module FFaker::PhoneNumberJA

def home_phone_number
  disit = rand(1..4)
  FFaker.numerify("#{JAPAN_PREFIX}#{home_phone_number_format(disit)}")
end

def home_phone_number_format(disit)
  prefix = home_phone_prefix(disit)
  select_home_phone_format(disit) % prefix
end

def home_phone_prefix(disit = nil)
  case disit
  when 1 then fetch_sample(ONE_DISIT_AREA_CODES)
  when 2 then fetch_sample(TWO_DISIT_AREA_CODES)
  when 3 then fetch_sample(THREE_DISIT_AREA_CODES)
  when 4 then fetch_sample(FOUR_DISIT_AREA_CODES)
  end
end

def international_home_phone_number
  disit = rand(1..4)
  FFaker.numerify("#{JAPAN_COUNTRY_CODE} #{home_phone_number_format(disit)}")
end

def international_mobile_phone_number
  FFaker.numerify("#{JAPAN_COUNTRY_CODE} #{mobile_phone_number_format}")
end

def international_phone_number
  case rand(0..1)
  when 0 then international_mobile_phone_number
  when 1 then international_home_phone_number
  end
end

def mobile_phone_number
  FFaker.numerify("#{JAPAN_PREFIX}#{mobile_phone_number_format}")
end

def mobile_phone_number_format
  prefix = mobile_prefix
  MOBILE_NUMBER_FORMAT % prefix
end

def mobile_prefix
  fetch_sample(MOBILE_PHONE_PREFIXES)
end

def phone_number
  case rand(0..1)
  when 0 then home_phone_number
  when 1 then mobile_phone_number
  end
end

def select_home_phone_format(disit)
  case disit
  when 1 then ONE_DISIT_FORMAT
  when 2 then TWO_DISIT_FORMAT
  when 3 then THREE_DISIT_FORMAT
  when 4 then FOUR_DISIT_FORMAT
  end
end