import type { AnyElysia } from 'elysia';
import type { EdenLink, Operation, OperationResultEnvelope } from './internal/operation';
type ConsoleEsque = {
    log: (...args: any[]) => void;
    error: (...args: any[]) => void;
};
type EnableFnOptions = {
    direction: 'down';
    result: OperationResultEnvelope<unknown> | unknown;
} | (Operation & {
    direction: 'up';
});
type EnabledFn = (opts: EnableFnOptions) => boolean;
type LoggerLinkFnOptions = Operation & ({
    /**
     * Request result
     */
    direction: 'down';
    result: OperationResultEnvelope<unknown> | unknown;
    elapsedMs: number;
} | {
    /**
     * Request was just initialized
     */
    direction: 'up';
});
type LoggerLinkFn = (opts: LoggerLinkFnOptions) => void;
type ColorMode = 'ansi' | 'css' | 'none';
export interface LoggerLinkOptions {
    logger?: LoggerLinkFn;
    enabled?: EnabledFn;
    /**
     * Used in the built-in defaultLogger
     */
    console?: ConsoleEsque;
    /**
     * Color mode
     * @default typeof window === 'undefined' ? 'ansi' : 'css'
     */
    colorMode?: ColorMode;
    /**
     * Include context in the log - defaults to false unless `colorMode` is 'css'
     */
    withContext?: boolean;
}
export type ExtendedLoggerFnOptions = LoggerLinkFnOptions & {
    colorMode: ColorMode;
    withContext?: boolean;
};
export type LoggerOptions = {
    c?: ConsoleEsque;
    colorMode?: ColorMode;
    withContext?: boolean;
};
/**
 * @see https://trpc.io/docs/v11/client/links/loggerLink
 */
export declare function loggerLink<T extends AnyElysia>(options?: LoggerLinkOptions): EdenLink<T>;
export {};
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