using StellaOps.AirGap.Time.Models;
using StellaOps.AirGap.Time.Parsing;

namespace StellaOps.AirGap.Time.Tests;

public class TimeTokenParserTests
{
    [Fact]
    public void EmptyTokenFails()
    {
        var parser = new TimeTokenParser();
        var result = parser.TryParse(Array.Empty<byte>(), TimeTokenFormat.Roughtime, out var anchor);

        Assert.False(result.IsValid);
        Assert.Equal("token-empty", result.Reason);
        Assert.Equal(TimeAnchor.Unknown, anchor);
    }

    [Fact]
    public void RoughtimeTokenProducesDigest()
    {
        var parser = new TimeTokenParser();
        var token = new byte[] { 0x01, 0x02, 0x03 };

        var result = parser.TryParse(token, TimeTokenFormat.Roughtime, out var anchor);

        Assert.True(result.IsValid);
        Assert.Equal("Roughtime", anchor.Format);
        Assert.Equal("roughtime-token", anchor.Source);
        Assert.Equal("structure-stubbed", result.Reason);
        Assert.Matches("^[0-9a-f]{64}$", anchor.TokenDigest);
        Assert.NotEqual(DateTimeOffset.UnixEpoch, anchor.AnchorTime); // deterministic derivation
    }
}