//
//  KBVoiceInputBar.m
//  keyBoard
//
//  Created by Kiro on 2026/1/26.
//

#import "KBVoiceInputBar.h"
#import "KBAiRecordButton.h"
#import <Masonry/Masonry.h>

@interface KBVoiceInputBar () <KBAiRecordButtonDelegate>

/// 状态标签
@property (nonatomic, strong) UILabel *statusLabel;

/// 录音按钮
@property (nonatomic, strong) KBAiRecordButton *recordButton;

/// 输入区域容器
@property (nonatomic, strong) UIView *inputContainer;

/// 文字输入视图
@property (nonatomic, strong) UIView *textInputView;
@property (nonatomic, strong) UIButton *textCenterButton;

/// 语音输入视图
@property (nonatomic, strong) UIView *voiceInputView;
@property (nonatomic, strong) UILabel *voiceCenterLabel;

/// 左侧切换按钮（麦克风/键盘共用）
@property (nonatomic, strong) UIButton *toggleIconButton;

/// 录音中视图
@property (nonatomic, strong) UIView *recordingView;
@property (nonatomic, strong) UIImageView *recordingCenterIconView;

/// 取消视图
@property (nonatomic, strong) UIView *cancelView;
@property (nonatomic, strong) UILabel *cancelLabel;

/// 隐藏输入框（用于弹起键盘）
@property (nonatomic, strong) UITextField *hiddenTextField;

/// 是否正在录音
@property (nonatomic, assign) BOOL isRecording;

@end

@implementation KBVoiceInputBar

#pragma mark - Lifecycle

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

- (instancetype)initWithCoder:(NSCoder *)coder {
    if (self = [super initWithCoder:coder]) {
        [self setupUI];
    }
    return self;
}

#pragma mark - 1：控件初始化

- (void)setupUI {
    self.backgroundColor = [UIColor clearColor];
    self.enabled = YES;
    self.isRecording = NO;
    self.inputMode = KBVoiceInputBarModeVoice;
    self.inputState = KBVoiceInputBarStateText;
    
    // 状态标签
    [self addSubview:self.statusLabel];
    [self.statusLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self).offset(16);
        make.left.equalTo(self).offset(20);
        make.right.equalTo(self).offset(-20);
        make.height.mas_equalTo(20);
    }];
    
    // 输入区域容器
    [self addSubview:self.inputContainer];
    [self.inputContainer mas_makeConstraints:^(MASConstraintMaker *make) {
//        make.top.equalTo(self.statusLabel.mas_bottom).offset(12);
        make.left.equalTo(self).offset(20);
        make.right.equalTo(self).offset(-20);
        make.height.mas_equalTo(50);
        make.bottom.lessThanOrEqualTo(self).offset(-10);
    }];

    UILongPressGestureRecognizer *longPress =
        [[UILongPressGestureRecognizer alloc] initWithTarget:self
                                                      action:@selector(handleVoiceLongPress:)];
    longPress.minimumPressDuration = 0.05;
    longPress.cancelsTouchesInView = NO;
    [self.inputContainer addGestureRecognizer:longPress];
    
    // 文字输入视图
    [self.inputContainer addSubview:self.textInputView];
    [self.textInputView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self.inputContainer);
    }];
    
    [self.inputContainer addSubview:self.toggleIconButton];
    [self.toggleIconButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.textInputView).offset(16);
        make.centerY.equalTo(self.textInputView);
        make.width.height.mas_equalTo(24);
    }];
    
    [self.textInputView addSubview:self.textCenterButton];
    [self.textCenterButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.toggleIconButton.mas_right).offset(12);
        make.right.equalTo(self.textInputView).offset(-16);
        make.centerY.equalTo(self.textInputView);
        make.height.mas_equalTo(30);
    }];
    
    // 语音输入视图
    [self.inputContainer addSubview:self.voiceInputView];
    [self.voiceInputView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self.inputContainer);
    }];
    
    [self.voiceInputView addSubview:self.voiceCenterLabel];
    [self.voiceCenterLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.toggleIconButton.mas_right).offset(12);
        make.right.equalTo(self.voiceInputView).offset(-16);
        make.centerY.equalTo(self.voiceInputView);
    }];
    
