<?php

namespace rbRedirection;

defined( 'ABSPATH' ) || exit;

/**
 * The plugin's settings, one option row.
 */
class Settings {

	public const OPTION = 'rb_redirection_settings';

	public static function defaults(): array {
		return array(
			'log404'          => true,  // keep a log of addresses that end in "not found"
			'log404Days'      => 30,    // forget 404s not seen for this many days
			'slugWatch'       => true,  // a post's address changes: redirect the old one
			'keepQuery'       => true,  // carry the query string to the target
			'countHits'       => true,  // count how often each redirect is used
			'fallback404'     => 'none', // none | home | url
			'fallback404Url'  => '',
			'fallback404Code' => 302,
		);
	}

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

	public static function get( string $key ) {
		$all = self::all();
		return array_key_exists( $key, $all ) ? $all[ $key ] : null;
	}

	/** @return array the values as stored */
	public static function save( array $in ): array {
		$out = self::all();
		foreach ( self::defaults() as $key => $default ) {
			if ( ! array_key_exists( $key, $in ) ) {
				continue;
			}
			$value = $in[ $key ];
			switch ( $key ) {
				case 'log404Days':
					$out[ $key ] = max( 1, min( 365, (int) $value ) );
					break;
				case 'fallback404':
					$out[ $key ] = in_array( $value, array( 'none', 'home', 'url' ), true ) ? $value : 'none';
					break;
				case 'fallback404Url':
					$value       = trim( (string) $value );
					$out[ $key ] = $value === '' || preg_match( '#^(/|https?://)#i', $value ) ? esc_url_raw( $value ) : '';
					break;
				case 'fallback404Code':
					$out[ $key ] = in_array( (int) $value, array( 301, 302, 307 ), true ) ? (int) $value : 302;
					break;
				default:
					$out[ $key ] = rest_sanitize_boolean( $value );
			}
		}
		update_option( self::OPTION, $out );
		return $out;
	}
}