<?php
/** Validated, site-local configuration. @package EscuderMaintenance */
namespace Escuder\Maintenance;

defined( 'ABSPATH' ) || exit;

final class Settings {
	const OPTION = 'escuder_maintenance_options';

	public static function defaults() {
		return array(
			'enabled' => 0,
			'allowed_ips' => array(),
			'title' => '',
			'message' => '',
			'accent' => '#2563eb',
			'background' => '#f1f5f9',
			'logo_id' => 0,
		);
	}

	public static function all() {
		$saved = get_option( self::OPTION, array() );
		return array_merge( self::defaults(), is_array( $saved ) ? $saved : array() );
	}

	public static function enabled() {
		return ! ( defined( 'ESCUDER_MAINTENANCE_BYPASS' ) && true === ESCUDER_MAINTENANCE_BYPASS ) && ! empty( self::all()['enabled'] );
	}

	public static function sanitize( $input ) {
		if ( ! is_array( $input ) ) {
			return new \WP_Error( 'invalid_settings', __( 'Invalid settings. No changes were saved.', 'escuder-maintenance' ) );
		}
		$ips = Ip_Address::parse( isset( $input['allowed_ips'] ) ? $input['allowed_ips'] : '' );
		if ( is_wp_error( $ips ) ) {
			return $ips;
		}
		foreach ( array( 'title', 'message', 'accent', 'background', 'logo_id', 'enabled' ) as $key ) {
			if ( isset( $input[ $key ] ) && ! is_scalar( $input[ $key ] ) ) {
				return new \WP_Error( 'invalid_settings', __( 'Invalid settings. No changes were saved.', 'escuder-maintenance' ) );
			}
		}
		$logo_id = isset( $input['logo_id'] ) ? absint( $input['logo_id'] ) : 0;
		if ( $logo_id && ! wp_attachment_is_image( $logo_id ) ) {
			return new \WP_Error( 'invalid_logo', __( 'Choose an image from the Media Library for the logo.', 'escuder-maintenance' ) );
		}
		$defaults = self::defaults();
		$result   = array(
			'enabled' => isset( $input['enabled'] ) && '1' === (string) $input['enabled'] ? 1 : 0,
			'allowed_ips' => $ips,
			'title' => isset( $input['title'] ) ? sanitize_text_field( $input['title'] ) : '',
			'message' => isset( $input['message'] ) ? sanitize_textarea_field( $input['message'] ) : '',
			'logo_id' => $logo_id,
		);
		if ( strlen( $result['title'] ) > 600 || strlen( $result['message'] ) > 12000 ) {
			return new \WP_Error( 'invalid_length', __( 'The title or message is too long. No changes were saved.', 'escuder-maintenance' ) );
		}
		foreach ( array( 'accent', 'background' ) as $key ) {
			$color = isset( $input[ $key ] ) ? sanitize_hex_color( $input[ $key ] ) : $defaults[ $key ];
			if ( ! $color ) {
				return new \WP_Error( 'invalid_color', __( 'Choose a valid hexadecimal color.', 'escuder-maintenance' ) );
			}
			$result[ $key ] = $color;
		}
		return $result;
	}

	public static function title( $options ) {
		return '' !== $options['title'] ? $options['title'] : __( 'Site under construction', 'escuder-maintenance' );
	}

	public static function message( $options ) {
		return '' !== $options['message'] ? $options['message'] : __( 'We are preparing something new. Please come back soon.', 'escuder-maintenance' );
	}
}