18F/identity-idp

# frozen_string_literal: true

class PhoneNumberCapabilities
  def self.load_config
    YAML.load_file(
      Rails.root.join('config', 'country_dialing_codes.yml'),
    ).deep_merge(IdentityConfig.store.country_phone_number_overrides)
  end

  INTERNATIONAL_CODES = load_config.freeze
  ADDRESS_IDENTITY_PROOFING_SUPPORTED_COUNTRY_CODES =
    IdentityConfig.store.address_identity_proofing_supported_country_codes.freeze

  attr_reader :phone, :phone_confirmed

  def self.generate_translated_international_codes_data
    translated_intl_codes_data = Hash.new { |h, k| h[k] = {} }
    I18n.available_locales.each do |locale|
      INTERNATIONAL_CODES.each do |k, value|
        translated_intl_codes_data[locale][k] =
          value.merge('name' => I18n.t("countries.#{k.downcase}", locale: locale))
      end
    end
    translated_intl_codes_data
  end

  def self.translated_international_codes
    translated_intl_codes_data = if Rails.env.development?
                                   generate_translated_international_codes_data
                                 else
                                   TRANSLATED_INTL_CODES_DATA
                                 end

    translated_intl_codes_data[I18n.locale] if translated_intl_codes_data
  end

  TRANSLATED_INTL_CODES_DATA = generate_translated_international_codes_data.freeze

  def initialize(phone, phone_confirmed:)
    @phone = phone
    @phone_confirmed = phone_confirmed
  end

  # @param [Symbol] method
  def supports?(method)
    case method
    when :sms
      supports_sms?
    when :voice
      supports_voice?
    else
      raise "Unknown method=#{method}"
    end
  end

  # @param [Array<Symbol>] methods
  def supports_all?(methods)
    methods.all? { |method| supports?(method) }
  end

  def sms_only?
    supports_sms? && !supports_voice?
  end

  def supports_sms?
    return false if country_code_data.nil?

    supports_sms = country_code_data['supports_sms']

    supports_sms_unconfirmed = country_code_data.fetch(
      'supports_sms_unconfirmed',
      supports_sms,
    )

    supports_sms_unconfirmed || (
      supports_sms && phone_confirmed
    )
  end

  def supports_voice?
    return false if country_code_data.nil?

    supports_voice = country_code_data['supports_voice']
    supports_voice_unconfirmed = country_code_data.fetch(
      'supports_voice_unconfirmed',
      supports_voice,
    )

    supports_voice_unconfirmed || (
      supports_voice && phone_confirmed
    )
  end

  def unsupported_location
    country_code_data['name'] if country_code_data
  end

  private

  def country_code_data
    INTERNATIONAL_CODES[two_letter_country_code]
  end

  def two_letter_country_code
    parsed_phone.country
  end

  def parsed_phone
    @parsed_phone ||= Phonelib.parse(phone)
  end
end