using System.Text.Json;

internal sealed record AppSettings(int IntervalSeconds, string[] DefaultPhoneNumbers);

internal sealed record UpdateSettingsRequest(int IntervalSeconds, string[] DefaultPhoneNumbers);

internal static class PhoneNumbersJson
{
    private static readonly JsonSerializerOptions Options = new() { WriteIndented = false };

    public static string[] Deserialize(string? json)
    {
        if (string.IsNullOrWhiteSpace(json))
        {
            return [];
        }

        return JsonSerializer.Deserialize<string[]>(json, Options) ?? [];
    }

    public static string Serialize(string[] phoneNumbers) => JsonSerializer.Serialize(phoneNumbers, Options);
}