<?php
require __DIR__ . '/../auth.php';
mvlog_require_login();

$MVLOG_ROOT = dirname(__DIR__);
header('Content-Type: application/json; charset=utf-8');

$id = strtolower(trim((string)($_POST['id'] ?? $_GET['id'] ?? '')));
$job = trim((string)($_POST['job'] ?? $_GET['job'] ?? ''));

function mvlog_article_id_is_valid(string $id): bool {
    return (bool)preg_match('/^[0-9]{14}[a-f0-9]{16}$/', $id);
}

function mvlog_legacy_job_is_valid(string $job): bool {
    return (bool)preg_match('/^[0-9]{8}[-_][A-Za-z0-9._-]+$/', $job);
}

function mvlog_read_article_id(string $jobdir): string {
    $path = $jobdir . '/.mvlog-id';
    if (!is_file($path)) return '';
    $value = strtolower(trim((string)@file_get_contents($path)));
    return mvlog_article_id_is_valid($value) ? $value : '';
}

function mvlog_find_jobdir_by_id(string $mvlogRoot, string $articleId): ?string {
    if (!mvlog_article_id_is_valid($articleId)) return null;

    $cacheFile = $mvlogRoot . '/cache/articles-index.json';
    if (is_file($cacheFile)) {
        $cache = json_decode((string)@file_get_contents($cacheFile), true);
        if (is_array($cache) && is_array($cache['by_id'] ?? null)) {
            $name = (string)($cache['by_id'][$articleId] ?? '');
            if ($name !== '') {
                $candidate = $mvlogRoot . '/in-dir/' . basename($name);
                if (is_dir($candidate)) return $candidate;
            }
        }
    }

    foreach (glob($mvlogRoot . '/in-dir/*', GLOB_ONLYDIR) ?: [] as $dir) {
        if (mvlog_read_article_id($dir) === $articleId) return $dir;
    }

    return null;
}

$jobdir = null;
if ($id !== '' && mvlog_article_id_is_valid($id)) {
    $jobdir = mvlog_find_jobdir_by_id($MVLOG_ROOT, $id);
}
if ($jobdir === null && $job !== '' && mvlog_legacy_job_is_valid($job)) {
    $candidate = $MVLOG_ROOT . '/in-dir/' . basename($job);
    if (is_dir($candidate)) $jobdir = $candidate;
}

if ($jobdir === null || !is_dir($jobdir)) {
    http_response_code(404);
    echo json_encode(['status' => 'error', 'message' => 'job not found']);
    exit;
}

$path = $jobdir . '/.mvlog-describe-prompt.txt';
$prompt = is_file($path) ? trim((string)@file_get_contents($path)) : '';

echo json_encode(['status' => 'ok', 'additional_prompt' => $prompt], JSON_UNESCAPED_UNICODE);