using System;

using PhoneNumbers;

​

public class Program

{

    private static readonly PhoneNumberUtil _phoneNumberUtil = PhoneNumberUtil.GetInstance();

    private record TestCase(string RegionCode, PhoneNumberType Type, string Value);

    public static void Main()

    {

        Console.WriteLine($"TEST CASES");

        var testCases = new TestCase[]

        {

            new("AU", PhoneNumberType.FIXED_LINE, "0755123456"),

            new("AU", PhoneNumberType.MOBILE, "0434111222"),

            new("NZ", PhoneNumberType.FIXED_LINE, "0755123456"),

            new("NZ", PhoneNumberType.MOBILE, "0434111222"),

        };

        foreach (var testCase in testCases)

        {

            var isValid = IsValid(testCase);

            Console.WriteLine($"{testCase}");

            Console.WriteLine($"Is valid? {isValid}");

            Console.WriteLine($"");

        }

        Console.WriteLine($"");

        Console.WriteLine($"");

        Console.WriteLine($"EXAMPLE NUMBERS");

        var regionCodes = new[]

        {

            "AU",

            "NZ"

        };

        foreach (var regionCode in regionCodes)

        {

            Console.WriteLine($"-----------------------------------");

            Console.WriteLine($"{regionCode}");

            Console.WriteLine($"-----------------------------------");

            WriteRandomPhoneNumbersForRegion(regionCode);

        }

    }

​

    private static void WriteRandomPhoneNumbersForRegion(string regionCode)

    {

        var types = new[]

        {

            PhoneNumberType.FIXED_LINE,

            PhoneNumberType.MOBILE

        };

        foreach (var type in Enum.GetValues<PhoneNumberType>())

        {

            Console.WriteLine($"{type} number ");

            try

            {

                WriteRandomPhoneNumber(regionCode, type);

            }

            catch

            {

                Console.WriteLine("-- unable to generate --");

            }

​

            Console.WriteLine("");

        }

​

        Console.WriteLine("");

    }

​

    private static void WriteRandomPhoneNumber(string regionCode, PhoneNumberType type)

    {

        var phoneNumber = _phoneNumberUtil.GetExampleNumberForType(regionCode, type);

        Console.WriteLine(_phoneNumberUtil.Format(phoneNumber, PhoneNumberFormat.NATIONAL));

    }

​

    private static bool IsValid(TestCase testCase)

    {

        PhoneNumber phoneNumber;

        try

        {

            phoneNumber = _phoneNumberUtil.Parse(testCase.Value, testCase.RegionCode);

        }

        catch

        {

            return false;

        }

​

        if (_phoneNumberUtil.GetRegionCodeForNumber(phoneNumber) != testCase.RegionCode)

        {

            return false;

        }

​

        if (_phoneNumberUtil.GetNumberType(phoneNumber) != testCase.Type)

        {

            return false;

        }

​

        return _phoneNumberUtil.IsValidNumber(phoneNumber);

    }

}