// -----------------------------------------------------------------------------
// BaselineEndpointsTests.cs
// Sprint: SPRINT_4200_0002_0006_delta_compare_api
// Description: Integration tests for baseline selection endpoints.
// -----------------------------------------------------------------------------

using System.Net;
using System.Net.Http.Json;
using System.Text.Json;
using StellaOps.Scanner.WebService.Contracts;

namespace StellaOps.Scanner.WebService.Tests;

/// <summary>
/// Integration tests for baseline selection endpoints.
/// </summary>
public sealed class BaselineEndpointsTests
{
    private static readonly JsonSerializerOptions SerializerOptions = new(JsonSerializerDefaults.Web);

    [Fact]
    public async Task GetRecommendations_ValidDigest_ReturnsRecommendations()
    {
        using var factory = new ScannerApplicationFactory();
        using var client = factory.CreateClient();

        var response = await client.GetAsync("/api/v1/baselines/recommendations/sha256:artifact123");
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);

        var result = await response.Content.ReadFromJsonAsync<BaselineRecommendationsResponseDto>(SerializerOptions);
        Assert.NotNull(result);
        Assert.Equal("sha256:artifact123", result!.ArtifactDigest);
        Assert.NotEmpty(result.Recommendations);
        Assert.Contains(result.Recommendations, r => r.IsDefault);
    }

    [Fact]
    public async Task GetRecommendations_WithEnvironment_FiltersCorrectly()
    {
        using var factory = new ScannerApplicationFactory();
        using var client = factory.CreateClient();

        var response = await client.GetAsync("/api/v1/baselines/recommendations/sha256:artifact123?environment=production");
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);

        var result = await response.Content.ReadFromJsonAsync<BaselineRecommendationsResponseDto>(SerializerOptions);
        Assert.NotNull(result);
        Assert.NotEmpty(result!.Recommendations);
    }

    [Fact]
    public async Task GetRecommendations_IncludesRationale()
    {
        using var factory = new ScannerApplicationFactory();
        using var client = factory.CreateClient();

        var response = await client.GetAsync("/api/v1/baselines/recommendations/sha256:artifact123");
        var result = await response.Content.ReadFromJsonAsync<BaselineRecommendationsResponseDto>(SerializerOptions);

        Assert.NotNull(result);
        foreach (var rec in result!.Recommendations)
        {
            Assert.NotEmpty(rec.Rationale);
            Assert.NotEmpty(rec.Type);
            Assert.NotEmpty(rec.Label);
        }
    }

    [Fact]
    public async Task GetRationale_ValidDigests_ReturnsDetailedRationale()
    {
        using var factory = new ScannerApplicationFactory();
        using var client = factory.CreateClient();

        var response = await client.GetAsync("/api/v1/baselines/rationale/sha256:base123/sha256:head456");
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);

        var result = await response.Content.ReadFromJsonAsync<BaselineRationaleResponseDto>(SerializerOptions);
        Assert.NotNull(result);
        Assert.Equal("sha256:base123", result!.BaseDigest);
        Assert.Equal("sha256:head456", result.HeadDigest);
        Assert.NotEmpty(result.SelectionType);
        Assert.NotEmpty(result.Rationale);
        Assert.NotEmpty(result.DetailedExplanation);
    }

    [Fact]
    public async Task GetRationale_IncludesSelectionCriteria()
    {
        using var factory = new ScannerApplicationFactory();
        using var client = factory.CreateClient();

        var response = await client.GetAsync("/api/v1/baselines/rationale/sha256:baseline-base123/sha256:head456");
        var result = await response.Content.ReadFromJsonAsync<BaselineRationaleResponseDto>(SerializerOptions);

        Assert.NotNull(result);
        Assert.NotNull(result!.SelectionCriteria);
        Assert.NotEmpty(result.SelectionCriteria);
    }

    [Fact]
    public async Task GetRecommendations_DefaultIsFirst()
    {
        using var factory = new ScannerApplicationFactory();
        using var client = factory.CreateClient();

        var response = await client.GetAsync("/api/v1/baselines/recommendations/sha256:artifact123");
        var result = await response.Content.ReadFromJsonAsync<BaselineRecommendationsResponseDto>(SerializerOptions);

        Assert.NotNull(result);
        Assert.NotEmpty(result!.Recommendations);
        Assert.True(result.Recommendations[0].IsDefault);
    }
}