declare(strict_types=1);
header('Content-Type: application/json; charset=utf-8');

function http_get(string $url, int $timeout = 18, string $lang = 'ja-JP,ja'): array {
    $ch = curl_init($url);
    curl_setopt_array($ch, [
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_FOLLOWLOCATION => true,
        CURLOPT_MAXREDIRS      => 5,
        CURLOPT_CONNECTTIMEOUT => 10,
        CURLOPT_TIMEOUT        => $timeout,
        CURLOPT_ENCODING       => '',
        CURLOPT_USERAGENT      => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.36',
        CURLOPT_HTTPHEADER     => [
            'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
            'Accept-Language: ' . $lang,
            'Cache-Control: no-cache',
        ],
        CURLOPT_PROXY => jp_pick_proxy(),
]);
    $html = curl_exec($ch);
    $http = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    return [$http, (string)$html];
}

function clean_text(string $s): string {
    $s = html_entity_decode(strip_tags($s), ENT_QUOTES | ENT_HTML5, 'UTF-8');
    $s = preg_replace('/[\r\n\t]+/u', ' ', $s);
    $s = preg_replace('/\s{2,}/u', ' ', $s);
    return trim((string)$s);
}

function getFirst(string $pattern, string $html): string {
    if (preg_match($pattern, $html, $m)) {
        return clean_text($m[1]);
    }
    return '';
}

function is_generic_zen(string $title, string $desc): bool {
    $badTitles = ['Ähnliche Artikel', 'سلع مشابهة', 'よく似た商品', 'Artikelbezeichnung'];
    foreach ($badTitles as $b) {
        if (mb_stripos($title, $b) !== false) return true;
    }
    // Generic marketing blurbs in different languages
    $badSnips = [
        'ZenMarketは海外', 'ZenMarket は海外', // ja
        'ZenMarket ist der',                 // de
        'ZenMarket هي أفضل',                 // ar
        'ZenMarket is the best'              // en
    ];
    foreach ($badSnips as $s) {
        if (mb_stripos($desc, $s) !== false) return true;
    }
    return false;
}

$url  = $_GET['url'] ?? '';
$code = $_GET['itemCode'] ?? '';

if ($url && !$code && preg_match('/(?:itemCode|item_id)=([A-Za-z0-9_]+)/', $url, $m)) {
    $code = $m[1];
}

if (!$url && $code) {
    // force the Japanese page
    $url = "https://zenmarket.jp/ja/mercariproduct.aspx?itemCode={$code}";
}

$result = [
    'success'   => false,
    'http'      => 0,
    'route'     => '',
    'url'       => $url,
    'title'     => '',
    'description'=> '',
    'raw_len'   => 0,
];

if (!$url) {
    $result['error'] = 'missing url or itemCode';
    echo json_encode($result, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT);
    exit;
}

// 1) Try ZenMarket (Japanese)
[$http, $html] = http_get($url, 18, 'ja-JP,ja');
$result['http']    = $http;
$result['route']   = 'zen';
$result['url']     = $url;
$result['raw_len'] = is_string($html) ? strlen($html) : 0;

$title = '';
$desc  = '';

// Typical ZenMarket selectors
$title = getFirst('/id=["\\\']ctl00_ContentPlaceHolder1_lblItemTitle["\\\'][^>]*>(.*?)<\\/span>/is', $html);
if (!$title) $title = getFirst('/class=["\\\']product-title["\\\'][^>]*>(.*?)<\\/[^>]+>/is', $html);
if (!$title) $title = getFirst('/<h1[^>]*>(.*?)<\\/h1>/is', $html);

$desc = getFirst('/id=["\\\']ctl00_ContentPlaceHolder1_itemDetail["\\\'][^>]*>(.*?)<\\/div>/is', $html);
if (!$desc) $desc = getFirst('/<meta\\s+name=["\\\']description["\\\']\\s+content=["\\\']([^"\\\']+)["\\\']/i', $html);
if (!$title) $title = getFirst('/<meta\\s+property=["\\\']og:title["\\\']\\s+content=["\\\']([^"\\\']+)["\\\']/i', $html);
if (!$desc) $desc = getFirst('/<meta\\s+property=["\\\']og:description["\\\']\\s+content=["\\\']([^"\\\']+)["\\\']/i', $html);

// 2) Fallback: if title/desc empty or generic => Mercari direct
if ((!$title && !$desc) || is_generic_zen($title, $desc)) {
    if (!$code && preg_match('/(?:itemCode|item_id)=([A-Za-z0-9_]+)/', $url, $m)) {
        $code = $m[1];
    }
    if ($code) {
        $murl = "https://jp.mercari.com/item/{$code}";
        [$h2, $hhtml] = http_get($murl, 18, 'ja-JP,ja');
        if ($h2 > 0) {
            $result['route']   = 'mercari';
            $result['url']     = $murl;
            $result['http']    = $h2;
            $result['raw_len'] = is_string($hhtml) ? strlen($hhtml) : 0;

            $mtitle = getFirst('/<meta\\s+property=["\\\']og:title["\\\']\\s+content=["\\\']([^"\\\']+)["\\\']/i', $hhtml);
            if (!$mtitle) $mtitle = getFirst('/<title[^>]*>(.*?)<\\/title>/is', $hhtml);
            $mdesc  = getFirst('/<meta\\s+name=["\\\']description["\\\']\\s+content=["\\\']([^"\\\']+)["\\\']/i', $hhtml);
            if (!$mdesc) $mdesc = getFirst('/<meta\\s+property=["\\\']og:description["\\\']\\s+content=["\\\']([^"\\\']+)["\\\']/i', $hhtml);

            if ($mtitle) $title = $mtitle;
            if ($mdesc)  $desc  = $mdesc;
        }
    }
}

$result['title']       = $title;
$result['description'] = $desc;
$result['success']     = (bool)$result['title'] || (bool)$result['description'];

echo json_encode($result, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT);