using System.Net;
using System.Net.Http.Headers;
using System.Net.Http.Json;
using Microsoft.Extensions.DependencyInjection;
using TeamUp.Modules.Skills.Domain;
using TeamUp.Modules.Skills.Indexing;
using Xunit;

namespace TeamUp.IntegrationTests;

/// <summary>
/// The skill marketplace, end to end: the publish gate (only golden-tested may list), own-org
/// exclusion, another org's published skill listed and installed as a private copy, the duplicate
/// conflict, and ManageSkills authorization. One flow per class — bootstrap is single-use.
/// </summary>
public sealed class SkillMarketplaceTests(PostgresFixture postgres) : IClassFixture<PostgresFixture>
{
    private sealed record BootstrapResponse(string Token, Guid MemberId, Guid OrganizationId);

    private sealed record AuthResponse(string Token, Guid MemberId);

    private sealed record InviteResponse(Guid InvitationId, string Token);

    private sealed record ActionDto(string Name, string Risk, string? Description);

    private sealed record GoldenTestDto(string Input, string Expected);

    private sealed record SkillSummary(
        Guid Id, string SkillKey, string Name, string Version, string? Summary, List<string> Roles,
        string Visibility, string MinTier, string Status, string Origin, Guid? OrganizationId,
        int GoldenTestCount, List<ActionDto> Actions);

    private sealed record SkillDetail(
        SkillSummary Skill, string? Inputs, string? Outputs, List<string> Tools,
        List<string> Context, List<GoldenTestDto> GoldenTests, string Body);

    private sealed record MarketplaceEntry(SkillSummary Skill, bool AlreadyInLibrary);

    [Fact]
    public async Task Publishes_lists_installs_with_gate_own_exclusion_and_authorization()
    {
        await using var factory = new TeamUpWebFactory(postgres.ConnectionString);
        using var anon = factory.CreateClient();

        var orgA = await PostOk<BootstrapResponse>(anon, "/api/identity/bootstrap", new
        {
            organizationName = "OrgA",
            ownerEmail = "owner@alia.test",
            ownerDisplayName = "Owner",
            ownerPassword = "Passw0rd!",
        });
        using var client = Authed(factory, orgA.Token);

        // Gate: a Draft (no golden test) cannot be listed on the marketplace.
        await PostOk<SkillDetail>(client, "/api/skills/authored", Authored(orgA.OrganizationId, "draft-skill", goldenTested: false));
        var cantPublish = await client.PostAsJsonAsync("/api/skills/draft-skill/publish",
            new { organizationId = orgA.OrganizationId, version = "1.0.0" });
        Assert.Equal(HttpStatusCode.BadRequest, cantPublish.StatusCode);

        // A published skill lists fine; visibility flips to Public, but it never shows in its own org's marketplace.
        await PostOk<SkillDetail>(client, "/api/skills/authored", Authored(orgA.OrganizationId, "prod-skill", goldenTested: true));
        var published = await PostOk<SkillDetail>(client, "/api/skills/prod-skill/publish",
            new { organizationId = orgA.OrganizationId, version = "1.0.0" });
        Assert.Equal("Public", published.Skill.Visibility);

        var ownMarket = await client.GetFromJsonAsync<List<MarketplaceEntry>>(
            $"/api/skills/marketplace?organizationId={orgA.OrganizationId}");
        Assert.DoesNotContain(ownMarket!, e => e.Skill.SkillKey == "prod-skill");

        // You can't install your own skill.
        var prod = await client.GetFromJsonAsync<List<SkillDetail>>(
            $"/api/skills/prod-skill?organizationId={orgA.OrganizationId}");
        var installOwn = await client.PostAsJsonAsync("/api/skills/install",
            new { organizationId = orgA.OrganizationId, sourceSkillId = prod!.Single().Skill.Id });
        Assert.Equal(HttpStatusCode.BadRequest, installOwn.StatusCode);

        // Another org's published skill (no second-org onboarding yet — seed it via the indexer).
        var orgB = Guid.NewGuid();
        var sourceId = await SeedPublishedSkillAsync(factory, orgB, "research-brief", "Research Brief");

        // Org A sees org B's skill on the marketplace, not yet in its library.
        var market = await client.GetFromJsonAsync<List<MarketplaceEntry>>(
            $"/api/skills/marketplace?organizationId={orgA.OrganizationId}");
        var entry = Assert.Single(market!, e => e.Skill.SkillKey == "research-brief");
        Assert.False(entry.AlreadyInLibrary);
        Assert.Equal(sourceId, entry.Skill.Id);

        // Installing lands a private, Installed copy in org A's namespace.
        var installed = await PostOk<SkillDetail>(client, "/api/skills/install",
            new { organizationId = orgA.OrganizationId, sourceSkillId = sourceId });
        Assert.Equal("Installed", installed.Skill.Origin);
        Assert.Equal(orgA.OrganizationId, installed.Skill.OrganizationId);
        Assert.Equal("PrivateToOrg", installed.Skill.Visibility);
        Assert.Equal("research-brief", installed.Skill.SkillKey);

