import { pino, type DestinationStream, type Logger, type LoggerOptions } from 'pino';

export type ServerLogger = Logger;

export type ServerLogLevel = 'fatal' | 'error' | 'warn' | 'info' | 'debug' | 'trace' | 'silent';

export interface CreateLoggerOptions {
  level: ServerLogLevel;
  stream?: DestinationStream;
}

export function createServerLogger(opts: CreateLoggerOptions): ServerLogger {
  const base: LoggerOptions = {
    level: opts.level,
    base: { name: 'kimi-server-v2' },
    timestamp: pino.stdTimeFunctions.isoTime,
  };
  return opts.stream === undefined ? pino(base) : pino(base, opts.stream);
}