<?php

declare(strict_types=1);

/**
 * Diagnose: why does a VITEC container emit an empty `background`?
 *
 * READ-ONLY, plain PDO against config/system/settings.php - same pattern as
 * migrations/export_news.php, so it needs no TYPO3 bootstrap and cannot be
 * affected by any cache.
 *
 * Usage:  php migrations/check_bg.php [uid]      (default uid 729)
 */

error_reporting(E_ALL);
ini_set('display_errors', '1');

$uid = (int)($argv[1] ?? 729);

$root = null;
$dir = __DIR__;
for ($i = 0; $i < 5; $i++) {
    if (is_file($dir . '/config/system/settings.php')) {
        $root = $dir;
        break;
    }
    $dir = dirname($dir);
}
if ($root === null) {
    exit("Could not locate project root above " . __DIR__ . "\n");
}

$settings = require $root . '/config/system/settings.php';
$db = $settings['DB']['Connections']['Default'];
$pdo = new PDO(
    sprintf('mysql:host=%s;port=%s;dbname=%s;charset=utf8mb4', $db['host'] ?? 'localhost', $db['port'] ?? 3306, $db['dbname'] ?? ''),
    $db['user'] ?? '',
    $db['password'] ?? '',
    [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC]
);

echo "=== 1) Do the three columns exist? ===\n";
$cols = $pdo->query("SHOW COLUMNS FROM tt_content LIKE 'tx_vitec_bg_%'")->fetchAll();
if ($cols === []) {
    echo "  NONE. database:updateschema has not created them.\n";
} else {
    foreach ($cols as $c) {
        echo sprintf("  %-24s %-18s default=%s\n", $c['Field'], $c['Type'], var_export($c['Default'], true));
    }
}

echo "\n=== 2) The record itself (uid $uid) ===\n";
// Column list built from section 1 rather than hard-coded, so every tx_vitec_bg_*
// field added later shows up here without the script needing an edit.
$select = array_merge(
    ['uid', 'pid', 'CType', 'deleted', 'hidden', 'sys_language_uid', 'l18n_parent'],
    array_column($cols, 'Field')
);
$row = $pdo->query('SELECT ' . implode(', ', $select) . " FROM tt_content WHERE uid = $uid")->fetch();
if (!$row) {
    echo "  no tt_content row with uid $uid\n";
} else {
    foreach ($row as $k => $v) {
        echo sprintf("  %-24s %s\n", $k, var_export($v, true));
    }
}

echo "\n=== 3) File references pointing at this record ===\n";
$refs = $pdo->query(
    "SELECT r.uid, r.tablenames, r.fieldname, r.uid_local, r.uid_foreign, r.deleted, r.hidden, r.sorting_foreign,
            f.identifier, f.name, f.mime_type
     FROM sys_file_reference r LEFT JOIN sys_file f ON f.uid = r.uid_local
     WHERE r.uid_foreign = $uid AND r.tablenames = 'tt_content'"
)->fetchAll();
if ($refs === []) {
    echo "  NONE - nothing references this record. The image was not saved.\n";
} else {
    foreach ($refs as $r) {
        echo sprintf("  ref %-6s field=%-22s file=%s  deleted=%s hidden=%s\n",
            $r['uid'], $r['fieldname'], (string)$r['identifier'], $r['deleted'], $r['hidden']);
    }
}

echo "\n=== 4) Which fieldnames does tt_content use at all? (top 15) ===\n";
foreach ($pdo->query("SELECT fieldname, COUNT(*) c FROM sys_file_reference WHERE tablenames='tt_content' AND deleted=0 GROUP BY fieldname ORDER BY c DESC LIMIT 15")->fetchAll() as $r) {
    echo sprintf("  %-28s %d\n", $r['fieldname'], $r['c']);
}