import { FlowfulError } from './error';

export const MODE_DEV = 'development';
export const MODE_PROD = 'production';

export type MODE = typeof MODE_DEV | typeof MODE_PROD;

let mode: MODE = MODE_PROD;

if (typeof process !== 'undefined' && process.env && process.env.NODE_ENV && process.env.NODE_ENV !== 'production') {
  mode = MODE_DEV;
}

export function checkMode(mode: MODE, functionName: string) {
  if (mode !== MODE_PROD && mode !== MODE_DEV) {
    throw new FlowfulError(
      `[Flowful][${functionName}] Invalid mode: "${mode}". The mode must be either "${MODE_PROD}" or "${MODE_DEV}".`,
      { mode }
    );
  }
  return mode;
}

export function setGlobalMode(newMode: MODE) {
  mode = checkMode(newMode, 'setGlobalMode');
}

export function getGlobalMode() {
  return mode;
}