<?php

/** Audio is deliberately OFF until the synthetic short/15m/1h gate passes for the current app. */
return [
    'enabled' => filter_var(env('followup_audio.ENABLED', false), FILTER_VALIDATE_BOOLEAN),
    'audio_verified' => filter_var(env('followup_audio.AUDIO_VERIFIED', false), FILTER_VALIDATE_BOOLEAN),
    // Each selected application must separately pass all three synthetic fixtures.
    'verified_profiles' => array_values(array_intersect(['qwen', 'openai'], array_filter(array_map('trim',
        explode(',', (string) env('followup_audio.VERIFIED_PROFILES', '')))))),
    // LLM-suggested media offsets are not reliable ASR alignment; leave off until separately verified.
    'timestamp_verified' => false,
    'profile' => (string) env('followup_audio.PROFILE', 'qwen'),
    'max_bytes' => 524288000,
    'max_seconds' => 3600,
    'chunk_bytes' => 2097152,
    'retention_days' => 90,
    'lease_seconds' => 600,
    'request_timeout' => (int) env('followup_audio.REQUEST_TIMEOUT', 240),
    'concurrency' => max(1, min(8, (int) env('followup_audio.CONCURRENCY', 1))),
    // Keep one stable key across web/worker nodes; empty reuses the existing prescription AI key.
    'encryption_key' => (string) env('followup_audio.ENCRYPTION_KEY', ''),
    'private_dir' => runtime_path() . 'private/followup_audio',
    // Original upload stays <=500 MiB. The same Dify app receives at most this private processing copy.
    'upstream_max_bytes' => (int) env('followup_audio.UPSTREAM_MAX_BYTES', 20971520),
    'normalize_timeout' => (int) env('followup_audio.NORMALIZE_TIMEOUT', 120),
    'ffmpeg' => (string) env('followup_audio.FFMPEG', 'ffmpeg'),
    'ffprobe' => (string) env('followup_audio.FFPROBE', 'ffprobe'),
    'max_response_bytes' => 8388608,
    'asr_stereo_chunk_seconds' => (int) env('followup_audio.ASR_STEREO_CHUNK_SECONDS', 15),
    'asr_chunk_seconds' => (int) env('followup_audio.ASR_CHUNK_SECONDS', 120),
    'asr_max_chunk_bytes' => 4194304,
    'asr_request_timeout' => (int) env('followup_audio.ASR_REQUEST_TIMEOUT', 240),
    'extraction_request_timeout' => (int) env('followup_audio.EXTRACTION_REQUEST_TIMEOUT', 240),
    // HTTP is permitted only for explicitly acknowledged synthetic probes, never patient requests.
    'allow_insecure_synthetic' => filter_var(env('followup_audio.ALLOW_INSECURE_SYNTHETIC', false), FILTER_VALIDATE_BOOLEAN),
    // Stable logical slots preserve task schema. No model identifier or supplier is hardcoded.
    'providers' => array_combine(['qwen', 'openai'], array_map(static function (string $profile): array {
        $prefix = 'followup_audio.' . strtoupper($profile) . '_';
        return [
            'driver' => (string) env($prefix . 'DRIVER', 'dify'),
            // Only the dify driver may reuse empty base/key fields from prescription_ai.
            'base_url' => (string) env($prefix . 'BASE_URL', ''),
            'api_key' => (string) env($prefix . 'API_KEY', ''),
            'model' => (string) env($prefix . 'MODEL', ''),
            'label' => (string) env($prefix . 'LABEL', $profile),
            // Explicit server-only two-stage identities; no fallback to prescription_ai or another slot.
            'allow_loopback_tunnel' => filter_var(env($prefix . 'ALLOW_LOOPBACK_TUNNEL', false), FILTER_VALIDATE_BOOLEAN),
            'asr' => [
                'base_url' => (string) env($prefix . 'ASR_BASE_URL', ''),
                'api_key' => (string) env($prefix . 'ASR_API_KEY', ''),
                'model' => (string) env($prefix . 'ASR_MODEL', ''),
            ],
            'extraction' => [
                'base_url' => (string) env($prefix . 'EXTRACTION_BASE_URL', ''),
                'api_key' => (string) env($prefix . 'EXTRACTION_API_KEY', ''),
                'model' => (string) env($prefix . 'EXTRACTION_MODEL', ''),
                'response_format' => (string) env($prefix . 'EXTRACTION_RESPONSE_FORMAT', 'json_schema'),
                'max_tokens' => (int) env($prefix . 'EXTRACTION_MAX_TOKENS', 8192),
                // Unset is portable; explicit true/false opts into the provider's Qwen chat-template extension.
                'enable_thinking' => env($prefix . 'EXTRACTION_ENABLE_THINKING', null) === null ? null
                    : (filter_var(env($prefix . 'EXTRACTION_ENABLE_THINKING'), FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE) ?? 'invalid'),
            ],
            'verified_fingerprint' => (string) env($prefix . 'VERIFIED_FINGERPRINT', ''),
        ];
    }, ['qwen', 'openai'])),
];