html/api/ambre-tool-translate-code.php

<?php
/**
 * ambre-tool-translate-code.php — Translate code JS->Python, Python->JS, etc.
 */
header('Content-Type: application/json');

/* OPT_V2_RETRY - retry once on 503 with simpler model */
if (!function_exists('wvia_llm_retry_once')) {
    function wvia_llm_retry_once($payload) {
        $payload['model'] = 'llama-3.3-70b';
        $ch = curl_init('http://127.0.0.1:4000/v1/chat/completions');
        curl_setopt_array($ch, [
            CURLOPT_POST => true, CURLOPT_RETURNTRANSFER => true,
            CURLOPT_POSTFIELDS => json_encode($payload),
            CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
            CURLOPT_TIMEOUT => 60,
        ]);
        $r = curl_exec($ch);
        $c = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
        return [$c, $r];
    }
}
if ($_SERVER['REQUEST_METHOD'] !== 'POST') { echo json_encode(['ok'=>false,'error'=>'POST only']); exit; }

$input = json_decode(file_get_contents('php://input'), true);
$code = trim($input['code'] ?? '');
$from_lang = $input['from'] ?? 'auto';
$to_lang = $input['to'] ?? 'python';

// If topic was sent instead (from intent router), parse "translate X from Y to Z"
if (!$code && isset($input['topic'])) {
    $topic = $input['topic'];
    // Try extract code block if present
    if (preg_match('/```(?:\w+)?\s*\n(.*?)\n```/s', $topic, $m)) {
        $code = $m[1];
    } else {
        $code = $topic; // treat topic as code
    }
    // Detect to_lang
    foreach (['python','javascript','typescript','go','rust','java','csharp','php','ruby','kotlin','swift'] as $lang) {
        if (stripos($topic, $lang) !== false) { $to_lang = $lang; break; }
    }
}

if (strlen($code) < 5) { echo json_encode(['ok'=>false,'error'=>'code too short']); exit; }
$code = substr($code, 0, 4000);

$prompt = "Expert polyglot programmer. Traduis ce code" . ($from_lang !== 'auto' ? " de $from_lang" : "") . " vers $to_lang:\n\n"
  . "```\n$code\n```\n\n"
  . "Retourne UNIQUEMENT un JSON:\n"
  . "{\n"
  . "  \"from\": \"langue detectee\",\n"
  . "  \"to\": \"$to_lang\",\n"
  . "  \"code\": \"<code traduit complet>\",\n"
  . "  \"notes\": \"Notes sur differences idiomatiques importantes\",\n"
  . "  \"dependencies\": [\"package1\", \"package2\"]\n"
  . "}\n\n"
  . "IMPORTANT:\n"
  . "- Code traduit IDIOMATIQUE dans la langue cible (pas traduction literale)\n"
  . "- Utiliser les conventions modernes (ES2024/Python3.12/Go1.22/etc)\n"
  . "- Preserver les commentaires si presents, traduits en FR\n"
  . "- JSON valide uniquement, aucun texte avant/apres\n"
  . "- dependencies = liste des libs a installer";

$ch = curl_init('http://127.0.0.1:4000/v1/chat/completions');
curl_setopt_array($ch, [
    CURLOPT_POST => true, CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POSTFIELDS => json_encode([
        'model' => 'auto',
        'messages' => [['role'=>'user', 'content'=>$prompt]],
        'max_tokens' => 2500, 'temperature' => 0.3
    ]),
    CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
    CURLOPT_TIMEOUT => 90,
]);
$resp = curl_exec($ch);
$http = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

if ($http !== 200) {
    /* OPT_V2_RETRY - try once with simpler model */
    list($http, $resp) = wvia_llm_retry_once([
        'messages' => [['role'=>'user', 'content'=>$prompt]],
        'max_tokens' => 2500,
        'temperature' => 0.6
    ]);
    if ($http !== 200) {
        echo json_encode(['ok'=>false,'error'=>"LLM HTTP $http (after retry)"]);
        exit;
    }
}

$data = json_decode($resp, true);
$content_raw = $data['choices'][0]['message']['content'] ?? '';

if (preg_match('/```(?:json)?\s*\n?(.*?)\n?```/s', $content_raw, $m)) { $content_raw = $m[1]; }
$jstart = strpos($content_raw, '{');
if ($jstart !== false) {
    $depth = 0; $jend = -1;
    for ($i = $jstart; $i < strlen($content_raw); $i++) {
        if ($content_raw[$i] === '{') $depth++;
        elseif ($content_raw[$i] === '}') { $depth--; if ($depth === 0) { $jend = $i; break; } }
    }
    if ($jend > $jstart) $content_raw = substr($content_raw, $jstart, $jend - $jstart + 1);
}
$result = json_decode($content_raw, true);
if (!$result || !isset($result['code'])) {
    echo json_encode(['ok'=>false,'error'=>'invalid JSON','raw'=>substr($content_raw,0,300)]); exit;
}

echo json_encode([
    'ok' => true,
    'from' => $result['from'] ?? $from_lang,
    'to' => $result['to'] ?? $to_lang,
    'code' => $result['code'],
    'notes' => $result['notes'] ?? '',
    'dependencies' => $result['dependencies'] ?? [],
    'result' => $result['code'], // for inline render
]);