<?php
/**
 * Bootstrap.
 *
 * @package Streetfill
 */

namespace Streetfill;

defined( 'ABSPATH' ) || exit;

/**
 * Plugin bootstrap.
 */
class Plugin {

	/** Provider id shared with the browser script (provider.js). */
	const PROVIDER_ID = 'streetfill-google';

	/**
	 * Hooks.
	 */
	public static function init() {
		// The plugin's own languages folder for a locale WordPress has no file of its own for.
		add_filter( 'lang_dir_for_domain', array( __CLASS__, 'own_translations' ), 5, 3 );
		add_action( 'plugins_loaded', array( __CLASS__, 'loaded' ), 20 );
		add_action( 'switch_blog', array( Settings::class, 'reset' ) );
	}

	/**
	 * Whether WooCommerce is new enough for its own address autocomplete on
	 * classic and block checkout.
	 *
	 * @return bool
	 */
	public static function wc_supported() {
		return function_exists( 'WC' )
			&& defined( 'WC_VERSION' )
			&& version_compare( WC_VERSION, STREETFILL_MIN_WC, '>=' )
			&& class_exists( '\WC_Address_Provider' );
	}

	/**
	 * Starts once WooCommerce is loaded.
	 */
	public static function loaded() {
		if ( is_admin() ) {
			require_once STREETFILL_PATH . 'includes/class-admin.php';
			Admin::init();
		}
		if ( ! self::wc_supported() ) {
			return;
		}

		Assets::init();
		// Without a key there are no suggestions, and the browser's own autofill stays on.
		if ( Settings::has_key() ) {
			require_once STREETFILL_PATH . 'includes/class-provider.php';
			add_filter( 'woocommerce_address_providers', array( __CLASS__, 'register_provider' ) );
		}

		/**
		 * Streetfill is loaded.
		 *
		 * @param string $version Plugin version.
		 * @param string $api     Extension API generation.
		 */
		do_action( 'streetfill_loaded', STREETFILL_VERSION, STREETFILL_API );
	}

	/**
	 * Adds Streetfill to WooCommerce's address providers.
	 *
	 * @param mixed $providers Providers from other plugins.
	 * @return mixed
	 */
	public static function register_provider( $providers ) {
		if ( ! is_array( $providers ) ) {
			return $providers;
		}
		$providers[] = new Provider();
		return $providers;
	}

	/**
	 * The plugin's own languages folder for the `streetfill` text domain, only
	 * while WordPress has no file of its own for the locale.
	 *
	 * @param string|false $path   Folder WordPress found, false for none.
	 * @param string       $domain Text domain.
	 * @param string       $locale Locale.
	 * @return string|false
	 */
	public static function own_translations( $path, $domain, $locale ) {
		if ( 'streetfill' !== $domain || ! is_string( $locale ) || 1 !== preg_match( '/^[a-z]{2,3}(_[A-Z]{2})?(_[a-z0-9]+)?$/', $locale ) ) {
			return $path;
		}
		if ( is_string( $path ) && '' !== $path && self::has_translation( $path, $locale ) ) {
			return $path;
		}
		$own = STREETFILL_PATH . 'languages/';
		return self::has_translation( $own, $locale ) ? $own : $path;
	}

	/**
	 * Whether a folder holds the plugin's translation for a locale.
	 *
	 * @param string $dir    Folder.
	 * @param string $locale Locale.
	 * @return bool
	 */
	private static function has_translation( $dir, $locale ) {
		$dir = trailingslashit( $dir );
		return is_readable( $dir . 'streetfill-' . $locale . '.mo' ) || is_readable( $dir . 'streetfill-' . $locale . '.l10n.php' );
	}
}