mp_audio_manage/app/Services/DeepSeek/DeepSeekService.php

<?php

namespace App\Services\DeepSeek;

use App\Consts\ErrorConst;
use App\Facade\Site;
use App\Libs\Utils;
use GuzzleHttp\Client;
use DateTime;
use DateTimeZone;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Redis;
use OSS\Core\OssException;
use OSS\OssClient;

class DeepSeekService
{
    private $url;
    private $api_key;
    private $client;
    private $headers;

    public function __construct() {
        $this->url = 'https://api.deepseek.com/chat/completions';
        $this->api_key = env('DEEPSEEK_API_KEY');
        $this->headers = [
            'Authorization' => 'Bearer '.$this->api_key,
            'Content-Type'  => 'application/json; charset=UTF-8'
        ];
    }

    // 与推理模型对话
    public function chatWithReasoner($data) {
        $content = getProp($data, 'content');
        $model = getProp($data, 'model', 'r1');
        $model = $model == 'r1' ? 'deepseek-reasoner' : 'deepseek-chat';

        // 获取可选情感(根据音色可支持情感选)
        $timbre_emotion = DB::table('mp_timbres')->where('is_enabled', 1)->pluck('emotion')->toArray();
        $emotion_list = [];
        foreach ($timbre_emotion as $emotion) {
            $tmp = explode('，', $emotion);
            $emotion_list = array_merge($emotion_list, $tmp);
        }
        $emotion_list = array_unique($emotion_list);
        $emotion_str = implode('、', $emotion_list);

        // // 获取可选情感
        // $emotion_list = DB::table('mp_emotion_list')->where('is_enabled', 1)->select('emotion_name')->orderBy('id')->get()->pluck('emotion_name')->toArray();
        // $emotion_str = implode('、', $emotion_list);

        // 是否启用情感
        $enable_emotion = getProp($data, 'enable_emotion', 0);
        if ($enable_emotion) {
            $sys_content = "下面有一段小说文本，请帮我将文本中的每句话按从上到下的顺序拆分成角色不同的剧本文稿(不得更改上下文顺序和内容)，文稿形式严格按照“角色名(男、女、中性)：台词{情感}”输出，需要注意以下几点要求:
1.角色名后不要加入任何其他词语，只能加性别，在男、女或中性中选
2.非对话部分请全部用旁白角色代替,旁白的情感统一选择中性
3.情感必须在【{$emotion_str}】中选一个，不得使用其他词语";
        }else {
            $sys_content = "下面有一段小说文本，请帮我将文本中的每句话按从上到下的顺序拆分成角色不同的剧本文稿(不得更改上下文顺序和内容)，文稿形式严格按照“角色名(男、女、中性)：台词”输出，需要注意以下几点要求:
1.角色名后不要加入任何其他词语，只能加性别，在男、女或中性中选
2.非对话部分请全部用旁白角色代替,旁白的情感统一选择中性";
        }
        
        $messages = [
            [
                'role'      => 'system',
                'content'   => $sys_content
            ],
            [
                'role'      => 'user',
                'content'   => $content
            ]
        ];
        $post_data = [
            'model'                 => $model,     // R1模型: deepseek-reasoner V3模型: deepseek-chat
            'messages'              => $messages,
            'max_tokens'            => 8192,
            'temperature'           => 1,   // 采样温度，介于 0 和 2 之间。更高的值，如 0.8，会使输出更随机，而更低的值，如 0.2，会使其更加集中和确定。 我们通常建议可以更改这个值或者更改 top_p，但不建议同时对两者进行修改。
            // 'top_p'                 => 1,   // 作为调节采样温度的替代方案（<=1），模型会考虑前 top_p 概率的 token 的结果。所以 0.1 就意味着只有包括在最高 10% 概率中的 token 会被考虑。 我们通常建议修改这个值或者更改 temperature，但不建议同时对两者进行修改。
            'frequency_penalty'     => 0,   // 介于 -2.0 和 2.0 之间的数字。如果该值为正，那么新 token 会根据其在已有文本中的出现频率受到相应的惩罚，降低模型重复相同内容的可能性。
            'presence_penalty'      => 0,   // 介于 -2.0 和 2.0 之间的数字。如果该值为正，那么新 token 会根据其是否已在已有文本中出现受到相应的惩罚，从而增加模型谈论新主题的可能性。
            'response_format'       => [
                'type'  => 'text'           // 默认值text,回答的结果输出文字(非接口返回值是text,接口返回值还是json字串),还可选:json_object,输出json格式
            ],
            'stream'                => false  // 是否流式输出,如果设置为 True，将会以 SSE（server-sent events）的形式以流式发送消息增量。消息流以 data: [DONE] 结尾。
        ];

