import { combine } from './combine';
import { LogInfo } from '../Logger';

type FormatFnOptions = Record<string, unknown>;

type FormatFn = (info: LogInfo, opts?: FormatFnOptions) => LogInfo | boolean;

export abstract class Format {
  protected readonly opts: FormatFnOptions;

  constructor(opts) {
    this.opts = opts;
  }

  abstract transform(info: LogInfo): LogInfo | boolean;
}

export const format = (fn: FormatFn): (opts?: FormatFnOptions) => Format => {
  class Factory extends Format {
    transform(info: LogInfo) {
      return fn(info, this.opts);
    }
  }

  return (opts?: FormatFnOptions) => new Factory(opts);
};

format.combine = combine;