<?php

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

class Rabbitproof_Front {

	const HANDLE     = 'rabbitproof-check';
	const PROOF_PATH = '/.well-known/rabbitproof-verify.txt';

	public static function register() {
		add_action( 'wp_enqueue_scripts', array( __CLASS__, 'enqueue' ) );
		add_action( 'login_enqueue_scripts', array( __CLASS__, 'enqueue' ) );
		add_filter( 'script_loader_tag', array( __CLASS__, 'tag' ), 10, 2 );
		add_action( 'init', array( __CLASS__, 'proof' ), 0 );
	}

	public static function enqueue() {
		$key = Rabbitproof_Options::get( 'site_key' );
		if ( ! Rabbitproof_Options::valid_site_key( $key ) || Rabbitproof_Options::gone() ) {
			return;
		}

		if ( '' !== Rabbitproof_Guard::edge_key() ) {
			return;
		}
		wp_enqueue_script(
			self::HANDLE,
			Rabbitproof_Api::BASE . '/v1/rp.js',
			array(),
			null, // phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion -- the service versions its own script.
			array(
				'strategy'  => 'async',
				'in_footer' => false,
			)
		);
	}

	public static function tag( $tag, $handle ) {
		if ( self::HANDLE !== $handle ) {
			return $tag;
		}
		$key = Rabbitproof_Options::get( 'site_key' );
		if ( ! Rabbitproof_Options::valid_site_key( $key ) || false !== strpos( $tag, 'data-site=' ) ) {
			return $tag;
		}

		return str_replace( '<script ', '<script data-site="' . esc_attr( $key ) . '" ', $tag );
	}

	public static function proof() {
		$uri  = isset( $_SERVER['REQUEST_URI'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REQUEST_URI'] ) ) : '';
		$path = (string) wp_parse_url( $uri, PHP_URL_PATH );
		if ( self::PROOF_PATH !== $path ) {
			return;
		}
		$line = Rabbitproof_Options::get( 'proof' );
		if ( 1 !== preg_match( '/^rabbitproof-verify=[0-9a-f]{32}$/', $line ) ) {
			return;
		}
		nocache_headers();
		header( 'Content-Type: text/plain; charset=utf-8' );
		echo esc_html( $line );
		exit;
	}
}