import { HotPayload } from '../../types/hmrPayload.js';

interface FetchFunctionOptions {
    cached?: boolean;
    startOffset?: number;
}
type FetchResult = CachedFetchResult | ExternalFetchResult | ViteFetchResult;
interface CachedFetchResult {
    /**
     * If module cached in the runner, we can just confirm
     * it wasn't invalidated on the server side.
     */
    cache: true;
}
interface ExternalFetchResult {
    /**
     * The path to the externalized module starting with file://,
     * by default this will be imported via a dynamic "import"
     * instead of being transformed by vite and loaded with vite runner
     */
    externalize: string;
    /**
     * Type of the module. Will be used to determine if import statement is correct.
     * For example, if Vite needs to throw an error if variable is not actually exported
     */
    type: 'module' | 'commonjs' | 'builtin' | 'network';
}
interface ViteFetchResult {
    /**
     * Code that will be evaluated by vite runner
     * by default this will be wrapped in an async function
     */
    code: string;
    /**
     * File path of the module on disk.
     * This will be resolved as import.meta.url/filename
     * Will be equal to `null` for virtual modules
     */
    file: string | null;
    /**
     * Module ID in the server module graph.
     */
    id: string;
    /**
     * Module URL used in the import.
     */
    url: string;
    /**
     * Invalidate module on the client side.
     */
    invalidate: boolean;
}
type InvokeMethods = {
    fetchModule: (id: string, importer?: string, options?: FetchFunctionOptions) => Promise<FetchResult>;
};

type ModuleRunnerTransportHandlers = {
    onMessage: (data: HotPayload) => void;
    onDisconnection: () => void;
};
/**
 * "send and connect" or "invoke" must be implemented
 */
interface ModuleRunnerTransport {
    connect?(handlers: ModuleRunnerTransportHandlers): Promise<void> | void;
    disconnect?(): Promise<void> | void;
    send?(data: HotPayload): Promise<void> | void;
    invoke?(data: HotPayload): Promise<{
        result: any;
    } | {
        error: any;
    }>;
    timeout?: number;
}
interface NormalizedModuleRunnerTransport {
    connect?(onMessage?: (data: HotPayload) => void): Promise<void> | void;
    disconnect?(): Promise<void> | void;
    send(data: HotPayload): Promise<void>;
    invoke<T extends keyof InvokeMethods>(name: T, data: Parameters<InvokeMethods[T]>): Promise<ReturnType<Awaited<InvokeMethods[T]>>>;
}
declare const createWebSocketModuleRunnerTransport: (options: {
    createConnection: () => WebSocket;
    pingInterval?: number;
}) => Required<Pick<ModuleRunnerTransport, "connect" | "disconnect" | "send">>;

export { type ExternalFetchResult as E, type FetchFunctionOptions as F, type ModuleRunnerTransport as M, type NormalizedModuleRunnerTransport as N, type ViteFetchResult as V, type FetchResult as a, type ModuleRunnerTransportHandlers as b, createWebSocketModuleRunnerTransport as c };
