<?php

namespace App\Services;

use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;

class OllamaService
{
    private string $baseUrl;
    private string $model;

    public function __construct()
    {
        $this->baseUrl = rtrim(config('speech2text.ollama.base_url'), '/');
        $this->model   = config('speech2text.ollama.model');
    }

    /**
     * Clean and improve raw transcript text using a local Ollama model.
     * Returns corrected text, or null if Ollama is unavailable.
     */
    public function cleanTranscript(string $rawText, string $language = 'ms'): ?string
    {
        $langLabel = $language === 'ms' ? 'Bahasa Melayu' : 'English';

        $prompt = <<<PROMPT
Anda adalah pembantu penyuntingan teks transkripsi automatik dalam {$langLabel}.

Tugas anda:
1. Betulkan ejaan dan tanda baca
2. Pisahkan ayat dengan betul
3. Kekalkan maksud asal — JANGAN tukar kandungan atau tambah maklumat baru
4. Kembalikan hanya teks yang telah diperbetulkan, tiada penjelasan tambahan

Teks transkripsi:
{$rawText}
PROMPT;

        try {
            $response = Http::timeout(120)
                ->post("{$this->baseUrl}/api/generate", [
                    'model'  => $this->model,
                    'prompt' => $prompt,
                    'stream' => false,
                ]);

            if (! $response->successful()) {
                Log::warning("OllamaService: HTTP {$response->status()} dari {$this->baseUrl}");
                return null;
            }

            $text = trim($response->json('response') ?? '');

            return $text !== '' ? $text : null;

        } catch (\Throwable $e) {
            Log::warning("OllamaService tidak tersedia: {$e->getMessage()}");
            return null;
        }
    }

    public function isAvailable(): bool
    {
        try {
            return Http::timeout(5)->get("{$this->baseUrl}/api/tags")->successful();
        } catch (\Throwable) {
            return false;
        }
    }
}