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export type LoggerBackend = {

info(msg: string, ...args: unknown[]): void

warn(msg: string, ...args: unknown[]): void

error(msg: string, ...args: unknown[]): void

debug?(msg: string, ...args: unknown[]): void

}

const NOOP_LOGGER: LoggerBackend = {

info() {},

warn() {},

error() {},

debug() {},

}

let _backend: LoggerBackend = NOOP_LOGGER

let _debug = false

export function initLogger(backend: LoggerBackend, debug: boolean): void {

_backend = backend

_debug = debug

}

export const log = {

info(msg: string, ...args: unknown[]): void {

_backend.info(`basic-memory: ${msg}`, ...args)

},

warn(msg: string, ...args: unknown[]): void {

_backend.warn(`basic-memory: ${msg}`, ...args)

},

error(msg: string, err?: unknown): void {

const detail =

err instanceof Error

? err.message

: err !== undefined && err !== ""

? String(err)

: ""

_backend.error(`basic-memory: ${msg}${detail ? ` — ${detail}` : ""}`)

},

debug(msg: string, ...args: unknown[]): void {

if (!_debug) return

const fn = _backend.debug ?? _backend.info

fn(`basic-memory [debug]: ${msg}`, ...args)

},

}