# frozen_string_literal: true

module FFaker
  module NameCS
    include FFaker::Name

    extend ModuleUtils
    extend self

    FIRST_NAMES = {
      female: FEMALE_FIRST_NAMES,
      male: MALE_FIRST_NAMES
    }.freeze
    LAST_NAMES = {
      female: FEMALE_LAST_NAMES,
      male: MALE_LAST_NAMES
    }.freeze
    SUFFIXES = %w[Ph.D. Th.D. DSc.].freeze
    GENDERS = %i[male female random].freeze # :nodoc:

    # All names generated inside the block will have the same sex.
    # Can be called with explicit sex which will affect
    # all calls inside thee block:
    #
    #   FFaker::NameCS.with_same_sex(:female)
    #     person.last_name  = FFaker::NameCS.last_name
    #     person.first_name = FFaker::NameCS.first_name
    #   end
    #
    #   person.last_name    # => "Nováková"
    #   person.first_name   # => "Jana"
    def with_same_sex(sex = :random)
      @fixed_sex = sex == :random ? GENDERS[rand(0..1)] : sex
      yield
    ensure
      @fixed_sex = nil
    end

    # Generates random full name which can contain prefix and suffix
    # Can be called with explicit sex (:male, :female), like:
    #
    #   FFaker::NameCS.name(:male)
    #
    # for_sex defaults to :random.
    def name(for_sex = :random)
      with_same_sex(for_sex) do
        case rand(0..9)
        when 0     then "#{prefix} #{first_name} #{last_name} #{suffix}"
        when 1..2  then "#{prefix} #{first_name} #{last_name}"
        else "#{first_name} #{last_name}"
        end
      end
    end

    # Generates random last name
    # for_sex can be :male, :female. Defaults to :random
    def last_name(for_sex = :random)
      fetch_sample(LAST_NAMES[select_sex(for_sex)])
    end

    # Generates random first name
    # for_sex can be :male, :female. Defaults to :random
    def first_name(for_sex = :random)
      fetch_sample(FIRST_NAMES[select_sex(for_sex)])
    end

    # Generates random name prefix, an academic degree
    def prefix
      fetch_sample(PREFIXES)
    end

    # Generates random name suffix, an academic degree
    def suffix
      fetch_sample(SUFFIXES)
    end

    private

    def select_sex(sex) # :nodoc:
      @fixed_sex ||= nil
      given_sex = @fixed_sex || sex
      raise ArgumentError, "Unknown sex #{given_sex}" unless GENDERS.include?(given_sex)

      given_sex == :random ? GENDERS[rand(0..1)] : given_sex
    end
  end
end