<?php
namespace ActiveTwist\SEO\Schema;

use ActiveTwist\SEO\Utils\Helpers;

class Generator
{
    public static function generate($post)
    {
        $meta = Helpers::get_post_meta($post->ID);
        $type = !empty($meta['jsonld_type']) ? $meta['jsonld_type'] : 'Article'; // Default type

        $data = [
            '@context' => 'https://schema.org',
            '@type' => $type,
            'mainEntityOfPage' => [
                '@type' => 'WebPage',
                '@id' => get_permalink($post),
            ],
            'headline' => Helpers::get_seo_title($post),
            'description' => Helpers::get_seo_description($post),
            'url' => get_permalink($post),
            'datePublished' => get_the_date('c', $post),
            'dateModified' => get_the_modified_date('c', $post),
        ];

        // Content (Article/BlogPosting only)
        if (in_array($type, ['Article', 'BlogPosting'])) {
            $content = strip_shortcodes($post->post_content);
            $content = wp_strip_all_tags($content);
            $data['articleBody'] = $content;
            $data['wordCount'] = str_word_count($content);
        }

        // Author
        $author_id = $post->post_author;
        $author_schema = [
            '@type' => 'Person',
            'name' => get_the_author_meta('display_name', $author_id),
            'url' => get_author_posts_url($author_id),
        ];

        // Author Job Title
        $job_title = get_the_author_meta('at_seo_job_title', $author_id);
        if ($job_title) {
            $author_schema['jobTitle'] = $job_title;
        }

        // Author SameAs
        $same_as = get_the_author_meta('at_seo_same_as', $author_id);
        if ($same_as) {
            $urls = array_filter(array_map('trim', explode("\n", $same_as)));
            if (!empty($urls)) {
                $author_schema['sameAs'] = array_values($urls);
            }
        }

        $data['author'] = $author_schema;

        // Publisher (Inferred from Site Info)
        $data['publisher'] = [
            '@type' => 'Organization',
            'name' => get_bloginfo('name'),
            'logo' => [
                '@type' => 'ImageObject',
                'url' => get_site_icon_url() ?: home_url('/favicon.ico'), // Fallback
            ]
        ];

        // Image
        $thumb = get_the_post_thumbnail_url($post, 'full');
        if ($thumb) {
            $data['image'] = [
                '@type' => 'ImageObject',
                'url' => $thumb,
            ];
        }

        return $data;
    }

    public static function generate_breadcrumb($post)
    {
        $items = [];
        $position = 1;

        // 1. Home
        $items[] = [
            '@type' => 'ListItem',
            'position' => $position++,
            'name' => 'Home',
            'item' => home_url('/')
        ];

        // 2. Blog Page (for Posts)
        if (get_post_type($post) === 'post') {
            $posts_page_id = get_option('page_for_posts');
            if ($posts_page_id) {
                $items[] = [
                    '@type' => 'ListItem',
                    'position' => $position++,
                    'name' => get_the_title($posts_page_id),
                    'item' => get_permalink($posts_page_id)
                ];
            }
        }

        // 3. Category (for Posts)
        if (get_post_type($post) === 'post') {
            $categories = get_the_category($post->ID);
            if (!empty($categories)) {
                $category = $categories[0]; // Primary (first)
                $items[] = [
                    '@type' => 'ListItem',
                    'position' => $position++,
                    'name' => $category->name,
                    'item' => get_category_link($category->term_id)
                ];
            }
        }

        // 4. Current Page (Leaf)
        $items[] = [
            '@type' => 'ListItem',
            'position' => $position++,
            'name' => get_the_title($post),
            // item is optional for the last item, but good for ID
            'item' => get_permalink($post)
        ];

        return [
            '@context' => 'https://schema.org',
            '@type' => 'BreadcrumbList',
            'itemListElement' => $items
        ];
    }
}