<?php
/**
 * Plugin Name:       Welcoma Accessibility – WCAG, ADA & EAA Accessibility Widget
 * Plugin URI:        https://welcoma.app/
 * Description:       Accessibility widget with A11y profiles, keyboard navigation, text and contrast controls, multilingual UI, and accessibility statements.
 * Version:           1.0.4
 * Requires at least: 6.2
 * Requires PHP:      7.2
 * Author:            webAufstieg GmbH
 * Author URI:        https://webaufstieg.de/
 * License:           GPL-2.0-or-later
 * License URI:       https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain:       welcoma-accessibility-widget
 *
 * @package Welcoma_Widget
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Plugin constants.
 */
define( 'WELCOMA_WIDGET_VERSION', '1.0.4' );
define( 'WELCOMA_WIDGET_FILE', __FILE__ );
define( 'WELCOMA_WIDGET_PATH', plugin_dir_path( __FILE__ ) );
define( 'WELCOMA_WIDGET_URL', plugin_dir_url( __FILE__ ) );
define( 'WELCOMA_WIDGET_BASENAME', plugin_basename( __FILE__ ) );
define( 'WELCOMA_WIDGET_OPTION', 'welcoma_settings' );
define( 'WELCOMA_WIDGET_STATEMENT_OPTION', 'welcoma_statement' );
define( 'WELCOMA_WIDGET_FOOTER_BRAND_OPTION', 'welcoma_footer_brand_text' );


/**
 * Core includes.
 */
require_once WELCOMA_WIDGET_PATH . 'includes/modules.php';
require_once WELCOMA_WIDGET_PATH . 'includes/class-welcoma.php';
require_once WELCOMA_WIDGET_PATH . 'includes/class-welcoma-settings.php';
require_once WELCOMA_WIDGET_PATH . 'includes/class-welcoma-admin.php';
require_once WELCOMA_WIDGET_PATH . 'includes/class-welcoma-frontend.php';
require_once WELCOMA_WIDGET_PATH . 'includes/class-welcoma-translator.php';

/**
 * Map a WordPress locale string to a supported widget language code.
 *
 * Examples:
 *   'pt_BR'  → 'pt-br'
 *   'zh_CN'  → 'zh-CN'
 *   'de_DE'  → 'de'
 *   'hi_IN'  → 'hi'
 *   'en_US'  → 'en'  (falls back — English not in LANGUAGES list)
 *   'xx_XX'  → 'en'  (unsupported locale fallback)
 *
 * @param string $locale WordPress locale string from determine_locale().
 * @return string        Supported widget language code, or 'en' as fallback.
 */
function welcoma_widget_locale_to_lang( $locale ) {
	$supported = array_keys( Welcoma_Translator::LANGUAGES );

	// Normalise underscores to hyphens and lowercase: 'pt_BR' → 'pt-br'.
	$normalised = strtolower( str_replace( '_', '-', $locale ) );

	// Special case: restore correct casing for 'zh-CN' before any comparison.
	if ( 'zh-cn' === $normalised ) {
		return 'zh-CN';
	}

	// 1. Exact match (e.g. 'pt-br', 'de', 'fr').
	if ( in_array( $normalised, $supported, true ) ) {
		return $normalised;
	}

	// 2. Prefix match: 'de-de' → 'de', 'hi-in' → 'hi'.
	$prefix = substr( $normalised, 0, 2 );
	if ( in_array( $prefix, $supported, true ) ) {
		return $prefix;
	}

	// 3. No match — widget defaults to English.
	return 'en';
}

/**
 * Fixed footer brand text for every supported widget language.
 * Not user-editable; Pro can only show or hide it.
 *
 * @return array<string,string> Language code => brand text.
 */
/**
 * File name of a front-end asset: the minified build (name.min.js / name.min.css, created by
 * the release workflow) unless SCRIPT_DEBUG is on or no build exists (development checkout).
 *
 * @param string $file File name in public/js or public/css, e.g. 'welcoma-widget.js'.
 * @param string $base Plugin directory that contains public/ (defaults to this plugin).
 * @return string
 */
function welcoma_widget_asset( $file, $base = '' ) {
	if ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) {
		return $file;
	}
	$base = $base ? $base : plugin_dir_path( __FILE__ );
	$dir  = '.css' === substr( $file, -4 ) ? 'public/css/' : 'public/js/';
	$min  = preg_replace( '/\.(js|css)$/', '.min.$1', $file );
	return is_readable( trailingslashit( $base ) . $dir . $min ) ? $min : $file;
}

function welcoma_widget_footer_brand_defaults() {
	return array(
		'en'    => 'Web Accessibility by Welcoma',
		'de'    => 'Web-Barrierefreiheit von Welcoma',
		'es'    => 'Accesibilidad web por Welcoma',
		'fr'    => 'Accessibilité Web par Welcoma',
		'it'    => 'Accessibilità web di Welcoma',
		'pt'    => 'Acessibilidade Web por Welcoma',
		'pt-br' => 'Acessibilidade Web por Welcoma',
		'nl'    => 'Webtoegankelijkheid door Welcoma',
		'pl'    => 'Dostępność internetowa od Welcoma',
		'cs'    => 'Webová přístupnost od Welcoma',
		'hu'    => 'Webes akadálymentesítés: Welcoma',
		'ro'    => 'Accesibilitate web de la Welcoma',
		'tr'    => 'Welcoma ile Web Erişilebilirliği',
		'ru'    => 'Веб-доступность от Welcoma',
		'uk'    => 'Веб-доступність від Welcoma',
		'ar'    => 'إمكانية الوصول إلى الويب بواسطة Welcoma',
		'he'    => 'נגישות אינטרנט מבית Welcoma',
		'hi'    => 'Welcoma द्वारा वेब एक्सेसिबिलिटी',
		'id'    => 'Aksesibilitas Web oleh Welcoma',
		'th'    => 'การเข้าถึงเว็บโดย Welcoma',
		'vi'    => 'Khả năng truy cập web bởi Welcoma',
		'ja'    => 'Welcoma によるウェブアクセシビリティ',
		'ko'    => 'Welcoma의 웹 접근성',
		'zh-CN' => 'Welcoma 提供的网页无障碍服务',
		'sv'    => 'Webbtillgänglighet av Welcoma',
		'fi'    => 'Web-saavutettavuus: Welcoma',
	);
}

