import { dirname, join } from "path";
import { mkdir, open, readFile } from "fs/promises";

export namespace OutputHandler {
  export const LogCachePath = join(process.cwd(), "cache", "log");
  export const ErrorLogPath = join(LogCachePath, "error.log");
  export function getErrorOutput(...args: any[]) {
    const timestamp = new Date().toISOString();

    const message = args
      .map((arg) => {
        if (arg instanceof Error) {
          return `${arg.name}: ${arg.message}\n${arg.stack}`;
        }
        if (typeof arg === "object") {
          return JSON.stringify(arg);
        }
        return String(arg);
      })
      .join(" ");

    return `[${timestamp}] ${message}`;
  }
  export async function errorLog(...args: any[]): Promise<void> {
    const output = getErrorOutput(...args);
    console.log(output);

    await mkdir(dirname(ErrorLogPath), { recursive: true });

    const fileHandle = await open(ErrorLogPath, "a");
    fileHandle.write(output + "\n");
    fileHandle.close();
  }
  export async function getErrorLog(): Promise<string> {
    return (await readFile(ErrorLogPath)).toString();
  }
}