataSource = self; _picker.delegate = self;
        _picker.backgroundColor = UIColor.clearColor;
    }
    return _picker;
}

- (UIView *)lineTop {
    if (!_lineTop) { _lineTop = [self makeLine]; }
    return _lineTop;
}
- (UIView *)lineBottom {
    if (!_lineBottom) { _lineBottom = [self makeLine]; }
    return _lineBottom;
}
- (UIView *)makeLine { UIView *v = [UIView new]; v.backgroundColor = [UIColor colorWithWhite:0.88 alpha:1.0]; return v; }

- (UIButton *)saveButton {
    if (!_saveButton) {
        _saveButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [_saveButton setTitle:@"Save" forState:UIControlStateNormal];
        [_saveButton setTitleColor:UIColor.whiteColor forState:UIControlStateNormal];
        _saveButton.titleLabel.font = [UIFont systemFontOfSize:20 weight:UIFontWeightSemibold];
        _saveButton.backgroundColor = [UIColor colorWithRed:0.02 green:0.75 blue:0.67 alpha:1.0];
        _saveButton.layer.cornerRadius = 23.0; _saveButton.layer.masksToBounds = YES;
        [_saveButton addTarget:self action:@selector(onTapSave) forControlEvents:UIControlEventTouchUpInside];
    }
    return _saveButton;
}

@end