<?php
declare(strict_types=1);
/** Polana V16.4: dynamiczny indeks URL dla sitemap i panelu SEO. Tylko zatwierdzone publiczne strony. */
function p164_base(): string {
    // Ta domena powinna być zgodna z <link rel="canonical"> generowanym przez site_url().
    $base = rtrim((string)site_url(''), '/');
    $p = parse_url($base);
    if (!is_array($p) || ($p['scheme'] ?? '') !== 'https' || !in_array(strtolower((string)($p['host'] ?? '')), ['mojapolanasmakow.pl','polanasmakow.pl'], true)) {
        throw new RuntimeException('Niepoprawny adres site_url; ustaw HTTPS i domenę Polany w panelu SEO.');
    }
    return $base;
}
function p164_xml(string $v): string {
    return htmlspecialchars($v, ENT_XML1|ENT_QUOTES|ENT_SUBSTITUTE, 'UTF-8');
}
function p164_path(string $path, string $lang): string {
    // Stosujemy te same publiczne aliasy, co flagi V11.
    if (function_exists('p11_path')) return p11_path($path, $lang);
    $parts=explode('?', $path, 2);
    $aliases=['/andrzej-polan'=>'/chef','/kontakt'=>'/contact','/rezerwacja'=>'/reservation',
      '/polityka-prywatnosci'=>'/privacy','/alergeny'=>'/allergens','/galeria'=>'/gallery',
      '/wspolpraca'=>'/cooperation'];
    $stem=($lang==='pl' ? $parts[0] : '/'.$lang.($aliases[$parts[0]] ?? $parts[0]));
    if ($lang!=='pl' && $parts[0]==='/') $stem='/'.$lang.'/';
    return $stem.(isset($parts[1])?'?'.$parts[1]:'');
}
function p164_ready_map(): array {
    $ready=[];
    try {
        $sql="SELECT path,lang FROM polana_v11_page_locales WHERE ready=1 AND lang IN ('en','de','es')";
        foreach(db()->query($sql)->fetchAll(PDO::FETCH_ASSOC) as $r) {
            $ready[(string)$r['path'].'|'.(string)$r['lang']]=true;
        }
    }catch(Throwable $e) { error_log('Polana SEO V164 pages ready: '.$e->getMessage()); }
    return $ready;
}
function p164_lastmod($value): ?string {
    if(!is_string($value) || !preg_match('/^\d{4}-\d{2}-\d{2}/',$value)) return null;
    $day=substr($value,0,10);
    $dt=DateTimeImmutable::createFromFormat('!Y-m-d',$day);
    return $dt && $dt->format('Y-m-d')===$day ? $day : null;
}
function p164_sitemap_data(): array {
    $base=p164_base(); $root=dirname(__DIR__); $now=date('Y-m-d');
    $ready=p164_ready_map(); $entries=[]; $skipped=['unapproved_language'=>0,'unpublished'=>0,'hidden'=>0];
    if(setting('site_public_mode','normal')!=='normal') {
        return ['urls'=>[], 'entries'=>[], 'skipped'=>$skipped, 'base'=>$base,'splash'=>true];
    }
    $add=static function(string $path,?string $modified=null,bool $allLanguages=true,array $langs=[])use(&$entries,$ready,$root,$base,&$skipped):void {
        if($langs===[]) {
            $langs=['pl'];
            foreach(['en','de','es'] as $lang) {
                $flag = $path==='/' ? '/' : explode('?', $path,2)[0];
                // Strona /menu-seo odpowiada zatwierdzonej stronie /menu.
                if($flag==='/menu-seo') $flag='/menu';
                if($allLanguages && isset($ready[$flag.'|'.$lang])) $langs[]=$lang;
                elseif($allLanguages) $skipped['unapproved_language']++;
            }
        }
        $alternates=[];
        foreach($langs as $lang) {
            $alternates[$lang]=$base.p164_path($path,$lang);
        }
        foreach($alternates as $lang=>$url) {
            $entries[]=['loc'=>$url,'lang'=>$lang,'path'=>$path,'lastmod'=>$modified,'alternates'=>$alternates];
        }
    };
    $static=[
        ['/', 'index.php',true],
        ['/andrzej-polan','andrzej-polan.php',true],
        ['/kontakt','kontakt.php',true],
        ['/alergeny','alergeny.php',true],
        ['/polityka-prywatnosci','polityka-prywatnosci.php',true],
    ];
    if(function_exists('reservations_enabled') && reservations_enabled()) $static[]=['/rezerwacja','rezerwacja.php',true];
    if(setting('nav_gallery_enabled','0')==='1') $static[]=['/galeria','galeria.php',true];
    if(setting('nav_collaboration_enabled','0')==='1') $static[]=['/wspolpraca','wspolpraca.php',true];
    foreach($static as [$route,$file,$enabled]) {
        if(!$enabled || !is_file($root.'/'.$file))continue;
        $add($route);
    }
    // Menu graficzne /menu ma NOINDEX: do sitemap tylko osobne indeksowalne /menu-seo.
