using StellaOps.AirGap.Importer.Validation;

namespace StellaOps.AirGap.Importer.Tests;

public class TufMetadataValidatorTests
{
    [Fact]
    public void RejectsInvalidJson()
    {
        var validator = new TufMetadataValidator();
        var result = validator.Validate("{}", "{}", "{}");
        Assert.False(result.IsValid);
    }

    [Fact]
    public void AcceptsConsistentSnapshotHash()
    {
        var validator = new TufMetadataValidator();
        var root = "{\"version\":1,\"expiresUtc\":\"2030-01-01T00:00:00Z\"}";
        var snapshot = "{\"version\":1,\"expiresUtc\":\"2030-01-01T00:00:00Z\",\"meta\":{\"snapshot\":{\"hashes\":{\"sha256\":\"abc\"}}}}";
        var timestamp = "{\"version\":1,\"expiresUtc\":\"2030-01-01T00:00:00Z\",\"snapshot\":{\"meta\":{\"hashes\":{\"sha256\":\"abc\"}}}}";

        var result = validator.Validate(root, snapshot, timestamp);

        Assert.True(result.IsValid);
        Assert.Equal("tuf-metadata-valid", result.Reason);
    }

    [Fact]
    public void DetectsHashMismatch()
    {
        var validator = new TufMetadataValidator();
        var root = "{\"version\":1,\"expiresUtc\":\"2030-01-01T00:00:00Z\"}";
        var snapshot = "{\"version\":1,\"expiresUtc\":\"2030-01-01T00:00:00Z\",\"meta\":{\"snapshot\":{\"hashes\":{\"sha256\":\"abc\"}}}}";
        var timestamp = "{\"version\":1,\"expiresUtc\":\"2030-01-01T00:00:00Z\",\"snapshot\":{\"meta\":{\"hashes\":{\"sha256\":\"def\"}}}}";

        var result = validator.Validate(root, snapshot, timestamp);

        Assert.False(result.IsValid);
        Assert.Equal("tuf-snapshot-hash-mismatch", result.Reason);
    }
}