        // Now it's in the library (flagged), and re-installing the same version is a conflict.
        var market2 = await client.GetFromJsonAsync<List<MarketplaceEntry>>(
            $"/api/skills/marketplace?organizationId={orgA.OrganizationId}");
        Assert.True(Assert.Single(market2!, e => e.Skill.SkillKey == "research-brief").AlreadyInLibrary);

        var dup = await client.PostAsJsonAsync("/api/skills/install",
            new { organizationId = orgA.OrganizationId, sourceSkillId = sourceId });
        Assert.Equal(HttpStatusCode.Conflict, dup.StatusCode);

        // A newer version of an already-installed key stays installable — the flag is per (key, version).
        var sourceV2 = await SeedPublishedSkillAsync(factory, orgB, "research-brief", "Research Brief", "2.0.0");
        var market3 = await client.GetFromJsonAsync<List<MarketplaceEntry>>(
            $"/api/skills/marketplace?organizationId={orgA.OrganizationId}");
        Assert.False(Assert.Single(market3!, e => e.Skill.Id == sourceV2).AlreadyInLibrary);
        Assert.True(Assert.Single(market3!, e => e.Skill.SkillKey == "research-brief" && e.Skill.Version == "1.0.0").AlreadyInLibrary);

        // Invariant: re-authoring a listed version without golden tests cannot leave it Public.
        await PostOk<SkillDetail>(client, "/api/skills/authored", Authored(orgA.OrganizationId, "regate-skill", goldenTested: true));
        await PostOk<SkillDetail>(client, "/api/skills/regate-skill/publish",
            new { organizationId = orgA.OrganizationId, version = "1.0.0" });
        var degated = await PostOk<SkillDetail>(client, "/api/skills/authored",
            Authored(orgA.OrganizationId, "regate-skill", goldenTested: false, visibility: "public"));
        Assert.Equal("Draft", degated.Skill.Status);
        Assert.Equal("PrivateToOrg", degated.Skill.Visibility);

        // A plain Member cannot publish/unpublish (ManageSkills).
        var invite = await PostOk<InviteResponse>(client, "/api/identity/invitations", new
        {
            email = "member@alia.test",
            scopeType = "Organization",
            scopeId = orgA.OrganizationId,
            role = "Member",
            organizationId = orgA.OrganizationId,
        });
        var member = await PostOk<AuthResponse>(anon, "/api/identity/invitations/accept",
            new { token = invite.Token, displayName = "Member", password = "Passw0rd!" });
        using var memberClient = Authed(factory, member.Token);
        var forbidden = await memberClient.PostAsJsonAsync("/api/skills/prod-skill/unpublish",
            new { organizationId = orgA.OrganizationId, version = "1.0.0" });
        Assert.Equal(HttpStatusCode.Forbidden, forbidden.StatusCode);
    }

    private static object Authored(Guid organizationId, string key, bool goldenTested, string visibility = "private") => new
    {
        organizationId,
        skillKey = key,
        name = key,
        version = "1.0.0",
        summary = "x",
        roles = new[] { "engineer" },
        inputs = (string?)null,
        outputs = (string?)null,
        actions = Array.Empty<ActionDto>(),
        tools = Array.Empty<string>(),
        context = Array.Empty<string>(),
        visibility,
        minTier = "free",
        body = "Do the thing.",
        goldenTests = goldenTested
            ? new[] { new GoldenTestDto("in", "out") }
            : Array.Empty<GoldenTestDto>(),
    };

    // No public second-org onboarding yet, so seed the "other org's" published skill directly through
    // the same indexer the authoring endpoint uses (InternalsVisibleTo grants the test access).
    private static async Task<Guid> SeedPublishedSkillAsync(
        TeamUpWebFactory factory, Guid orgId, string key, string name, string version = "1.0.0")
    {
        using var scope = factory.Services.CreateScope();
        var indexer = scope.ServiceProvider.GetRequiredService<SkillIndexer>();
        var manifest = new SkillManifest
        {
            Id = key,
            Name = name,
            Version = version,
            Summary = "A shared, published skill.",
            Roles = ["analyst"],
            Visibility = "public",
            GoldenTests = [new GoldenExample { Input = "a topic", Expected = "a brief" }],
        };
        var skill = await indexer.IndexAsync(manifest, "Write a research brief.", SkillOwnership.Authored(orgId, Guid.NewGuid()));
        return skill.Id;
    }

    private static HttpClient Authed(TeamUpWebFactory factory, string token)
    {
        var client = factory.CreateClient();
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
        return client;
    }

    private static async Task<T> PostOk<T>(HttpClient client, string url, object body)
    {
        var response = await client.PostAsJsonAsync(url, body);
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        var value = await response.Content.ReadFromJsonAsync<T>();
        Assert.NotNull(value);
        return value!;
    }
}