// Function to Send Verification Code
function send_verification_code() {
    $email = sanitize_email($_POST['email']);
    $code = rand(100000, 999999);

    // Store the code in the user's session for later verification
    session_start();
    $_SESSION['verification_code'] = $code;

    // Prepare the email headers
    $headers = array(
        'From: Rice News Today <queries@ricenewstoday.com>', // Replace with your desired email address
        'Content-Type: text/html; charset=UTF-8'
    );

    // Send the verification code to the user's email
    $mail_sent = wp_mail($email, 'Email Verification Code', 'Your verification code is: ' . $code, $headers);

    if ($mail_sent) {
        wp_send_json_success();
    } else {
        wp_send_json_error('Failed to send email.');
    }
}
add_action('wp_ajax_send_verification_code', 'send_verification_code');
add_action('wp_ajax_nopriv_send_verification_code', 'send_verification_code');

// Function to Verify the Entered Code
function verify_code() {
    session_start();
    $entered_code = sanitize_text_field($_POST['entered_code']);

    if ($entered_code == $_SESSION['verification_code']) {
        wp_send_json_success();
    } else {
        wp_send_json_error();
    }
}
add_action('wp_ajax_verify_code', 'verify_code');
add_action('wp_ajax_nopriv_verify_code', 'verify_code');





// hide toolbar
add_action('after_setup_theme', 'hide_admin_bar_except_admin');
function hide_admin_bar_except_admin() {
    if (!current_user_can('administrator')) {
        show_admin_bar(false);
    }
}





// Add custom user filter for "Un Displayed Users" in dashboard users section
function add_un_displayed_user_filter($views) {
    global $wpdb;

    // Query for users who either have 'display_this_user' empty or no meta_key for 'display_this_user'
    $un_displayed_user_count = $wpdb->get_var(
        "SELECT COUNT(DISTINCT u.ID) 
         FROM $wpdb->users u 
         LEFT JOIN $wpdb->usermeta um ON u.ID = um.user_id AND um.meta_key = 'display_this_user'
         WHERE um.meta_value IS NULL OR um.meta_value = ''"
    );

    // Add custom link to the user filter
    $current = (isset($_GET['un_displayed_users'])) ? 'current' : '';
    $views['un_displayed_users'] = "<a href='" . admin_url('users.php?un_displayed_users=1') . "' class='$current'>Un Displayed Users ($un_displayed_user_count)</a>";

    return $views;
}
add_filter('views_users', 'add_un_displayed_user_filter');

// Modify user query to show users with an empty 'display_this_user' meta_key or no 'display_this_user' meta_key
function filter_users_by_un_displayed_meta($query) {
    global $pagenow;

    if (is_admin() && $pagenow == 'users.php' && isset($_GET['un_displayed_users'])) {
        $meta_query = array(
            'relation' => 'OR',
            array(
                'key'     => 'display_this_user',
                'value'   => '',
                'compare' => '=' // Users with empty 'display_this_user'
            ),
            array(
                'key'     => 'display_this_user',
                'compare' => 'NOT EXISTS'  // Users who don't have the 'display_this_user' meta key at all
            )
        );

        $query->set('meta_query', $meta_query);
    }
}
add_action('pre_get_users', 'filter_users_by_un_displayed_meta');





// Add email validation to accpt only .com and .net emails
function custom_email_validation_filter( $result, $tag ) {
    $tag = new WPCF7_FormTag( $tag );
    
    if ( 'your-email' == $tag->name ) { // Replace 'your-email' with the name of your email field.
        $email = isset( $_POST['your-email'] ) ? trim( $_POST['your-email'] ) : '';

        if ( !preg_match( '/\.(com|net)$/', $email ) ) {
            $result->invalidate( $tag, "We only accept email addresses ending with .com or .net." );
        }
    }

    return $result;
}
add_filter( 'wpcf7_validate_email*', 'custom_email_validation_filter', 20, 2 );
add_filter( 'wpcf7_validate_email', 'custom_email_validation_filter', 20, 2 );





// Add "Display Users" to the bulk actions dropdown
function register_bulk_display_users_action($bulk_actions) {
    $bulk_actions['display_users'] = __('Display Users', 'textdomain');
    return $bulk_actions;
}
add_filter('bulk_actions-users', 'register_bulk_display_users_action');

// Handle the "Display Users" bulk action
function handle_bulk_display_users_action($redirect_to, $doaction, $user_ids) {
    if ($doaction !== 'display_users') {
        return $redirect_to; // Exit if not the custom action
    }

    // Loop through the selected users and update the meta key 'display_this_user' to 'yes'
    foreach ($user_ids as $user_id) {
        update_user_meta($user_id, 'display_this_user', 'yes');
    }

    // Redirect back to the user management screen with a success message
    $redirect_to = add_query_arg('bulk_display_users', count($user_ids), $redirect_to);
    return $redirect_to;
}
add_filter('handle_bulk_actions-users', 'handle_bulk_display_users_action', 10, 3);

// Show a confirmation message after bulk action is processed
function bulk_display_users_admin_notice() {
    if (!empty($_GET['bulk_display_users'])) {
        $displayed_count = intval($_GET['bulk_display_users']);
        printf('<div id="message" class="updated notice is-dismissible"><p>' . 
               _n('%s user has been displayed.', '%s users have been displayed.', $displayed_count, 'textdomain') . 
               '</p></div>', $displayed_count);
    }
}
add_action('admin_notices', 'bulk_display_users_admin_notice');

// Enqueue Bootstrap and style.css dynamically
function my_custom_styles() {
    // Enqueue Bootstrap CSS from the theme's directory
    wp_enqueue_style('bootstrap-css', get_template_directory_uri() . '/assets/bootstrap/css/bootstrap.min.css', array(), null);
    
    // Enqueue style.css with cache-busting (versioned by time)
    wp_enqueue_style('my-style', get_template_directory_uri() . '/style.css', array(), time());
}
add_action('wp_enqueue_scripts', 'my_custom_styles');