<?php
/**
 * Pflege: Reparatur der Spiegelfelder, Website-Zustand, Infobereich, Polylang.
 *
 * @package ThreeRB
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Reparatur und Diagnose der ganzen Seite.
 */
final class ThreeRB_Care {

	/**
	 * Haken setzen.
	 */
	public static function init() {
		add_action( 'rest_api_init', array( __CLASS__, 'routes' ) );
		add_filter( 'site_status_tests', array( __CLASS__, 'tests' ) );
		add_filter( 'debug_information', array( __CLASS__, 'info' ) );
		add_filter( 'pll_copy_post_metas', array( __CLASS__, 'polylang' ), 10, 2 );
	}

	/**
	 * REST: threerb/v1/repair.
	 */
	public static function routes() {
		register_rest_route(
			'threerb/v1',
			'/repair',
			array(
				'methods'             => 'POST',
				'callback'            => array( __CLASS__, 'rest_repair' ),
				'permission_callback' => function () {
					return current_user_can( 'manage_options' );
				},
				'args'                => array(
					'offset' => array(
						'type'    => 'integer',
						'minimum' => 0,
						'default' => 0,
					),
					'limit'  => array(
						'type'    => 'integer',
						'minimum' => 1,
						'maximum' => 500,
						'default' => 200,
					),
				),
			)
		);
	}

	/**
	 * REST-Antwort der Reparatur.
	 *
	 * @param WP_REST_Request $request Anfrage.
	 * @return WP_REST_Response
	 */
	public static function rest_repair( $request ) {
		return rest_ensure_response( self::repair( (int) $request['offset'], (int) $request['limit'] ) );
	}

	/**
	 * Rechnet die Spiegelfelder eines Stapels neu, entfernt Spiegel ohne Box und meldet unlesbare Boxen.
	 * Box-Daten selbst werden nie gelöscht.
	 *
	 * @param int $offset Beginn.
	 * @param int $limit  Anzahl.
	 * @return array{checked:int, fixed:int, broken:array<int,int>, next:int|null}
	 */
	public static function repair( $offset, $limit ) {
		$ids    = self::posts( $offset, $limit + 1 );
		$weiter = count( $ids ) > $limit;
		$ids    = array_slice( $ids, 0, $limit );
		$fixed  = 0;
		$kaputt = array();
		foreach ( $ids as $id ) {
			$roh = get_post_meta( $id, ThreeRB_Box::META_BOX, true );
			if ( is_string( $roh ) && '' !== $roh && ! is_array( json_decode( $roh, true ) ) ) {
				$kaputt[] = $id;
			}
			$vorher = self::mirror_state( $id );
			ThreeRB_Box::mirror( $id );
			if ( self::mirror_state( $id ) !== $vorher ) {
				++$fixed;
			}
		}
		return array(
			'checked' => count( $ids ),
			'fixed'   => $fixed,
			'broken'  => $kaputt,
			'next'    => $weiter ? $offset + $limit : null,
		);
	}

	/**
	 * Stimmen die Spiegel mit den Boxen überein? (höchstens 500 Beiträge, für den Website-Zustand)
	 *
	 * @return int Anzahl falscher Spiegel.
	 */
	public static function mirror_errors() {
		$falsch = 0;
		foreach ( self::posts( 0, 500 ) as $id ) {
			$box    = ThreeRB_Box::get( $id );
			$gesamt = $box ? ThreeRB_Score::total( $box ) : array( 'value' => null );
			$soll   = null === $gesamt['value'] ? array( '', '', '' ) : array( (string) (int) round( $gesamt['share'] * 1000 ), $box['scale'], $box['item']['type'] );
			if ( self::mirror_state( $id ) !== $soll ) {
				++$falsch;
			}
		}
		return $falsch;
	}

	/**
	 * Tests im Website-Zustand.
	 *
	 * @param array $tests Tests.
	 * @return array
	 */
	public static function tests( $tests ) {
		$tests['direct']['threerb_schema'] = array(
			'label' => __( 'Review markup is written once', '3task-review-box' ),
			'test'  => array( __CLASS__, 'test_schema' ),
		);
		$tests['direct']['threerb_mirror'] = array(
			'label' => __( 'Review scores for lists are up to date', '3task-review-box' ),
			'test'  => array( __CLASS__, 'test_mirror' ),
		);
		return $tests;
	}

	/**
	 * Test: fremde Plugins, die selbst Bewertungs-Markup schreiben.
	 *
	 * @return array
	 */
	public static function test_schema() {
		$fremd = ThreeRB_Diagnose::foreign( 0 );
		$r     = self::result( 'threerb_schema', 'good', __( 'No other rating plugin writes review markup', '3task-review-box' ), __( 'Only 3task Review Box adds review markup, so Google sees one review per page.', '3task-review-box' ) );
		if ( $fremd ) {
			$r['status'] = 'recommended';
			$r['label']  = __( 'Another rating plugin may write review markup too', '3task-review-box' );
			/* translators: %s: plugin names. */
			$r['description'] = '<p>' . esc_html( sprintf( __( 'Active: %s. Two reviews on one page can cost the review snippet. Deactivate the old plugin once its ratings are moved.', '3task-review-box' ), implode( ', ', $fremd ) ) ) . '</p>';
		}
		return $r;
	}

