<?php
namespace Akram;

defined( 'ABSPATH' ) || exit;

/**
 * Dynamic tags. Payload: { t: tag, k: text|url|urlenc|html, f: fallback, b: before, a: after, o: args }
 */
final class Dynamic {

	public static function replace_tokens( $html ) {
		if ( false === strpos( $html, '{{nx:' ) ) {
			return $html;
		}
		return preg_replace_callback(
			'/\{\{nx:([A-Za-z0-9+\/=]+)\}\}/',
			static function ( $m ) {
				$payload = json_decode( (string) base64_decode( $m[1] ), true );
				return is_array( $payload ) ? self::resolve( $payload ) : '';
			},
			$html
		);
	}

	public static function resolve( array $p ) {
		$kind = (string) ( $p['k'] ?? 'text' );
		$val  = self::value( (string) ( $p['t'] ?? '' ), (array) ( $p['o'] ?? array() ) );
		if ( '' === (string) $val || null === $val || false === $val ) {
			$val = (string) ( $p['f'] ?? '' );
			if ( '' === $val ) {
				return '';
			}
		} else {
			$val = (string) ( $p['b'] ?? '' ) . $val . (string) ( $p['a'] ?? '' );
		}
		switch ( $kind ) {
			case 'url':
				return esc_url( $val );
			case 'urlenc':
				return rawurlencode( $val );
			case 'html':
				return wp_kses_post( $val );
			default:
				return esc_html( $val );
		}
	}

	public static function catalog() {
		$c = array(
			'post'    => array(
				'post_title'         => 'Title',
				'post_excerpt'       => 'Excerpt',
				'post_content'       => 'Content',
				'post_date'          => 'Date',
				'post_modified'      => 'Last modified',
				'permalink'          => 'URL',
				'post_id'            => 'ID',
				'featured_image'     => 'Featured image',
				'featured_image_alt' => 'Featured image alt',
				'post_terms'         => 'Terms',
				'comments_count'     => 'Comments count',
				'reading_time'       => 'Reading time',
				'post_meta'          => 'Custom field',
			),
			'author'  => array(
				'author_name'   => 'Author name',
				'author_bio'    => 'Author bio',
				'author_avatar' => 'Author avatar',
				'author_url'    => 'Author archive URL',
			),
			'site'    => array(
				'site_title'   => 'Site title',
				'site_tagline' => 'Tagline',
				'site_url'     => 'Home URL',
				'site_logo'    => 'Site logo',
				'page_title'   => 'Document title',
				'current_date' => 'Current date',
				'current_year' => 'Current year',
			),
			'archive' => array(
				'archive_title' => 'Archive title',
				'archive_desc'  => 'Archive description',
				'search_query'  => 'Search query',
			),
			'user'    => array(
				'user_name'       => 'Display name',
				'user_first_name' => 'First name',
				'user_email'      => 'Email',
			),
			'other'   => array(
				'request_param' => 'URL parameter',
				'shortcode'     => 'Shortcode output',
			),
		);
		if ( function_exists( 'get_field' ) ) {
			$c['post']['acf'] = 'ACF field';
		}
		if ( Options::has_woo() ) {
			$c['woocommerce'] = array(
				'woo_price'      => 'Price',
				'woo_sku'        => 'SKU',
				'woo_stock'      => 'Stock status',
				'woo_rating'     => 'Rating',
				'woo_sale_badge' => 'Sale percentage',
			);
		}
		return apply_filters( 'akram_dynamic_catalog', $c );
	}

