/**
 * Theme mod keys that should be available to multilingual string plugins.
 *
 * @return string[]
 */
function kedani_safari_translatable_theme_mod_keys() {
	return array(
		'topbar_text',
		'address',
		'response_expectation',
		'primary_cta_label',
		'primary_cta_link',
		'secondary_cta_label',
		'secondary_cta_link',
		'hero_eyebrow',
		'hero_title',
		'hero_text',
		'hero_metric_one',
		'hero_metric_two',
		'hero_metric_three',
		'company_blurb',
		'footer_newsletter_title',
		'footer_newsletter_text',
	);
}

/**
 * Build a stable multilingual string identifier for a theme mod.
 *
 * @param string $key Theme mod key.
 * @return string
 */
function kedani_safari_theme_mod_string_name( $key ) {
	return 'theme_mod_' . sanitize_key( (string) $key );
}

/**
 * Translate theme mod values via active multilingual plugins when available.
 *
 * @param string $key Theme mod key.
 * @param string $value Raw theme mod value.
 * @return string
 */
function kedani_safari_translate_theme_mod_value( $key, $value ) {
	$value = (string) $value;

	if ( '' === trim( $value ) || ! in_array( $key, kedani_safari_translatable_theme_mod_keys(), true ) ) {
		return $value;
	}

	if ( defined( 'ICL_SITEPRESS_VERSION' ) || has_filter( 'wpml_translate_single_string' ) ) {
		$translated = apply_filters( 'wpml_translate_single_string', $value, 'kedani-safari', kedani_safari_theme_mod_string_name( $key ) );

		if ( is_string( $translated ) && '' !== trim( $translated ) ) {
			$value = $translated;
		}
	} elseif ( function_exists( 'pll__' ) ) {
		$translated = pll__( $value );

		if ( is_string( $translated ) && '' !== trim( $translated ) ) {
			$value = $translated;
		}
	}

	return $value;
}

/**
 * Register translatable theme settings with supported multilingual plugins.
 *
 * @return void
 */
function kedani_safari_register_multilingual_strings() {
	$defaults = kedani_safari_default_settings();

	foreach ( kedani_safari_translatable_theme_mod_keys() as $key ) {
		$value = (string) get_theme_mod( $key, $defaults[ $key ] ?? '' );

		if ( '' === trim( $value ) ) {
			continue;
		}

		if ( function_exists( 'pll_register_string' ) ) {
			pll_register_string(
				kedani_safari_theme_mod_string_name( $key ),
				$value,
				'Kedani Safari',
				false !== strpos( $value, "\n" )
			);
		}

		if ( defined( 'ICL_SITEPRESS_VERSION' ) || has_action( 'wpml_register_single_string' ) ) {
			do_action( 'wpml_register_single_string', 'kedani-safari', kedani_safari_theme_mod_string_name( $key ), $value );
		}
	}
}

/**
 * Resolve the current language code from active multilingual plugins.
 *
 * @return string
 */
function kedani_safari_current_language_code() {
	$language = '';

	if ( defined( 'ICL_SITEPRESS_VERSION' ) || has_filter( 'wpml_current_language' ) ) {
		$language = (string) apply_filters( 'wpml_current_language', null );
	}

	if ( ! $language && function_exists( 'pll_current_language' ) ) {
		$language = (string) pll_current_language( 'slug' );
	}

	if ( ! $language ) {
		$locale   = strtolower( (string) get_locale() );
		$language = substr( $locale, 0, 2 );
	}

	return sanitize_key( $language ? $language : 'en' );
}

/**
 * Map language codes to readable labels.
 *
 * @param string $code Language code.
 * @return string
 */
function kedani_safari_language_label_from_code( $code ) {
	$labels = array(
		'en' => __( 'English', 'kedani-safari' ),
		'sw' => __( 'Swahili', 'kedani-safari' ),
		'de' => __( 'German', 'kedani-safari' ),
		'it' => __( 'Italian', 'kedani-safari' ),
		'zh' => __( 'Chinese', 'kedani-safari' ),
		'fr' => __( 'French', 'kedani-safari' ),
	);
	$code   = sanitize_key( strtolower( (string) $code ) );

	return $labels[ $code ] ?? strtoupper( $code );
}

/**
 * Build language switcher items for the header utility menus.
 *
 * @return array<int, array<string, mixed>>
 */
function kedani_safari_language_switcher_items() {
	$current_language = kedani_safari_current_language_code();
	$items            = array();
	$filtered_items   = apply_filters( 'kedani_safari_language_switcher_items', array(), $current_language );

	if ( ! empty( $filtered_items ) && is_array( $filtered_items ) ) {
		$items = $filtered_items;
	} elseif ( function_exists( 'pll_the_languages' ) ) {
		$languages = pll_the_languages(
			array(
				'raw'                 => 1,
				'hide_if_empty'       => 0,
				'hide_if_no_translation' => 0,
			)
		);

		if ( is_array( $languages ) ) {
			foreach ( $languages as $language ) {
				if ( ! is_array( $language ) ) {
					continue;
				}

