<?php
/**
 * Settings tab: the owner's phone number, the e-mail about replies and the allowed recipient countries.
 *
 * @package Smsportal
 */

namespace Smsportal\Admin;

use Smsportal\Limits;
use Smsportal\Phone;
use Smsportal\Replies;

defined( 'ABSPATH' ) || exit;

/**
 * Renders and saves the plugin settings.
 */
class SettingsPage {

	const SAVE_ACTION = 'smsportal_save_settings';

	/**
	 * Option: the owner's number in E.164 (test SMS go there).
	 */
	const OWNER_PHONE_OPTION = 'smsportal_owner_phone';

	/**
	 * Register hooks.
	 *
	 * @return void
	 */
	public static function register(): void {
		add_action( 'admin_post_' . self::SAVE_ACTION, array( self::class, 'handle_save' ) );
	}

	/**
	 * The owner's number, or '' when not set.
	 *
	 * @return string
	 */
	public static function owner_phone(): string {
		return (string) get_option( self::OWNER_PHONE_OPTION, '' );
	}

	/**
	 * '1' when the owner gets an e-mail about each reply (default), '0' otherwise.
	 *
	 * @return string
	 */
	public static function reply_email(): string {
		return '0' === (string) get_option( Replies::EMAIL_OPTION, '1' ) ? '0' : '1';
	}

	/**
	 * Render the tab.
	 *
	 * @return void
	 */
	public static function render(): void {
		$smsportal_owner_phone = self::owner_phone();
		$smsportal_reply_email = self::reply_email();
		$smsportal_countries   = (string) get_option( Limits::COUNTRIES_OPTION, '' );
		$smsportal_default     = Phone::default_country_code();
		$smsportal_limits      = Limits::rate_limits();
		include SMSPORTAL_DIR . 'includes/Admin/views/settings.php';
	}

	/**
	 * Form handler (admin-post).
	 *
	 * @return void
	 */
	public static function handle_save(): void {
		if ( ! current_user_can( Menu::CAPABILITY ) ) {
			Guard::deny();
		}
		check_admin_referer( self::SAVE_ACTION );
		self::process_save( wp_unslash( $_POST ) );
		Guard::redirect( Menu::tab_url( 'settings' ) );
	}

	/**
	 * Save the posted settings.
	 *
	 * @param array<string,mixed> $post Unslashed form fields.
	 * @return void
	 */
	public static function process_save( array $post ): void {
		$raw = isset( $post['owner_phone'] ) && is_string( $post['owner_phone'] ) ? trim( sanitize_text_field( $post['owner_phone'] ) ) : '';
		if ( '' !== $raw && null === Phone::normalize( $raw, Phone::default_country_code() ) ) {
			Notice::add( 'error', __( 'Your phone number is not valid. Nothing was saved.', '85pl-android-sms-api' ) );
			return;
		}
		$countries = Limits::clean_setting( isset( $post['allowed_countries'] ) && is_string( $post['allowed_countries'] ) ? sanitize_text_field( $post['allowed_countries'] ) : '' );
		if ( array() !== $countries['invalid'] ) {
			/* translators: %s: entries that are not countries, e.g. "XX". */
			Notice::add( 'error', sprintf( __( 'Allowed recipient countries: %s is not a country code. Use two-letter codes (PL, DE) or calling codes (48, 386). Nothing was saved.', '85pl-android-sms-api' ), implode( ', ', $countries['invalid'] ) ) );
			return;
		}
		update_option( Limits::COUNTRIES_OPTION, $countries['value'], false );
		update_option( self::OWNER_PHONE_OPTION, '' === $raw ? '' : Phone::normalize( $raw, Phone::default_country_code() ), false );
		update_option( Replies::EMAIL_OPTION, empty( $post['reply_email'] ) ? '0' : '1', false );
		Notice::add( 'success', __( 'Settings saved.', '85pl-android-sms-api' ) );
	}
}