/*
 * Adding Cloudflare Turnstile to Login Form by wpcookie
 * https://redpishi.com/wordpress-tutorials/cloudflare-turnstile-captcha-wordpress/
 */	
function login_style() {
    wp_register_script('login-recaptcha', 'https://challenges.cloudflare.com/turnstile/v0/api.js', false, NULL);
    wp_enqueue_script('login-recaptcha');
	echo "<style>p.submit, p.forgetmenot {margin-top: 10px!important;}.login form{width: 303px;} div#login_error {width: 322px;}</style>";
}
add_action('login_enqueue_scripts', 'login_style');

add_action('login_form', function(){
	echo '<div class="cf-turnstile" data-sitekey="'.cloudflare_key()[0].'"></div>';
	} );

add_action('wp_authenticate_user', function($user, $password) {
	$captcha=$_POST['cf-turnstile-response'];
	if (!$captcha) {
     return new WP_Error('Captcha Invalid', __('<center>Captcha Invalid! Please check the captcha!</center>'));
	   die();
           exit;
   }
   $secretKey = cloudflare_key()[1];
   $ip = $_SERVER['REMOTE_ADDR'];

   $url_path = 'https://challenges.cloudflare.com/turnstile/v0/siteverify';
   $data = array('secret' => $secretKey, 'response' => $captcha, 'remoteip' => $ip);
	
	$options = array(
		'http' => array(
		'method' => 'POST',
		'content' => http_build_query($data))
	);
	
	$stream = stream_context_create($options);
	
	$result = file_get_contents(
			$url_path, false, $stream);
	
	$response =  $result;
   
   $responseKeys = json_decode($response,true);
	  if(intval($responseKeys["success"]) !== 1) {
		   return new WP_Error('Captcha Invalid', __('<center>لطفا کپچا را تیک بزنید!</center>'));
		  die();
		   exit;
	  } else { 
		  return $user;
}
	
	} , 10, 2);

/*
 * Adding Cloudflare Turnstile to WordPress Comment
 * https://redpishi.com/wordpress-tutorials/cloudflare-turnstile-captcha-wordpress/
 */	
function is_valid_captcha($captcha) {
	
   if (!$captcha) {
     return false;
   }
   $secretKey = cloudflare_key()[1];
   $ip = $_SERVER['REMOTE_ADDR'];

   $url_path = 'https://challenges.cloudflare.com/turnstile/v0/siteverify';
   $data = array('secret' => $secretKey, 'response' => $captcha, 'remoteip' => $ip);
	
	$options = array(
		'http' => array(
		'method' => 'POST',
		'content' => http_build_query($data))
	);
	
	$stream = stream_context_create($options);
	
	$result = file_get_contents(
			$url_path, false, $stream);
	
	$response =  $result;
   
   $responseKeys = json_decode($response,true);
	  if(intval($responseKeys["success"]) !== 1) {
		   return false;
	  } else { 
		  return true;
}
}
	
add_action('init', function(){
	if (!is_user_logged_in() ) {
    add_action('pre_comment_on_post', function(){
		$recaptcha = $_POST['cf-turnstile-response'];
	if (empty($recaptcha))
    wp_die( __("<b>ERROR:</b> please select <b>I'm not a robot!</b><p><a href='javascript:history.back()'>« Back</a></p>"));
	else if (!is_valid_captcha($recaptcha))
    wp_die( __("<b>please select I'm not a robot!</b>"));
		
		} );

    add_filter('comment_form_defaults',function ($submit_field) {

		    $submit_field['submit_field'] = '<div class="cf-turnstile" data-sitekey="'.cloudflare_key()[0].'"></div><br>'.$submit_field['submit_field'];
    return $submit_field;	
	});
}	
	});

/*
 * Adding Cloudflare Turnstile to WordPress Lost Password form
 * https://redpishi.com/wordpress-tutorials/cloudflare-turnstile-captcha-wordpress/
 */	
add_action('lostpassword_form', function() {
    echo '<script src="https://challenges.cloudflare.com/turnstile/v0/api.js" async defer></script>';
    echo '<div class="cf-turnstile" data-sitekey="'.cloudflare_key()[0].'"></div>';
	echo '<style>p.message {width: 324px;}</style>';
});

add_action( 'lostpassword_post', function($errors) {

    if ( !empty($_POST['cf-turnstile-response'] )) {
	$secretKey = cloudflare_key()[1];
   $ip = $_SERVER['REMOTE_ADDR'];
	$captcha = $_POST['cf-turnstile-response'];
	