				$items[] = array(
					'code'    => (string) ( $language['slug'] ?? '' ),
					'label'   => (string) ( $language['name'] ?? '' ),
					'url'     => (string) ( $language['url'] ?? '' ),
					'current' => ! empty( $language['current_lang'] ),
				);
			}
		}
	} elseif ( defined( 'ICL_SITEPRESS_VERSION' ) || has_filter( 'wpml_active_languages' ) ) {
		$languages = apply_filters(
			'wpml_active_languages',
			null,
			array(
				'skip_missing' => 0,
			)
		);

		if ( is_array( $languages ) ) {
			foreach ( $languages as $language ) {
				if ( ! is_array( $language ) ) {
					continue;
				}

				$items[] = array(
					'code'    => (string) ( $language['language_code'] ?? $language['code'] ?? '' ),
					'label'   => (string) ( $language['native_name'] ?? $language['translated_name'] ?? $language['display_name'] ?? '' ),
					'url'     => (string) ( $language['url'] ?? '' ),
					'current' => ! empty( $language['active'] ),
				);
			}
		}
	}

	if ( empty( $items ) ) {
		$fallback_languages = array( 'en', 'sw', 'de', 'it', 'zh' );

		foreach ( $fallback_languages as $language_code ) {
			$items[] = array(
				'code'    => $language_code,
				'label'   => kedani_safari_language_label_from_code( $language_code ),
				'url'     => '',
				'current' => $language_code === $current_language,
			);
		}
	}

	$normalized = array();

	foreach ( $items as $item ) {
		if ( ! is_array( $item ) ) {
			continue;
		}

		$code    = sanitize_key( (string) ( $item['code'] ?? '' ) );
		$label   = trim( (string) ( $item['label'] ?? '' ) );
		$url     = trim( (string) ( $item['url'] ?? '' ) );
		$current = ! empty( $item['current'] ) || ( $code && $code === $current_language );

		if ( '' === $label ) {
			$label = kedani_safari_language_label_from_code( $code );
		}

		if ( '' === $label ) {
			continue;
		}

		$normalized[] = array(
			'code'    => $code,
			'label'   => $label,
			'url'     => $url,
			'current' => $current,
		);
	}

	return $normalized;
}

/**
 * Resolve the current language label.
 *
 * @return string
 */
function kedani_safari_current_language_label() {
	foreach ( kedani_safari_language_switcher_items() as $item ) {
		if ( ! empty( $item['current'] ) && ! empty( $item['label'] ) ) {
			return (string) $item['label'];
		}
	}

	return kedani_safari_language_label_from_code( kedani_safari_current_language_code() );
}

/**
 * Resolve the current storefront currency code.
 *
 * @return string
 */
function kedani_safari_current_currency_code() {
	$currency = function_exists( 'get_woocommerce_currency' ) ? (string) get_woocommerce_currency() : 'USD';

	if ( class_exists( 'WCML\\MultiCurrency\\Settings' ) || has_filter( 'wcml_get_client_currency' ) ) {
		$currency = (string) apply_filters( 'wcml_get_client_currency', $currency );
	}

	return strtoupper( trim( $currency ? $currency : 'USD' ) );
}

/**
 * Build currency switcher items for the header utility menus.
 *
 * @return array<int, array<string, mixed>>
 */
function kedani_safari_currency_switcher_items() {
	$current_currency = kedani_safari_current_currency_code();
	$items            = array();
	$filtered_items   = apply_filters( 'kedani_safari_currency_switcher_items', array(), $current_currency );
	// Check for WCML MultiCurrency class with the required static methods.
	$has_wcml_class  = class_exists( 'WCML\\MultiCurrency\\Settings' )
		&& method_exists( 'WCML\\MultiCurrency\\Settings', 'getOrderedCurrencyCodes' )
		&& function_exists( 'get_woocommerce_currencies' );
	$has_wcml_source = $has_wcml_class;

	if ( ! empty( $filtered_items ) && is_array( $filtered_items ) ) {
		$items = $filtered_items;
	} elseif ( $has_wcml_source ) {
		try {
			$currency_codes = \WCML\MultiCurrency\Settings::getOrderedCurrencyCodes();
			$currencies     = get_woocommerce_currencies();

