import { env } from "cloudflare:workers";

type LogLevel = "debug" | "info" | "warn" | "error";

const LOG_LEVELS: Record<LogLevel, number> = {
  debug: 0,
  info: 1,
  warn: 2,
  error: 3,
} as const;

function isLogLevel(level: string): level is LogLevel {
  return (
    level === "debug" ||
    level === "info" ||
    level === "warn" ||
    level === "error"
  );
}

export function createLogger(namespace?: string, fullRepoName?: string) {
  const configLevel = env.LOG_LEVEL ?? "info";
  const currentLevel = isLogLevel(configLevel) ? configLevel : "info";
  const minLevel = LOG_LEVELS[currentLevel];

  const argsStr = [fullRepoName, namespace]
    .filter(Boolean)
    .map((s) => `[${s}]`)
    .join(" ");

  return {
    debug: (...args: unknown[]) => {
      if (LOG_LEVELS.debug >= minLevel) {
        console.debug(`[DEBUG] ${argsStr}`, ...args);
      }
    },
    info: (...args: unknown[]) => {
      if (LOG_LEVELS.info >= minLevel) {
        console.info(`[INFO] ${argsStr}`, ...args);
      }
    },
    warn: (...args: unknown[]) => {
      if (LOG_LEVELS.warn >= minLevel) {
        console.warn(`[WARN] ${argsStr}`, ...args);
      }
    },
    error: (...args: unknown[]) => {
      if (LOG_LEVELS.error >= minLevel) {
        console.error(`[ERROR] ${argsStr}`, ...args);
      }
    },
  };
}