import { isPlainObject } from './is';
import { MAIN_ENTRY_NAME } from './constants';

export const getEntryOptions = <T>(
  name: string,
  baseOptions?: T,
  optionsByEntries?: Record<string, T>,
  packageName?: string,
) => {
  if (optionsByEntries) {
    let optionsByEntry = getOptionsByEntryName(name, optionsByEntries);

    // compatible with main entry using packageName as the key
    if (
      optionsByEntry === undefined &&
      name === MAIN_ENTRY_NAME &&
      packageName
    ) {
      optionsByEntry = getOptionsByEntryName(packageName, optionsByEntries);
    }

    // eslint-disable-next-line no-nested-ternary
    return optionsByEntry !== undefined
      ? isPlainObject(optionsByEntry) && isPlainObject(baseOptions)
        ? { ...baseOptions, ...optionsByEntry }
        : optionsByEntry
      : baseOptions;
  } else {
    return baseOptions;
  }
};

const getOptionsByEntryName = <T>(
  name: string,
  optionsByEntries: Record<string, T>,
) =>
  optionsByEntries.hasOwnProperty(name) ? optionsByEntries[name] : undefined;