# == Schema Information
#
# Table name: account_saml_settings
#
#  id            :bigint           not null, primary key
#  certificate   :text
#  role_mappings :json
#  sso_url       :string
#  created_at    :datetime         not null
#  updated_at    :datetime         not null
#  account_id    :bigint           not null
#  idp_entity_id :string
#  sp_entity_id  :string
#
# Indexes
#
#  index_account_saml_settings_on_account_id  (account_id)
#
class AccountSamlSettings < ApplicationRecord
  belongs_to :account

  validates :account_id, presence: true
  validates :sso_url, presence: true
  validates :certificate, presence: true
  validates :idp_entity_id, presence: true
  validate :certificate_must_be_valid_x509

  before_validation :set_sp_entity_id, if: :sp_entity_id_needs_generation?

  after_create_commit :update_account_users_provider
  after_destroy_commit :reset_account_users_provider

  def saml_enabled?
    sso_url.present? && certificate.present?
  end

  def certificate_fingerprint
    return nil if certificate.blank?

    begin
      cert = OpenSSL::X509::Certificate.new(certificate)
      OpenSSL::Digest::SHA1.new(cert.to_der).hexdigest
                           .upcase.gsub(/(.{2})(?=.)/, '\1:')
    rescue OpenSSL::X509::CertificateError
      nil
    end
  end

  private

  def set_sp_entity_id
    base_url = GlobalConfigService.load('FRONTEND_URL', 'http://localhost:3000')
    self.sp_entity_id = "#{base_url}/saml/sp/#{account_id}"
  end

  def sp_entity_id_needs_generation?
    sp_entity_id.blank?
  end

  def installation_name
    GlobalConfigService.load('INSTALLATION_NAME', 'Chatwoot')
  end

  def update_account_users_provider
    Saml::UpdateAccountUsersProviderJob.perform_later(account_id, 'saml')
  end

  def reset_account_users_provider
    Saml::UpdateAccountUsersProviderJob.perform_later(account_id, 'email')
  end

  def certificate_must_be_valid_x509
    return if certificate.blank?

    OpenSSL::X509::Certificate.new(certificate)
  rescue OpenSSL::X509::CertificateError
    errors.add(:certificate, I18n.t('errors.account_saml_settings.invalid_certificate'))
  end
end