import { pino, type Logger } from "pino";

const VALID_LEVELS = new Set(["trace", "debug", "info", "warn", "error", "fatal", "silent"]);

function resolveLevel(input: string | undefined): string {
  if (!input) {
    return "info";
  }

  const normalized = input.toLowerCase();
  return VALID_LEVELS.has(normalized) ? normalized : "info";
}

export function createLogger(level: string | undefined): Logger {
  return pino({
    level: resolveLevel(level),
    base: { service: "usdt-transfer" },
    timestamp: pino.stdTimeFunctions.isoTime
  });
}