import type { ChildProcess } from 'child_process';
/**
 * Thrown when the bridge socket closes (Godot exited, port closed, or peer
 * dropped the connection mid-flight). Lets callers distinguish
 * "session ended" from generic transport errors.
 */
export declare class BridgeDisconnectedError extends Error {
    constructor(message: string);
}
export declare const BRIDGE_WAIT_SPAWNED_TIMEOUT_MS = 8000;
/**
 * Normalize a path for cross-platform comparison.
 * Folds Windows backslashes to forward slashes and strips trailing slashes,
 * so Node's `path.normalize` output matches Godot's `globalize_path("res://")`.
 */
export declare function normalizeForCompare(p: string): string;
/**
 * Extract JSON from Godot output by finding the first { or [ and matching to the end.
 * This strips debug logs, version banners, and other noise.
 */
export declare function extractJson(output: string): string;
/**
 * Strip Godot banner and debug lines from output, keeping only meaningful content.
 */
export declare function cleanOutput(output: string): string;
export declare function cleanStdout(stdout: string): string;
export interface GodotProcess {
    process: ChildProcess;
    output: string[];
    errors: string[];
    totalErrorsWritten: number;
    exitCode: number | null;
    hasExited: boolean;
    sessionToken: string;
}
export type RuntimeSessionMode = 'spawned' | 'attached';
export interface RuntimeStopResult {
    mode: RuntimeSessionMode;
    output: string[];
    errors: string[];
    externalProcessPreserved?: boolean;
}
export interface GodotServerConfig {
    godotPath?: string;
    debugMode?: boolean;
}
export interface OperationParams {
    [key: string]: unknown;
}
export interface OperationResult {
    stdout: string;
    stderr: string;
}
export interface ToolAnnotations {
    readOnlyHint?: boolean;
    destructiveHint?: boolean;
    idempotentHint?: boolean;
    openWorldHint?: boolean;
    title?: string;
}
export interface ToolDefinition {
    name: string;
    description: string;
    inputSchema: {
        type: string;
        properties: Record<string, unknown>;
        required: string[];
    };
    outputSchema?: {
        type: string;
        properties?: Record<string, unknown>;
        required?: string[];
    };
    annotations?: ToolAnnotations;
}
export interface ToolResponse {
    content: Array<{
        type: string;
        text?: string;
        [k: string]: unknown;
    }>;
    isError?: boolean;
    structuredContent?: Record<string, unknown>;
    [k: string]: unknown;
}
export type ToolHandler = (runner: GodotRunner, args: OperationParams) => Promise<ToolResponse> | ToolResponse;
export declare function normalizeParameters(params: OperationParams): OperationParams;
export declare function convertCamelToSnakeCase(params: OperationParams): OperationParams;
/**
 * Check whether a display server (X11 / Wayland) is available on the current
 * platform.  On macOS and Windows the display subsystem is always present;
 * on Linux we probe the standard environment variables.
 */
export declare function checkDisplayAvailable(): boolean;
export declare function validatePath(path: string): boolean;
/**
 * Stricter check for paths that must stay inside `projectPath`. Rejects `..`
 * (via `validatePath`) and absolute paths that escape the project root.
 * `path.join('/project', '/etc/passwd')` resolves to `/etc/passwd`, so the
 * basic `..`-substring check alone permits absolute-path traversal.
 *
 * Tolerates a leading `res://` (Godot's project-root URI) by stripping it
 * before resolving — autoload entries and resource paths use this prefix.
 */
export declare function validateSubPath(projectPath: string, userPath: string): boolean;
/**
 * Validate a Godot scene-tree path (NodePath). Scene-tree paths are a
 * separate namespace from filesystem paths — they address nodes inside
 * a scene, not files on disk, so the project-root containment check
 * in `validateSubPath` does not apply.
 *
 * Rejects empty strings and `..` segments. Accepts both relative
 * (`root/Player`) and absolute (`/root/Player`) Godot forms; the
 * codebase convention is the relative form.
 */
export declare function validateNodePath(path: string): boolean;
/**
 * True when `child` resolves to `parent` or a path beneath it. Used by
 * defense-in-depth checks on bridge-returned paths (e.g. screenshot files
 * that must live under `.mcp/screenshots/`).
 */
export declare function isUnderDir(parent: string, child: string): boolean;
/**
 * Return `error.message` when `error` is an `Error`, otherwise `'Unknown error'`.
 * Centralizes the catch-block boilerplate so handlers can build error responses
 * without repeating the `instanceof Error` ternary.
 */
export declare function getErrorMessage(error: unknown): string;
/**
 * Build the absolute path to a project's `project.godot` manifest. Use this
 * instead of `join(dir, 'project.godot')` ad hoc.
