const parseSlug = require('parse-github-repo-url')

const SemanticReleaseError = require('@semantic-release/error')

module.exports = function ({pkg, options, env}) {
  let errors = []

  if (!pkg.name) {
    errors.push(new SemanticReleaseError(
      'No "name" found in package.json.',
      'ENOPKGNAME'
    ))
  }

  if (!pkg.repository || !pkg.repository.url) {
    errors.push(new SemanticReleaseError(
      'No "repository" found in package.json.',
      'ENOPKGREPO'
    ))
  } else if (!parseSlug(pkg.repository.url)) {
    errors.push(new SemanticReleaseError(
      'The "repository" field in the package.json is malformed.',
      'EMALFORMEDPKGREPO'
    ))
  }

  if (options.debug) return errors

  if (!options.githubToken) {
    errors.push(new SemanticReleaseError(
      'No github token specified.',
      'ENOGHTOKEN'
    ))
  }

  if (!(env.NPM_TOKEN || (env.NPM_OLD_TOKEN && env.NPM_EMAIL))) {
    errors.push(new SemanticReleaseError(
      'No npm token specified.',
      'ENONPMTOKEN'
    ))
  }

  return errors
}