import type { AnyString, Dictionary, Highlighter } from '../typings';
export interface Logger {
    /**
     * Logs a message inside given namespace.
     */
    log(namespace: LoggerNamespace | AnyString, message: string, context?: LogContext): void;
    /**
     * Logs error message inside given namespace.
     */
    error(namespace: LoggerNamespace | AnyString, message: string, context?: LogContext): void;
    /**
     * Logs warning message inside given namespace.
     */
    warn(namespace: LoggerNamespace | AnyString, message: string, context?: LogContext): void;
    /**
     * Logs a message inside given namespace.
     */
    logQuery(context: LogContext): void;
    /**
     * Sets active namespaces. Pass `true` to enable all logging.
     */
    setDebugMode(debugMode: boolean | LoggerNamespace[]): void;
    isEnabled(namespace: LoggerNamespace, context?: LogContext): boolean;
}
export type LoggerNamespace = 'query' | 'query-params' | 'schema' | 'discovery' | 'info' | 'deprecated';
export interface LogContext extends Dictionary {
    query?: string;
    label?: string;
    params?: unknown[];
    took?: number;
    results?: number;
    affected?: number;
    level?: 'info' | 'warning' | 'error';
    enabled?: boolean;
    debugMode?: LoggerNamespace[];
    connection?: {
        type?: string;
        name?: string;
    };
}
export interface LoggerOptions {
    writer: (message: string) => void;
    debugMode?: boolean | LoggerNamespace[];
    ignoreDeprecations?: boolean | string[];
    highlighter?: Highlighter;
    usesReplicas?: boolean;
}
/**
 * Logger options to modify format output and overrides, including a label and additional properties that can be accessed by custom loggers.
 *
 * Differs from {@apilink LoggerOptions} in terms of how they are used; this type is primarily a public type meant to be used within methods like `em.find()`.
 *
 * @example
 * await em.findOne(User, 1, { logger: { label: 'user middleware' } };
 * // [query] (user middleware) select * from user where id = 1;
 */
export type LoggingOptions = Pick<LogContext, 'label' | 'enabled' | 'debugMode'>;