    // 录音中视图
    [self.inputContainer addSubview:self.recordingView];
    [self.recordingView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self.inputContainer);
    }];
    
    [self.recordingView addSubview:self.recordingCenterIconView];
    [self.recordingCenterIconView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.center.equalTo(self.recordingView);
        make.width.height.mas_equalTo(36);
    }];
    
    // 取消视图
    [self.inputContainer addSubview:self.cancelView];
    [self.cancelView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self.inputContainer);
    }];
    
    [self.cancelView addSubview:self.cancelLabel];
    [self.cancelLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.center.equalTo(self.cancelView);
    }];
    
    // 隐藏输入框（仅用于弹起键盘）
    [self addSubview:self.hiddenTextField];
    [self.hiddenTextField mas_makeConstraints:^(MASConstraintMaker *make) {
        make.width.height.mas_equalTo(1);
        make.left.top.equalTo(self);
    }];
    
    // 隐藏旧的录音按钮和状态标签
    self.statusLabel.hidden = YES;

    // 统一设置初始状态
    self.inputState = KBVoiceInputBarStateText;
}

#pragma mark - Setter

- (void)setStatusText:(NSString *)statusText {
    _statusText = [statusText copy];
    self.statusLabel.text = statusText;
    [self updateCenterTextIfNeeded];
}

- (void)setEnabled:(BOOL)enabled {
    _enabled = enabled;
    self.recordButton.userInteractionEnabled = enabled;
    self.recordButton.alpha = enabled ? 1.0 : 0.5;
    self.inputContainer.userInteractionEnabled = enabled;
    self.inputContainer.alpha = enabled ? 1.0 : 0.5;
}

- (void)setRecording:(BOOL)recording {
    _isRecording = recording;
    self.recordButton.state = recording ? KBAiRecordButtonStateRecording : KBAiRecordButtonStateNormal;
    if (recording) {
        self.inputState = KBVoiceInputBarStateRecording;
    } else if (self.inputState == KBVoiceInputBarStateRecording) {
        self.inputState = KBVoiceInputBarStateVoice;
    }
}

- (void)setInputMode:(KBVoiceInputBarMode)inputMode {
    _inputMode = inputMode;
    if (inputMode == KBVoiceInputBarModeText) {
        [self.toggleIconButton setImage:[UIImage imageNamed:@"ai_maikefeng_icon"]
                               forState:UIControlStateNormal];
    } else {
        [self.toggleIconButton setImage:[UIImage imageNamed:@"ai_jianpan_icon"]
                               forState:UIControlStateNormal];
    }
}

- (void)setInputState:(KBVoiceInputBarState)inputState {
    _inputState = inputState;
    self.textInputView.hidden = (inputState != KBVoiceInputBarStateText);
    self.voiceInputView.hidden = (inputState != KBVoiceInputBarStateVoice);
    self.recordingView.hidden = (inputState != KBVoiceInputBarStateRecording);
    self.cancelView.hidden = (inputState != KBVoiceInputBarStateCancel);
    self.toggleIconButton.hidden = (inputState == KBVoiceInputBarStateRecording ||
                                    inputState == KBVoiceInputBarStateCancel);
    if (inputState == KBVoiceInputBarStateText) {
        self.inputMode = KBVoiceInputBarModeText;
    } else if (inputState == KBVoiceInputBarStateVoice) {
        self.inputMode = KBVoiceInputBarModeVoice;
    }
    if (!self.toggleIconButton.hidden) {
        [self.inputContainer bringSubviewToFront:self.toggleIconButton];
    }
    [self updateCenterTextIfNeeded];
}

#pragma mark - Public Methods

- (void)updateVolumeRMS:(float)rms {
    [self.recordButton updateVolumeRMS:rms];
}

#pragma mark - KBAiRecordButtonDelegate

- (void)recordButtonDidBeginPress:(KBAiRecordButton *)button {
    if (!self.enabled) {
        return;
    }
    
    self.isRecording = YES;
    
    if ([self.delegate respondsToSelector:@selector(voiceInputBarDidBeginRecording:)]) {
        [self.delegate voiceInputBarDidBeginRecording:self];
    }
}

- (void)recordButtonDidEndPress:(KBAiRecordButton *)button {
    self.isRecording = NO;
    
    if ([self.delegate respondsToSelector:@selector(voiceInputBarDidEndRecording:)]) {
        [self.delegate voiceInputBarDidEndRecording:self];
    }
}