			if ( method_exists( 'WCML\\MultiCurrency\\Settings', 'isModeByLanguage' )
				&& \WCML\MultiCurrency\Settings::isModeByLanguage() ) {
				$current_language = kedani_safari_current_language_code();
				$filtered_codes   = array_values(
					array_filter(
						$currency_codes,
						static function ( $code ) use ( $current_language ) {
							return method_exists( 'WCML\\MultiCurrency\\Settings', 'isValidCurrencyForLang' )
								&& \WCML\MultiCurrency\Settings::isValidCurrencyForLang( $code, $current_language );
						}
					)
				);
				if ( ! empty( $filtered_codes ) ) {
					$currency_codes = $filtered_codes;
				}
			} elseif ( method_exists( 'WCML\\MultiCurrency\\Settings', 'isModeByLocation' )
				&& \WCML\MultiCurrency\Settings::isModeByLocation()
				&& class_exists( 'WCML\\MultiCurrency\\Geolocation' )
				&& method_exists( 'WCML\\MultiCurrency\\Geolocation', 'getUserCountry' ) ) {
				$user_country   = \WCML\MultiCurrency\Geolocation::getUserCountry();
				$filtered_codes = array_values(
					array_filter(
						$currency_codes,
						static function ( $code ) use ( $user_country ) {
							return method_exists( 'WCML\\MultiCurrency\\Settings', 'isValidCurrencyByCountry' )
								&& \WCML\MultiCurrency\Settings::isValidCurrencyByCountry( $code, $user_country );
						}
					)
				);
				if ( ! empty( $filtered_codes ) ) {
					$currency_codes = $filtered_codes;
				}
			}

			foreach ( $currency_codes as $code ) {
				$code    = strtoupper( trim( (string) $code ) );
				$name    = isset( $currencies[ $code ] ) ? (string) $currencies[ $code ] : $code;
				$items[] = array(
					'code'     => $code,
					'label'    => trim( $code . ' – ' . $name ),
					'current'  => $code === $current_currency,
					'url'      => '',
					'switcher' => 'wcml',
				);
			}
		} catch ( \Throwable $e ) {
			// WCML class exists but threw an exception — fall through to the fallback below.
			$has_wcml_source = false;
		}
	}

	if ( empty( $items ) ) {
		$fallback_currencies = $has_wcml_source
			? array(
				$current_currency => $current_currency,
			)
			: array(
				'USD' => __( 'USD US Dollar', 'kedani-safari' ),
				'EUR' => __( 'EUR Euro', 'kedani-safari' ),
				'TZS' => __( 'TZS Tanzanian Shilling', 'kedani-safari' ),
			);

		foreach ( $fallback_currencies as $code => $label ) {
			$items[] = array(
				'code'     => $code,
				'label'    => $label,
				'current'  => $code === $current_currency,
				'url'      => '',
				'switcher' => '',
			);
		}
	}

	$normalized = array();

	foreach ( $items as $item ) {
		if ( ! is_array( $item ) ) {
			continue;
		}

		$code     = strtoupper( trim( (string) ( $item['code'] ?? '' ) ) );
		$label    = trim( (string) ( $item['label'] ?? '' ) );
		$url      = trim( (string) ( $item['url'] ?? '' ) );
		$current  = ! empty( $item['current'] ) || ( $code && $code === $current_currency );
		$switcher = sanitize_key( (string) ( $item['switcher'] ?? '' ) );

		if ( '' === $label ) {
			$label = $code;
		}

		if ( '' === $label ) {
			continue;
		}

		$normalized[] = array(
			'code'     => $code,
			'label'    => $label,
			'url'      => $url,
			'current'  => $current,
			'switcher' => $switcher,
		);
	}

	return $normalized;
}

/**
 * Resolve the current storefront currency label.
 *
 * @return string
 */
function kedani_safari_current_currency_label() {
	foreach ( kedani_safari_currency_switcher_items() as $item ) {
		if ( ! empty( $item['current'] ) ) {
			return ! empty( $item['code'] ) ? (string) $item['code'] : (string) $item['label'];
		}
	}

	return kedani_safari_current_currency_code();
}

/**
 * Build the compact combined utility label shown in header pills.
 *
 * @return string
 */
function kedani_safari_language_currency_label() {
	$language_label = kedani_safari_current_language_label();
	$currency_label = kedani_safari_current_currency_label();

	if ( empty( $language_label ) || empty( $currency_label ) ) {
		return $language_label ? $language_label : $currency_label;
	}

	return sprintf(
		/* translators: 1: current language label, 2: current currency code. */
		__( '%1$s | %2$s', 'kedani-safari' ),
		$language_label,
		$currency_label
	);
}

/**
 * Resolve a translated equivalent for a post or page ID when available.
 *
 * @param int $post_id Original post ID.
 * @return int
 */
// Hook multilingual string registration so WPML/Polylang pick up theme strings.
add_action( 'init', 'kedani_safari_register_multilingual_strings', 25 );

/**
 * Translate a post or page ID to its equivalent in the current language.
 *
 * @param int $post_id Original post ID.
 * @return int
 */
function kedani_safari_translate_post_id( $post_id ) {
	$post_id = (int) $post_id;

	if ( $post_id <= 0 ) {
		return 0;
	}

	if ( defined( 'ICL_SITEPRESS_VERSION' ) || has_filter( 'wpml_object_id' ) ) {
		$translated_id = (int) apply_filters( 'wpml_object_id', $post_id, get_post_type( $post_id ), true );

		if ( $translated_id > 0 ) {
			return $translated_id;
		}
	}

	if ( function_exists( 'pll_get_post' ) ) {
		$translated_id = (int) pll_get_post( $post_id, kedani_safari_current_language_code() );

		if ( $translated_id > 0 ) {
			return $translated_id;
		}
	}

	return $post_id;
}