<?php
/**
 * Yoast SEO (and Yoast SEO Premium).
 *
 * @package AiRankSuite
 */

declare(strict_types=1);

namespace AiRankSuite\Modules\ImportExport\Adapters;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Post data in individual meta keys, term data in one big `wpseo_taxonomy_meta`
 * option keyed taxonomy → term id, settings across `wpseo_titles` and
 * `wpseo_social`. Premium adds redirects in `wpseo-premium-redirects-base`.
 */
final class Yoast extends Adapter {

	public function id(): string {
		return 'yoast';
	}

	public function label(): string {
		return 'Yoast SEO';
	}

	public function active(): bool {
		return defined( 'WPSEO_VERSION' );
	}

	protected function post_meta_keys(): array {
		return array( '_yoast_wpseo_title', '_yoast_wpseo_metadesc', '_yoast_wpseo_focuskw', '_yoast_wpseo_canonical', '_yoast_wpseo_meta-robots-noindex', '_yoast_wpseo_opengraph-title', '_yoast_wpseo_opengraph-description', '_yoast_wpseo_twitter-title', '_yoast_wpseo_bctitle' );
	}

	protected function has_settings(): bool {
		return array() !== $this->option( 'wpseo_titles' ) || array() !== $this->option( 'wpseo_social' );
	}

	public function counts(): array {
		$counts             = parent::counts();
		$counts['terms']    = $this->count_terms();
		$counts['redirects'] = count( $this->redirect_rows() );
		return $counts;
	}

	private function count_terms(): int {
		$n = 0;
		foreach ( $this->option( 'wpseo_taxonomy_meta' ) as $terms ) {
			foreach ( (array) $terms as $meta ) {
				if ( is_array( $meta ) && ( '' !== (string) ( $meta['wpseo_title'] ?? '' ) || '' !== (string) ( $meta['wpseo_desc'] ?? '' ) || '' !== (string) ( $meta['wpseo_noindex'] ?? '' ) ) ) {
					++$n;
				}
			}
		}
		return $n;
	}

	public function term_ids( int $after, int $limit ): array {
		$ids = array();
		foreach ( $this->option( 'wpseo_taxonomy_meta' ) as $terms ) {
			foreach ( (array) $terms as $term_id => $meta ) {
				if ( (int) $term_id > $after && is_array( $meta ) && array() !== array_filter( $meta ) ) {
					$ids[] = (int) $term_id;
				}
			}
		}
		sort( $ids );
		return array_slice( array_values( array_unique( $ids ) ), 0, max( 1, $limit ) );
	}

	public function post_record( int $post_id ): array {
		$robots = array();
		if ( '1' === $this->meta( $post_id, '_yoast_wpseo_meta-robots-noindex' ) ) {
			$robots[] = 'noindex';
		}
		if ( '1' === $this->meta( $post_id, '_yoast_wpseo_meta-robots-nofollow' ) ) {
			$robots[] = 'nofollow';
		}
		// The "advanced" field is a comma list of noarchive/nosnippet/noimageindex.
		$robots = array_values( array_unique( array_merge( $robots, $this->robots_from( $this->meta( $post_id, '_yoast_wpseo_meta-robots-adv' ) ) ) ) );

		$keywords = array();
		$focus    = $this->meta( $post_id, '_yoast_wpseo_focuskw' );
		if ( '' !== $focus ) {
			$keywords[] = $focus;
		}
		// Premium keeps the additional keyphrases as JSON.
		$related = get_post_meta( $post_id, '_yoast_wpseo_focuskeywords', true );
		$decoded = is_string( $related ) && '' !== $related ? json_decode( $related, true ) : null;
		foreach ( (array) $decoded as $row ) {
			if ( is_array( $row ) && '' !== (string) ( $row['keyword'] ?? '' ) ) {
				$keywords[] = trim( (string) $row['keyword'] );
			}
		}

