import { Config } from '../config';
import colors from 'colors';

export function validateConfigs(configs: Config[]) {
  const errors: string[] = [];

  if (configs.length === 0) errors.push('config array is empty');

  configs.forEach((config, i) => {
    const whichConfig = configs.length === 1 ? 'the config' : `config #${i + 1}`;

    if (!config.endpoint && !config.schema)
      errors.push(`you didn't provide either \`endpoint\`, \`schema\` or \`fetcher\` option in ${whichConfig}`);

    if ([config.endpoint, config.schema].filter((i) => i).length > 1)
      errors.push(
        `you provided two or more conflicting options in ${whichConfig}, only one of either \`endpoint\`, \`schema\` or \`fetcher\` is allowed`,
      );

    if (!config.output) errors.push(`you didn't provide an \`output\` option in ${whichConfig}`);
  });

  errors.forEach((error) => console.log(colors.red(`Error: ${error}`)));

  return errors.length === 0;
}