<?php

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

class Rabbitproof_Map {

	const HOOK = 'rabbitproof_map';

	const INBOUND = '/(webhook|incoming|notify|notification|ipn|callback|listener)/i';
	const OWN     = '#^/(wp/v2|wc/v[123]|wc/store|oembed|wp-site-health|batch)\b#';

	public static function register() {
		add_action( self::HOOK, array( __CLASS__, 'send' ) );
		add_action( 'init', array( __CLASS__, 'schedule' ) );
	}

	public static function schedule() {
		$site = Rabbitproof_Options::get( 'site' );
		if ( empty( $site['verified'] ) ) {
			return;
		}
		if ( ! wp_next_scheduled( self::HOOK ) ) {
			wp_schedule_event( time() + 300, 'daily', self::HOOK );
		}
	}

	public static function stop() {
		wp_clear_scheduled_hook( self::HOOK );
		self::goodbye();
	}

	public static function goodbye() {
		$site = Rabbitproof_Options::get( 'site' );
		if ( ! Rabbitproof_Options::valid_secret_key( Rabbitproof_Options::get( 'secret_key' ) ) || empty( $site['id'] ) ) {
			return;
		}
		Rabbitproof_Api::call( 'POST', '/v1/sites/' . rawurlencode( $site['id'] ) . '/goodbye', array(), 5 );
	}

	public static function send() {
		$site = Rabbitproof_Options::get( 'site' );
		if ( empty( $site['verified'] ) || empty( $site['id'] ) || Rabbitproof_Options::gone() ) {
			return false;
		}
		$answer = Rabbitproof_Api::call( 'POST', '/v1/sites/' . rawurlencode( $site['id'] ) . '/map', self::build(), 10 );
		return ! is_wp_error( $answer ) && 200 === $answer['_status'];
	}

	public static function build() {
		return array(
			'lists'  => self::lists(),
			'always' => self::inbound(),
		);
	}

	public static function lists() {
		global $wp_rewrite;
		$pretty = $wp_rewrite && $wp_rewrite->using_permalinks();
		if ( ! $pretty ) {
			return array( array( 'path' => '/', 'param' => 'paged', 'style' => 'query', 'pages' => self::pages( self::published( 'post' ), self::per_page() ) ) );
		}
		$base  = $wp_rewrite->pagination_base ? $wp_rewrite->pagination_base : 'page';
		$found = array();
		$add   = function ( $url, $count, $per ) use ( &$found, $base ) {
			$path  = self::own_path( $url );
			$pages = self::pages( $count, $per );
			if ( null === $path || $pages < 2 || isset( $found[ $path ] ) || count( $found ) >= 50 ) {
				return;
			}
			$found[ $path ] = array( 'path' => $path, 'param' => $base, 'style' => 'path', 'pages' => $pages );
		};
		$per = self::per_page();

		$posts_page = (int) get_option( 'page_for_posts' );
		$add( 'page' === get_option( 'show_on_front' ) && $posts_page ? get_permalink( $posts_page ) : home_url( '/' ), self::published( 'post' ), $per );

		foreach ( get_post_types( array( 'public' => true, 'has_archive' => true ), 'names' ) as $type ) {
			$add( get_post_type_archive_link( $type ), self::published( $type ), 'product' === $type ? self::shop_per_page() : $per );
		}

		foreach ( array( 'category' => $per, 'product_cat' => self::shop_per_page() ) as $tax => $tax_per ) {
			if ( ! taxonomy_exists( $tax ) ) {
				continue;
			}
			$terms = get_terms( array( 'taxonomy' => $tax, 'hide_empty' => true, 'number' => 25, 'orderby' => 'count', 'order' => 'DESC' ) );
			foreach ( is_array( $terms ) ? $terms : array() as $term ) {
				$link = get_term_link( $term );
				if ( ! is_wp_error( $link ) ) {
					$add( $link, (int) $term->count, $tax_per );
				}
			}
		}
		return array_values( $found );
	}

	public static function inbound() {
		if ( ! function_exists( 'rest_get_server' ) ) {
			return array();
		}
		$prefix = '/' . trim( rest_get_url_prefix(), '/' );
		$out    = array();
		foreach ( array_keys( rest_get_server()->get_routes() ) as $route ) {
			if ( ! preg_match( self::INBOUND, $route ) || preg_match( self::OWN, $route ) ) {
				continue;
			}
			$plain = rtrim( preg_split( '/[(?]/', $route )[0], '/' );
			if ( strlen( $plain ) > 1 ) {
				$out[ $prefix . $plain ] = true;
			}
		}
		return array_slice( array_keys( $out ), 0, 30 );
	}

	private static function own_path( $url ) {
		if ( ! is_string( $url ) || '' === $url ) {
			return null;
		}
		$host = wp_parse_url( home_url( '/' ), PHP_URL_HOST );
		if ( wp_parse_url( $url, PHP_URL_HOST ) !== $host ) {
			return null;
		}
		$path = (string) wp_parse_url( $url, PHP_URL_PATH );
		$path = '/' . trim( $path, '/' );
		return strlen( $path ) <= 200 ? $path : null;
	}

	private static function published( $type ) {
		$n = wp_count_posts( $type );
		return isset( $n->publish ) ? (int) $n->publish : 0;
	}

	private static function per_page() {
		return max( 1, (int) get_option( 'posts_per_page', 10 ) );
	}

	private static function shop_per_page() {
		if ( function_exists( 'wc_get_default_products_per_row' ) && function_exists( 'wc_get_default_product_rows_per_page' ) ) {
			return max( 1, (int) apply_filters( 'loop_shop_per_page', wc_get_default_products_per_row() * wc_get_default_product_rows_per_page() ) ); // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound -- WooCommerce's own filter.
		}
		return self::per_page();
	}

	private static function pages( $count, $per ) {
		return (int) ceil( max( 0, (int) $count ) / max( 1, (int) $per ) );
	}
}