	/**
	 * Test: Spiegelfelder aktuell.
	 *
	 * @return array
	 */
	public static function test_mirror() {
		$falsch = self::mirror_errors();
		$r      = self::result( 'threerb_mirror', 'good', __( 'Review scores for lists are up to date', '3task-review-box' ), __( 'Top lists, the score column and sorting use the current scores.', '3task-review-box' ) );
		if ( $falsch > 0 ) {
			$r['status'] = 'recommended';
			$r['label']  = __( 'Some review scores for lists are out of date', '3task-review-box' );
			/* translators: %d: number of posts. */
			$r['description'] = '<p>' . esc_html( sprintf( _n( '%d post has an outdated score for lists.', '%d posts have an outdated score for lists.', $falsch, '3task-review-box' ), $falsch ) ) . '</p>';
			$r['actions']     = sprintf( '<p><a href="%1$s">%2$s</a></p>', esc_url( admin_url( 'admin.php?page=threerb&tab=overview' ) ), esc_html__( 'Repair now', '3task-review-box' ) );
		}
		return $r;
	}

	/**
	 * Infobereich im Website-Zustand.
	 *
	 * @param array $info Bereiche.
	 * @return array
	 */
	public static function info( $info ) {
		$s                        = ThreeRB_Settings::get();
		$info['3task-review-box'] = array(
			'label'  => '3task Review Box',
			'fields' => array(
				'version' => array(
					'label' => __( 'Version', '3task-review-box' ),
					'value' => THREERB_VERSION,
				),
				'boxes'   => array(
					'label' => __( 'Posts with a rating', '3task-review-box' ),
					'value' => count( self::posts( 0, 5000 ) ),
				),
				'scale'   => array(
					'label' => __( 'Default scale', '3task-review-box' ),
					'value' => $s['scale'],
				),
				'display' => array(
					'label' => __( 'Look and style', '3task-review-box' ),
					'value' => $s['display'] . ', ' . $s['style'],
				),
				'schema'  => array(
					'label' => __( 'Review markup', '3task-review-box' ),
					'value' => self::schema_mode(),
				),
				'foreign' => array(
					'label' => __( 'Other rating plugins', '3task-review-box' ),
					'value' => implode( ', ', ThreeRB_Diagnose::foreign( 0 ) ),
				),
			),
		);
		return $info;
	}

	/**
	 * Wer schreibt das Schema?
	 *
	 * @return string
	 */
	public static function schema_mode() {
		if ( defined( 'RANK_MATH_VERSION' ) ) {
			return __( 'inside the Rank Math graph', '3task-review-box' );
		}
		if ( defined( 'WPSEO_VERSION' ) ) {
			return __( 'inside the Yoast SEO graph', '3task-review-box' );
		}
		return __( 'own JSON-LD in the page head', '3task-review-box' );
	}

	/**
	 * Polylang: Box beim Anlegen einer Übersetzung kopieren, danach nie synchronisieren
	 * (die Übersetzung hat eigene Texte, die Spiegel rechnet jede Sprache selbst).
	 *
	 * @param array $metas Schlüssel.
	 * @param bool  $sync  Synchronisieren statt anlegen.
	 * @return array
	 */
	public static function polylang( $metas, $sync = false ) {
		$metas = is_array( $metas ) ? $metas : array();
		if ( $sync ) {
			return array_values( array_diff( $metas, array( ThreeRB_Box::META_BOX, ThreeRB_Box::META_QUICK, ThreeRB_Box::META_SCORE, ThreeRB_Box::META_SCALE, ThreeRB_Box::META_TYPE ) ) );
		}
		return array_values( array_unique( array_merge( $metas, array( ThreeRB_Box::META_BOX, ThreeRB_Box::META_QUICK ) ) ) );
	}

	/**
	 * Beiträge mit Box, Schnellbereich oder Spiegel.
	 *
	 * @param int $offset Beginn.
	 * @param int $limit  Anzahl.
	 * @return array<int, int>
	 */
	public static function posts( $offset, $limit ) {
		return array_map(
			'intval',
			get_posts(
				array(
					'post_type'              => 'any',
					'post_status'            => array( 'publish', 'future', 'draft', 'pending', 'private' ),
					'posts_per_page'         => max( 1, (int) $limit ),
					'offset'                 => max( 0, (int) $offset ),
					'orderby'                => 'ID',
					'order'                  => 'ASC',
					'fields'                 => 'ids',
					'no_found_rows'          => true,
					'update_post_term_cache' => false,
					'meta_query'             => array( // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query -- Wartung, nur im Admin.
						'relation' => 'OR',
						array( 'key' => ThreeRB_Box::META_BOX ),
						array( 'key' => ThreeRB_Box::META_QUICK ),
						array( 'key' => ThreeRB_Box::META_SCORE ),
					),
				)
			)
		);
	}

	/**
	 * Aktueller Stand der drei Spiegelfelder.
	 *
	 * @param int $id Beitrag.
	 * @return array<int, string>
	 */
	private static function mirror_state( $id ) {
		return array(
			(string) get_post_meta( $id, ThreeRB_Box::META_SCORE, true ),
			(string) get_post_meta( $id, ThreeRB_Box::META_SCALE, true ),
			(string) get_post_meta( $id, ThreeRB_Box::META_TYPE, true ),
		);
	}

	/**
	 * Grundgerüst eines Testergebnisses.
	 *
	 * @param string $test        Kennung.
	 * @param string $status      good, recommended, critical.
	 * @param string $label       Überschrift.
	 * @param string $description Erklärung.
	 * @return array
	 */
	private static function result( $test, $status, $label, $description ) {
		return array(
			'label'       => $label,
			'status'      => $status,
			'badge'       => array(
				'label' => __( 'Reviews', '3task-review-box' ),
				'color' => 'blue',
			),
			'description' => '<p>' . esc_html( $description ) . '</p>',
			'actions'     => '',
			'test'        => $test,
		);
	}
}