class Epp::DomainsController < EppController
  def create
    @domain = Epp::EppDomain.new(domain_create_params)

    @domain.parse_and_attach_domain_dependencies(params[:parsed_frame])
    @domain.parse_and_attach_ds_data(params[:parsed_frame].css('extension create'))

    if @domain.errors.any? || !@domain.save
      handle_errors(@domain)
    else
      render_epp_response '/epp/domains/create'
    end
  end

  def info
    @domain = find_domain
    handle_errors(@domain) and return unless @domain
    render_epp_response '/epp/domains/info'
  end

  def check
    names = params[:parsed_frame].css('name').map(&:text)
    @domains = Epp::EppDomain.check_availability(names)
    render_epp_response '/epp/domains/check'
  end

  def renew
    @domain = find_domain

    handle_errors(@domain) and return unless @domain
    handle_errors(@domain) and return unless @domain.renew(
      params[:parsed_frame].css('curExpDate').text,
      params[:parsed_frame].css('period').text,
      params[:parsed_frame].css('period').first['unit']
    )

    render_epp_response '/epp/domains/renew'
  end

  # rubocop:disable Metrics/CyclomaticComplexity
  def update
    @domain = find_domain

    handle_errors(@domain) and return unless @domain

    @domain.parse_and_detach_domain_dependencies(params[:parsed_frame].css('rem'))
    @domain.parse_and_detach_ds_data(params[:parsed_frame].css('extension rem'))
    @domain.parse_and_attach_domain_dependencies(params[:parsed_frame].css('add'))
    @domain.parse_and_attach_ds_data(params[:parsed_frame].css('extension add'))
    @domain.parse_and_update_domain_dependencies(params[:parsed_frame].css('chg'))
    @domain.attach_legal_document(Epp::EppDomain.parse_legal_document_from_frame(params[:parsed_frame]))

    if @domain.errors.any? || !@domain.save
      handle_errors(@domain)
    else
      render_epp_response '/epp/domains/success'
    end
  end

  # rubocop: disable Metrics/PerceivedComplexity
  # rubocop: disable Metrics/MethodLength

  def transfer
    @domain = find_domain(secure: false)
    handle_errors(@domain) and return unless @domain
    handle_errors(@domain) and return unless @domain.authenticate(domain_transfer_params[:pw])

    if domain_transfer_params[:action] == 'query'
      if @domain.pending_transfer
        @domain_transfer = @domain.pending_transfer
      else
        @domain_transfer = @domain.query_transfer(domain_transfer_params, params[:parsed_frame])
        handle_errors(@domain) and return unless @domain_transfer
      end
    elsif domain_transfer_params[:action] == 'approve'
      if @domain.pending_transfer
        @domain_transfer = @domain.approve_transfer(domain_transfer_params, params[:parsed_frame])
        handle_errors(@domain) and return unless @domain_transfer
      else
        epp_errors << { code: '2303', msg: I18n.t('pending_transfer_was_not_found') }
        handle_errors(@domain) and return
      end
    elsif domain_transfer_params[:action] == 'reject'
      if @domain.pending_transfer
        @domain_transfer = @domain.reject_transfer(domain_transfer_params, params[:parsed_frame])
        handle_errors(@domain) and return unless @domain_transfer
      else
        epp_errors << { code: '2303', msg: I18n.t('pending_transfer_was_not_found') }
        handle_errors(@domain) and return
      end
    end

    render_epp_response '/epp/domains/transfer'
  end

  # rubocop: enable Metrics/MethodLength
  # rubocop: enable Metrics/CyclomaticComplexity
  # rubocop:disable Metrics/CyclomaticComplexity

  def delete
    @domain = find_domain

    handle_errors(@domain) and return unless @domain
    handle_errors(@domain) and return unless @domain.can_be_deleted?

    @domain.attach_legal_document(Epp::EppDomain.parse_legal_document_from_frame(params[:parsed_frame]))
    @domain.save(validate: false)

    handle_errors(@domain) and return unless @domain.destroy

    render_epp_response '/epp/domains/success'
  end
  # rubocop:enbale Metrics/CyclomaticComplexity

  private

  def validate_info
    @prefix = 'info > info >'
    requires('name')
  end

  def validate_check
    @prefix = 'check > check >'
    requires('name')
  end

  def validate_create
    @prefix = 'create > create >'
    requires 'name', 'ns', 'registrant', 'ns > hostAttr'

    @prefix = 'extension > create >'
    mutually_exclusive 'keyData', 'dsData'

    @prefix = nil
    requires 'extension > extdata > legalDocument'
  end

  def validate_renew
    @prefix = 'renew > renew >'
    requires 'name', 'curExpDate', 'period'
  end

  def validate_update
    if element_count('update > chg > registrant') > 0
      requires 'extension > extdata > legalDocument'
    end

    @prefix = 'update > update >'
    requires 'name'
  end

  ## TRANSFER
  def validate_transfer
    requires 'transfer > transfer'

    @prefix = 'transfer > transfer >'
    requires 'name'

    @prefix = nil
    requires_attribute 'transfer', 'op', values: %(approve, query, reject)

    requires 'extension > extdata > legalDocument'
  end

  ## DELETE
  def validate_delete
    requires 'extension > extdata > legalDocument'

    @prefix = 'delete > delete >'
    requires 'name'
  end

  def domain_create_params
    name = params[:parsed_frame].css('name').text
    period = params[:parsed_frame].css('period').text

    {
      name: name,
      registrar_id: current_user.registrar.try(:id),
      registered_at: Time.now,
      period: (period.to_i == 0) ? 1 : period.to_i,
      period_unit: Epp::EppDomain.parse_period_unit_from_frame(params[:parsed_frame]) || 'y'
    }
  end

  def domain_transfer_params
    res = {}
    res[:pw] = params[:parsed_frame].css('pw').first.try(:text)
    res[:action] = params[:parsed_frame].css('transfer').first[:op]
    res[:current_user] = current_user
    res
  end

  def find_domain(secure = { secure: true })
    domain_name = params[:parsed_frame].css('name').text.strip.downcase
    domain = Epp::EppDomain.find_by(name: domain_name)

    unless domain
      epp_errors << {
        code: '2303',
        msg: I18n.t('errors.messages.epp_domain_not_found'),
        value: { obj: 'name', val: domain_name }
      }
      return nil
    end

    return domain if domain.auth_info == params[:parsed_frame].css('authInfo pw').text

    if (domain.registrar != current_api_user.registrar) && secure[:secure] == true
      epp_errors << {
        code: '2302',
        msg: I18n.t('errors.messages.domain_exists_but_belongs_to_other_registrar'),
        value: { obj: 'name', val: params[:parsed_frame].css('name').text.strip.downcase }
      }
      return nil
    end

    domain
  end
end