- (void)recordButtonDidCancelPress:(KBAiRecordButton *)button {
    self.isRecording = NO;
    
    if ([self.delegate respondsToSelector:@selector(voiceInputBarDidCancelRecording:)]) {
        [self.delegate voiceInputBarDidCancelRecording:self];
    }
}

#pragma mark - Lazy Load

- (UILabel *)statusLabel {
    if (!_statusLabel) {
        _statusLabel = [[UILabel alloc] init];
        _statusLabel.text = @"按住按钮开始对话";
        _statusLabel.font = [UIFont systemFontOfSize:14];
        _statusLabel.textColor = [UIColor secondaryLabelColor];
        _statusLabel.textAlignment = NSTextAlignmentCenter;
    }
    return _statusLabel;
}

- (KBAiRecordButton *)recordButton {
    if (!_recordButton) {
        _recordButton = [[KBAiRecordButton alloc] init];
        _recordButton.delegate = self;
        _recordButton.normalTitle = @"按住说话";
        _recordButton.recordingTitle = @"松开结束";
        _recordButton.normalIconImage = [UIImage imageNamed:@"ai_jianpan_icon"];
        _recordButton.recordingIconImage = [UIImage imageNamed:@"ai_luyining_icon"];
        _recordButton.hidden = YES;
    }
    return _recordButton;
}

- (UIView *)inputContainer {
    if (!_inputContainer) {
        _inputContainer = [[UIView alloc] init];
        _inputContainer.clipsToBounds = YES;
        _inputContainer.layer.cornerRadius = 25;
        _inputContainer.backgroundColor = [UIColor clearColor];
    }
    return _inputContainer;
}

- (UIView *)textInputView {
    if (!_textInputView) {
        _textInputView = [[UIView alloc] init];
        _textInputView.backgroundColor = [[UIColor whiteColor] colorWithAlphaComponent:0.7];
    }
    return _textInputView;
}

- (UIButton *)textCenterButton {
    if (!_textCenterButton) {
        _textCenterButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [_textCenterButton setTitle:@"发送一个消息给她" forState:UIControlStateNormal];
        _textCenterButton.titleLabel.font = [UIFont systemFontOfSize:16 weight:UIFontWeightMedium];
        [_textCenterButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        _textCenterButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
        [_textCenterButton addTarget:self
                              action:@selector(handleTextCenterTap)
                    forControlEvents:UIControlEventTouchUpInside];
    }
    return _textCenterButton;
}

- (UIView *)voiceInputView {
    if (!_voiceInputView) {
        _voiceInputView = [[UIView alloc] init];
        _voiceInputView.backgroundColor = [[UIColor whiteColor] colorWithAlphaComponent:0.7];
    }
    return _voiceInputView;
}

- (UILabel *)voiceCenterLabel {
    if (!_voiceCenterLabel) {
        _voiceCenterLabel = [[UILabel alloc] init];
        _voiceCenterLabel.text = @"按住说话";
        _voiceCenterLabel.font = [UIFont systemFontOfSize:16 weight:UIFontWeightMedium];
        _voiceCenterLabel.textColor = [UIColor whiteColor];
        _voiceCenterLabel.textAlignment = NSTextAlignmentCenter;
    }
    return _voiceCenterLabel;
}

- (UIButton *)toggleIconButton {
    if (!_toggleIconButton) {
        _toggleIconButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [_toggleIconButton setImage:[UIImage imageNamed:@"ai_maikefeng_icon"]
                           forState:UIControlStateNormal];
        [_toggleIconButton addTarget:self
                              action:@selector(handleToggleIconTap)
                    forControlEvents:UIControlEventTouchUpInside];
        _toggleIconButton.exclusiveTouch = YES;
    }
    return _toggleIconButton;
}

- (UIView *)recordingView {
    if (!_recordingView) {
        _recordingView = [[UIView alloc] init];
        _recordingView.backgroundColor = [UIColor colorWithWhite:0 alpha:0.6];
    }
    return _recordingView;
}

