import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { act, render, screen, waitFor, within } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import { NextStepsCard } from "./next-steps-card";
import { colonyNextStepsKey, fetchColonyNextSteps } from "@/lib/autopilot/api";
import { colonyStepsFixture, stepFixture } from "@/lib/autopilot/step-fixtures";
import { acceptSuggestion, bulkDismissSuggestions, reopenSuggestion } from "@/lib/suggestions/api";
import { ApiError } from "@/lib/auth/api-client";
import { reportRequestOutcome } from "@/lib/offline/connectivity";
import { toast } from "sonner";

vi.mock("@/lib/autopilot/api", async (importOriginal) => ({
  ...(await importOriginal<typeof import("@/lib/autopilot/api")>()),
  fetchColonyNextSteps: vi.fn(),
}));
vi.mock("@/lib/suggestions/api", async (importOriginal) => ({
  ...(await importOriginal<typeof import("@/lib/suggestions/api")>()),
  acceptSuggestion: vi.fn(),
  bulkDismissSuggestions: vi.fn(),
  reopenSuggestion: vi.fn(),
}));
vi.mock("@/lib/auth/auth-context", () => ({
  useAuth: () => ({ hasPermission: () => true }),
}));
vi.mock("@/components/suggestions/cleanup-sheet", () => ({
  CleanupSheet: ({ suggestionId }: { suggestionId: string | null }) =>
    suggestionId ? <p>Aufräumen-Sheet {suggestionId}</p> : null,
}));
vi.mock("sonner", () => ({
  toast: Object.assign(vi.fn(), { success: vi.fn(), error: vi.fn() }),
}));

function renderCard() {
  const client = new QueryClient({ defaultOptions: { queries: { retry: false } } });
  return render(
    <QueryClientProvider client={client}>
      <NextStepsCard colonyId="c1" />
    </QueryClientProvider>,
  );
}

const TASK_STEP = stepFixture({
  key: "task:t2",
  kind: "TASK",
  title: "Zwei",
  reasons: [],
  suggestionIds: [],
  action: { type: "OPEN_TASK", taskId: "t2", href: "/tasks" },
});

describe("NextStepsCard", () => {
  afterEach(() => {
    act(() => reportRequestOutcome("reached-server"));
  });

  beforeEach(() => {
    vi.mocked(fetchColonyNextSteps).mockReset();
    vi.mocked(acceptSuggestion).mockReset();
    vi.mocked(bulkDismissSuggestions).mockReset();
  });

  it("NextStepsCard shows at most 3 steps with reasons and links CAPTURE to the form with colonyId", async () => {
    vi.mocked(fetchColonyNextSteps).mockResolvedValue(
      colonyStepsFixture({
        steps: [
          stepFixture({ key: "suggestion:s1", title: "Durchsicht" }),
          TASK_STEP,
          stepFixture({ key: "suggestion:s3", title: "Drei", suggestionIds: ["s3"] }),
          stepFixture({ key: "suggestion:s4", title: "Vier", suggestionIds: ["s4"] }),
        ],
      }),
    );
    renderCard();

    expect(await screen.findByText("Durchsicht")).toBeInTheDocument();
    expect(screen.getAllByRole("heading", { level: 3 })).toHaveLength(3);
    expect(screen.queryByText("Vier")).not.toBeInTheDocument();
    expect(screen.getAllByText("Letzte Durchsicht vor 8 Tagen.").length).toBeGreaterThan(0);
    expect(screen.getAllByText("In der Schwarmzeit alle 7 Tage.").length).toBeGreaterThan(0);
    const first = screen.getAllByRole("heading", { level: 3 })[0].closest("li") as HTMLElement;
    expect(within(first).getByRole("link", { name: "Erfassen" })).toHaveAttribute(
      "href",
      "/inspections/new?colonyId=c1",
    );
    expect(screen.getByRole("link", { name: "Aufgabe öffnen" })).toHaveAttribute("href", "/tasks");
  });

  it("NextStepsCard shows the withdrawal hint, not a step", async () => {
    vi.mocked(fetchColonyNextSteps).mockResolvedValue(
      colonyStepsFixture({ steps: [], withdrawalUntil: "2026-05-05" }),
    );
    renderCard();

