<?php
/**
 * Customer helper
 *
 * @author    Pronamic <info@pronamic.eu>
 * @copyright 2005-2026 Pronamic
 * @license   GPL-3.0-or-later
 * @package   Pronamic\WordPress\Pay
 */

namespace Pronamic\WordPress\Pay;

use Pronamic\WordPress\DateTime\DateTime;
use Pronamic\WordPress\Pay\Core\Util as Core_Util;

/**
 * Customer helper
 *
 * @version 2.4.0
 * @since   2.1.0
 */
class CustomerHelper {
	/**
	 * Complement customer.
	 *
	 * @param Customer $customer Customer to complement.
	 * @return void
	 */
	public static function complement_customer( Customer $customer ) {
		// Name.
		if ( null === $customer->get_name() && is_user_logged_in() ) {
			$user = wp_get_current_user();

			$data = [
				'first_name' => $user->user_firstname,
				'last_name'  => $user->user_lastname,
			];

			$data = array_map( trim( ... ), $data );
			$data = array_filter( $data );

			if ( ! empty( $data ) ) {
				$name = new ContactName();

				$customer->set_name( $name );
			}
		}

		// User ID.
		if ( null === $customer->get_user_id() && is_user_logged_in() ) {
			$customer->set_user_id( \get_current_user_id() );
		}

		// Name.
		$name = $customer->get_name();

		if ( null !== $name ) {
			ContactNameHelper::complement_name( $name );
		}

		// Locale.
		if ( null === $customer->get_locale() ) {
			$locales = [];

			// User locale.
			if ( is_user_logged_in() ) {
				$user = wp_get_current_user();

				$locales[] = $user->locale;
			}

			$http_locale = self::locale_accept_from_http();

			if ( '' !== $http_locale ) {
				$locales[] = $http_locale;
			}

			// Site locale.
			$locales[] = get_locale();

			// Find first valid locale.
			$locales = array_filter( $locales );

			$locale = reset( $locales );

			if ( ! empty( $locale ) ) {
				$customer->set_locale( $locale );
			}
		}

		// Language.
		$locale = $customer->get_locale();

		if ( null === $customer->get_language() && null !== $locale ) {
			$language = substr( $locale, 0, 2 );

			$customer->set_language( $language );
		}

		/**
		 * User Agent.
		 *
		 * @link https://github.com/WordPress/WordPress/blob/4.9.4/wp-includes/comment.php#L1962-L1965
		 */
		if ( null === $customer->get_user_agent() && isset( $_SERVER['HTTP_USER_AGENT'] ) ) {
			$user_agent = \sanitize_text_field( \wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) );

			$customer->set_user_agent( $user_agent );
		}

		// User IP.
		if ( null === $customer->get_ip_address() ) {
			// IP (@link https://github.com/WordPress/WordPress/blob/4.9.4/wp-includes/comment.php#L1957-L1960).
			$ip_address = Core_Util::get_remote_address();

			if ( ! empty( $ip_address ) ) {
				$customer->set_ip_address( $ip_address );
			}
		}

		// Gender.
		// phpcs:ignore WordPress.Security.NonceVerification.Missing
		$gender = \array_key_exists( 'pronamic_pay_gender', $_POST ) ? \sanitize_text_field( \wp_unslash( $_POST['pronamic_pay_gender'] ) ) : null;

		if ( null === $customer->get_gender() && null !== $gender && Gender::is_valid( $gender ) ) {
			$customer->set_gender( $gender );
		}

		// Birth date.
		// phpcs:ignore WordPress.Security.NonceVerification.Missing
		$birth_date_string = \array_key_exists( 'pronamic_pay_birth_date', $_POST ) ? \sanitize_text_field( \wp_unslash( $_POST['pronamic_pay_birth_date'] ) ) : null;

		if ( null === $customer->get_birth_date() && ! empty( $birth_date_string ) ) {
			$birth_date = DateTime::create_from_format( 'Y-m-d', $birth_date_string );

			if ( false !== $birth_date ) {
				$customer->set_birth_date( $birth_date );
			}
		}
	}

	/**
	 * Locale accept from HTTP.
	 *
	 * @return string
	 */
	private static function locale_accept_from_http() {
		if ( ! \function_exists( '\locale_accept_from_http' ) ) {
			return '';
		}

		if ( ! \array_key_exists( 'HTTP_ACCEPT_LANGUAGE', $_SERVER ) ) {
			return '';
		}

		$accept_language = \sanitize_text_field( \wp_unslash( $_SERVER['HTTP_ACCEPT_LANGUAGE'] ) );

		if ( '' === $accept_language ) {
			return '';
		}

		/**
		 * Please note that `locale_accept_from_http` can also return `false`,
		 * this is not documented on PHP.net.
		 *
		 * @link https://www.php.net/manual/en/locale.acceptfromhttp.php
		 * @link https://github.com/php/php-src/blob/php-7.3.5/ext/intl/locale/locale_methods.c#L1578-L1631
		 */
		$http_locale = \locale_accept_from_http( $accept_language );

		if ( false === $http_locale ) {
			return '';
		}

		return $http_locale;
	}

	/**
	 * Create a customer from an array.
	 *
	 * @param array $data Data.
	 * @return Customer|null
	 */
	public static function from_array( $data ) {
		$data = \array_filter(
			$data,
			fn( $value ) => ( null !== $value ) && ( '' !== $value )
		);

		if ( empty( $data ) ) {
			return null;
		}

		$customer = new Customer();

		if ( \array_key_exists( 'name', $data ) ) {
			$name = $data['name'];

			if ( $name instanceof ContactName ) {
				$customer->set_name( $name );
			}
		}

		if ( \array_key_exists( 'email', $data ) ) {
			$customer->set_email( $data['email'] );
		}

		if ( \array_key_exists( 'phone', $data ) ) {
			$customer->set_phone( $data['phone'] );
		}

		if ( \array_key_exists( 'user_id', $data ) ) {
			$customer->set_user_id( \intval( $data['user_id'] ) );
		}

		return $customer;
	}
}