- (UIImageView *)recordingCenterIconView {
    if (!_recordingCenterIconView) {
        _recordingCenterIconView = [[UIImageView alloc] init];
        _recordingCenterIconView.image = [UIImage imageNamed:@"ai_luyining_icon"];
        _recordingCenterIconView.contentMode = UIViewContentModeScaleAspectFit;
    }
    return _recordingCenterIconView;
}

- (UIView *)cancelView {
    if (!_cancelView) {
        _cancelView = [[UIView alloc] init];
        _cancelView.backgroundColor = [UIColor colorWithRed:0.75 green:0.3 blue:0.3 alpha:1.0];
    }
    return _cancelView;
}

- (UILabel *)cancelLabel {
    if (!_cancelLabel) {
        _cancelLabel = [[UILabel alloc] init];
        _cancelLabel.text = @"Release To Cancel";
        _cancelLabel.font = [UIFont systemFontOfSize:16 weight:UIFontWeightMedium];
        _cancelLabel.textColor = [UIColor whiteColor];
    }
    return _cancelLabel;
}

- (UITextField *)hiddenTextField {
    if (!_hiddenTextField) {
        _hiddenTextField = [[UITextField alloc] init];
        _hiddenTextField.hidden = YES;
    }
    return _hiddenTextField;
}

#pragma mark - Actions

- (void)handleToggleIconTap {
    if (self.inputState == KBVoiceInputBarStateText) {
        self.inputState = KBVoiceInputBarStateVoice;
        [self endEditing:YES];
    } else {
        self.inputState = KBVoiceInputBarStateText;
    }
}

- (void)handleTextCenterTap {
    // 文本模式点击时，触发回调让 VC 显示文本输入框
    if (self.onTextSend) {
        self.onTextSend(nil);
    }
}

- (void)handleVoiceLongPress:(UILongPressGestureRecognizer *)gesture {
    if (self.inputState != KBVoiceInputBarStateVoice &&
        self.inputState != KBVoiceInputBarStateRecording &&
        self.inputState != KBVoiceInputBarStateCancel) {
        return;
    }
    
    CGPoint location = [gesture locationInView:self.inputContainer];
    BOOL isInside = CGRectContainsPoint(self.inputContainer.bounds, location);
    CGPoint iconPoint = [gesture locationInView:self.toggleIconButton];
    BOOL isOnToggleIcon = CGRectContainsPoint(self.toggleIconButton.bounds, iconPoint);
    if (isOnToggleIcon) {
        return;
    }
    
    switch (gesture.state) {
        case UIGestureRecognizerStateBegan: {
            if (self.inputState != KBVoiceInputBarStateVoice) {
                return;
            }
            self.inputState = KBVoiceInputBarStateRecording;
            if ([self.delegate respondsToSelector:@selector(voiceInputBarDidBeginRecording:)]) {
                [self.delegate voiceInputBarDidBeginRecording:self];
            }
        } break;
        case UIGestureRecognizerStateChanged: {
            if (isInside) {
                self.inputState = KBVoiceInputBarStateRecording;
            } else {
                self.inputState = KBVoiceInputBarStateCancel;
            }
        } break;
        case UIGestureRecognizerStateEnded: {
            if (isInside) {
                if ([self.delegate respondsToSelector:@selector(voiceInputBarDidEndRecording:)]) {
                    [self.delegate voiceInputBarDidEndRecording:self];
                }
            } else {
                if ([self.delegate respondsToSelector:@selector(voiceInputBarDidCancelRecording:)]) {
                    [self.delegate voiceInputBarDidCancelRecording:self];
                }
            }
            self.inputState = KBVoiceInputBarStateVoice;
        } break;
        case UIGestureRecognizerStateCancelled:
        case UIGestureRecognizerStateFailed: {
            if ([self.delegate respondsToSelector:@selector(voiceInputBarDidCancelRecording:)]) {
                [self.delegate voiceInputBarDidCancelRecording:self];
            }
            self.inputState = KBVoiceInputBarStateVoice;
        } break;
        default:
            break;
    }
}

- (void)updateCenterTextIfNeeded {
    if (self.inputState == KBVoiceInputBarStateText) {
        [self.textCenterButton setTitle:@"发送一个消息给她" forState:UIControlStateNormal];
    } else if (self.inputState == KBVoiceInputBarStateVoice) {
        self.voiceCenterLabel.text = @"按住说话";
    }
}

@end