using System.Globalization;
using ErsatzTV.Core.Domain;
using ErsatzTV.ViewModels;
using FluentValidation;

namespace ErsatzTV.Validators;

public class ChannelEditViewModelValidator : AbstractValidator<ChannelEditViewModel>
{
    public ChannelEditViewModelValidator()
    {
        RuleFor(x => x.Number).Matches(Channel.NumberValidator)
            .WithMessage("Invalid channel number; two decimals are allowed for subchannels");

        RuleFor(x => x.Name).NotEmpty();
        RuleFor(x => x.Group).NotEmpty();
        RuleFor(x => x.FFmpegProfileId).GreaterThan(0);

        RuleFor(x => x.PreferredAudioLanguageCode)
            .Must(
                languageCode => CultureInfo.GetCultures(CultureTypes.NeutralCultures)
                    .Any(
                        ci => string.Equals(
                            ci.ThreeLetterISOLanguageName,
                            languageCode,
                            StringComparison.OrdinalIgnoreCase)))
            .When(vm => !string.IsNullOrWhiteSpace(vm.PreferredAudioLanguageCode))
            .WithMessage("Preferred audio language code is invalid");
    }
}