        $client = new Client(['timeout' => 1200, 'verify' => false]);
        $result = $client->post($this->url, ['json' => $post_data, 'headers' => $this->headers]);
        $response = $result->getBody()->getContents();
        $response_arr = json_decode($response, true);
        $update_data = [];
        $content = '';
        if (isset($response_arr['choices']) && count($response_arr['choices']) > 0) {
            $content = isset($response_arr['choices'][0]['message']['content']) ? $response_arr['choices'][0]['message']['content'] : '';
            $update_data = [
                'role'      => 'assistant',
                'content'   => $response_arr['choices'][0]['message']['content'],
                'usage'     => isset($response_arr['usage']) ? $response_arr['usage'] : []
            ];
        }

        // 处理获取到的剧本数据
        $script_content = handleScriptWords($content, $enable_emotion);
        $result = [
            'origin_content'    => $content,
            'roles'             => getProp($script_content, 'roles'),
            'words'             => getProp($script_content, 'words'),
        ];

        return $result;
    }

    public function resetParagraphAudio($data) {
        $bid = getProp($data, 'bid');
        $cid = getProp($data, 'cid');
        $version_id = getProp($data, 'version_id');
        
        if (!DB::table('mp_chapter_paragraph_audios')->where('bid', $bid)->where('cid', $cid)->where('version_id', $version_id)->value('id')) return true;
        return DB::table('mp_chapter_paragraph_audios')->where('bid', $bid)->where('cid', $cid)->where('version_id', $version_id)->update([
            'generate_status'   => '待制作',
            'updated_at'        => date('Y-m-d H:i:s')
        ]);
    }

    public function saveParagraphAudio($data) {
        $bid = getProp($data, 'bid');
        $cid = getProp($data, 'cid');
        $version_id = getProp($data, 'version_id');
        $sequence = getProp($data, 'sequence');
        $id = DB::table('mp_chapter_paragraph_audios')->where('bid', $bid)->where('cid', $cid)->where('version_id', $version_id)->where('sequence', $sequence)->value('id');
        // 获取所有情感
        $emotion_list = DB::table('mp_emotion_list')->where('is_enabled', 1)->pluck('emotion_name', 'emotion_code')->toArray();
        $emotion_list = array_flip($emotion_list);

        // 获取音色支持情感
        $timbre_emotion = DB::table('mp_timbres')->where('timbre_type', getProp($data, 'voice_type'))->value('emotion');
        $timbre_emotion = explode('，', $timbre_emotion);
        $emotion = getProp($data, 'emotion');
        if (!in_array($emotion, $timbre_emotion)) $emotion = '中性';
        $emotion_type = isset($emotion_list[$emotion]) ? $emotion_list[$emotion] : 'neutral';
        $list = [
            'bid'           => $bid,
            'cid'           => $cid,
            'version_id'    => $version_id,
            'sequence'      => $sequence,
            'role'          => getProp($data, 'role'),
            'gender'        => getProp($data, 'gender'),
            'text'          => trim(getProp($data, 'text')),
            'emotion'       => $emotion,
            'emotion_type'  => $emotion_type,
            'voice_type'    => getProp($data, 'voice_type'),
            'voice_name'    => getProp($data, 'voice_name'),
            'speed_ratio'   => getProp($data, 'speed_ratio'),
            'loudness_ratio'=> getProp($data, 'loudness_ratio'),
            'emotion_scale' => getProp($data, 'emotion_scale'),
            // 'paragraph_audio_url' => '',
            'generate_status' => '制作中',
            'error_msg'     => '',
            'updated_at'    => date('Y-m-d H:i:s')
        ];

        $continue = false;
        // 判断是否含有中文、数字或英文,如果没有则跳过合成
        if (!preg_match('/[\x{4e00}-\x{9fa5}]+/u', $list['text']) && !preg_match('/[0-9]+/', $list['text']) && !preg_match('/[a-zA-Z]+/', $list['text'])) {
            $list['generate_status'] = '制作成功';
            $list['paragraph_audio_url'] = 'https://zw-audiobook.tos-cn-beijing.volces.com/effects/ellipses_2s.mp3';
            $continue = true;
        }

