<?php

return [
    // 开启后优先请求 CosyVoice；服务异常时会自动回落到 OpenAI / 浏览器语音。
    'enabled'            => filter_var(env('COSYVOICE_ENABLED', true), FILTER_VALIDATE_BOOLEAN),
    'base_url'           => rtrim((string) env('COSYVOICE_BASE_URL', 'http://127.0.0.1:50000'), '/'),
    // sft / instruct / zero_shot / cross_lingual / instruct2
    'mode'               => (string) env('COSYVOICE_MODE', 'sft'),
    'speaker'            => (string) env('COSYVOICE_SPEAKER', '中文女'),
    'instruct_text'      => (string) env(
        'COSYVOICE_INSTRUCT',
        '请用温暖、自然、耐心的中文客服语气表达，语速适中，停顿真实，避免播音腔和夸张情绪。'
    ),
    'prompt_text'        => (string) env('COSYVOICE_PROMPT_TEXT', ''),
    'prompt_wav'         => (string) env(
        'COSYVOICE_PROMPT_WAV',
        root_path() . 'storage/cosyvoice/customer-service.wav'
    ),
    // CosyVoice-300M 常用 22050；CosyVoice2/3 通常应配置为 24000。
    'sample_rate'        => max(8000, (int) env('COSYVOICE_SAMPLE_RATE', 22050)),
    'connect_timeout_ms' => max(200, (int) env('COSYVOICE_CONNECT_TIMEOUT_MS', 800)),
    'timeout_seconds'    => max(2, (int) env('COSYVOICE_TIMEOUT_SECONDS', 8)),
    'failure_ttl'        => max(5, (int) env('COSYVOICE_FAILURE_TTL', 20)),
    // 官方 FastAPI 默认无鉴权；经网关暴露时可使用 Bearer Token。
    'api_key'            => (string) env('COSYVOICE_API_KEY', ''),
];