// OnboardingStepCard — the connected card's wiring (#398, #409).
//
// renderToStaticMarkup runs no effect, so the focus move would stay unguarded.
// React's hooks come from the shared harness (src/test/hookHarness.ts): the
// card runs as a plain function, its refs survive from one call to the next as
// they would between two renders of a mounted component, and `commit()` runs
// its effect when one of its dependencies changed, as React does. The router
// and the path are faked.
import { describe, it, expect, vi, beforeEach } from "vitest";
import type { ReactElement } from "react";

vi.mock("react", async (orig) => (await import("../../test/hookHarness")).fakeReact(await orig()));
const ctx = vi.hoisted(() => ({
  location: { pathname: "/import", state: null as unknown, key: "arrival-1" },
  navigate: vi.fn(),
  onboarding: null as unknown,
}));
vi.mock("react-router-dom", async (importOriginal) => ({
  ...(await importOriginal<typeof import("react-router-dom")>()),
  useLocation: () => ctx.location,
  useNavigate: () => ctx.navigate,
}));
vi.mock("../../contexts/OnboardingContext", () => ({ useOnboarding: () => ctx.onboarding }));

import { hookHarness } from "../../test/hookHarness";
import OnboardingStepCard from "./OnboardingStepCard";
import StepCard, { type StepCardProps } from "./StepCard";
import { computeChecklist } from "../../utils/onboardingChecklist";
import { nextStep, type StepCardModel } from "../../utils/onboardingPath";
import type { OnboardingValue } from "../../hooks/useOnboardingChecklist";
import type { OnboardingCounters } from "../../shared/types";

const harness = hookHarness();

const ZERO: OnboardingCounters = {
  sources: 0,
  imports: 0,
  manualCategorized: 0,
  budgetEntries: 0,
  transactions: 0,
};
/** Folder chosen, no source yet: the next step is the source step, on /import. */
const FOLDER_SET = ZERO;
/** Source and import done: the next step is the manual category, on /transactions. */
const IMPORTED: OnboardingCounters = { ...ZERO, sources: 1, imports: 1, transactions: 41 };

/** The path latched on /import, as the provider shares it. */
function path(counters: OnboardingCounters, overrides: Partial<OnboardingValue> = {}): OnboardingValue {
  const checklist = computeChecklist(counters, { importFolderSet: true, budgetAllowed: true });
  return {
    status: "ready",
    checklist,
    counters,
    hidden: false,
    budgetReady: true,
    nextStep: nextStep(checklist),
    mode: "card",
    cardPage: "/import",
    hide: vi.fn(async () => undefined),
    show: vi.fn(async () => undefined),
    skip: vi.fn(async () => undefined),
    resume: vi.fn(async () => undefined),
    refresh: vi.fn(async () => undefined),
    ...overrides,
  };
}

const SOURCE_LIST: StepCardModel = { text: { key: "onboarding.card.import.sourceList" }, done: false };
const DONE: StepCardModel = { text: null, done: true };

/** One render of the mounted card: its hooks are called in the same order each time. */
function render(model: StepCardModel | null = SOURCE_LIST): ReactElement<StepCardProps> | null {
  return harness.render(() => OnboardingStepCard({ model }) as ReactElement<StepCardProps> | null);
}

/** The card's title ref: its first hook. */
const titleRef = () => harness.slots[0] as { current: unknown };

/** The title the card's ref points at, once React would have attached it. */
function attachTitle(): { focus: ReturnType<typeof vi.fn> } {
  const title = { focus: vi.fn() };
  titleRef().current = title;
  return title;
}

/** The commit of the last render: its effect runs if one of its dependencies changed. */
const commit = () => harness.commit();

beforeEach(() => {
  harness.clear();
  ctx.location = { pathname: "/import", state: null, key: "arrival-1" };
  ctx.navigate.mockReset();
  ctx.onboarding = path(FOLDER_SET);
});

describe("OnboardingStepCard — when it shows (#398)", () => {
  it("renders the card in card mode, latched on the current route", () => {
    const card = render();
    expect(card).not.toBeNull();
    expect(card!.type).toBe(StepCard);
  });

