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

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

@interface KBVoiceInputBar () <KBAiRecordButtonDelegate>

/// 毛玻璃背景容器
@property (nonatomic, strong) UIView *backgroundView;

/// 毛玻璃效果
@property (nonatomic, strong) UIVisualEffectView *blurEffectView;

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

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

/// 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;
    
    // 毛玻璃背景容器
    [self addSubview:self.backgroundView];
    [self.backgroundView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self);
    }];
    
    // 毛玻璃效果
    [self.backgroundView addSubview:self.blurEffectView];
    [self.blurEffectView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self.backgroundView);
    }];
    
    // 为 blurEffectView 创建透明度渐变 mask
    CAGradientLayer *maskLayer = [CAGradientLayer layer];
    maskLayer.startPoint = CGPointMake(0.5, 1); // 底部
    maskLayer.endPoint = CGPointMake(0.5, 0);   // 顶部
    maskLayer.colors = @[
        (__bridge id)[UIColor whiteColor].CGColor,  // 底部：完全不透明
        (__bridge id)[UIColor whiteColor].CGColor,  // 中间：完全不透明
        (__bridge id)[UIColor clearColor].CGColor   // 顶部：完全透明
    ];
    maskLayer.locations = @[@(0.0), @(0.5), @(1.0)];
    self.blurEffectView.layer.mask = maskLayer;
    
    // 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);
    }];
    
    // 录音按钮
    [self addSubview:self.recordButton];
    [self.recordButton 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(-16);
    }];
}

- (void)layoutSubviews {
    [super layoutSubviews];
    
    // 更新 mask 的 frame
    if (self.blurEffectView.layer.mask) {
        self.blurEffectView.layer.mask.frame = self.blurEffectView.bounds;
    }
}

#pragma mark - Setter

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

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

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

#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

- (UIView *)backgroundView {
    if (!_backgroundView) {
        _backgroundView = [[UIView alloc] init];
        _backgroundView.clipsToBounds = YES;
    }
    return _backgroundView;
}

- (UIVisualEffectView *)blurEffectView {
    if (!_blurEffectView) {
        UIBlurEffect *blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
        _blurEffectView = [[UIVisualEffectView alloc] initWithEffect:blurEffect];
    }
    return _blurEffectView;
}

- (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";
    }
    return _recordButton;
}

@end