using System.Text;
using SGU.AuthBroker.Core.Profiles;
using Xunit;

namespace SGU.AuthBroker.Core.Tests;

public sealed class SguHtmlDecoderTests
{
    [Fact]
    public void DecodesWindows1252WhenSguOmitsACharset()
    {
        Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
        byte[] bytes = Encoding.GetEncoding(1252).GetBytes(
            "<span>ANALISTA DE INMERSIÓN — FACULTAD DE INGENIERÍA</span>");

        string decoded = SguHtmlDecoder.Decode(bytes);

        Assert.Contains("INMERSIÓN", decoded, StringComparison.Ordinal);
        Assert.Contains("INGENIERÍA", decoded, StringComparison.Ordinal);
        Assert.Contains('—', decoded);
        Assert.DoesNotContain('\uFFFD', decoded);
    }

    [Fact]
    public void FallsBackWhenTheDeclaredUtf8CharsetIsIncorrect()
    {
        Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
        byte[] bytes = Encoding.GetEncoding(1252).GetBytes("JESÚS GONZÁLEZ");

        string decoded = SguHtmlDecoder.Decode(bytes, "utf-8");

        Assert.Equal("JESÚS GONZÁLEZ", decoded);
    }

    [Fact]
    public void HonorsValidUtf8WithoutADeclaration()
    {
        byte[] bytes = Encoding.UTF8.GetBytes("María del Carmen 🔐");

        string decoded = SguHtmlDecoder.Decode(bytes);

        Assert.Equal("María del Carmen 🔐", decoded);
    }
}