import { ClientSyncMessage, CloseReason } from '../../@triplit/types/sync.js';
/**
 * Possible values reflect the WebSocket readyState: https://developer.mozilla.org/en-US/docs/Web/API/WebSocket/readyState
 *
 * - CONNECTING: An attempt to connect is being made
 * - OPEN: The connection is open and ready to communicate
 * - CLOSING: The connection is in the process of closing
 * - CLOSED: The connection is closed or couldn't be opened
 */
export type ConnectionStatus = 'UNINITIALIZED' | 'CONNECTING' | 'OPEN' | 'CLOSING' | 'CLOSED';
export interface SyncTransport {
    isOpen: boolean;
    connectionStatus: ConnectionStatus;
    /**
     * Sends a message to the server. If the message could not be sent, this should return false. If successfully sent, this should return true.
     */
    sendMessage(message: ClientSyncMessage): boolean;
    /**
     * Connect to the server with the given parameters. If this transport is already connected, it should close the existing connection and open a new one.
     */
    connect(params: TransportConnectParams): void;
    /**
     * Closes the connection to the server. If the transport is not connected, this should be a no op.
     */
    close(reason?: CloseReason): void;
    onClose(callback: (ev: any) => void): void;
    /**
     * @deprecated Triplit Client now manages its own connection state, so this is no longer needed.
     */
    onConnectionChange(callback: (state: ConnectionStatus) => void): void;
    onError(callback: (ev: any) => void): void;
    onMessage(callback: (message: any) => void): void;
    onOpen(callback: (ev: any) => void): void;
}
export type TransportConnectParams = {
    server: string;
    token: string;
    schema: number | undefined;
    syncSchema?: boolean;
};