/**
 * Add or update the footer brand option so it always matches the bundled
 * strings. Runs on activation and on every load (cheap no-op when unchanged),
 * which also covers plugin updates.
 */
function welcoma_widget_sync_footer_brand() {
	$texts = welcoma_widget_footer_brand_defaults();

	if ( false === get_option( WELCOMA_WIDGET_FOOTER_BRAND_OPTION ) ) {
		add_option( WELCOMA_WIDGET_FOOTER_BRAND_OPTION, $texts );
	} elseif ( get_option( WELCOMA_WIDGET_FOOTER_BRAND_OPTION ) !== $texts ) {
		update_option( WELCOMA_WIDGET_FOOTER_BRAND_OPTION, $texts );
	}
}
add_action( 'plugins_loaded', 'welcoma_widget_sync_footer_brand' );

/**
 * Runs on activation: seed default settings.
 */
function welcoma_widget_activate() {

	welcoma_widget_sync_footer_brand();

	$is_first_install = false;

	if ( false === get_option( WELCOMA_WIDGET_OPTION ) ) {

		$settings = Welcoma_Settings::default_settings();

		// Detect WordPress site language and apply to widget default.
		$settings['default_language'] = welcoma_widget_locale_to_lang( determine_locale() );

		add_option( WELCOMA_WIDGET_OPTION, $settings );

		$is_first_install = true;
	}

	if ( false === get_option( WELCOMA_WIDGET_STATEMENT_OPTION ) ) {
		add_option(
			WELCOMA_WIDGET_STATEMENT_OPTION,
			array(
				'company_name' => '',
				'email'        => '',
				'website_url'  => '',
				'content'      => '',
			)
		);
	}

	if ( $is_first_install ) {
		welcoma_widget_seed_default_translations();
	}
}

/**
 * Seeds the translation cache from the bundled default-translations.php file
 * so the widget has translations available immediately after first activation,
 * without needing to run the translation chain.
 */
function welcoma_widget_seed_default_translations() {

	$file = WELCOMA_WIDGET_PATH . 'includes/default-translations.php';
	if ( ! file_exists( $file ) ) {
		return;
	}

	$translations = require $file;

	$modules    = welcoma_widget_get_modules();
	$en_strings = array(
		'accessibility_title' => 'Accessibility',
	);

	foreach ( $modules as $module ) {
		$safe_id                                     = str_replace( '-', '_', $module['id'] );
		$en_strings[ 'mod__' . $safe_id . '__name' ] = $module['name'];
		$en_strings[ 'mod__' . $safe_id . '__desc' ] = $module['desc'] ?? '';
	}

	$static_strings = Welcoma_Translator::static_ui_strings();

	$en_strings = array_merge( $en_strings, $static_strings );

	$cache = array();
	foreach ( $translations as $key => $langs ) {
		foreach ( $langs as $lang => $value ) {
			$cache[ $key ][ $lang ] = $value;
		}
	}

	update_option( Welcoma_Translator::CACHE_OPTION, $cache, false );

	// Seed the snapshot as English-authored so future edits in other
	// locales are correctly detected as "locale changed" on first save.
	$welcoma_seed_lang   = Welcoma_Translator::current_source_lang();
	$welcoma_locale_strs = array();
	foreach ( array_keys( $en_strings ) as $welcoma_seed_key ) {
		if ( ! empty( $cache[ $welcoma_seed_key ][ $welcoma_seed_lang ] ) ) {
			$welcoma_locale_strs[ $welcoma_seed_key ] = $cache[ $welcoma_seed_key ][ $welcoma_seed_lang ];
		}
	}

	update_option(
		Welcoma_Translator::SNAPSHOT_OPTION,
		array(
			'locale'  => 'en',
			'values'  => $en_strings,
			'locales' => array_filter(
				array(
					'en'               => $en_strings,
					$welcoma_seed_lang => $welcoma_locale_strs,
				)
			),
		),
		false
	);

	// Bundled translations are local data; Core schedules no translation jobs.
}


register_activation_hook( __FILE__, 'welcoma_widget_activate' );

/**
 * Runs on deactivation. (Settings are kept; full cleanup happens in uninstall.php.)
 */
function welcoma_widget_deactivate() {
	// No background analytics or automatic translation jobs are scheduled by Core.
}
register_deactivation_hook( __FILE__, 'welcoma_widget_deactivate' );

/**
 * Boot the plugin once all plugins are loaded.
 */
function welcoma_widget() {
	return Welcoma_Widget::instance();
}
add_action( 'plugins_loaded', 'welcoma_widget' );