 */
export declare function projectGodotPath(projectDir: string): string;
/**
 * Extract the first [ERROR] message from GDScript stderr output.
 * Falls back to a generic message if no [ERROR] line is found.
 */
export declare function extractGdError(stderr: string): string;
export declare function createErrorResponse(message: string, possibleSolutions?: string[]): {
    content: Array<{
        type: 'text';
        text: string;
    }>;
    isError: boolean;
};
/**
 * Wrap a structured payload as a ToolResponse that satisfies the MCP
 * outputSchema contract. The same payload is emitted both as a JSON text
 * content block (for lenient clients) and as `structuredContent` (required
 * by strict clients per MCP spec revision 2025-06-18).
 *
 * `extraContent` is prepended for handlers that also return non-text blocks
 * (e.g. `take_screenshot`'s inline image).
 */
export declare function createStructuredResponse<T extends Record<string, unknown>>(payload: T, extraContent?: Array<{
    type: string;
    [k: string]: unknown;
}>): ToolResponse;
interface ValidatedProjectArgs {
    projectPath: string;
}
interface ValidatedSceneArgs {
    projectPath: string;
    scenePath: string;
}
type ValidationErrorResult = ReturnType<typeof createErrorResponse>;
export declare function validateProjectArgs(args: OperationParams): ValidatedProjectArgs | ValidationErrorResult;
export declare function validateSceneArgs(args: OperationParams, opts?: {
    sceneRequired?: boolean;
}): ValidatedSceneArgs | ValidationErrorResult;
export declare class GodotRunner {
    private godotPath;
    private operationsScriptPath;
    private bridge;
    private validatedPaths;
    private cachedVersion;
    activeProcess: GodotProcess | null;
    activeProjectPath: string | null;
    activeSessionMode: RuntimeSessionMode | null;
    activeBridgePort: number | null;
    private socket;
    private rxChunks;
    private rxTotal;
    private inFlight;
    constructor(config?: GodotServerConfig);
    private isValidGodotPathSync;
    private spawnAsync;
    private isValidGodotPath;
    detectGodotPath(): Promise<void>;
    getGodotPath(): string | null;
    /**
     * Read the port currently baked into the project's bridge script. Returns
     * null if the file is missing or malformed. Thin pass-through to
     * BridgeManager — used by bridge-wait-timeout race detection.
     */
    readBakedBridgePort(projectPath: string): number | null;
    getVersion(): Promise<string>;
    executeOperation(operation: string, params: OperationParams, projectPath: string, timeoutMs?: number): Promise<OperationResult>;
    launchEditor(projectPath: string): ChildProcess;
    runProject(projectPath: string, scene?: string, background?: boolean, bridgePort?: number): Promise<GodotProcess>;
    attachProject(projectPath: string, bridgePort?: number): Promise<void>;
    stopProject(): Promise<RuntimeStopResult | null>;
    hasActiveRuntimeSession(): boolean;
    /**
     * Send a JSON command to the McpBridge over a long-lived TCP connection.
     *
     * MCP serializes tool calls so we hold one in-flight command at a time. The
     * socket is lazy-connected on first call and persists across commands until
     * `closeConnection` (or a peer-side close). A close mid-flight rejects with
     * `BridgeDisconnectedError`; a per-command timeout rejects but does NOT
     * close the socket — a slow command does not invalidate the session.
     */
    sendCommand(command: string, params?: Record<string, unknown>, timeoutMs?: number): Promise<string>;
    /**
     * Tear down the bridge socket. Idempotent. Any in-flight command is
     * rejected with a session-ended error.
     */
    closeConnection(): void;
    private resetRxBuffer;
    getErrorCount(): number;
    getErrorsSince(marker: number): string[];
    private static readonly SCRIPT_ERROR_PATTERNS;
    private static readonly RETRYABLE_BRIDGE_COMMANDS;
    extractRuntimeErrors(lines: string[]): string[];
    private sendCommandWithReconnect;
    sendCommandWithErrors(command: string, params?: Record<string, unknown>, timeoutMs?: number): Promise<{
        response: string;
        runtimeErrors: string[];
    }>;
    /**
     * Shared poll loop for `waitForBridge` (spawned) and `waitForBridgeAttached`.
     * Sends `ping` payloads until the bridge replies with a pong that
     * `validatePong` accepts, the deadline passes, or `shouldAbort` reports
     * the spawned process has exited.
     */
    private pollBridge;
    waitForBridgeAttached(timeoutMs?: number, intervalMs?: number): Promise<{
        ready: boolean;
        error?: string;
    }>;
    waitForBridge(timeoutMs?: number, intervalMs?: number): Promise<{
        ready: boolean;
        error?: string;
    }>;
    getRecentErrors(count?: number): string[];
}
export {};
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