    if(is_file($root.'/menu-seo.php')) {
        $menuRows=[];
        try {
            $q=db()->prepare("SELECT menu_type,MAX(updated_at) lastmod FROM menus WHERE status='published' AND (valid_from IS NULL OR valid_from<=?) AND (valid_to IS NULL OR valid_to>=?) GROUP BY menu_type");
            $q->execute([$now,$now]);
            $menuRows=$q->fetchAll(PDO::FETCH_ASSOC);
        }catch(Throwable $e){ error_log('Polana SEO V164 menu: '.$e->getMessage()); }
        // Nie zgłaszamy nieaktywnych lub brakujących kart.
        foreach($menuRows as $m) {
            $kind=(string)($m['menu_type']??'');
            if(!in_array($kind,['food','soft','wine'],true))continue;
            $url='/menu-seo'.($kind==='food'?'':'?kind='.$kind);
            $add($url,p164_lastmod($m['lastmod']??null));
        }
    }
    $blogEnabled=function_exists('blog_public_enabled') && blog_public_enabled();
    if($blogEnabled && is_file($root.'/blog.php')) {
        // Publikacja zaplanowanych wpisów działa również przy wejściu na sitemap — bez crona.
        if(function_exists('blog_promote_due_posts')) blog_promote_due_posts();
        $posts=[];
        try {
            $posts=db()->query("SELECT slug,updated_at,
              (NULLIF(TRIM(title_en),'') IS NOT NULL AND NULLIF(TRIM(content_en),'') IS NOT NULL) AS en_ready,
              (NULLIF(TRIM(title_de),'') IS NOT NULL AND NULLIF(TRIM(content_de),'') IS NOT NULL) AS de_ready,
              (NULLIF(TRIM(title_es),'') IS NOT NULL AND NULLIF(TRIM(content_es),'') IS NOT NULL) AS es_ready
              FROM blog_posts WHERE status='published' AND publish_at IS NOT NULL AND publish_at<=NOW()
              ORDER BY publish_at DESC,id DESC LIMIT 10000")->fetchAll(PDO::FETCH_ASSOC);
        }catch(Throwable $e){throw new RuntimeException('Brak możliwości odczytu opublikowanych wpisów bloga.',0,$e);}
        $blogLastmod=null;
        foreach($posts as $one) {
            $day=p164_lastmod($one['updated_at']??null);
            if($day!==null && ($blogLastmod===null || $day>$blogLastmod)) $blogLastmod=$day;
        }
        $add('/blog',$blogLastmod);
        foreach($posts as $post) {
            $slug=(string)($post['slug']??'');
            if(!preg_match('/^[a-z0-9-]{1,210}$/',$slug))continue;
            $langs=['pl'];
            foreach(['en','de','es'] as $lang) {
                if((int)($post[$lang.'_ready']??0)===1) $langs[]=$lang;
                else $skipped['unapproved_language']++;
            }
            $add('/blog/'.$slug,p164_lastmod($post['updated_at']??null),false,$langs);
        }
    }
    return ['urls'=>$entries,'entries'=>$entries,'skipped'=>$skipped,'base'=>$base,'splash'=>false];
}
function p164_sitemap_xml(array $data): string {
    $lines=['<?xml version="1.0" encoding="UTF-8"?>',
      '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">'];
    foreach($data['urls'] as $u) {
        $lines[]='  <url>';
        $lines[]='    <loc>'.p164_xml((string)$u['loc']).'</loc>';
        foreach(($u['alternates']??[]) as $lang=>$href) {
            $lines[]='    <xhtml:link rel="alternate" hreflang="'.p164_xml((string)$lang).'" href="'.p164_xml((string)$href).'" />';
        }
        if(!empty($u['lastmod']))$lines[]='    <lastmod>'.p164_xml((string)$u['lastmod']).'</lastmod>';
        $lines[]='  </url>';
    }
    $lines[]='</urlset>';
    return implode("\n",$lines)."\n";
}