// @FILE-SUBCLASS-01-EXCEPTION

/**
 * Client-side Ajax class for making API calls to RSX controllers
 *
 * Mirrors the PHP Ajax::call (Ajax::internal) functionality for browser-side JavaScript
 */
class Ajax {
    /**
     * Make an AJAX call to an RSX controller action
     *
     * All calls are automatically batched using Rsx_Ajax_Batch unless
     * window.rsxapp.ajax_disable_batching is true (for debugging).
     *
     * @param {string} controller - The controller class name (e.g., 'User_Controller')
     * @param {string} action - The action method name (e.g., 'get_profile')
     * @param {object} params - Parameters to send to the action
     * @returns {Promise} - Resolves with the return value, rejects with error
     */
    static async call(controller, action, params = {}) {
        // Route through batch system
        return Rsx_Ajax_Batch.call(controller, action, params);
    }

    /**
     * DEPRECATED: Direct call implementation (preserved for reference)
     * This is now handled by Rsx_Ajax_Batch
     * @private
     */
    static async _call_direct(controller, action, params = {}) {
        // Build the endpoint URL
        const url = `/_ajax/${controller}/${action}`;

        // Log the AJAX call using console_debug
        if (typeof Debugger !== 'undefined' && Debugger.console_debug) {
            Debugger.console_debug('AJAX', `Calling ${controller}.${action}`, params);
        }

        return new Promise((resolve, reject) => {
            $.ajax({
                url: url,
                method: 'POST',
                data: params,
                dataType: 'json',
                __local_integration: true, // Bypass $.ajax override - this is the official Ajax endpoint pattern
                success: (response) => {
                    // Handle console_debug messages if present
                    if (response.console_debug && Array.isArray(response.console_debug)) {
                        response.console_debug.forEach((msg) => {
                            // Messages must be structured as [channel, [arguments]]
                            if (!Array.isArray(msg) || msg.length !== 2) {
                                throw new Error('Invalid console_debug message format - expected [channel, [arguments]]');
                            }
                            const [channel, args] = msg;
                            // Output with channel as first argument, then spread the arguments
                            console.log(channel, ...args);
                        });
                    }

                    // Check if the response was successful
                    if (response.success === true) {
                        // Process the return value to instantiate any ORM models
                        const processedValue = Rsx_Js_Model._instantiate_models_recursive(response._ajax_return_value);
                        // Return the processed value
                        resolve(processedValue);
                    } else {
                        // Handle error responses
                        const error_type = response.error_type || 'unknown_error';
                        const reason = response.reason || 'Unknown error occurred';
                        const details = response.details || {};

                        // Handle specific error types
                        switch (error_type) {
                            case 'response_auth_required':
                                console.error(
                                    'The user is no longer authenticated, this is a placeholder for future code which handles this scenario.'
                                );
                                // Create an error object similar to PHP exceptions
                                const auth_error = new Error(reason);
                                auth_error.type = 'auth_required';
                                auth_error.details = details;
                                reject(auth_error);
                                break;

                            case 'response_unauthorized':
                                console.error(
                                    'The user is unauthorized to perform this action, this is a placeholder for future code which handles this scenario.'
                                );
                                const unauth_error = new Error(reason);
                                unauth_error.type = 'unauthorized';
                                unauth_error.details = details;
                                reject(unauth_error);
                                break;

                            case 'response_form_error':
                                // Form validation errors
                                const form_error = new Error(reason);
                                form_error.type = 'form_error';
                                form_error.details = details;
                                reject(form_error);
                                break;

                            case 'response_fatal_error':
                                // Fatal errors
                                const fatal_error = new Error(reason);
                                fatal_error.type = 'fatal_error';
                                fatal_error.details = details;

                                // Log to server if browser error logging is enabled
                                Debugger.log_error({
                                    message: `Ajax Fatal Error: ${reason}`,
                                    type: 'ajax_fatal',
                                    endpoint: url,
                                    details: details,
                                });

                                reject(fatal_error);
                                break;

                            default:
                                // Unknown error type
                                const generic_error = new Error(reason);
                                generic_error.type = error_type;
                                generic_error.details = details;
                                reject(generic_error);
                                break;
                        }
                    }
                },
                error: (xhr, status, error) => {
                    // Handle network or server errors
                    let error_message = 'Network or server error';

                    if (xhr.responseJSON && xhr.responseJSON.message) {
                        error_message = xhr.responseJSON.message;
                    } else if (xhr.responseText) {
                        try {
                            const response = JSON.parse(xhr.responseText);
                            if (response.message) {
                                error_message = response.message;
                            }
                        } catch (e) {
                            // If response is not JSON, use the status text
                            error_message = `${status}: ${error}`;
                        }
                    } else {
                        error_message = `${status}: ${error}`;
                    }

                    const network_error = new Error(error_message);
                    network_error.type = 'network_error';
                    network_error.status = xhr.status;
                    network_error.statusText = status;

                    // Log server errors (500+) to the server if browser error logging is enabled
                    if (xhr.status >= 500) {
                        Debugger.log_error({
                            message: `Ajax Server Error ${xhr.status}: ${error_message}`,
                            type: 'ajax_server_error',
                            endpoint: url,
                            status: xhr.status,
                            statusText: status,
                        });
                    }

                    reject(network_error);
                },
            });
        });
    }

    /**
     * Parses an AJAX URL into controller and action
     * @param {string} url - URL in format '/_ajax/Controller_Name/action_name'
     * @returns {Object} Object with {controller: string, action: string}
     * @throws {Error} If URL doesn't start with /_ajax or has invalid structure
     */
    static ajax_url_to_controller_action(url) {
        if (!url.startsWith('/_ajax')) {
            throw new Error(`URL must start with /_ajax, got: ${url}`);
        }

        const parts = url.split('/').filter((part) => part !== '');

        if (parts.length < 2) {
            throw new Error(`Invalid AJAX URL structure: ${url}`);
        }

        if (parts.length > 3) {
            throw new Error(`AJAX URL has too many segments: ${url}`);
        }

        const controller = parts[1];
        const action = parts[2] || 'index';

        return { controller, action };
    }
}