/**
 * types.ts - shared types and interfaces
 */
import tls from 'tls';
/** Default timeout value for queries */
export declare const DEFAULT_TIMEOUT: number;
/** Default tls connection port */
export declare const DEFAULT_PORT = 8860;
/**
 * Configuration for SQLite cloud connection
 * @note Options are all lowecase so they 1:1 compatible with C SDK
 */
export interface SQLiteCloudConfig {
    /** Connection string in the form of sqlitecloud://user:password@host:port/database?options */
    connectionstring?: string;
    /** User name is required unless connectionstring is provided */
    username?: string;
    /** Password is required unless connection string is provided */
    password?: string;
    /** True if password is hashed, default is false */
    password_hashed?: boolean;
    /** API key can be provided instead of username and password */
    apikey?: string;
    /** Host name is required unless connectionstring is provided, eg: xxx.sqlitecloud.io */
    host?: string;
    /** Port number for tls socket */
    port?: number;
    /** Connect using plain TCP port, without TLS encryption, NOT RECOMMENDED, TEST ONLY */
    insecure?: boolean;
    /** Optional query timeout passed directly to TLS socket */
    timeout?: number;
    /** Name of database to open */
    database?: string;
    /** Flag to tell the server to zero-terminate strings */
    zerotext?: boolean;
    /** Create the database if it doesn't exist? */
    create?: boolean;
    /** Database will be created in memory */
    memory?: boolean;
    compression?: boolean;
    /** Request for immediate responses from the server node without waiting for linerizability guarantees */
    non_linearizable?: boolean;
    /** Server should send BLOB columns */
    noblob?: boolean;
    /** Do not send columns with more than max_data bytes */
    maxdata?: number;
    /** Server should chunk responses with more than maxRows */
    maxrows?: number;
    /** Server should limit total number of rows in a set to maxRowset */
    maxrowset?: number;
    /** Custom options and configurations for tls socket, eg: additional certificates */
    tlsoptions?: tls.ConnectionOptions;
    /** True if we should force use of SQLite Cloud Gateway and websocket connections, default: true in browsers, false in node.js */
    usewebsocket?: boolean;
    /** Url where we can connect to a SQLite Cloud Gateway that has a socket.io deamon waiting to connect, eg. wss://host:4000 */
    gatewayurl?: string;
    /** Optional identifier used for verbose logging */
    clientid?: string;
    /** True if connection should enable debug logs */
    verbose?: boolean;
}
/** Metadata information for a set of rows resulting from a query */
export interface SQLCloudRowsetMetadata {
    /** Rowset version 1 has column's name, version 2 has extended metadata */
    version: number;
    /** Number of rows */
    numberOfRows: number;
    /** Number of columns */
    numberOfColumns: number;
    /** Columns' metadata */
    columns: {
        /** Column name in query (may be altered from original name) */
        name: string;
        /** Declare column type */
        type?: string;
        /** Database name */
        database?: string;
        /** Database table */
        table?: string;
        /** Original name of the column */
        column?: string;
        /** Column is not nullable? 1 */
        notNull?: number;
        /** Column is primary key? 1 */
        primaryKey?: number;
        /** Column has autoincrement flag? 1 */
        autoIncrement?: number;
    }[];
}
/** Basic types that can be returned by SQLiteCloud APIs */
export type SQLiteCloudDataTypes = string | number | bigint | boolean | Record<string | number, unknown> | Buffer | null | undefined;
export interface SQLiteCloudCommand {
    query: string;
    parameters?: SQLiteCloudDataTypes[];
}
/** Custom error reported by SQLiteCloud drivers */
export declare class SQLiteCloudError extends Error {
    constructor(message: string, args?: Partial<SQLiteCloudError>);
    /** Upstream error that cause this error */
    cause?: Error | string;
    /** Error code returned by drivers or server */
    errorCode?: string;
    /** Additional error code */
    externalErrorCode?: string;
    /** Additional offset code in commands */
    offsetCode?: number;
}
export type ErrorCallback = (error: Error | null) => void;
export type ResultsCallback<T = any> = (error: Error | null, results?: T) => void;
export type RowsCallback<T = Record<string, any>> = (error: Error | null, rows?: T[]) => void;
export type RowCallback<T = Record<string, any>> = (error: Error | null, row?: T) => void;
export type RowCountCallback = (error: Error | null, rowCount?: number) => void;
export type PubSubCallback<T = any> = (error: Error | null, results?: T, extraData?: T) => void;
/**
 * Certain responses include arrays with various types of metadata.
 * The first entry is always an array type from this list. This enum
 * is called SQCLOUD_ARRAY_TYPE in the C API.
 */
export declare enum SQLiteCloudArrayType {
    ARRAY_TYPE_SQLITE_EXEC = 10,// used in SQLITE_MODE only when a write statement is executed (instead of the OK reply)
    ARRAY_TYPE_DB_STATUS = 11,
    ARRAY_TYPE_METADATA = 12,
    ARRAY_TYPE_VM_STEP = 20,// used in VM_STEP (when SQLITE_DONE is returned)
    ARRAY_TYPE_VM_COMPILE = 21,// used in VM_PREPARE
    ARRAY_TYPE_VM_STEP_ONE = 22,// unused in this version (will be used to step in a server-side rowset)
    ARRAY_TYPE_VM_SQL = 23,
    ARRAY_TYPE_VM_STATUS = 24,
    ARRAY_TYPE_VM_LIST = 25,
    ARRAY_TYPE_BACKUP_INIT = 40,// used in BACKUP_INIT
    ARRAY_TYPE_BACKUP_STEP = 41,// used in backupWrite (VFS)
    ARRAY_TYPE_BACKUP_END = 42,// used in backupClose (VFS)
    ARRAY_TYPE_SQLITE_STATUS = 50
}