// Register the quiz fields in the WPF settings

function wpf_add_learndash_quiz_fields( $meta_fields ) {

    $args = array(
        'post_type' => 'sfwd-quiz',
        'nopaging'  => true,
    );

    $quizzes = get_posts( $args );

    foreach ( $quizzes as $quiz ) {

        $meta_fields[ 'quiz_' . $quiz->ID . '_pass' ] = array(
            'label' => $quiz->post_title . ' - Pass',
            'type'  => 'checkbox',
            'group' => 'learndash_progress',
        );

        $meta_fields[ 'quiz_' . $quiz->ID . '_pass_date' ] = array(
            'label' => $quiz->post_title . ' - Pass Date',
            'type'  => 'date',
            'group' => 'learndash_progress',
        );

        $meta_fields[ 'quiz_' . $quiz->ID . '_fail' ] = array(
            'label' => $quiz->post_title . ' - Fail',
            'type'  => 'checkbox',
            'group' => 'learndash_progress',
        );

        $meta_fields[ 'quiz_' . $quiz->ID . '_fail_date' ] = array(
            'label' => $quiz->post_title . ' - Fail Date',
            'type'  => 'date',
            'group' => 'learndash_progress',
        );

    }

    return $meta_fields;

}


add_filter( 'wpf_meta_fields', 'wpf_add_learndash_quiz_fields' );

// Sync the pass / fail data to the custom fields

function wpf_quiz_completed( $data, $user ) {

    if ( isset( $data['quiz']->ID ) ) {
        $quiz_id = $data['quiz']->ID;
    } else {
        // For grading in the admin
        $quiz_id = $data['quiz'];
    }

    if ( true == $data['pass'] ) {

        $update_data = array(
            'quiz_' . $quiz_id . '_pass'      => true,
            'quiz_' . $quiz_id . '_pass_date' => time(),
            'quiz_' . $quiz_id . '_fail'      => false,
        );

    } elseif ( false == $data['pass'] ) {

        $update_data = array(
            'quiz_' . $quiz_id . '_pass'      => false,
            'quiz_' . $quiz_id . '_fail'      => true,
            'quiz_' . $quiz_id . '_fail_date' => time(),
        );

    }

    wp_fusion()->user->push_user_meta( $user->ID, $update_data );

}

add_action( 'learndash_quiz_completed', 'wpf_quiz_completed', 5, 2 );