        // if (getProp($data, 'paragraph_audio_url')) $list['paragraph_audio_url'] = getProp($data, 'paragraph_audio_url');
        if ($id) {
            $boolen = DB::table('mp_chapter_paragraph_audios')->where('id', $id)->update($list);
        }else {
            $list['created_at'] = date('Y-m-d H:i:s');
            $id = DB::table('mp_chapter_paragraph_audios')->insertGetId($list);
            $boolen = $id ? true : false;
        }

        // 如果更新成功则加入查询队列
        if ($boolen) {
            $redis_key = "select-{$bid}-{$version_id}-{$cid}";
            Redis::sadd($redis_key, $id);
        }

        if ($boolen && !$continue) {
            $boolen = false;
            $client = new Client(['timeout' => 300, 'verify' => false]);
            // 根据ID通过API通知合成音频
            // $result = $client->get("http://47.240.171.155:5000/api/previewTask?taskId={$id}");
            $result = $client->get("http://122.9.129.83:5000/api/previewTask?taskId={$id}");
            $response = $result->getBody()->getContents();
            $response_arr = json_decode($response, true);
            if (!isset($response_arr['code']) || (int)$response_arr['code'] !== 0) {
                $error_msg = isset($response_arr['msg']) ? $response_arr['msg'] : '未知错误';
                Log::info('通知火山生成段落音频失败: '.$error_msg);
                Utils::throwError('20003:通知火山生成段落音频失败');
            }
            $boolen = true;
        }

        return $boolen;
    }

    // 新增合成任务
    public function addGenerateTask($data) {
        $bid = getProp($data, 'bid');
        $cid = getProp($data, 'cid');
        $version_id = getProp($data, 'version_id');
        $generate_json = getProp($data, 'generate_json');

        // 获取已生成的音频
        $paragraph_audios = DB::table('mp_chapter_paragraph_audios')->where('bid', $bid)->where('cid', $cid)->where('version_id', $version_id)->get();

        $paragraph_list = [];
        foreach($paragraph_audios as $item) {
            $paragraph_list[getProp($item, 'sequence')] = [
                'role'                  => getProp($item, 'role'),
                'gender'                => getProp($item, 'gender'),
                'text'                  => trim(getProp($item, 'text')),
                'emotion'               => getProp($item, 'emotion'),
                'emotion_type'          => getProp($item, 'emotion_type'),
                'voice_type'            => getProp($item, 'voice_type'),
                'voice_name'            => getProp($item, 'voice_name'),
                'speed_ratio'           => getProp($item, 'speed_ratio'),
                'loudness_ratio'        => getProp($item, 'loudness_ratio'),
                'emotion_scale'         => getProp($item, 'emotion_scale'),
                'paragraph_audio_url'   => getProp($item, 'paragraph_audio_url'),
            ];
        }

        // 更新角色-音色信息
        $existed_role_info = DB::table('mp_book_version')->where('bid', $bid)->where('id', $version_id)->value('role_info');
        $existed_role_info = json_decode($existed_role_info, true);
        if (!$existed_role_info) $existed_role_info = [];

        // 获取情感信息
        $emotion_list = DB::table('mp_emotion_list')->where('is_enabled', 1)->pluck('emotion_name', 'emotion_code')->toArray();
        $emotion_list = array_flip($emotion_list);

        // 获取音色对应情感组
        $timbre_emotions = DB::table('mp_timbres')->where('is_enabled', 1)->select('timbre_type', 'emotion')->get();
        $timbre_emotion_list = [];
        foreach($timbre_emotions as $item) {
            $timbre_emotion_list[getProp($item, 'timbre_type')] = explode('，', getProp($item, 'emotion'));
        }

        // 构造生成音频的json
        $words = json_decode($generate_json, true);

        // 最终合成前的参数组
        $mp_chapter_paragraph_audios = [];
        $sequence = 1;
        foreach($words as &$word) {
            if (!isset($word['text']) || !isset($word['emotion']) || !isset($word['voice_type']) || !isset($word['voice_name']) || !isset($word['speed_ratio']) || !isset($word['loudness_ratio']) || !isset($word['emotion_scale'])) Utils::throwError('20003:参数格式有误');
            if (!($word['text']) || !($word['voice_type']) || !($word['voice_name'])) Utils::throwError('20003:参数不得为空');
            $role = getProp($word, 'role');
            $word['gender'] = (int)$word['gender'];

