import { act, render, screen, waitFor, within } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { http, HttpResponse, delay } from "msw";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import { server } from "../test/msw";
import { FakeEventSource } from "../test/fakeEventSource";
import { useSessionStore } from "../store/sessionStore";
import { AppShell } from "./AppShell";
import { clearAuthState, setAuthState } from "../auth/authState";
import { workspacePreferences } from "../workspaces/preferences";

function renderShell() {
  const client = new QueryClient({ defaultOptions: { queries: { retry: false } } });
  return render(<QueryClientProvider client={client}><AppShell canLogout={false} /></QueryClientProvider>);
}

beforeEach(() => {
  clearAuthState();
  setAuthState({
    issuer: "test", subject: "test", roles: ["user"], permissions: ["session.use"],
    isAdmin: false, csrfToken: null, session: null,
  });
  localStorage.clear();
  FakeEventSource.instances = [];
  (globalThis as any).EventSource = FakeEventSource;
  useSessionStore.getState().resetSession();
  server.use(
    http.get("/api/me", () => HttpResponse.json({ issuer: "test", subject: "test", displayName: "Test", isAdmin: false })),
    http.get("/api/sessions", () => HttpResponse.json([])),
    http.get("/api/settings", () =>
      HttpResponse.json({ workspace: "default", provider: "test", model: "test", thinking: "low" })),
    http.get("/api/workspaces", () => HttpResponse.json([])),
    http.get("/api/models", () => HttpResponse.json({ models: [] })),
  );
});

test("New session starts prewarm without delaying composer focus", async () => {
  let prewarmStarted = false;
  server.use(
    http.post("/api/runtime/prewarm", async () => {
      prewarmStarted = true;
      await delay(100);
      return new HttpResponse(null, { status: 202 });
    }),
  );
  renderShell();

  await userEvent.click(screen.getByRole("button", { name: /^new session$/i }));

  const composer = screen.getByRole("textbox", { name: /new question/i });
  await waitFor(() => expect(prewarmStarted).toBe(true));
  await waitFor(() => expect(composer).toHaveFocus());
  expect(composer).toHaveAttribute("data-awaiting-input", "true");
  expect(composer).toHaveClass("thot-awaiting-input");
});

test("records the prompt without central duplication, then opens the live log", async () => {
  let releaseCreate!: () => void;
  const createMayFinish = new Promise<void>((resolve) => { releaseCreate = resolve; });
  server.use(
    http.post("/api/sessions", async () => {
      await createMayFinish;
      return HttpResponse.json({ id: "s-new" });
    }),
  );
  renderShell();

  const composer = screen.getByRole("textbox", { name: /new question/i });
  await userEvent.type(composer, "How many patients?");
  await userEvent.click(screen.getByRole("button", { name: /send/i }));

  expect(screen.queryByText("How many patients?", { selector: "p" })).not.toBeInTheDocument();
  expect(screen.queryByText("Creating session…")).not.toBeInTheDocument();
  expect(screen.queryByText(/\d+s/)).not.toBeInTheDocument();
  expect(useSessionStore.getState().activityLog[0]).toEqual({
    kind: "prompt",
    phase: "F1",
    text: "How many patients?",
  });
  releaseCreate();
  await waitFor(() => expect(FakeEventSource.instances).toHaveLength(1));
  act(() => FakeEventSource.instances[0].emit({ type: "text_delta", text: "Inspecting cohort" }));
  expect(await screen.findByRole("log", { name: "Live model activity" }))
    .toHaveTextContent("Inspecting cohort");
  expect(screen.queryByText("Analyzing question…")).not.toBeInTheDocument();
  expect(useSessionStore.getState().currentPhase).toBe("F1");
});

test("a failed create restores the landing view and preserves the question for retry", async () => {
  server.use(
    http.post("/api/sessions", () =>
      new HttpResponse("unavailable", { status: 503 })),
  );
  renderShell();

  const composer = screen.getByRole("textbox", { name: /new question/i });
  await userEvent.type(composer, "Keep this question");
  await userEvent.click(screen.getByRole("button", { name: /send/i }));

  expect(await screen.findByText(/failed to create session/i)).toBeInTheDocument();
  expect(screen.getByText(/type your question/i)).toBeInTheDocument();
  expect(composer).toHaveValue("Keep this question");
  expect(useSessionStore.getState().lastUserEntry).toBeNull();
  expect(FakeEventSource.instances).toHaveLength(0);
});

test("a DWH-unreachable precheck shows a specific alert and preserves the question", async () => {
  server.use(
    http.post("/api/sessions", () =>
      HttpResponse.json(
        {
          error: "Cannot start a session: the database is unreachable. Check the VPN connection and try again.",
          code: "dwh_unreachable",
        },
        { status: 503 },
      )),
  );
  renderShell();

  const composer = screen.getByRole("textbox", { name: /new question/i });
  await userEvent.type(composer, "quanti pazienti?");
  await userEvent.click(screen.getByRole("button", { name: /send/i }));

  // Specific alert, not the generic "failed to create session" hint.
  expect(await screen.findByText(/database is unreachable/i)).toBeInTheDocument();
  expect(screen.queryByText(/failed to create session/i)).not.toBeInTheDocument();
  // No session was created: landing view stays and the question is kept for retry.
  expect(screen.getByText(/type your question/i)).toBeInTheDocument();
  expect(composer).toHaveValue("quanti pazienti?");
  expect(FakeEventSource.instances).toHaveLength(0);
});

test("model selector shows the three Pi-enabled models and stores the selected provider locally", async () => {
  server.use(
    http.get("/api/settings", () => HttpResponse.json({
      workspace: "default", provider: "zai", model: "glm-5.2", thinking: "low",
    })),
    http.get("/api/models", () => HttpResponse.json({ models: [
      { provider: "zai", id: "glm-5.2", name: "GLM-5.2", reasoning: true },
      { provider: "deepseek", id: "deepseek-v4-flash", name: "DeepSeek V4 Flash", reasoning: true },
      { provider: "local-qwen", id: "qwen3.6-35b-a3b", name: "Qwen3.6 35B A3B Local", reasoning: false },
    ] })),
  );
  renderShell();

  const select = await screen.findByRole("combobox", { name: "Model" });
  await waitFor(() => {
    expect(within(select).getAllByRole("option").map((option) => option.textContent)).toEqual([
      "GLM-5.2", "DeepSeek V4 Flash", "Qwen3.6 35B A3B Local",
    ]);
  });
  await userEvent.selectOptions(select, "qwen3.6-35b-a3b");
  await waitFor(() => expect(workspacePreferences.load()).toEqual({
      workspaceId: "default", provider: "local-qwen", model: "qwen3.6-35b-a3b", thinking: "low",
    }));
});

test("opens Workspace management from the right sidebar without interrupting the shell", async () => {
  server.use(
    http.get("/api/workspace-registry/status", () =>
      HttpResponse.json({ branch: "main", ahead: 0, behind: 0, degraded: false })),
  );
  renderShell();

  await userEvent.click(screen.getByRole("button", { name: "Workspace management" }));

  expect(await screen.findByRole("heading", { name: "Workspace management" })).toBeVisible();
  expect(screen.getByTestId("app-shell")).toHaveAttribute("data-activity-layout", "closed");
});


test("marks the composer as awaiting input for a pending freetext gate", () => {
  useSessionStore.setState({
    pendingWidget: { id: "free-1", widget: "freetext", title: "Clarify" },
  });
  renderShell();
  expect(screen.getByRole("textbox", { name: /new question/i })).toHaveAttribute("data-awaiting-input", "true");
});