import chalk from 'chalk'
import { Config } from '../config'

export const validateConfigs = (configs: Config[]) => {
  const errors = []

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

    if ([config.endpoint, config.schema, config.fetcher].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(chalk.red(`Error: ${error}`)))

  return errors.length === 0
}