            // 判断音色对应情感是否支持,不支持则调整为中性
            $access_emotion = isset($timbre_emotion_list[$word['voice_type']]) ? $timbre_emotion_list[$word['voice_type']] : [];
            if (!in_array($word['emotion'], $access_emotion)) $word['emotion'] = '中性';
            // 如果有对应情感则赋值,没有则默认为中性(neutral)
            if (isset($emotion_list[getProp($word, 'emotion')])) {
                $word['emotion_type'] = $emotion_list[getProp($word, 'emotion')];
            }else {
                $word['emotion'] = '中性';
                $word['emotion_type'] = 'neutral';
            }
            $existed_role_info[$role] = [
                'timbre_type'   => $word['voice_type'],
                'timbre_name'   => $word['voice_name'],
            ];
            $word['paragraph_audio_url'] = '';

            // 判断生成参数是否相同,相同则直接使用已生成的音频
            $paragraph = isset($paragraph_list[$sequence]) ? $paragraph_list[$sequence] : [];
            // 如果音频存在并且参数都未改变则使用已生成的音频
            if (getProp($paragraph, 'paragraph_audio_url')) {
                if (getProp($paragraph, 'role') == getProp($word, 'role') && getProp($paragraph, 'text') == getProp($word, 'text') && 
                    getProp($paragraph, 'voice_type') == getProp($word, 'voice_type') && 
                    getProp($paragraph, 'speed_ratio') == getProp($word, 'speed_ratio') && getProp($paragraph, 'loudness_ratio') == getProp($word, 'loudness_ratio') &&
                    getProp($paragraph, 'emotion_scale') == getProp($word, 'emotion_scale'))
                {
                        $word['paragraph_audio_url'] = getProp($paragraph, 'paragraph_audio_url');
                }
            }

            $tmp = $word;
            // 组装章节分句音频数据
            // $tmp['sequence'] = getProp($word, 'sequence');
            // $tmp['text'] = getProp($word, 'text');
            // $tmp['emotion'] = getProp($word, 'emotion');
            // $tmp['emotion_type'] = getProp($word, 'emotion_type');
            // $tmp['voice_name'] = getProp($word, 'voice_name');
            // $tmp['voice_type'] = getProp($word, 'voice_type');
            // $tmp['speed_ratio'] = getProp($word, 'speed_ratio');
            // $tmp['loudness_ratio'] = getProp($word, 'loudness_ratio');
            // $tmp['emotion_scale'] = getProp($word, 'emotion_scale');
            $tmp['bid'] = $bid;
            $tmp['version_id'] = $version_id;
            $tmp['cid'] = $cid;
            $tmp['sequence'] = $sequence;
            $tmp['created_at'] = date('Y-m-d H:i:s');
            $tmp['updated_at'] = date('Y-m-d H:i:s');
            if (!getProp($tmp, 'paragraph_audio_url')) Utils::throwError('20003:段落未生成音频,请等待完成后提交');
            $mp_chapter_paragraph_audios[] = $tmp;

            $sequence++;
        }
        $generate_json = json_encode($words, 256);

        try {
            DB::beginTransaction();
            $role_info = json_encode($existed_role_info, 256);
            $boolen = DB::table('mp_book_version')->where('bid', $bid)->where('id', $version_id)->update(['role_info' => $role_info, 'updated_at' => date('Y-m-d H:i:s')]);
            if (!$boolen) {
                DB::rollBack();
                Utils::throwError('20003:更新角色信息失败');
            }