		$redirect = array();
		$target   = $this->meta( $post_id, '_yoast_wpseo_redirect' );
		if ( '' !== $target ) {
			$redirect = array( 'target' => $target, 'type' => 301 );
		}

		return $this->clean(
			array(
				'title'            => $this->vars( $this->meta( $post_id, '_yoast_wpseo_title' ) ),
				'desc'             => $this->vars( $this->meta( $post_id, '_yoast_wpseo_metadesc' ) ),
				'keywords'         => array_values( array_unique( array_filter( $keywords ) ) ),
				'canonical'        => $this->meta( $post_id, '_yoast_wpseo_canonical' ),
				'robots'           => $robots,
				'breadcrumb_title' => $this->meta( $post_id, '_yoast_wpseo_bctitle' ),
				'social'           => array(
					'og_title' => $this->meta( $post_id, '_yoast_wpseo_opengraph-title' ),
					'og_desc'  => $this->meta( $post_id, '_yoast_wpseo_opengraph-description' ),
					'og_image' => $this->meta( $post_id, '_yoast_wpseo_opengraph-image' ),
					'tw_title' => $this->meta( $post_id, '_yoast_wpseo_twitter-title' ),
					'tw_desc'  => $this->meta( $post_id, '_yoast_wpseo_twitter-description' ),
					'tw_image' => $this->meta( $post_id, '_yoast_wpseo_twitter-image' ),
				),
				'redirect'         => $redirect,
			)
		);
	}

	public function term_record( int $term_id ): array {
		foreach ( $this->option( 'wpseo_taxonomy_meta' ) as $terms ) {
			$meta = (array) ( $terms[ $term_id ] ?? $terms[ (string) $term_id ] ?? array() );
			if ( empty( $meta ) ) {
				continue;
			}
			return $this->clean(
				array(
					'title'     => $this->vars( (string) ( $meta['wpseo_title'] ?? '' ) ),
					'desc'      => $this->vars( (string) ( $meta['wpseo_desc'] ?? '' ) ),
					'canonical' => (string) ( $meta['wpseo_canonical'] ?? '' ),
					'robots'    => $this->robots_from( (string) ( $meta['wpseo_noindex'] ?? '' ) ),
					'keywords'  => array_values( array_filter( array( trim( (string) ( $meta['wpseo_focuskw'] ?? '' ) ) ) ) ),
					'social'    => array(
						'og_title' => (string) ( $meta['wpseo_opengraph-title'] ?? '' ),
						'og_desc'  => (string) ( $meta['wpseo_opengraph-description'] ?? '' ),
						'og_image' => (string) ( $meta['wpseo_opengraph-image'] ?? '' ),
					),
				)
			);
		}
		return array();
	}

	public function settings(): array {
		$titles = $this->option( 'wpseo_titles' );
		$social = $this->option( 'wpseo_social' );
		if ( empty( $titles ) && empty( $social ) ) {
			return array();
		}
		$out = array(
			'separator'  => \AiRankSuite\Modules\ImportExport\Services\Variables::separator( (string) ( $titles['separator'] ?? '' ) ),
			'home_title' => $this->vars( (string) ( $titles['title-home-wpseo'] ?? '' ) ),
			'home_desc'  => $this->vars( (string) ( $titles['metadesc-home-wpseo'] ?? '' ) ),
		);

