<?php

namespace App\Services;

use App\Models\Recording;
use Closure;
use Laravel\Ai\Transcription;

class TranscriptionService
{
    /**
     * Transcribe a recording with the local faster-whisper server.
     *
     * @param  (Closure(string, int): void)|null  $onProgress
     */
    public function transcribe(Recording $recording, ?Closure $onProgress = null): string
    {
        $report = $onProgress ?? static fn (string $message, int $percent) => null;
        $model = config('ai.local_whisper_model', 'Systran/faster-whisper-base');

        $report('Connecting to local faster-whisper server…', 30);
        $report("Transcribing locally with {$model} (audio stays on this machine)…", 50);

        $transcript = Transcription::fromStorage($recording->file_path)
            ->timeout((int) config('ai.transcription_timeout', 600))
            ->generate('local-whisper', $model);

        $report('Received transcript from local Whisper…', 85);

        return (string) $transcript;
    }
}