import { FException } from "../exception/f_exception.js";
import { FLoggerLevel } from "./f_logger_level.js";
import { FExecutionContext } from "../execution_context/f_execution_context.js";
import { FLoggerLabelValue } from "./f_logger_labels.js";
export interface LoggerFactory {
    (loggerName: string): FLogger;
}
export interface FLoggerMessageFactory {
    (): string;
}
export declare abstract class FLogger {
    private static _loggerFactory;
    private static get loggerFactory();
    static setLoggerFactory(factory: LoggerFactory): void;
    /**
     * Factory constructor
     */
    static create(loggerName: string): FLogger;
    abstract get isTraceEnabled(): boolean;
    abstract get isDebugEnabled(): boolean;
    abstract get isInfoEnabled(): boolean;
    abstract get isWarnEnabled(): boolean;
    abstract get isErrorEnabled(): boolean;
    abstract get isFatalEnabled(): boolean;
    abstract get name(): string | null;
    abstract trace(executionContext: FExecutionContext, message: string, ex?: FException): void;
    abstract trace(executionContext: FExecutionContext, messageFactory: FLoggerMessageFactory, ex?: FException): void;
    abstract debug(executionContext: FExecutionContext, message: string, ex?: FException): void;
    abstract debug(executionContext: FExecutionContext, messageFactory: FLoggerMessageFactory, ex?: FException): void;
    abstract info(executionContext: FExecutionContext, message: string): void;
    abstract info(executionContext: FExecutionContext, messageFactory: FLoggerMessageFactory): void;
    abstract warn(executionContext: FExecutionContext, message: string): void;
    abstract warn(executionContext: FExecutionContext, messageFactory: FLoggerMessageFactory): void;
    abstract error(executionContext: FExecutionContext, message: string): void;
    abstract error(executionContext: FExecutionContext, messageFactory: FLoggerMessageFactory): void;
    abstract fatal(executionContext: FExecutionContext, message: string): void;
    abstract fatal(executionContext: FExecutionContext, messageFactory: FLoggerMessageFactory): void;
    abstract log(executionContextOrLabels: FExecutionContext | ReadonlyArray<FLoggerLabelValue>, level: FLoggerLevel, messageOrMessageFactory: string | FLoggerMessageFactory, ex?: FException): void;
}
export declare abstract class FLoggerBase extends FLogger {
    get isTraceEnabled(): boolean;
    get isDebugEnabled(): boolean;
    get isInfoEnabled(): boolean;
    get isWarnEnabled(): boolean;
    get isErrorEnabled(): boolean;
    get isFatalEnabled(): boolean;
    get name(): string;
    trace(variant: FExecutionContext | ReadonlyArray<FLoggerLabelValue>, messageOrMessageFactory: string | FLoggerMessageFactory, ex?: FException): void;
    debug(variant: FExecutionContext | ReadonlyArray<FLoggerLabelValue>, messageOrMessageFactory: string | FLoggerMessageFactory, ex?: FException): void;
    info(variant: FExecutionContext | ReadonlyArray<FLoggerLabelValue>, messageOrMessageFactory: string | FLoggerMessageFactory): void;
    warn(variant: FExecutionContext | ReadonlyArray<FLoggerLabelValue>, messageOrMessageFactory: string | FLoggerMessageFactory): void;
    error(variant: FExecutionContext | ReadonlyArray<FLoggerLabelValue>, messageOrMessageFactory: string | FLoggerMessageFactory): void;
    fatal(variant: FExecutionContext | ReadonlyArray<FLoggerLabelValue>, messageOrMessageFactory: string | FLoggerMessageFactory): void;
    log(executionContextOrLabels: FExecutionContext | ReadonlyArray<FLoggerLabelValue>, level: FLoggerLevel, messageOrMessageFactory: string | FLoggerMessageFactory, ex?: FException): void;
    protected constructor(loggerName: string);
    protected abstract isLevelEnabled(level: FLoggerLevel): boolean;
    /**
     * Unconditionally(without check logLevel settings) write message to logger output.
     *
     * Override this method to implement custom logger.
     */
    protected abstract writeToOutput(level: FLoggerLevel, labelValues: ReadonlyArray<FLoggerLabelValue>, message: string, ex?: FException): void;
    private readonly _name;
    static _resolveLoggerLabels(variant: FExecutionContext | ReadonlyArray<FLoggerLabelValue>): ReadonlyArray<FLoggerLabelValue>;
    static _resolveMessage(messageOrMessageFactory: string | FLoggerMessageFactory): string;
    private static readonly _emptyLabelValues;
}
export declare abstract class FLoggerBaseWithLevel extends FLoggerBase {
    static buildLoggerLevelsMap(level: FLoggerLevel | null): Map<FLoggerLevel, boolean>;
    constructor(loggerName: string, level: FLoggerLevel);
    protected isLevelEnabled(level: FLoggerLevel): boolean;
    private readonly levels;
}
export declare abstract class FLoggerConsole extends FLoggerBaseWithLevel {
    /**
     * Factory constructor
     */
    static create(loggerName: string, opts?: {
        readonly level?: FLoggerLevel;
        readonly format?: FLoggerConsole.Format;
        readonly output?: "stdout" | "stderr";
    }): FLogger;
}
export declare namespace FLoggerConsole {
    type Format = "text" | "json";
}