	public static function value( $tag, array $o ) {
		$id = get_the_ID();
		switch ( $tag ) {
			case 'post_title':
				return $id ? get_the_title( $id ) : '';
			case 'post_excerpt':
				return $id ? wp_trim_words( get_the_excerpt( $id ), (int) ( $o['words'] ?? 55 ) ) : '';
			case 'post_content':
				return $id ? apply_filters( 'the_content', get_post_field( 'post_content', $id ) ) : ''; // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound -- core or third-party hook.
			case 'post_date':
				return $id ? get_the_date( $o['format'] ?? '', $id ) : '';
			case 'post_modified':
				return $id ? get_the_modified_date( $o['format'] ?? '', $id ) : '';
			case 'permalink':
				return $id ? get_permalink( $id ) : home_url( add_query_arg( array() ) );
			case 'post_id':
				return (string) $id;
			case 'featured_image':
				$url = $id ? get_the_post_thumbnail_url( $id, $o['size'] ?? 'large' ) : '';
				return $url ?: '';
			case 'featured_image_alt':
				$tid = $id ? get_post_thumbnail_id( $id ) : 0;
				return $tid ? get_post_meta( $tid, '_wp_attachment_image_alt', true ) : '';
			case 'post_terms':
				$terms = $id ? get_the_terms( $id, sanitize_key( $o['tax'] ?? 'category' ) ) : array();
				return is_array( $terms ) ? implode( (string) ( $o['sep'] ?? ', ' ), wp_list_pluck( $terms, 'name' ) ) : '';
			case 'comments_count':
				return $id ? (string) get_comments_number( $id ) : '0';
			case 'reading_time':
				$words = $id ? str_word_count( wp_strip_all_tags( get_post_field( 'post_content', $id ) ) ) : 0;
				/* translators: %d: minutes */
				return sprintf( _n( '%d min read', '%d min read', max( 1, (int) ceil( $words / 220 ) ), 'akram' ), max( 1, (int) ceil( $words / 220 ) ) );
			case 'post_meta':
				$v = $id && ! empty( $o['key'] ) && ! is_protected_meta( (string) $o['key'], 'post' ) ? get_post_meta( $id, sanitize_text_field( $o['key'] ), true ) : '';
				return is_scalar( $v ) ? (string) $v : '';
			case 'acf':
				if ( ! function_exists( 'get_field' ) || empty( $o['key'] ) ) {
					return '';
				}
				$v = get_field( sanitize_text_field( $o['key'] ), $id );
				if ( is_array( $v ) ) {
					return $v['url'] ?? ( $v['title'] ?? implode( ', ', array_filter( $v, 'is_scalar' ) ) );
				}
				return (string) $v;
			case 'author_name':
				$a = (int) get_post_field( 'post_author', $id );
				return $a ? get_the_author_meta( 'display_name', $a ) : '';
			case 'author_bio':
				return get_the_author_meta( 'description', (int) get_post_field( 'post_author', $id ) );
			case 'author_avatar':
				return get_avatar_url( (int) get_post_field( 'post_author', $id ), array( 'size' => (int) ( $o['size'] ?? 96 ) ) );
			case 'author_url':
				return get_author_posts_url( (int) get_post_field( 'post_author', $id ) );
			case 'site_title':
				return get_bloginfo( 'name' );
			case 'site_tagline':
				return get_bloginfo( 'description' );
			case 'site_url':
				return home_url( '/' );
			case 'site_logo':
				$logo = (int) get_theme_mod( 'custom_logo' );
				return $logo ? wp_get_attachment_image_url( $logo, 'full' ) : '';
			case 'page_title':
				return wp_get_document_title();
			case 'current_date':
				return wp_date( $o['format'] ?? get_option( 'date_format' ) );
			case 'current_year':
				return wp_date( 'Y' );
			case 'archive_title':
				return wp_strip_all_tags( get_the_archive_title() );
			case 'archive_desc':
				return wp_strip_all_tags( get_the_archive_description() );
			case 'search_query':
				return get_search_query();
			case 'user_name':
				return is_user_logged_in() ? wp_get_current_user()->display_name : '';
			case 'user_first_name':
				return is_user_logged_in() ? wp_get_current_user()->first_name : '';
			case 'user_email':
				return is_user_logged_in() ? wp_get_current_user()->user_email : '';
			case 'request_param':
				$k = sanitize_key( $o['key'] ?? '' );
				return $k && isset( $_GET[ $k ] ) ? sanitize_text_field( wp_unslash( $_GET[ $k ] ) ) : ''; // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- read-only request value; it changes nothing and is sanitised.
			case 'shortcode':
				return ! empty( $o['code'] ) ? do_shortcode( (string) $o['code'] ) : '';
			case 'woo_price':
			case 'woo_sku':
			case 'woo_stock':
			case 'woo_rating':
			case 'woo_sale_badge':
				if ( ! function_exists( 'wc_get_product' ) ) {
					return '';
				}
				$p = wc_get_product( $id );
				if ( ! $p ) {
					return '';
				}
				if ( 'woo_price' === $tag ) {
					return wp_strip_all_tags( wc_price( (float) $p->get_price() ) );
				}
				if ( 'woo_sku' === $tag ) {
					return $p->get_sku();
				}
				if ( 'woo_stock' === $tag ) {
					return $p->is_in_stock() ? __( 'In stock', 'akram' ) : __( 'Out of stock', 'akram' );
				}
				if ( 'woo_rating' === $tag ) {
					return (string) $p->get_average_rating();
				}
				$reg = (float) $p->get_regular_price();
				$sale = (float) $p->get_sale_price();
				return $p->is_on_sale() && $reg > 0 ? '-' . round( ( 1 - $sale / $reg ) * 100 ) . '%' : '';
		}
		return (string) apply_filters( 'akram_dynamic_value', '', $tag, $o, $id );
	}
}