using System.Net;
using System.Net.Http.Headers;
using System.Net.Http.Json;
using Microsoft.Extensions.DependencyInjection;
using TeamUp.Modules.Assembler.Queue;
using TeamUp.Modules.Assembler.Runtime;
using TeamUp.SharedKernel.Access;
using TeamUp.SharedKernel.Ai;
using Xunit;

namespace TeamUp.IntegrationTests;

/// <summary>
/// M5 acceptance: Aria (gated) proposes a spec → it waits in the owner's review inbox with its
/// trace → the owner edits and approves → the artifact lands and four child tasks appear on the
/// board → edit distance is recorded. Plus: a Member cannot approve; an Autonomous agent's draft
/// executes without review; destructive ALWAYS holds; send-back works.
/// </summary>
public sealed class ReviewFlowTests(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 IdResponse(Guid Id);

    private sealed record TeamResponse(Guid Id, Guid OrganizationId, string Name);

    private sealed record SeatResponse(Guid Id, Guid TeamId, string RoleName, string State, Guid? MemberId, Guid? AgentId);

    private sealed record SyncResult(int Indexed);

    private sealed record RunResponse(
        Guid Id, Guid SeatId, Guid WorkItemId, Guid? AgentId, string Status,
        string? ActionType, string? ActionRisk, string? Prompt, string? Output, string? Error);

    private sealed record ReviewItemResponse(
        Guid Id, Guid OrganizationId, Guid TeamId, Guid AgentRunId, Guid AgentId, Guid WorkItemId,
        string ActionKind, string Risk, string Title, string Content, List<string> ChildTitles,
        string? Trace, string Status, string? Decision, double? EditDistance, DateTimeOffset CreatedAtUtc);

    private sealed record TaskResponse(
        Guid Id, Guid TeamId, string Title, string? Description, string Type,
        string Status, string AssigneeKind, Guid? AssigneeId, Guid? ParentId);

    private sealed record BoardColumn(string Status, List<TaskResponse> Items);

    private sealed record BoardResponse(Guid TeamId, List<BoardColumn> Columns);

    private sealed record AuditEntryResponse(
        Guid Id, string Action, string EntityType, Guid EntityId,
        Guid? ActorMemberId, string? Details, DateTimeOffset OccurredAtUtc);

    [Fact]
    public async Task Gated_run_holds_for_review_then_edit_and_approve_lands_on_the_board()
    {
        var settings = new Dictionary<string, string?>
        {
            ["GitSource:Provider"] = "filesystem",
            ["GitSource:Root"] = LocateSkillsDirectory(),
        };

        await using var factory = new TeamUpWebFactory(postgres.ConnectionString, settings);
        using var anon = factory.CreateClient();

        // --- Setup: owner, org, team, stub BYOK config, skills, Aria (gated) on a seat ---
        var owner = await PostOk<BootstrapResponse>(anon, "/api/identity/bootstrap", new
        {
            organizationName = "AliaSaaS",
            ownerEmail = "owner@alia.test",
            ownerDisplayName = "Owner",
            ownerPassword = "Passw0rd!",
        });
        using var client = Authed(factory, owner.Token);

        await client.PostAsJsonAsync("/api/orgboard/organizations", new { organizationId = owner.OrganizationId, name = "AliaSaaS" });
        var team = await PostOk<TeamResponse>(client, "/api/orgboard/teams", new { organizationId = owner.OrganizationId, name = "IPNOPS" });
        var config = await PostOk<IdResponse>(client, "/api/integrations/api-configs", new
        {
            organizationId = owner.OrganizationId,
            name = "Vertex-Pro",
            provider = "stub",
            model = "gemini-pro",
            apiKey = "sk-demo-key",
        });
        await PostOk<SyncResult>(client, "/api/skills/sync", new { });

