/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { parseSlashCommand } from './utils/commands.js';
import { FatalInputError, Logger, uiTelemetryService, } from 'sixth-cli-core';
import { CommandService } from './services/CommandService.js';
import { FileCommandLoader } from './services/FileCommandLoader.js';
import { McpPromptLoader } from './services/McpPromptLoader.js';
import { createNonInteractiveUI } from './ui/noninteractive/nonInteractiveUi.js';
/**
 * Processes a slash command in a non-interactive environment.
 *
 * @returns A Promise that resolves to `PartListUnion` if a valid command is
 *   found and results in a prompt, or `undefined` otherwise.
 * @throws {FatalInputError} if the command result is not supported in
 *   non-interactive mode.
 */
export const handleSlashCommand = async (rawQuery, abortController, config, settings) => {
    const trimmed = rawQuery.trim();
    if (!trimmed.startsWith('/')) {
        return;
    }
    const commandService = await CommandService.create([new McpPromptLoader(config), new FileCommandLoader(config)], abortController.signal);
    const commands = commandService.getCommands();
    const { commandToExecute, args } = parseSlashCommand(rawQuery, commands);
    if (commandToExecute) {
        if (commandToExecute.action) {
            // Not used by custom commands but may be in the future.
            const sessionStats = {
                sessionId: config?.getSessionId(),
                sessionStartTime: new Date(),
                metrics: uiTelemetryService.getMetrics(),
                lastPromptTokenCount: 0,
                promptCount: 1,
            };
            const logger = new Logger(config?.getSessionId() || '', config?.storage);
            const context = {
                services: {
                    config,
                    settings,
                    git: undefined,
                    logger,
                },
                ui: createNonInteractiveUI(),
                session: {
                    stats: sessionStats,
                    sessionShellAllowlist: new Set(),
                },
                invocation: {
                    raw: trimmed,
                    name: commandToExecute.name,
                    args,
                },
            };
            const result = await commandToExecute.action(context, args);
            if (result) {
                switch (result.type) {
                    case 'submit_prompt':
                        return result.content;
                    case 'confirm_shell_commands':
                        // This result indicates a command attempted to confirm shell commands.
                        // However note that currently, ShellTool is excluded in non-interactive
                        // mode unless 'YOLO mode' is active, so confirmation actually won't
                        // occur because of YOLO mode.
                        // This ensures that if a command *does* request confirmation (e.g.
                        // in the future with more granular permissions), it's handled appropriately.
                        throw new FatalInputError('Exiting due to a confirmation prompt requested by the command.');
                    default:
                        throw new FatalInputError('Exiting due to command result that is not supported in non-interactive mode.');
                }
            }
        }
    }
    return;
};
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