            $count = DB::table('mp_audio_tasks')->where('bid', $bid)->where('version_id', $version_id)->where('cid', $cid)->count('id');
            $chapter_audio = DB::table('mp_chapter_audios')->where('bid', $bid)->where('version_id', $version_id)->where('cid', $cid)->first();
            if (!$count) {
                $task_name = getProp($chapter_audio, 'book_name').' '.getProp($chapter_audio, 'chapter_name').'【'.getProp($chapter_audio, 'version_name').'】';
            }else {
                $task_name = getProp($chapter_audio, 'book_name').' '.getProp($chapter_audio, 'chapter_name').'【'.getProp($chapter_audio, 'version_name').'】('.($count+1).')';
            }
            $boolen1 = DB::table('mp_chapter_audios')->where('bid', $bid)->where('version_id', $version_id)->where('cid', $cid)->update(['generate_status'=>'制作中', 'generate_json' => $generate_json, 'updated_at' => date('Y-m-d H:i:s')]);
            if (!$boolen1) {
                DB::rollBack();
                Utils::throwError('20003:更新生成数据失败');
            }
            $id = DB::table('mp_audio_tasks')->insertGetId([
                'audio_id'      => getProp($chapter_audio, 'id'),
                'generate_status'   => '执行中',
                'generate_json' => $generate_json,
                'bid'           => $bid,
                'book_name'     => getProp($chapter_audio, 'book_name'),
                'version_id'    => $version_id,
                'version_name'  => getProp($chapter_audio, 'version_name'),
                'cid'           => $cid,
                'chapter_name'  => getProp($chapter_audio, 'chapter_name'),
                'task_name'     => $task_name,
                'created_at'    => date('Y-m-d H:i:s'),
                'updated_at'    => date('Y-m-d H:i:s')
            ]);
            
            if (!$id) {
                DB::rollBack();
                Utils::throwError('20003:创建任务失败');
            }

            // // 删除章节分句音频数据并重新插入
            // DB::table('mp_chapter_paragraph_audios')->where('bid', $bid)->where('version_id', $version_id)->where('cid', $cid)->delete();
            // $boolen3 = DB::table('mp_chapter_paragraph_audios')->insert($mp_chapter_paragraph_audios);
            // if (!$boolen3) {
            //     DB::rollBack();
            //     Utils::throwError('20003:更新章节分句音频失败');
            // }

        } catch (\Exception $e) {
            DB::rollBack();
            Utils::throwError('20003:'.$e->getMessage());
        }
        DB::commit();

        // 通知火山生成音频
        $client = new Client(['timeout' => 300, 'verify' => false]);
        // 根据ID通过API通知合成音频
        // $result = $client->get("http://47.240.171.155:5000/api/chapterTask?taskId={$id}");
        $result = $client->get("http://122.9.129.83:5000/api/chapterTask?taskId={$id}");
        $response = $result->getBody()->getContents();
        $response_arr = json_decode($response, true);
        if (!isset($response_arr['code']) || (int)$response_arr['code'] !== 0) {
            $error_msg = isset($response_arr['msg']) ? $response_arr['msg'] : '未知错误';
            Log::info('通知火山生成音频失败: '.$error_msg);
            Utils::throwError('20003:通知火山生成音频失败');
        }

        return true;
    }

    public function timbreList($data) {
        $gender = getProp($data, 'gender');
        $timbre_name = getProp($data, 'voice_name');
        $category_id = getProp($data, 'category_id');
        
        $query = DB::table('mp_timbres')->where('is_enabled', 1)->select('timbre_name as voice_name', 'timbre_type as voice_type', 'gender', 'language', 'emotion', 'label', 'first_category_id', 'first_category_name', 'second_category_id', 'second_category_name', 'third_category_id', 'third_category_name', 'audio_url');
        if ($gender) {
            $query->where('gender', $gender);
        }
        if ($timbre_name) {
            $query->where('timbre_name', 'like', "%{$timbre_name}%");
        }
        if ($category_id) {
            $query->where(function ($query) use ($category_id) {
                $query->where('first_category_id', $category_id)->orWhere('second_category_id', $category_id)->orWhere('third_category_id', $category_id);
            });
        }

        $list = $query->get()->map(function ($value) {
            $value = (array)$value;
            $value['voice_name'] = str_replace('（多情感）', '', $value['voice_name']);
            return $value;
        })->toArray();

        return $list;
    }

    // 生成火山临时token
    public function setStsToken() {
        // ************* 配置参数 *************
        $method = 'GET';
        $service = 'sts';
        $host = 'open.volcengineapi.com';
        $region = env('VOLC_REGION');
        $endpoint = 'https://open.volcengineapi.com';
        // $endpoint = 'https://tos-cn-beijing.volces.com';
        $access_key = env('VOLC_AK');
        $secret_key = env('VOLC_SK');

        // 获取缓存中的token，如果没有则请求接口
        $token = Redis::get('volc_sts_token');
        if (!$token) {
            // 查询参数
            $query_parameters = [
                'Action' => 'AssumeRole',
                'RoleSessionName' => 'user@zw',
                'RoleTrn' => 'trn:iam::2102575520:role/tos_role',
                'Version' => '2018-01-01'
            ];

