<?php

declare(strict_types=1);

/**
 * Retires the six old-taxonomy category stubs under /products (decision
 * Olli 2026-10-27; diagnosis check_old_stubs.php: all six are EMPTY -
 * no content elements, no child pages, so nothing needs moving):
 *
 *   soft-delete the stub page and queue a 301 sys_redirect onto its new
 *   category equivalent. Guards: a stub with children or visible content
 *   is skipped and reported; an existing redirect for the path is kept.
 *
 * Usage:  php migrations/retire_old_category_stubs.php          (dry run)
 *         php migrations/retire_old_category_stubs.php --apply
 */

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

$apply = in_array('--apply', $argv, true);

$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("no project root\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]
);

$map = [
    '/products/platforms-and-end-points' => '/products/iptv-and-digital-signage',
    '/products/ip-video-streaming' => '/products/video-encoding-and-streaming',
    '/products/control-room-solutions' => '/products/control-room-platforms',
    '/products/avoip-distribution-kvm' => '/products/av-over-ip-and-kvm',
    '/products/graphics-multi-display' => '/products/graphics-and-multi-display',
    '/products/infrastructure-accessories' => '/products/infrastructure-and-accessories',
];

echo ($apply ? "APPLY\n" : "DRY-RUN\n");
foreach ($map as $oldSlug => $newSlug) {
    $stub = $pdo->prepare('SELECT uid, title FROM pages WHERE deleted = 0 AND slug = ?');
    $stub->execute([$oldSlug]);
    $stub = $stub->fetch();
    if (!$stub) {
        echo "  = $oldSlug: already gone\n";
        continue;
    }
    $uid = (int)$stub['uid'];
    $children = (int)$pdo->query("SELECT COUNT(*) FROM pages WHERE deleted = 0 AND pid = $uid")->fetchColumn();
    $content = (int)$pdo->query("SELECT COUNT(*) FROM tt_content WHERE deleted = 0 AND pid = $uid")->fetchColumn();
    if ($children > 0 || $content > 0) {
        echo "  !! #$uid $oldSlug has $children child page(s) / $content element(s) - SKIPPED, decide manually\n";
        continue;
    }
    $target = $pdo->prepare('SELECT uid FROM pages WHERE deleted = 0 AND slug = ?');
    $target->execute([$newSlug]);
    $targetUid = (int)($target->fetchColumn() ?: 0);
    if ($targetUid === 0) {
        echo "  !! target $newSlug not found - #$uid skipped\n";
        continue;
    }
    $stmt = $pdo->prepare('SELECT COUNT(*) FROM sys_redirect WHERE deleted = 0 AND source_path = ?');
    $stmt->execute([$oldSlug]);
    $hasRedirect = (int)$stmt->fetchColumn();
    echo "  ~ DELETE #$uid \"{$stub['title']}\" ($oldSlug) -> 301 to $newSlug (#$targetUid)" . ($hasRedirect ? ' [redirect exists, kept]' : '') . "\n";
    if (!$apply) {
        continue;
    }
    $pdo->prepare('UPDATE pages SET deleted = 1, tstamp = UNIX_TIMESTAMP() WHERE uid = ?')->execute([$uid]);
    if (!$hasRedirect) {
        $pdo->prepare(
            "INSERT INTO sys_redirect (pid, createdon, updatedon, source_host, source_path, target, target_statuscode)
             VALUES (0, UNIX_TIMESTAMP(), UNIX_TIMESTAMP(), '*', ?, ?, 301)"
        )->execute([$oldSlug, 't3://page?uid=' . $targetUid]);
    }
}
echo $apply ? "Done. Flush the cache (redirects are cached).\n" : "DRY RUN - add --apply to write.\n";