using System.Net;
using System.Net.Http.Json;
using ItWorx.KnowledgeHub.Contracts.Projects;
using ItWorx.KnowledgeHub.IntegrationTests.Infrastructure;

namespace ItWorx.KnowledgeHub.IntegrationTests.Automation;

/// <summary>The bounded project context bundle (M6-A04): explicit maximum item
/// counts, deterministic ordering, and truncation metadata rather than silently
/// dropping items (docs/09-api-contract.md "Project context").</summary>
[Collection(PostgresTestGroup.Name)]
public sealed class ProjectContextTests(PostgresContainerFixture postgres) : OwnerSetupTestBase(postgres)
{
    [Fact]
    public async Task Project_context_reports_no_truncation_when_everything_fits_within_the_bounds()
    {
        using var client = Factory.CreateClient();
        await SetupHelper.LoginAsync(client, OwnerEmail, OwnerPassword);

        var projectResponse = await SetupHelper.PostWithCsrfAsync(
            client, "/api/v1/projects", new CreateProjectRequest("Contextproject", "S.", "Medium", "Start.", Guid.NewGuid()));
        var project = await projectResponse.Content.ReadFromJsonAsync<ProjectDetail>();
        Assert.NotNull(project);

        await SetupHelper.PostWithCsrfAsync(
            client, $"/api/v1/projects/{project.Id}/updates",
            new CreateProjectUpdateRequest("Progress", "Update 1", "S.", "Reported", null, null, null, null, null, null, null, null, null, null));

        var context = await client.GetFromJsonAsync<ProjectContextResponse>($"/api/v1/projects/{project.Id}/context");

        Assert.NotNull(context);
        Assert.Equal(project.Id, context.Project.Id);
        Assert.False(context.Truncation.Truncated);
        Assert.Empty(context.Truncation.OmittedCounts);
        Assert.Single(context.RecentUpdates);
    }

    [Fact]
    public async Task Project_context_truncates_updates_beyond_the_requested_bound_and_reports_the_omitted_count()
    {
        using var client = Factory.CreateClient();
        await SetupHelper.LoginAsync(client, OwnerEmail, OwnerPassword);

        var projectResponse = await SetupHelper.PostWithCsrfAsync(
            client, "/api/v1/projects", new CreateProjectRequest("Afgekapt project", "S.", "Medium", "Start.", Guid.NewGuid()));
        var project = await projectResponse.Content.ReadFromJsonAsync<ProjectDetail>();
        Assert.NotNull(project);

        for (var i = 0; i < 3; i++)
        {
            await SetupHelper.PostWithCsrfAsync(
                client, $"/api/v1/projects/{project.Id}/updates",
                new CreateProjectUpdateRequest("Progress", $"Update {i}", "S.", "Reported", null, null, null, null, null, null, null, null, null, null));
        }

        var context = await client.GetFromJsonAsync<ProjectContextResponse>($"/api/v1/projects/{project.Id}/context?updates=2");

        Assert.NotNull(context);
        Assert.Equal(2, context.RecentUpdates.Count);
        Assert.True(context.Truncation.Truncated);
        Assert.Equal(1, context.Truncation.OmittedCounts["updates"]);
    }

    [Fact]
    public async Task Project_context_carries_stable_citations_for_every_included_document()
    {
        using var client = Factory.CreateClient();
        await SetupHelper.LoginAsync(client, OwnerEmail, OwnerPassword);

        var projectResponse = await SetupHelper.PostWithCsrfAsync(
            client, "/api/v1/projects", new CreateProjectRequest("Citatieproject", "S.", "Medium", "Start.", Guid.NewGuid()));
        var project = await projectResponse.Content.ReadFromJsonAsync<ProjectDetail>();
        Assert.NotNull(project);

        var pageResponse = await SetupHelper.PostWithCsrfAsync(
            client, "/api/v1/pages",
            new ItWorx.KnowledgeHub.Contracts.Knowledge.CreatePageRequest(null, "Architectuurpagina", "WikiPage", "# A", null));
        var page = await pageResponse.Content.ReadFromJsonAsync<ItWorx.KnowledgeHub.Contracts.Knowledge.PageDetail>();
        Assert.NotNull(page);

        await SetupHelper.PostWithCsrfAsync(
            client, $"/api/v1/projects/{project.Id}/documents", new LinkProjectDocumentRequest(page.Id, "Architecture"));

        var context = await client.GetFromJsonAsync<ProjectContextResponse>($"/api/v1/projects/{project.Id}/context");

        Assert.NotNull(context);
        var citation = Assert.Single(context.Citations, item => item.Id == page.Id);
        Assert.Equal("page", citation.Kind);
        Assert.Equal(page.Title, citation.Title);
    }

    [Fact]
    public async Task Project_context_is_not_reachable_without_authentication()
    {
        using var client = Factory.CreateClient();

        var response = await client.GetAsync($"/api/v1/projects/{Guid.NewGuid()}/context");

        Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);
    }
}