using System.Net;
using System.Net.Http.Json;
using FluentAssertions;
using Microsoft.AspNetCore.Mvc.Testing;
using StellaOps.SbomService.Models;
using Xunit;

namespace StellaOps.SbomService.Tests;

public class SbomEndpointsTests : IClassFixture<WebApplicationFactory<Program>>
{
    private readonly WebApplicationFactory<Program> _factory;

    public SbomEndpointsTests(WebApplicationFactory<Program> factory)
    {
        _factory = factory.WithWebHostBuilder(_ => { });
    }

    [Fact]
    public async Task Paths_requires_purl()
    {
        var client = _factory.CreateClient();

        var response = await client.GetAsync("/sbom/paths");

        var body = await response.Content.ReadAsStringAsync();
        response.StatusCode.Should().Be(HttpStatusCode.BadRequest, body);
    }

    [Fact]
    public async Task Paths_returns_seeded_paths_with_cursor()
    {
        var client = _factory.CreateClient();

        var response = await client.GetAsync("/sbom/paths?purl=pkg:npm/lodash@4.17.21&limit=1");
        response.EnsureSuccessStatusCode();

        var payload = await response.Content.ReadFromJsonAsync<SbomPathResult>();
        payload.Should().NotBeNull();
        payload!.Paths.Should().HaveCount(1);
        payload.Purl.Should().Be("pkg:npm/lodash@4.17.21");
        payload.NextCursor.Should().Be("1");
    }

    [Fact]
    public async Task Versions_returns_descending_timeline()
    {
        var client = _factory.CreateClient();

        var response = await client.GetAsync("/sbom/versions?artifact=ghcr.io/stellaops/sample-api");
        response.StatusCode.Should().Be(HttpStatusCode.OK, await response.Content.ReadAsStringAsync());

        var payload = await response.Content.ReadFromJsonAsync<SbomTimelineResult>();
        payload.Should().NotBeNull();
        payload!.Versions.Should().HaveCountGreaterThan(0);
        payload.Versions.Should().BeInDescendingOrder(v => v.CreatedAt);
    }

    [Fact]
    public async Task Console_sboms_supports_filters_and_cursor()
    {
        var client = _factory.CreateClient();

        var response = await client.GetAsync("/console/sboms?artifact=sample-api&limit=1");
        response.EnsureSuccessStatusCode();

        var payload = await response.Content.ReadFromJsonAsync<SbomCatalogResult>();
        payload.Should().NotBeNull();
        payload!.Items.Should().HaveCount(1);
        payload.Items[0].Artifact.Should().Contain("sample-api");
        payload.NextCursor.Should().Be("1");
    }

    [Fact]
    public async Task Console_sboms_filters_by_license_and_asset_tag()
    {
        var client = _factory.CreateClient();

        var response = await client.GetAsync("/console/sboms?license=MIT&assetTag=owner&limit=5");
        response.EnsureSuccessStatusCode();

        var payload = await response.Content.ReadFromJsonAsync<SbomCatalogResult>();
        payload.Should().NotBeNull();
        payload!.Items.Should().OnlyContain(i => i.License == "MIT" && i.AssetTags.ContainsKey("owner"));
        payload.NextCursor.Should().BeNull();
    }

    [Fact]
    public async Task Console_sboms_paginates_with_cursor_offset()
    {
        var client = _factory.CreateClient();

        var first = await client.GetAsync("/console/sboms?artifact=sample&limit=1");
        first.EnsureSuccessStatusCode();
        var firstPage = await first.Content.ReadFromJsonAsync<SbomCatalogResult>();
        firstPage!.Items.Should().HaveCount(1);
        firstPage.NextCursor.Should().Be("1");

        var second = await client.GetAsync("/console/sboms?artifact=sample&limit=2&cursor=1");
        second.EnsureSuccessStatusCode();
        var secondPage = await second.Content.ReadFromJsonAsync<SbomCatalogResult>();
        secondPage!.Items.Should().HaveCount(2);
        secondPage.Items.Should().OnlyContain(i => i.Artifact.Contains("sample"));
        secondPage.NextCursor.Should().BeNull();
    }

    [Fact]
    public async Task Components_lookup_requires_purl_and_paginates()
    {
        var client = _factory.CreateClient();

        var bad = await client.GetAsync("/components/lookup");
        bad.StatusCode.Should().Be(HttpStatusCode.BadRequest);

        var response = await client.GetAsync("/components/lookup?purl=pkg:npm/lodash@4.17.21&limit=1");
        response.EnsureSuccessStatusCode();

        var payload = await response.Content.ReadFromJsonAsync<ComponentLookupResult>();
        payload.Should().NotBeNull();
        payload!.Neighbors.Should().HaveCount(1);
        payload.Neighbors[0].Purl.Should().Contain("express");
        payload.NextCursor.Should().Be("1");

        var second = await client.GetAsync("/components/lookup?purl=pkg:npm/lodash@4.17.21&limit=2&cursor=1");
        second.EnsureSuccessStatusCode();
        var secondPage = await second.Content.ReadFromJsonAsync<ComponentLookupResult>();
        secondPage.Should().NotBeNull();
        secondPage!.Neighbors.Should().HaveCount(2);
        secondPage.Neighbors.Should().OnlyContain(n => n.Purl.StartsWith("pkg:npm/", StringComparison.OrdinalIgnoreCase));
        secondPage.NextCursor.Should().BeNull();
    }
}