        var seat = await PostOk<SeatResponse>(client, "/api/orgboard/seats", new { teamId = team.Id, roleName = "Product Owner" });
        await client.PostAsJsonAsync($"/api/orgboard/seats/{seat.Id}/agent", new
        {
            name = "Aria",
            monogram = "AR",
            autonomy = "Gated",
            apiConfigId = config.Id,
            skillKeys = new[] { "spec-writing", "story-breakdown" },
            docs = Array.Empty<string>(),
        });

        var task = await PostOk<TaskResponse>(client, "/api/orgboard/tasks", new
        {
            teamId = team.Id,
            title = "Add a logout button to the header",
            description = "Users need a way to end their session.",
            type = "Spec",
        });

        // --- Run Aria against the task; the worker drains it ---
        var run = await PostOk<RunResponse>(client, "/api/assembler/runs", new { seatId = seat.Id, workItemId = task.Id });
        await DrainOneJob(factory);
        var done = await client.GetFromJsonAsync<RunResponse>($"/api/assembler/runs/{run.Id}");
        Assert.Equal("Completed", done!.Status);

        // --- The gated draft is HELD: it waits in the review inbox with its trace ---
        var pending = await client.GetFromJsonAsync<List<ReviewItemResponse>>(
            $"/api/governance/reviews?organizationId={owner.OrganizationId}");
        var held = Assert.Single(pending!);
        Assert.Equal("Pending", held.Status);
        Assert.Equal("write-spec", held.ActionKind);
        Assert.Equal("Draft", held.Risk);
        Assert.Equal(task.Id, held.WorkItemId);
        Assert.False(string.IsNullOrWhiteSpace(held.Trace)); // the expandable reasoning trace

        // --- A plain Member cannot approve (owner/team-owner capability) ---
        var invite = await PostOk<InviteResponse>(client, "/api/identity/invitations", new
        {
            email = "dev@alia.test",
            scopeType = "Organization",
            scopeId = owner.OrganizationId,
            role = "Member",
            organizationId = owner.OrganizationId,
        });
        var member = await PostOk<AuthResponse>(anon, "/api/identity/invitations/accept",
            new { token = invite.Token, displayName = "Dev", password = "Passw0rd!" });
        using (var memberClient = Authed(factory, member.Token))
        {
            var forbidden = await memberClient.PostAsJsonAsync($"/api/governance/reviews/{held.Id}/approve", new { });
            Assert.Equal(HttpStatusCode.Forbidden, forbidden.StatusCode);
        }

        // --- Owner edits and approves: final spec + four child stories ---
        string[] children =
        [
            "Add a logout button to the header (authenticated only)",
            "Clear the session and redirect to /login on click",
            "Hide the logout button when signed out",
            "Add a regression test for protected routes after logout",
        ];
        var approved = await PostOk<ReviewItemResponse>(client, $"/api/governance/reviews/{held.Id}/approve", new
        {
            content = "Spec: a logout button in the header that ends the session and returns to sign-in.",
            childTitles = children,
        });
        Assert.Equal("Approved", approved.Status);
        Assert.Equal("EditedAndApproved", approved.Decision);
        Assert.NotNull(approved.EditDistance);
        Assert.True(approved.EditDistance > 0, "editing before approval must record a positive edit distance");

        // --- The artifact + four child tasks landed on the board ---
        var board = await client.GetFromJsonAsync<BoardResponse>($"/api/orgboard/board?teamId={team.Id}");
        var all = board!.Columns.SelectMany(c => c.Items).ToList();
        var parent = all.Single(i => i.Id == task.Id);
        Assert.Contains("Spec: a logout button", parent.Description);
        var childTasks = all.Where(i => i.ParentId == task.Id).ToList();
        Assert.Equal(4, childTasks.Count);
        Assert.All(childTasks, c => Assert.Equal("Story", c.Type));

        // --- Deciding twice is rejected ---
        var again = await client.PostAsJsonAsync($"/api/governance/reviews/{held.Id}/approve", new { });
        Assert.Equal(HttpStatusCode.Conflict, again.StatusCode);

