class ServiceProvidersController < ApplicationController
  def show
    entity_id = service_provider_url(id: params[:id])
    xml = Metadatum.metadata_for(entity_id).to_xml
    if params[:view].present?
      render xml: xml
    else
      render xml: xml, content_type: "application/samlmetadata+xml"
    end
  end

  def new
  end

  def create
    configuration = Saml::Kit::Configuration.new do |config|
      config.entity_id = service_provider_url(id: SecureRandom.uuid)
      params[:signing_certificates].to_i.times do |n|
        config.generate_key_pair_for(use: :signing)
      end
      params[:encryption_certificates].to_i.times do |n|
        config.generate_key_pair_for(use: :encryption)
      end
    end
    metadata = Saml::Kit::ServiceProviderMetadata.build(configuration: configuration) do |builder|
      builder.embed_signature = false
      builder.add_assertion_consumer_service(consume_url, binding: :http_post)
      builder.add_single_logout_service(logout_url, binding: :http_post)
    end
    ActiveRecord::Base.transaction do
      metadatum = Metadatum.create!(
        entity_id: metadata.entity_id,
        metadata: metadata.to_xml
      )
      configuration.key_pairs.each do |key_pair|
        metadatum.certificates.create!(
          pem: key_pair.certificate.x509.to_pem,
          private_key_pem: key_pair.private_key.to_pem,
          use: key_pair.certificate.use,
        )
      end
    end
    redirect_to providers_path
  end

  def destroy
    Metadatum.find(params[:id]).destroy!
    redirect_to providers_path
  end
end