# For an example companion mocking service, see https://gitlab.com/gitlab-org/gitlab-mock-ci-service
class MockCiService < CiService
  ALLOWED_STATES = %w[failed canceled running pending success success_with_warnings skipped not_found].freeze

  prop_accessor :mock_service_url
  validates :mock_service_url, presence: true, url: true, if: :activated?

  def title
    'MockCI'
  end

  def description
    'Mock an external CI'
  end

  def self.to_param
    'mock_ci'
  end

  def fields
    [
      { type: 'text',
        name: 'mock_service_url',
        placeholder: 'http://localhost:4004' },
    ]
  end

  # Return complete url to build page
  #
  # Ex.
  #   http://jenkins.example.com:8888/job/test1/scm/bySHA1/12d65c
  #
  def build_page(sha, ref)
    url = [mock_service_url,
           "#{project.namespace.path}/#{project.path}/status/#{sha}"]

    URI.join(*url).to_s
  end

  # Return string with build status or :error symbol
  #
  # Allowed states: 'success', 'failed', 'running', 'pending', 'skipped'
  #
  #
  # Ex.
  #   @service.commit_status('13be4ac', 'master')
  #   # => 'success'
  #
  #   @service.commit_status('2abe4ac', 'dev')
  #   # => 'running'
  #
  #
  def commit_status(sha, ref)
    response = HTTParty.get(commit_status_path(sha), verify: false)
    read_commit_status(response)
  rescue Errno::ECONNREFUSED
    :error
  end

  def commit_status_path(sha)
    url = [mock_service_url,
           "#{project.namespace.path}/#{project.path}/status/#{sha}.json"]

    URI.join(*url).to_s
  end

  def read_commit_status(response)
    return :error unless response.code == 200 || response.code == 404

    status = if response.code == 404
               'pending'
             else
               response['status']
             end

    if status.present? && ALLOWED_STATES.include?(status)
      status
    else
      :error
    end
  end
end
