/**
 * Generate additional configuration files when used for packaging. The file can be configured with some global variables, so that it can be changed directly externally without repackaging
 */
import { GLOB_CONFIG_FILE_NAME, OUTPUT_DIR } from '../constant';
import fs, { writeFileSync } from 'fs-extra';
import chalk from 'chalk';

import { getRootPath, getEnvConfig } from '../utils';
import { getConfigFileName } from '../getConfigFileName';

import pkg from '../../package.json';

const stringToJSONParse = (string: string) => {
  try {
    return JSON.parse(string);
  } catch (error) {
    return string;
  }
};

export function parseEnv(env: Record<string, string>) {
  const res: Record<string, string> = {};

  Object.keys(env).forEach((key) => {
    try {
      const value = env[key];
      res[key] = stringToJSONParse(value);
    } catch (err) {
      // eslint-disable-next-line no-console
      console.log(`env variable ${key} can't serialization!`);
    }
  });

  return res;
}

function createConfig(
  {
    configName,
    config,
    configFileName = GLOB_CONFIG_FILE_NAME,
  }: { configName: string; config: any; configFileName?: string } = { configName: '', config: {} }
) {
  try {
    const windowConf = `window.${configName}`;
    // Ensure that the variable will not be modified
    const configStr = `${windowConf}=${JSON.stringify(parseEnv(config))};
      Object.freeze(${windowConf});
      Object.defineProperty(window, "${configName}", {
        configurable: false,
        writable: false,
      });
    `.replace(/\s/g, '');
    fs.mkdirp(getRootPath(OUTPUT_DIR));
    writeFileSync(getRootPath(`${OUTPUT_DIR}/${configFileName}`), configStr);

    // eslint-disable-next-line no-console
    console.log(chalk.cyan(`✨ [${pkg.name}]`) + ` - configuration file is build successfully:`);
    // eslint-disable-next-line no-console
    console.log(chalk.gray(OUTPUT_DIR + '/' + chalk.green(configFileName)) + '\n');
  } catch (error) {
    // eslint-disable-next-line no-console
    console.log(chalk.red('configuration file configuration file failed to package:\n' + error));
  }
}

export function runBuildConfig() {
  const config = getEnvConfig();
  const configFileName = getConfigFileName(config);
  createConfig({ config, configName: configFileName });
}