//
//  KeyboardViewController.m
//  CustomKeyboard
//
//  Created by Mac on 2025/10/27.
//

#import "KeyboardViewController.h"
#import "KBToolBar.h"
#import "KBKeyboardView.h"
#import "KBKey.h"

static CGFloat KEYBOARDHEIGHT = 256;

@interface KeyboardViewController () <KBToolBarDelegate, KBKeyboardViewDelegate>
@property (nonatomic, strong) UIButton *nextKeyboardButton; // 系统“下一个键盘”按钮（可选）
@property (nonatomic, strong) KBToolBar *topBar;
@property (nonatomic, strong) KBKeyboardView *keyboardView;
@end

@implementation KeyboardViewController

- (void)updateViewConstraints {
    [super updateViewConstraints];
    
    // 可在此添加自定义尺寸约束
}

- (void)viewDidLoad {
    [super viewDidLoad];
//    
//    // Perform custom UI setup here
//    self.nextKeyboardButton = [UIButton buttonWithType:UIButtonTypeSystem];
//    
//    [self.nextKeyboardButton setTitle:NSLocalizedString(@"Next Keyboard", @"Title for 'Next Keyboard' button") forState:UIControlStateNormal];
//    [self.nextKeyboardButton sizeToFit];
//    self.nextKeyboardButton.translatesAutoresizingMaskIntoConstraints = NO;
//    
//    [self.nextKeyboardButton addTarget:self action:@selector(handleInputModeListFromView:withEvent:) forControlEvents:UIControlEventAllTouchEvents];
//    
//    [self.view addSubview:self.nextKeyboardButton];
//    
//    [self.nextKeyboardButton.leftAnchor constraintEqualToAnchor:self.view.leftAnchor].active = YES;
//    [self.nextKeyboardButton.bottomAnchor constraintEqualToAnchor:self.view.bottomAnchor].active = YES;
    
    [self setupUI];
}


- (void)setupUI {
//    self.view.translatesAutoresizingMaskIntoConstraints = NO;
    // 固定键盘整体高度
    [self.view.heightAnchor constraintEqualToConstant:KEYBOARDHEIGHT].active = YES;

    // 顶部栏
    self.topBar = [[KBToolBar alloc] init];
    self.topBar.delegate = self;
    [self.view addSubview:self.topBar];
    [self.topBar mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.right.equalTo(self.view);
        make.top.equalTo(self.view.mas_top).offset(6);
        make.height.mas_equalTo(40);
    }];

    // 键盘区域
    self.keyboardView = [[KBKeyboardView alloc] init];
    self.keyboardView.delegate = self;
    [self.view addSubview:self.keyboardView];
    [self.keyboardView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.right.equalTo(self.view);
        make.top.equalTo(self.topBar.mas_bottom).offset(4);
        make.bottom.equalTo(self.view.mas_bottom).offset(-4);
    }];
}


- (void)viewWillLayoutSubviews
{
    self.nextKeyboardButton.hidden = !self.needsInputModeSwitchKey;
    [super viewWillLayoutSubviews];
}

- (void)textWillChange:(id<UITextInput>)textInput {
    // 文档内容即将变化，可在此做准备
}

- (void)textDidChange:(id<UITextInput>)textInput {
    // 文档内容刚发生变化，环境已更新
    
    UIColor *textColor = nil;
    if (self.textDocumentProxy.keyboardAppearance == UIKeyboardAppearanceDark) {
        textColor = [UIColor whiteColor];
    } else {
        textColor = [UIColor blackColor];
    }
    [self.nextKeyboardButton setTitleColor:textColor forState:UIControlStateNormal];
}

#pragma mark - KBToolBarDelegate

- (void)toolBar:(KBToolBar *)toolBar didTapActionAtIndex:(NSInteger)index {
    // 可根据业务透传或处理。示例：插入占位标记 [A1]..[A4]
    NSString *placeholder = [NSString stringWithFormat:@"[A%ld]", (long)index+1];
    [self.textDocumentProxy insertText:placeholder];
}

- (void)toolBarDidTapSettings:(KBToolBar *)toolBar {
    // 通常可通过 openURL 或宿主处理打开设置页。
    // 这里示例仅插入一个标记。
    [self.textDocumentProxy insertText:@"[settings]"];
}

#pragma mark - KBKeyboardViewDelegate

- (void)keyboardView:(KBKeyboardView *)keyboard didTapKey:(KBKey *)key {
    switch (key.type) {
        case KBKeyTypeCharacter:
            [self.textDocumentProxy insertText:key.output ?: key.title ?: @""]; break;
        case KBKeyTypeBackspace:
            [self.textDocumentProxy deleteBackward]; break;
        case KBKeyTypeSpace:
            [self.textDocumentProxy insertText:@" "]; break;
        case KBKeyTypeReturn:
            [self.textDocumentProxy insertText:@"\n"]; break;
        case KBKeyTypeModeChange: {
            // 切换 字母 <-> 数字 布局
            keyboard.layoutStyle = (keyboard.layoutStyle == KBKeyboardLayoutStyleLetters) ? KBKeyboardLayoutStyleNumbers : KBKeyboardLayoutStyleLetters;
            [keyboard reloadKeys];
        } break;
        case KBKeyTypeGlobe:
            [self advanceToNextInputMode]; break;
        case KBKeyTypeCustom:
            // 自定义占位：切换语言或其它操作
            [self.textDocumentProxy insertText:@"[lang]"]; break;
        case KBKeyTypeShift:
            // Shift 已在 KBKeyboardView 内部处理
            break;
    }
}

@end