        // --- Audit recorded the hold and the edited approval (with the metric) ---
        var audit = await client.GetFromJsonAsync<List<AuditEntryResponse>>(
            $"/api/governance/audit?organizationId={owner.OrganizationId}&take=200");
        Assert.Contains(audit!, e => e.Action == "action.held" && e.EntityId == held.Id);
        Assert.Contains(audit!, e => e.Action == "review.edited-approved"
            && e.EntityId == held.Id && (e.Details ?? "").Contains("editDistance="));

        // --- An Autonomous agent's draft executes without review ---
        var seatQa = await PostOk<SeatResponse>(client, "/api/orgboard/seats", new { teamId = team.Id, roleName = "QA" });
        await client.PostAsJsonAsync($"/api/orgboard/seats/{seatQa.Id}/agent", new
        {
            name = "Quill",
            monogram = "QU",
            autonomy = "Autonomous",
            apiConfigId = config.Id,
            skillKeys = new[] { "test-plan-generation", "diff-review" },
            docs = Array.Empty<string>(),
        });
        var qaTask = await PostOk<TaskResponse>(client, "/api/orgboard/tasks", new
        {
            teamId = team.Id,
            title = "QA the logout flow",
            description = (string?)null,
            type = "Test",
        });
        await PostOk<RunResponse>(client, "/api/assembler/runs", new { seatId = seatQa.Id, workItemId = qaTask.Id });
        await DrainOneJob(factory);

        var pendingAfter = await client.GetFromJsonAsync<List<ReviewItemResponse>>(
            $"/api/governance/reviews?organizationId={owner.OrganizationId}");
        Assert.Empty(pendingAfter!); // nothing new held

        var boardAfter = await client.GetFromJsonAsync<BoardResponse>($"/api/orgboard/board?teamId={team.Id}");
        var qaParent = boardAfter!.Columns.SelectMany(c => c.Items).Single(i => i.Id == qaTask.Id);
        Assert.Contains("[stub", qaParent.Description); // the artifact executed straight onto the task

        // --- Destructive ALWAYS holds, even for an Autonomous seat — and send-back works ---
        await using (var scope = factory.Services.CreateAsyncScope())
        {
            var gate = scope.ServiceProvider.GetRequiredService<IActionGate>();
            var result = await gate.EvaluateAsync(new AgentActionProposal(
                Guid.NewGuid(), seatQa.Id, seatQa.AgentId ?? Guid.NewGuid(), qaTask.Id,
                team.Id, owner.OrganizationId, Autonomy.Autonomous,
                "delete-branch", "Destructive", "Delete the release branch", "rm -rf …", [], null));
            Assert.Equal(GateOutcome.Held, result.Outcome);
            Assert.NotNull(result.ReviewItemId);

            var sentBack = await PostOk<ReviewItemResponse>(
                client, $"/api/governance/reviews/{result.ReviewItemId}/sendback", new { });
            Assert.Equal("SentBack", sentBack.Status);
        }
    }

    private static async Task DrainOneJob(TeamUpWebFactory factory)
    {
        await using var scope = factory.Services.CreateAsyncScope();
        var queue = scope.ServiceProvider.GetRequiredService<JobQueue>();
        var job = await queue.ClaimNextAsync("test-worker");
        Assert.NotNull(job);
        await scope.ServiceProvider.GetRequiredService<AgentRunExecutor>().ProcessAsync(job!);
    }

    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!;
    }

    private static string LocateSkillsDirectory()
    {
        var dir = new DirectoryInfo(AppContext.BaseDirectory);
        while (dir is not null && !File.Exists(Path.Combine(dir.FullName, "TeamUp.slnx")))
        {
            dir = dir.Parent;
        }

        Assert.NotNull(dir);
        return Path.Combine(dir!.FullName, "skills");
    }
}