class Officing::Residence
  include ActiveModel::Model
  include ActiveModel::Dates
  include ActiveModel::Validations::Callbacks

  attr_accessor :user, :officer, :document_number, :document_type, :year_of_birth,
                :date_of_birth, :postal_code

  before_validation :retrieve_census_data

  validates :document_number, presence: true
  validates :document_type, presence: true
  validates :date_of_birth, presence: true, if: -> { Setting.force_presence_date_of_birth? }
  validates :postal_code, presence: true, if: -> { Setting.force_presence_postal_code? }
  validates :year_of_birth, presence: true, unless: -> { Setting.force_presence_date_of_birth? }

  validate :allowed_age
  validate :local_residence

  def initialize(attrs = {})
    self.date_of_birth = parse_date("date_of_birth", attrs)
    attrs = remove_date("date_of_birth", attrs)
    super
    clean_document_number
  end

  def save
    return false unless valid?

    if user_exists?
      self.user = find_user_by_document
      user.update!(verified_at: Time.current)
    else
      user_params = {
        document_number: document_number,
        document_type: document_type,
        geozone: geozone,
        date_of_birth: response_date_of_birth.in_time_zone.to_datetime,
        gender: gender,
        residence_verified_at: Time.current,
        verified_at: Time.current,
        erased_at: Time.current,
        password: random_password,
        terms_of_service: "1",
        email: nil
      }
      self.user = User.create!(user_params)
    end
  end

  def save!
    validate! && save
  end

  def store_failed_census_call
    FailedCensusCall.create(
      user: user,
      document_number: document_number,
      document_type: document_type,
      date_of_birth: date_of_birth,
      postal_code: postal_code,
      year_of_birth: year_of_birth,
      poll_officer: officer
    )
  end

  def user_exists?
    find_user_by_document.present?
  end

  def find_user_by_document
    User.find_by(document_number: document_number, document_type: document_type)
  end

  def local_residence
    return if errors.any?

    unless residency_valid?
      store_failed_census_call
      errors.add(:local_residence, false)
    end
  end

  def allowed_age
    return if errors[:year_of_birth].any?
    return unless @census_api_response.valid?

    unless allowed_age?
      errors.add(:year_of_birth, I18n.t("verification.residence.new.error_not_allowed_age"))
    end
  end

  def allowed_age?
    Age.in_years(response_date_of_birth) >= User.minimum_required_age
  end

  def geozone
    Geozone.find_by(census_code: district_code)
  end

  def district_code
    @census_api_response.district_code
  end

  def gender
    @census_api_response.gender
  end

  def response_date_of_birth
    @census_api_response.date_of_birth
  end

  private

    def retrieve_census_data
      @census_api_response = CensusCaller.new.call(document_type,
                                                   document_number,
                                                   date_of_birth,
                                                   postal_code)
    end

    def residency_valid?
      @census_api_response.valid? && valid_year_of_birth?
    end

    def valid_year_of_birth?
      return true if Setting.force_presence_date_of_birth?

      @census_api_response.date_of_birth.year.to_s == year_of_birth.to_s
    end

    def clean_document_number
      self.document_number = document_number.gsub(/[^a-z0-9]+/i, "").upcase if document_number.present?
    end

    def random_password
      (0...20).map { ("a".."z").to_a[rand(26)] }.join
    end
end