<?php

/**
 * Registers the `gtm/nutrition` block on the server.
 */
function gtm_register_block_nutrition() {
	gtm_register_block_type( 'nutrition', [
		'render_callback' => 'gtm_render_block_nutrition',
	] );
}

add_action( 'init', 'gtm_register_block_nutrition', 20 );

/**
 * Renders the `gtm/nutrition` block on the server.
 *
 * @param array    $attributes Block attributes.
 * @param string   $content    Block default content.
 * @param WP_Block $block      Block instance.
 * @return string Returns the nutrition.
 */
function gtm_render_block_nutrition( $attr, $content, $block ) {
	$wrapper_attributes = get_block_wrapper_attributes();
	$inner_html         = '';

	$template_slug = 'nutrition'; // Default template slug
	$template_name = null;

	if ( ! empty( $attr['templateId'] ) ) {
		list( $template_name, $template_slug ) = explode( '//', $attr['templateId'] );
	}

	GTM_Block_Context::begin( $block );
	$inner_html = gtm_do_template_part( $template_slug, $template_name );
	GTM_Block_Context::end();

	// Render only when enable schema
	$nutrition = $attr['nutrition'] ?? [];

	if ( get_option( 'gtm_seo_enable_post_rich_snippets', true ) ) {
		add_filter( 'gtm_nutrition_block_schema', function ( $schema = [] ) use ( $nutrition ) {
			$schema = [
				"@type" => "NutritionInformation",
			];

			// Mapping for attributes and schema props
			$fields = [
				'energy'      => 'calories',
				'carbs'       => 'carbohydrateContent',
				'cholesterol' => 'cholesterolContent',
				'fat'         => 'fatContent',
				'fiber'       => 'fiberContent',
				'protein'     => 'proteinContent',
				'sodium'      => 'sodiumContent',
				'sugars'      => 'sugarContent',
			];

			foreach ( $fields as $field => $prop ) {
				if ( ! empty( $nutrition[$field] ) ) {
					$schema[$prop] = $nutrition[$field];
				}
			}

			return $schema;
		} );
	}

	if ( empty( $inner_html ) ) {
		return gtm_get_admin_warning( sprintf( esc_html__( 'No template available. Please create a template part named "%s" in the full site editor.', 'gutenmate' ), esc_html( $template_slug ) ) ) . $content;
	} else {
		return $inner_html;
	}
}