Generate Random Phone Numbers in Ruby

require "securerandom"

# Generate random US phone number (xxx) xxx-xxxx
def random_us_phone_number
  area_code = rand(200..999)
  exchange = rand(200..999)
  line_number = rand(1000..9999)
  format("(%03d) %03d-%04d", area_code, exchange, line_number)
end

# Generate random phone number with country code
def random_international_phone(country_code = "+1")
  area_code = rand(200..999)
  exchange = rand(200..999)
  line_number = rand(1000..9999)
  format("%s (%03d) %03d-%04d", country_code, area_code, exchange, line_number)
end

# Generate phone number without formatting
def random_phone_digits(length = 10)
  length.times.map { rand(0..9) }.join
end

# Validate US phone number format
def valid_us_phone?(phone)
  phone.match?(/^\(\d{3}\) \d{3}-\d{4}$/)
end

# Generate multiple phone numbers
def generate_phone_numbers(count = 10)
  Array.new(count) { random_us_phone_number }
end

# Using Faker gem (gem install faker)
# require "faker"
# phone = Faker::PhoneNumber.phone_number         # (555) 123-4567
# phone_e164 = Faker::PhoneNumber.phone_number_with_country_code  # +1 555-123-4567
# cell = Faker::PhoneNumber.cell_phone            # 555-123-4567

puts "US Phone: #{random_us_phone_number}"
puts "International: #{random_international_phone(\"+44\")}"
puts "Digits only: #{random_phone_digits(10)}"
puts "Valid: #{valid_us_phone?(\"(555) 123-4567\")}"
puts "Batch: #{generate_phone_numbers(3).join(\", \")}\"