    expect(await screen.findByText("Wartezeit bis 05.05.")).toBeInTheDocument();
    expect(screen.queryAllByRole("listitem")).toHaveLength(0);
  });

  it("accepts a step with one tap and an idempotency key", async () => {
    vi.mocked(fetchColonyNextSteps).mockResolvedValue(
      colonyStepsFixture({
        steps: [
          stepFixture({
            intent: "HONEY_SUPER",
            title: "Honigraum",
            action: { type: "ACCEPT", suggestionId: "s1" },
          }),
        ],
      }),
    );
    vi.mocked(acceptSuggestion).mockResolvedValue({} as never);
    renderCard();

    await userEvent.click(await screen.findByRole("button", { name: "Übernehmen" }));

    expect(acceptSuggestion).toHaveBeenCalledWith("s1", {}, { idempotencyKey: expect.any(String) });
  });

  it("dismisses a merged step with all its suggestion ids", async () => {
    vi.mocked(fetchColonyNextSteps).mockResolvedValue(
      colonyStepsFixture({ steps: [stepFixture({ suggestionIds: ["s1", "s2"] })] }),
    );
    vi.mocked(bulkDismissSuggestions).mockResolvedValue({ dismissed: 2 });
    renderCard();

    await userEvent.click(await screen.findByRole("button", { name: "Verwerfen" }));

    expect(bulkDismissSuggestions).toHaveBeenCalledWith(["s1", "s2"], {
      idempotencyKey: expect.any(String),
    });
  });

  it("opens the cleanup sheet for a CLEANUP step", async () => {
    vi.mocked(fetchColonyNextSteps).mockResolvedValue(
      colonyStepsFixture({
        steps: [
          stepFixture({
            intent: "CLEANUP",
            title: "Volk aufräumen",
            suggestionIds: ["s9"],
            action: { type: "CLEANUP", suggestionId: "s9" },
          }),
        ],
      }),
    );
    renderCard();

    await userEvent.click(await screen.findByRole("button", { name: "Aufräumen" }));

    expect(screen.getByText("Aufräumen-Sheet s9")).toBeInTheDocument();
  });

  it("renders nothing while there is nothing to say", async () => {
    vi.mocked(fetchColonyNextSteps).mockResolvedValue(colonyStepsFixture({ steps: [] }));
    const { container } = renderCard();

    await vi.waitFor(() => expect(fetchColonyNextSteps).toHaveBeenCalled());
    expect(container).toBeEmptyDOMElement();
  });

  it("makes only the first step's action primary and the rest outline", async () => {
    vi.mocked(fetchColonyNextSteps).mockResolvedValue(
      colonyStepsFixture({
        steps: [stepFixture({ key: "suggestion:s1" }), stepFixture({ key: "suggestion:s2", title: "Zweite", suggestionIds: ["s2"] })],
      }),
    );
    renderCard();

    const links = await screen.findAllByRole("link", { name: "Erfassen" });
    expect(links[0]).toHaveClass("bg-primary");
    expect(links[1]).not.toHaveClass("bg-primary");
  });

  it("announces only a short status, not the whole list", async () => {
    vi.mocked(fetchColonyNextSteps).mockResolvedValue(colonyStepsFixture());
    const { container } = renderCard();

    await screen.findByText("Durchsicht");
    expect(screen.getByRole("status")).toHaveTextContent("1 nächster Schritt");
    expect(container.querySelector("[aria-live]")).toBeNull();
  });

  it("moves focus to the heading after a decision, or to the page h1 when the section is gone", async () => {
    vi.mocked(bulkDismissSuggestions).mockResolvedValue({ dismissed: 1 });
    vi.mocked(fetchColonyNextSteps)
      .mockResolvedValueOnce(colonyStepsFixture())
      .mockResolvedValueOnce(colonyStepsFixture());
    const client = new QueryClient({ defaultOptions: { queries: { retry: false } } });
    render(
      <QueryClientProvider client={client}>
        <h1>V-01</h1>
        <NextStepsCard colonyId="c1" />
      </QueryClientProvider>,
    );

    await userEvent.click(await screen.findByRole("button", { name: "Verwerfen" }));
    await vi.waitFor(() =>
      expect(screen.getByRole("heading", { name: "Als Nächstes" })).toHaveFocus(),
    );

