<?php
/**
 * Front-end assets.
 *
 * @package Fillaro
 */

namespace Fillaro\Render;

defined( 'ABSPATH' ) || exit;

/**
 * Registers the front-end script and style and loads them only on pages
 * that show a form.
 */
class Assets {

	const HANDLE = 'fillaro-frontend';

	/**
	 * Register hooks.
	 */
	public function register() {
		add_action( 'init', array( __CLASS__, 'register_assets' ) );
		add_action( 'wp_enqueue_scripts', array( $this, 'maybe_enqueue_early' ) );
	}

	/**
	 * Register script and style handles.
	 */
	public static function register_assets() {
		$asset = self::asset_file( 'frontend' );

		wp_register_style( self::HANDLE, FILLARO_URL . 'build/frontend.css', array(), $asset['version'] );
		wp_style_add_data( self::HANDLE, 'rtl', 'replace' );
		wp_register_script(
			self::HANDLE,
			FILLARO_URL . 'build/frontend.js',
			array(),
			$asset['version'],
			array(
				'in_footer' => true,
				'strategy'  => 'defer',
			)
		);

		$config = array(
			'restUrl' => esc_url_raw( rest_url( 'fillaro/v1/' ) ),
			'i18n'    => array(
				'required' => __( 'This field is required.', 'fillaro' ),
				'email'    => __( 'Enter a valid email address.', 'fillaro' ),
				'url'      => __( 'Enter a valid web address.', 'fillaro' ),
				'number'   => __( 'Enter a number.', 'fillaro' ),
				'fix'      => __( 'Please fix the highlighted fields.', 'fillaro' ),
				'network'  => __( 'Connection problem. Check your internet and try again.', 'fillaro' ),
				'sending'  => __( 'Sending…', 'fillaro' ),
			),
		);
		if ( is_user_logged_in() ) {
			// Logged-in REST requests need a nonce, or WordPress treats them as guests.
			$config['nonce'] = wp_create_nonce( 'wp_rest' );
		}
		wp_add_inline_script( self::HANDLE, 'window.fillaroConfig = ' . wp_json_encode( $config ) . ';', 'before' );
	}

	/**
	 * Enqueue in the head when the current post contains a form, so the
	 * style loads before the form paints.
	 */
	public function maybe_enqueue_early() {
		$post = get_post();
		if ( $post && ( has_shortcode( $post->post_content, 'fillaro' ) || has_block( 'fillaro/form', $post ) ) ) {
			self::enqueue();
		}
	}

	/**
	 * Enqueue the front-end assets.
	 */
	public static function enqueue() {
		wp_enqueue_style( self::HANDLE );
		wp_enqueue_script( self::HANDLE );
	}

	/**
	 * Read a build/*.asset.php file.
	 *
	 * @param string $name Entry name.
	 * @return array{dependencies:array,version:string}
	 */
	public static function asset_file( $name ) {
		$path = FILLARO_DIR . 'build/' . $name . '.asset.php';
		if ( is_readable( $path ) ) {
			$asset = require $path;
			if ( is_array( $asset ) ) {
				return $asset;
			}
		}
		return array(
			'dependencies' => array(),
			'version'      => FILLARO_VERSION,
		);
	}
}