//
//  RQVoiceManager.m
//  YJZS
//
//  Created by 张嵘 on 2022/2/25.
//

#import "RQVoiceManager.h"
#import <AVFoundation/AVFoundation.h>

static NSString *is_voiceSwitch = nil;

/// 语音开关
static NSString * const RQVoiceSwitchKey = @"RQApplicationAppStoreFormalSettingKey";

static RQVoiceManager *manger = nil;
static dispatch_once_t onceToken;
@interface RQVoiceManager () <AVSpeechSynthesizerDelegate>
@property (nonatomic, readwrite, strong) AVSpeechSynthesizer *avSpeechSynthesizer;
@property (nonatomic, readwrite, strong) AVSpeechUtterance *avSpeechUtterance;
@property (nonatomic, readwrite, strong) AVSpeechSynthesisVoice *avSpeechSynthesisVoice;

@property (nonatomic, readwrite, assign) BOOL voiceSwitch;

@end

@implementation RQVoiceManager
#pragma mark - SystemMethod

+ (RQVoiceManager *)sharedManager {
    dispatch_once(&onceToken, ^{
        manger = [[self alloc] init];
    });
    return manger;
}

- (instancetype)init {
    self = [super init];
    if (self) {
    
    }
    return self;
}


- (void)playString:(NSString *)str {
    _avSpeechUtterance = [[AVSpeechUtterance alloc] initWithString:str];
    //设置语速,语速介于AVSpeechUtteranceMaximumSpeechRate和AVSpeechUtteranceMinimumSpeechRate之间
    //AVSpeechUtteranceMaximumSpeechRate
    //AVSpeechUtteranceMinimumSpeechRate
    //AVSpeechUtteranceDefaultSpeechRate
    _avSpeechUtterance.rate = 0.5;
    
    //设置音高,[0.5 - 2] 默认 = 1
    //AVSpeechUtteranceMaximumSpeechRate
    //AVSpeechUtteranceMinimumSpeechRate
    //AVSpeechUtteranceDefaultSpeechRate
    _avSpeechUtterance.pitchMultiplier = 1;
    
    //设置音量,[0-1] 默认 = 1
    _avSpeechUtterance.volume = 1;
    
    //读一段前的停顿时间
    _avSpeechUtterance.preUtteranceDelay = 1;
    //读完一段后的停顿时间
    _avSpeechUtterance.postUtteranceDelay = 1;
    //设置声音,是AVSpeechSynthesisVoice对象
    _avSpeechUtterance.voice = self.avSpeechSynthesisVoice;
    //开始朗读
    if (self.voiceSwitch) {
        [self.avSpeechSynthesizer speakUtterance:self.avSpeechUtterance];
    }
}

#pragma mark - AVSpeechSynthesizerDelegate
//已经开始
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didStartSpeechUtterance:(AVSpeechUtterance *)utterance{
    
    
}
//已经说完
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didFinishSpeechUtterance:(AVSpeechUtterance *)utterance{
    
    //如果朗读要循环朗读，可以在这里再次调用朗读方法
    //[_avSpeaker speakUtterance:utterance];
}
//已经暂停
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didPauseSpeechUtterance:(AVSpeechUtterance *)utterance{
    
}
//已经继续说话
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didContinueSpeechUtterance:(AVSpeechUtterance *)utterance{
    
}
//已经取消说话
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didCancelSpeechUtterance:(AVSpeechUtterance *)utterance{
    
}
//将要说某段话
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer willSpeakRangeOfSpeechString:(NSRange)characterRange utterance:(AVSpeechUtterance *)utterance{
    
}

#pragma mark - LazyLoad
- (AVSpeechSynthesizer *)avSpeechSynthesizer {
    // 初始化语音合成器
    if (!_avSpeechSynthesizer) {
        _avSpeechSynthesizer = [[AVSpeechSynthesizer alloc] init];
        _avSpeechSynthesizer.delegate = self;
    }
    return _avSpeechSynthesizer;
}

- (AVSpeechSynthesisVoice *)avSpeechSynthesisVoice {
    //AVSpeechSynthesisVoice定义了一系列的声音, 主要是不同的语言和地区.
    //voiceWithLanguage: 根据制定的语言, 获得一个声音.
    //speechVoices: 获得当前设备支持的声音
    //currentLanguageCode: 获得当前声音的语言字符串, 比如”ZH-cn”
    //language: 获得当前的语言
    //通过特定的语言获得声音
    if (!_avSpeechSynthesisVoice) {
        //通过voicce标示获得声音
        //_avSpeechSynthesisVoice = [AVSpeechSynthesisVoice voiceWithIdentifier:AVSpeechSynthesisVoiceIdentifierAlex];
        _avSpeechSynthesisVoice = [AVSpeechSynthesisVoice voiceWithLanguage:@"zh-CN"];
    }
    return _avSpeechSynthesisVoice;
}

- (void)setVoiceSwitch:(BOOL)voiceSwitch {
    is_voiceSwitch = voiceSwitch? @"1" : @"0";
    [[NSUserDefaults standardUserDefaults] setObject:is_voiceSwitch forKey:RQVoiceSwitchKey];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

- (BOOL)voiceSwitch {
    is_voiceSwitch = [[NSUserDefaults standardUserDefaults] objectForKey:RQVoiceSwitchKey];
    is_voiceSwitch = [is_voiceSwitch rq_stringValueExtension];
    return (is_voiceSwitch.integerValue == 1);
}

@end