using System;
using System.IO;
using System.Text.Json;
using System.Text.Json.Serialization;
using System.Threading.Tasks;
using StellaOps.Scanner.WebService.Contracts;

namespace StellaOps.Scanner.WebService.Tests;

public sealed class ReportSamplesTests
{
    private static readonly JsonSerializerOptions SerializerOptions = new(JsonSerializerDefaults.Web)
    {
        DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
        Converters = { new JsonStringEnumConverter() }
    };

    [Fact]
    public async Task ReportSampleEnvelope_RemainsCanonical()
    {
        var baseDirectory = AppContext.BaseDirectory;
        var repoRoot = Path.GetFullPath(Path.Combine(baseDirectory, "..", "..", "..", "..", ".."));
        var path = Path.Combine(repoRoot, "samples", "api", "reports", "report-sample.dsse.json");
        Assert.True(File.Exists(path), $"Sample file not found at {path}.");
        await using var stream = File.OpenRead(path);
        var response = await JsonSerializer.DeserializeAsync<ReportResponseDto>(stream, SerializerOptions);
        Assert.NotNull(response);
        Assert.NotNull(response!.Report);
        Assert.NotNull(response.Dsse);

        var reportBytes = JsonSerializer.SerializeToUtf8Bytes(response.Report, SerializerOptions);
        var expectedPayload = Convert.ToBase64String(reportBytes);
        Assert.Equal(expectedPayload, response.Dsse!.Payload);
    }
}