            // 生成URL编码的查询字符串
            $request_parameters = http_build_query($query_parameters, '', '&', PHP_QUERY_RFC3986);

            // 获取签名头信息
            $headers = $this->getSignHeaders($method, $service, $host, $region, $request_parameters, $access_key, $secret_key);

            // 构建完整URL
            $request_url = $endpoint . '?' . $request_parameters;

            $client = new Client(['verify' => false]);
            $response = $client->get($request_url, ['headers' => $headers]);
            $response_arr = json_decode($response->getBody()->getContents(), true);

            $result = [
                'SessionToken'      => isset($response_arr['Result']['Credentials']['SessionToken']) ? $response_arr['Result']['Credentials']['SessionToken'] : '',
                'AccessKeyId'       => isset($response_arr['Result']['Credentials']['AccessKeyId']) ? $response_arr['Result']['Credentials']['AccessKeyId'] : '',
                'SecretAccessKey'   => isset($response_arr['Result']['Credentials']['SecretAccessKey']) ? $response_arr['Result']['Credentials']['SecretAccessKey'] : '',
                'Region'            => env('VOLC_REGION'),
                'Endpoint'          => env('VOLC_END_POINT'),
                'Bucket'            => env('VOLC_BUCKET'),
            ];

            // 缓存token
            Redis::setex('volc_sts_token', 3000, json_encode($result));
            return $result;
        } else {
            return json_decode($token, true);
        }
        
        // $response = $response['Response'];
        // $access_key = $response['Credentials']['AccessKeyId'];
        // $secret_key = $response['Credentials']['AccessKeySecret'];
        // $security_token = $response['Credentials']['SecurityToken'];
        // $expiration = $response['Credentials']['Expiration'];
        // dd($response_arr);
    }

    private function sign($key, $msg) {
        return hash_hmac('sha256', $msg, $key, true);
    }
   
    // 生成签名密钥
    private function getSignatureKey($key, $dateStamp, $regionName, $serviceName) {
        $kDate = $this->sign($key, $dateStamp);
        $kRegion = $this->sign($kDate, $regionName);
        $kService = $this->sign($kRegion, $serviceName);
        $kSigning = $this->sign($kService, 'request');
        return $kSigning;
    }

    // 获取签名头信息
    private function getSignHeaders($method, $service, $host, $region, $request_parameters, $access_key, $secret_key) {
        $contenttype = 'application/x-www-form-urlencoded';
        $accept = 'application/json';
        
        // 获取当前UTC时间
        $t = new DateTime('now', new DateTimeZone('UTC'));
        $xdate = $t->format('Ymd\THis\Z');
        $datestamp = $t->format('Ymd');
        
        // 1. 拼接规范请求串
        $canonical_uri = '/';
        $canonical_querystring = $request_parameters;
        $canonical_headers = "content-type:{$contenttype}\nhost:{$host}\nx-date:{$xdate}\n";
        $signed_headers = 'content-type;host;x-date';
        
        // 空请求体的SHA256哈希
        $payload_hash = hash('sha256', '');
        
        $canonical_request = implode("\n", [
            $method,
            $canonical_uri,
            $canonical_querystring,
            $canonical_headers,
            $signed_headers,
            $payload_hash
        ]);
        
        // 2. 拼接待签名字符串
        $algorithm = 'HMAC-SHA256';
        $credential_scope = implode('/', [$datestamp, $region, $service, 'request']);
        $hashed_canonical_request = hash('sha256', $canonical_request);
        
        $string_to_sign = implode("\n", [
            $algorithm,
            $xdate,
            $credential_scope,
            $hashed_canonical_request
        ]);
        
        // 3. 计算签名
        $signing_key = $this->getSignatureKey($secret_key, $datestamp, $region, $service);
        $signature = hash_hmac('sha256', $string_to_sign, $signing_key);
        
        // 4. 添加签名到请求头
        $authorization_header = sprintf(
            '%s Credential=%s/%s, SignedHeaders=%s, Signature=%s',
            $algorithm,
            $access_key,
            $credential_scope,
            $signed_headers,
            $signature
        );
        
        return [
            'Accept' => $accept,
            'Content-Type' => $contenttype,
            'X-Date' => $xdate,
            'Authorization' => $authorization_header
        ];
    }

