<?php
namespace Digiter\BuilderStudio;
defined('ABSPATH') || exit;

/** Custom types opt in; their native WordPress capability objects remain authoritative. */
final class PostTypes {
    public static function all(): array {
        $types=['post','page'];
        foreach(get_post_types(['public'=>true]) as $type){if(post_type_supports($type,'digiter-builder')){$types[]=$type;}}
        $requested=apply_filters('digibl_supported_post_types',$types);$out=['post','page'];
        if(is_array($requested)){
            foreach($requested as $type){
                if(!is_string($type)||in_array($type,['attachment','revision','nav_menu_item','digibl_template'],true)){continue;}
                $object=get_post_type_object($type);
                if($object&&$object->public&&post_type_supports($type,'editor')){$out[]=$type;}
            }
        }
        $out[]='digibl_template';return array_values(array_unique($out));
    }
    /** Parse a bounded server-verifiable embedding path, also for multipart forms. */
    public static function source_chain($raw): ?array {
        if($raw===null||$raw===''){return [];}
        if(is_string($raw)){if(strlen($raw)>1200)return null;$raw=json_decode($raw,true);}
        if(!is_array($raw)||!array_is_list($raw)||count($raw)>3)return null;
        foreach($raw as $link){
            if(!is_array($link)||count($link)!==2||!is_int($link['post']??null)||$link['post']<1||!is_string($link['node']??null)||!preg_match('/^[a-zA-Z0-9_-]{1,80}$/D',$link['node']))return null;
        }
        return $raw;
    }
    private static function published_source(int $id): bool {
        $post=get_post($id);
        return $post&&$post->post_status==='publish'&&$post->post_password===''&&get_post_meta($id,'_digibl_published',true)
            &&($post->post_type==='digibl_template'||(in_array($post->post_type,self::all(),true)&&is_post_type_viewable($post->post_type)));
    }
    /** Validate every published, visible reusable edge from its direct public host. */
    public static function public_source(int $id,array $chain=[]): bool {
        if(!self::published_source($id)||self::source_chain($chain)===null)return false;
        if(!$chain)return get_post_type($id)!=='digibl_template'||ThemeBuilder::is_assigned_source($id);
        if(!self::public_source($chain[0]['post']))return false;
        $seen=[$id];
        foreach($chain as $index=>$link){
            $source=$link['post'];if(in_array($source,$seen,true)||!self::published_source($source))return false;$seen[]=$source;
            $doc=Document::clean(json_decode(get_post_meta($source,'_digibl_published',true),true));if(is_wp_error($doc))return false;
            $target=$chain[$index+1]['post']??$id;
            $scan=function(array $nodes)use(&$scan,$link,$target,$source): bool {
                foreach($nodes as $node){
                    if(!ContentQuery::visible($node['style'],$source))continue;
                    if($node['id']===$link['node'])return $node['type']==='reusable'&&(int)$node['props']['postId']===$target;
                    // Dynamic document boundaries cannot attest a reusable edge in this document.
                    if(in_array($node['type'],['reusable','loop','data-repeater','component','mega-menu'],true))continue;
                    if($scan($node['children']))return true;
                }return false;
            };
            if(!$scan($doc['nodes']))return false;
        }
        return true;
    }
    public static function can_edit(): bool {
        foreach(self::all() as $type){$object=get_post_type_object($type);if($object&&current_user_can($object->cap->edit_posts)){return true;}}
        return false;
    }
    public static function menu_capability(): string {
        foreach(self::all() as $type){$object=get_post_type_object($type);if($object&&current_user_can($object->cap->edit_posts)){return $object->cap->edit_posts;}}
        return 'edit_posts';
    }
}