   $url_path = 'https://challenges.cloudflare.com/turnstile/v0/siteverify';
   $data = array('secret' => $secretKey, 'response' => $captcha, 'remoteip' => $ip);
	
	$options = array(
		'http' => array(
		'method' => 'POST',
		'content' => http_build_query($data))
	);
	
	$stream = stream_context_create($options);
	
	$result = file_get_contents($url_path, false, $stream);
	
	$response =  $result;
   
   $responseKeys = json_decode($response,true);
	  if(intval($responseKeys["success"]) !== 1) {$errors->add('Captcha Invalid', __('Captcha Invalid! Please check the captcha!'));} 
    
    } else {
        $errors->add('Captcha Invalid', __('Captcha Invalid! Please check the captcha!'));
    }
}, 10, 1 );

/*
 * Adding Cloudflare Turnstile to WordPress Registration page
 * https://redpishi.com/wordpress-tutorials/cloudflare-turnstile-captcha-wordpress/
 */	

add_action('register_form', function() {
    echo '<script src="https://challenges.cloudflare.com/turnstile/v0/api.js" async defer></script>';
    echo '<div class="cf-turnstile" data-sitekey="'.cloudflare_key()[0].'"></div>';
	echo'<style>p.message.register {
    width: 324px;
}</style>';
});
add_action('registration_errors', function($errors, $user_login, $user_email) {
    if (!empty($_POST['cf-turnstile-response'] )) {
		
	$captcha = 	$_POST['cf-turnstile-response'];
   $secretKey = cloudflare_key()[1];
   $ip = $_SERVER['REMOTE_ADDR'];

   $url_path = 'https://challenges.cloudflare.com/turnstile/v0/siteverify';
   $data = array('secret' => $secretKey, 'response' => $captcha, 'remoteip' => $ip);
	
	$options = array(
		'http' => array(
		'method' => 'POST',
		'content' => http_build_query($data))
	);
	
	$stream = stream_context_create($options);
	
	$result = file_get_contents(
			$url_path, false, $stream);
	
	$response =  $result;
   $responseKeys = json_decode($response,true);
        
        
        
        if (   intval($responseKeys["success"]) == 1   ) {
            return $errors;
        } else {
            return new WP_Error('Captcha Invalid', __('Captcha Invalid! Please check the captcha!'));
        }
    } else {
        return new WP_Error('Captcha Invalid', __('Captcha Invalid! Please check the captcha!'));
    }
}, 10, 3);

add_action("wp_footer", function(){	?>
	<style>
		.wpcf7 input[name="c"] {
			display: none;
		}
		.wpcf7 .cf-turnstile {
			margin-top: -10px;
		}
</style>
	<?php
	} );
function add_custom_element_before_submit( $form ) {
	$cf = '<div class="cf-turnstile" data-sitekey="'.cloudflare_key()[0].'"></div>';
	$form = preg_replace('/\[[ ]*c[ ]*\]/', $cf, $form);	
    return $form;
}
add_filter( 'wpcf7_form_elements', 'add_custom_element_before_submit' );


add_filter('wpcf7_validate', function($result, $tag){
	$turnstile_token = isset($_POST['cf-turnstile-response']) ? sanitize_text_field($_POST['cf-turnstile-response']) : '';
	$ct = "c";
    if (empty($turnstile_token)) {
		$result->invalidate($ct, 'لطفا کپچا را تیک بزنید.');
        return $result;
    }

    $secret_key = cloudflare_key()[1];
    $remote_ip = $_SERVER['REMOTE_ADDR'];

    $response = wp_remote_post('https://challenges.cloudflare.com/turnstile/v0/siteverify', array(
        'body' => array(
            'secret' => $secret_key,
            'response' => $turnstile_token,
            'remoteip' => $remote_ip,
        ),
    ));

    if (is_wp_error($response)) {
		 $result->invalidate($ct,  'کپچا نامعتبر است، لطفا دوباره تلاش کنید');
        return $result;
    }

    $body = wp_remote_retrieve_body($response);
    $data = json_decode($body, true);

    if (!$data['success']) {
        $result->invalidate($ct, 'کپچا نامعتبر است، لطفا دوباره آن را تکمیل کنید.');
        return $result;
    }

    return $result;
}, 10, 2);