    // 文字合成语音(火山引擎)
    public function tts($data) {
        $url = 'https://openspeech.bytedance.com/api/v1/tts';
        $headers = [
            'Authorization' => 'Bearer;'.env('VOLC_TOKEN'),
            'Content-Type'  => 'application/json; charset=UTF-8'
        ];

        $post_data = [
            'app'   => [
                'appid'     => env('VOLC_APPID'),
                'token'     => env('VOLC_TOKEN'),
                'cluster'   => 'volcano_tts'
            ],
            'user'  => [
                'uid'       => 'mp_audio'
            ],
            // 'audio' => [
            //     'voice_type'    => 
            // ],
        ];
    }

    public function generateScriptWords($cid, $model = 'r1') {
        ini_set('max_execution_time', 0);
        if (!$cid) Utils::throwError('20003: 请选择章节!');
        $content = DB::table('chapters as c')->leftJoin('chapter_contents as cc', 'c.chapter_content_id', '=', 'cc.id')->where('c.id', $cid)->value('cc.content');
        $model = $model == 'r1' ? 'deepseek-reasoner' : 'deepseek-chat';
        
        $messages = [
            [
                'role'      => 'system',
                'content'   => '下面有一段小说文本，请帮我将文本中的每句话按从上到下的顺序拆分成角色不同的剧本文稿(不得更改上下文顺序和内容)，文稿形式严格按照“角色名(男或女)：台词{情感}”输出，需要注意以下几点要求:
1.角色名后不要加入任何其他词语，只能加不包括旁白的性别，在男或女中选
2.非对话部分请全部用旁白角色代替
3.情感必须在【开心、悲伤、生气、惊讶、恐惧、厌恶、激动、冷漠、中性、沮丧、撒娇、害羞、安慰鼓励、咆哮、温柔、自然讲述、情感电台、磁性、广告营销、气泡音、新闻播报、娱乐八卦】中选一个，不得使用其他词语'
            ],
            [
                'role'      => 'user',
                'content'   => $content
            ]
        ];
        $post_data = [
            'model'                 => $model,     // R1模型: deepseek-reasoner V3模型: deepseek-chat
            'messages'              => $messages,
            'max_tokens'            => 8192,
            'temperature'           => 1,   // 采样温度，介于 0 和 2 之间。更高的值，如 0.8，会使输出更随机，而更低的值，如 0.2，会使其更加集中和确定。 我们通常建议可以更改这个值或者更改 top_p，但不建议同时对两者进行修改。
            // 'top_p'                 => 1,   // 作为调节采样温度的替代方案（<=1），模型会考虑前 top_p 概率的 token 的结果。所以 0.1 就意味着只有包括在最高 10% 概率中的 token 会被考虑。 我们通常建议修改这个值或者更改 temperature，但不建议同时对两者进行修改。
            'frequency_penalty'     => 0,   // 介于 -2.0 和 2.0 之间的数字。如果该值为正，那么新 token 会根据其在已有文本中的出现频率受到相应的惩罚，降低模型重复相同内容的可能性。
            'presence_penalty'      => 0,   // 介于 -2.0 和 2.0 之间的数字。如果该值为正，那么新 token 会根据其是否已在已有文本中出现受到相应的惩罚，从而增加模型谈论新主题的可能性。
            'response_format'       => [
                'type'  => 'text'           // 默认值text,回答的结果输出文字(非接口返回值是text,接口返回值还是json字串),还可选:json_object,输出json格式
            ],
            'stream'                => false  // 是否流式输出,如果设置为 True，将会以 SSE（server-sent events）的形式以流式发送消息增量。消息流以 data: [DONE] 结尾。
        ];

        $client = new Client(['timeout' => 1200, 'verify' => false]);
        $result = $client->post($this->url, ['json' => $post_data, 'headers' => $this->headers]);
        $response = $result->getBody()->getContents();
        $response_arr = json_decode($response, true);
        $update_data = [];
        $content = '';
        if (isset($response_arr['choices']) && count($response_arr['choices']) > 0) {
            $content = isset($response_arr['choices'][0]['message']['content']) ? $response_arr['choices'][0]['message']['content'] : '';
            $update_data = [
                'role'      => 'assistant',
                'content'   => $response_arr['choices'][0]['message']['content'],
                'usage'     => isset($response_arr['usage']) ? $response_arr['usage'] : []
            ];
        }

        return $content;
    }
}