		$templates    = array();
		$noindex_pt   = array();
		foreach ( get_post_types( array( 'public' => true ) ) as $type ) {
			$title = $this->vars( (string) ( $titles[ 'title-' . $type ] ?? '' ) );
			$desc  = $this->vars( (string) ( $titles[ 'metadesc-' . $type ] ?? '' ) );
			if ( '' !== $title || '' !== $desc ) {
				$templates[ $type ] = array( 'title' => $title, 'desc' => $desc );
			}
			if ( ! empty( $titles[ 'noindex-' . $type ] ) ) {
				$noindex_pt[] = $type;
			}
		}
		$tax_templates = array();
		$noindex_tax   = array();
		foreach ( get_taxonomies( array( 'public' => true ) ) as $tax ) {
			$title = $this->vars( (string) ( $titles[ 'title-tax-' . $tax ] ?? '' ) );
			$desc  = $this->vars( (string) ( $titles[ 'metadesc-tax-' . $tax ] ?? '' ) );
			if ( '' !== $title || '' !== $desc ) {
				$tax_templates[ $tax ] = array( 'title' => $title, 'desc' => $desc );
			}
			if ( ! empty( $titles[ 'noindex-tax-' . $tax ] ) ) {
				$noindex_tax[] = $tax;
			}
		}

		$out['templates']          = $templates;
		$out['noindex_types']      = $noindex_pt;
		$out['taxonomy_templates'] = $tax_templates;
		$out['noindex_taxonomies'] = $noindex_tax;
		$out['author_title']       = $this->vars( (string) ( $titles['title-author-wpseo'] ?? '' ) );
		$out['author_desc']        = $this->vars( (string) ( $titles['metadesc-author-wpseo'] ?? '' ) );
		$out['author_noindex']     = ! empty( $titles['noindex-author-wpseo'] );
		$out['author_enabled']     = empty( $titles['disable-author'] );
		$out['date_noindex']       = ! empty( $titles['noindex-archive-wpseo'] );
		$out['date_enabled']       = empty( $titles['disable-date'] );
		$out['search_title']       = $this->vars( (string) ( $titles['title-search-wpseo'] ?? '' ) );
		$out['notfound_title']     = $this->vars( (string) ( $titles['title-404-wpseo'] ?? '' ) );
		$out['attachment_redirect'] = ! empty( $titles['disable-attachment'] );
		$out['og_default_image']   = (string) ( $social['og_default_image'] ?? '' );
		$out['twitter_site']       = ltrim( (string) ( $social['twitter_site'] ?? '' ), '@' );
		$out['twitter_card']       = 'summary' === (string) ( $social['twitter_card_type'] ?? '' ) ? 'summary' : 'summary_large_image';
		$out['facebook_app_id']    = (string) ( $social['fbadminapp'] ?? '' );
		$out['organisation']       = array(
			'name' => (string) ( $titles['company_name'] ?? '' ),
			'logo' => (string) ( $titles['company_logo'] ?? '' ),
			'type' => 'person' === (string) ( $titles['company_or_person'] ?? '' ) ? 'person' : 'organization',
		);
		$out['social_profiles']    = array_values(
			array_filter(
				array(
					(string) ( $social['facebook_site'] ?? '' ),
					'' !== (string) ( $social['twitter_site'] ?? '' ) ? 'https://twitter.com/' . ltrim( (string) $social['twitter_site'], '@' ) : '',
					(string) ( $social['instagram_url'] ?? '' ),
					(string) ( $social['linkedin_url'] ?? '' ),
					(string) ( $social['youtube_url'] ?? '' ),
				)
			)
		);
		return $out;
	}

	/**
	 * @return array<int, array<string, mixed>>
	 */
	private function redirect_rows(): array {
		$stored = get_option( 'wpseo-premium-redirects-base', array() );
		return is_array( $stored ) ? array_values( $stored ) : array();
	}

	public function redirects( int $after, int $limit ): array {
		$out = array();
		foreach ( array_slice( $this->redirect_rows(), $after, max( 1, $limit ) ) as $i => $row ) {
			$origin = (string) ( $row['origin'] ?? '' );
			$url    = (string) ( $row['url'] ?? '' );
			if ( '' === $origin ) {
				continue;
			}
			$out[] = array(
				'id'     => $after + $i + 1,
				'source' => $origin,
				'target' => $url,
				'type'   => (int) ( $row['type'] ?? 301 ),
			);
		}
		return $out;
	}
}