    vi.mocked(fetchColonyNextSteps).mockResolvedValue(colonyStepsFixture({ steps: [] }));
    await userEvent.click(screen.getByRole("button", { name: "Verwerfen" }));
    await vi.waitFor(() => expect(screen.getByRole("heading", { name: "V-01" })).toHaveFocus());
  });

  it("reports a partly failed undo as „n von m wieder geöffnet“", async () => {
    vi.mocked(fetchColonyNextSteps).mockResolvedValue(
      colonyStepsFixture({ steps: [stepFixture({ suggestionIds: ["s1", "s2"] })] }),
    );
    vi.mocked(bulkDismissSuggestions).mockResolvedValue({ dismissed: 2 });
    vi.mocked(reopenSuggestion)
      .mockResolvedValueOnce({} as never)
      .mockRejectedValueOnce(new ApiError(409, "Der Vorschlag ist nicht mehr offen.", {}));
    renderCard();

    await userEvent.click(await screen.findByRole("button", { name: "Verwerfen" }));
    await vi.waitFor(() => expect(toast).toHaveBeenCalledWith("Verworfen", expect.anything()));
    const options = vi.mocked(toast).mock.calls.find(([text]) => text === "Verworfen")![1] as unknown as {
      action: { onClick: () => void };
    };
    options.action.onClick();

    await vi.waitFor(() => expect(toast.error).toHaveBeenCalledWith("1 von 2 wieder geöffnet"));
  });

  it("shows a compact hint with retry for a server error and nothing when offline", async () => {
    vi.mocked(fetchColonyNextSteps).mockRejectedValue(new ApiError(500, "boom", {}));
    const first = renderCard();

    expect(await screen.findByRole("status")).toHaveTextContent(
      "Die nächsten Schritte konnten nicht geladen werden.",
    );
    expect(screen.getByRole("button", { name: "Erneut versuchen" })).toBeInTheDocument();
    first.unmount();

    vi.mocked(fetchColonyNextSteps).mockRejectedValue(new TypeError("Failed to fetch"));
    const second = renderCard();
    await vi.waitFor(() => expect(fetchColonyNextSteps).toHaveBeenCalledTimes(2));
    await vi.waitFor(() => expect(second.container).toBeEmptyDOMElement());
  });

  it("offline: decision buttons are off with „Nur mit Verbindung“ and the data says since when", async () => {
    vi.mocked(fetchColonyNextSteps).mockResolvedValue(
      colonyStepsFixture({
        steps: [
          stepFixture({
            intent: "HONEY_SUPER",
            title: "Honigraum",
            action: { type: "ACCEPT", suggestionId: "s1" },
          }),
        ],
      }),
    );
    act(() => reportRequestOutcome("network-error"));
    renderCard();

    expect(await screen.findByRole("button", { name: "Übernehmen" })).toBeDisabled();
    expect(screen.getByRole("button", { name: "Verwerfen" })).toBeDisabled();
    expect(screen.getByRole("button", { name: "Übernehmen" })).toHaveAttribute(
      "aria-describedby",
      screen.getByText("Nur mit Verbindung").id,
    );
    expect(screen.getByText(/^Stand: \d{2}\.\d{2}\. \d{2}:\d{2}$/)).toBeInTheDocument();
  });

  it("keeps showing the cached steps when the reload fails at network level", async () => {
    vi.mocked(fetchColonyNextSteps).mockRejectedValue(new TypeError("Failed to fetch"));
    const client = new QueryClient({ defaultOptions: { queries: { retry: false } } });
    client.setQueryData(
      colonyNextStepsKey("c1"),
      colonyStepsFixture({ steps: [stepFixture({ title: "Aus dem Cache" })] }),
    );
    render(
      <QueryClientProvider client={client}>
        <NextStepsCard colonyId="c1" />
      </QueryClientProvider>,
    );

    await waitFor(() => expect(fetchColonyNextSteps).toHaveBeenCalled());
    expect(await screen.findByText("Aus dem Cache")).toBeInTheDocument();
    // Online, but the reload failed: the cached steps say since when.
    expect(await screen.findByText(/^Stand: \d{2}\.\d{2}\. \d{2}:\d{2}$/)).toBeInTheDocument();
  });
});