/**
 * WP Prometheus Admin JavaScript
 *
 * @package WP_Prometheus
 */

(function($) {
    'use strict';

    $(document).ready(function() {
        // Validate license button.
        $('#wp-prometheus-validate-license').on('click', function(e) {
            e.preventDefault();
            performLicenseAction('wp_prometheus_validate_license', 'Validating...');
        });

        // Activate license button.
        $('#wp-prometheus-activate-license').on('click', function(e) {
            e.preventDefault();
            performLicenseAction('wp_prometheus_activate_license', 'Activating...');
        });

        // Regenerate token button.
        $('#wp-prometheus-regenerate-token').on('click', function(e) {
            e.preventDefault();
            if (confirm('Are you sure you want to regenerate the auth token? You will need to update your Prometheus configuration.')) {
                var newToken = generateToken(32);
                $('#wp_prometheus_auth_token').val(newToken);
            }
        });

        /**
         * Perform a license action via AJAX.
         *
         * @param {string} action AJAX action name.
         * @param {string} message Loading message.
         */
        function performLicenseAction(action, message) {
            var $spinner = $('#wp-prometheus-license-spinner');
            var $message = $('#wp-prometheus-license-message');

            $spinner.addClass('is-active');
            $message.hide();

            $.ajax({
                url: wpPrometheus.ajaxUrl,
                type: 'POST',
                data: {
                    action: action,
                    nonce: wpPrometheus.nonce
                },
                success: function(response) {
                    $spinner.removeClass('is-active');

                    if (response.success) {
                        $message
                            .removeClass('notice-error')
                            .addClass('notice notice-success')
                            .html('<p>' + response.data.message + '</p>')
                            .show();

                        // Reload page after successful validation/activation.
                        setTimeout(function() {
                            location.reload();
                        }, 1500);
                    } else {
                        $message
                            .removeClass('notice-success')
                            .addClass('notice notice-error')
                            .html('<p>' + (response.data.message || 'An error occurred.') + '</p>')
                            .show();
                    }
                },
                error: function() {
                    $spinner.removeClass('is-active');
                    $message
                        .removeClass('notice-success')
                        .addClass('notice notice-error')
                        .html('<p>Connection error. Please try again.</p>')
                        .show();
                }
            });
        }

        /**
         * Generate a random token.
         *
         * @param {number} length Token length.
         * @return {string} Generated token.
         */
        function generateToken(length) {
            var charset = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
            var token = '';
            for (var i = 0; i < length; i++) {
                token += charset.charAt(Math.floor(Math.random() * charset.length));
            }
            return token;
        }
    });
})(jQuery);