<?php
/**
 * Epi functions and definitions
 *
 * @link https://developer.wordpress.org/themes/basics/theme-functions/
 *
 * @package Epi
 * @since Epi 1.0
 */

 declare( strict_types = 1 );

if ( ! function_exists( 'epi_support' ) ) :

	/**
	 * Sets up theme defaults and registers support for various WordPress features.
	 *
	 * @since Epi 1.0
	 *
	 * @return void
	 */
	function epi_support() {

		// Enqueue editor styles.
		add_editor_style( 'style.css' );

		// Make theme available for translation.
		load_theme_textdomain( 'epi' );
	}

endif;

add_action( 'after_setup_theme', 'epi_support' );

if ( ! function_exists( 'epi_styles' ) ) :

	/**
	 * Enqueue styles.
	 *
	 * @since Epi 1.0
	 *
	 * @return void
	 */
	function epi_styles() {

		// Register theme stylesheet.
		wp_register_style(
			'epi-style',
			get_stylesheet_directory_uri() . '/style.css',
			array(),
			wp_get_theme()->get( 'Version' )
		);

		// Enqueue theme stylesheet.
		wp_enqueue_style( 'epi-style' );

	}

endif;

add_action( 'wp_enqueue_scripts', 'epi_styles' );

if ( ! function_exists( 'epi_is_woocommerce_active' ) ) :

	/**
	 * Check whether WooCommerce is active.
	 *
	 * @since Epi 1.0
	 *
	 * @return bool
	 */
	function epi_is_woocommerce_active(): bool {
		return class_exists( 'WooCommerce' );
	}

endif;

if ( ! function_exists( 'epi_get_woocommerce_template_slugs' ) ) :

	/**
	 * Get WooCommerce block template slugs bundled with the theme.
	 *
	 * @since Epi 1.0
	 *
	 * @return string[]
	 */
	function epi_get_woocommerce_template_slugs(): array {
		return array(
			'archive-product',
			'page-cart',
			'order-confirmation',
			'product-search-results',
			'single-product',
			'taxonomy-product_cat',
			'taxonomy-product_tag',
		);
	}

endif;

if ( ! function_exists( 'epi_get_woocommerce_pattern_slugs' ) ) :

	/**
	 * Get WooCommerce block pattern slugs bundled with the theme.
	 *
	 * @since Epi 1.0
	 *
	 * @return string[]
	 */
	function epi_get_woocommerce_pattern_slugs(): array {
		return array(
			'epi/cart',
		);
	}

endif;

if ( ! function_exists( 'epi_filter_woocommerce_block_templates' ) ) :

	/**
	 * Hide WooCommerce block templates when WooCommerce is inactive.
	 *
	 * @since Epi 1.0
	 *
	 * @param \WP_Block_Template[] $templates     The list of templates.
	 * @param array                $query         Arguments to retrieve templates.
	 * @param string               $template_type Template type.
	 *
	 * @return \WP_Block_Template[]
	 */
	function epi_filter_woocommerce_block_templates( array $templates, array $query, string $template_type ): array {
		if ( epi_is_woocommerce_active() || 'wp_template' !== $template_type ) {
			return $templates;
		}

		$slugs = epi_get_woocommerce_template_slugs();

		foreach ( $templates as $key => $template ) {
			if ( in_array( $template->slug, $slugs, true ) ) {
				unset( $templates[ $key ] );
			}
		}

		return array_values( $templates );
	}

endif;

add_filter( 'get_block_templates', 'epi_filter_woocommerce_block_templates', 99, 3 );

if ( ! function_exists( 'epi_filter_woocommerce_theme_json' ) ) :

	/**
	 * Hide WooCommerce templates from theme.json when WooCommerce is inactive.
	 *
	 * @since Epi 1.0
	 *
	 * @param \WP_Theme_JSON_Data $theme_json Theme JSON data.
	 *
	 * @return \WP_Theme_JSON_Data
	 */
	function epi_filter_woocommerce_theme_json( $theme_json ) {
		if ( epi_is_woocommerce_active() ) {
			return $theme_json;
		}

		$data = $theme_json->get_data();

		$data['customTemplates'] = array_values(
			array_filter(
				$data['customTemplates'] ?? array(),
				function ( $template ) {
					return ! in_array( $template['name'], epi_get_woocommerce_template_slugs(), true );
				}
			)
		);

		/*
		 * Return a fresh data object rather than update_with(): WP_Theme_JSON::merge()
		 * unions sequential arrays such as customTemplates by index, so update_with()
		 * can add entries but never remove them. The resolver consumes the returned
		 * object's data directly, so rebuilding from the reduced set drops the
		 * WooCommerce templates as intended.
		 */
		return new WP_Theme_JSON_Data( $data, 'theme' );
	}

endif;

add_filter( 'wp_theme_json_data_theme', 'epi_filter_woocommerce_theme_json' );

if ( ! function_exists( 'epi_unregister_woocommerce_patterns' ) ) :

	/**
	 * Unregister WooCommerce block patterns when WooCommerce is inactive.
	 *
	 * @since Epi 1.0
	 *
	 * @return void
	 */
	function epi_unregister_woocommerce_patterns() {
		if ( epi_is_woocommerce_active() ) {
			return;
		}

		foreach ( epi_get_woocommerce_pattern_slugs() as $pattern_slug ) {
			$pattern = \WP_Block_Patterns_Registry::get_instance()->get_registered( $pattern_slug );
			if ( $pattern ) {
				unregister_block_pattern( $pattern_slug );
			}
		}
	}

endif;

add_action( 'init', 'epi_unregister_woocommerce_patterns', 20 );
add_action( 'wp_loaded', 'epi_unregister_woocommerce_patterns' );