  it("renders nothing in another mode, on a route that is not the latched one, or without a model", () => {
    for (const mode of ["none", "banner", "complete"] as const) {
      ctx.onboarding = path(FOLDER_SET, { mode });
      expect(render(), mode).toBeNull();
    }
    ctx.onboarding = path(FOLDER_SET, { cardPage: "/transactions" });
    expect(render()).toBeNull();
    ctx.onboarding = path(FOLDER_SET);
    expect(render(null)).toBeNull();
  });

  it("stays once the page's steps are done: the latch keeps it, not the next step", () => {
    ctx.onboarding = path(IMPORTED);
    const value = ctx.onboarding as OnboardingValue;
    expect(value.nextStep?.to).toBe("/transactions");
    const card = render(DONE);
    expect(card).not.toBeNull();
    expect(card!.props.done).toBe(true);
  });
});

describe("OnboardingStepCard — what it hands the card (#398)", () => {
  it("the step it shows, its place among the unlocked rows, the model's sentence and verdict", () => {
    const props = render()!.props;
    expect(props.step.key).toBe("source");
    expect(props.position).toEqual({ n: 3, total: 6 });
    expect(props.text).toBe(SOURCE_LIST.text);
    expect(props.done).toBe(false);
    expect(props.titleRef).toBe(titleRef());
  });

  it("the next step once done, and a wait while the next step is still on this page", () => {
    ctx.onboarding = path(IMPORTED);
    expect(render(DONE)!.props.next).toEqual({
      kind: "step",
      step: (ctx.onboarding as OnboardingValue).nextStep,
    });
    // Before the re-read, the next step is still the source step, on /import.
    ctx.onboarding = path(FOLDER_SET);
    expect(render(DONE)!.props.next).toEqual({ kind: "wait" });
  });

  it("no 'Step n of N' until the Budget entitlement is known", () => {
    ctx.onboarding = path(FOLDER_SET, { budgetReady: false });
    expect(render()!.props.position).toBeNull();
  });

  it("'Skip this step' skips the step the card shows; 'Close' hides the path", () => {
    const value = ctx.onboarding as OnboardingValue;
    const props = render()!.props;
    props.onSkip();
    expect(value.skip).toHaveBeenCalledWith("source");
    expect(value.hide).not.toHaveBeenCalled();
    props.onHide();
    expect(value.hide).toHaveBeenCalledTimes(1);
  });
});

describe("OnboardingStepCard — the focus after 'Next step' (#398)", () => {
  const ARRIVAL = { onboarding: { focus: true } };

  it("moves the focus to the title, then consumes the navigation state", () => {
    ctx.location = { ...ctx.location, state: ARRIVAL };
    render();
    const title = attachTitle();
    commit();
    expect(title.focus).toHaveBeenCalledTimes(1);
    expect(ctx.navigate).toHaveBeenCalledTimes(1);
    expect(ctx.navigate).toHaveBeenCalledWith("/import", { replace: true, state: null });
    expect(vi.mocked(ctx.navigate).mock.invocationCallOrder[0]).toBeGreaterThan(
      title.focus.mock.invocationCallOrder[0],
    );
  });

  it("does it once per arrival: StrictMode's second run and later renders do nothing", () => {
    ctx.location = { ...ctx.location, state: ARRIVAL };
    render();
    const title = attachTitle();
    commit();
    harness.replayEffects();
    render();
    commit();
    expect(title.focus).toHaveBeenCalledTimes(1);
    expect(ctx.navigate).toHaveBeenCalledTimes(1);

    // A new arrival on the same mounted page asks again.
    ctx.location = { ...ctx.location, key: "arrival-2" };
    render();
    commit();
    expect(title.focus).toHaveBeenCalledTimes(2);
    expect(ctx.navigate).toHaveBeenCalledTimes(2);
  });

  it("waits for the card to show before focusing and consuming", () => {
    ctx.location = { ...ctx.location, state: ARRIVAL };
    expect(render(null)).toBeNull();
    commit();
    expect(ctx.navigate).not.toHaveBeenCalled();

    render();
    const title = attachTitle();
    commit();
    expect(title.focus).toHaveBeenCalledTimes(1);
    expect(ctx.navigate).toHaveBeenCalledTimes(1);
  });

  it("an ordinary visit, without navigation state or with a malformed one, does nothing and does not fail", () => {
    for (const state of [null, undefined, "focus", { onboarding: "focus" }, { onboarding: { focus: "yes" } }]) {
      // A fresh mount per visit: its effect runs at its first commit.
      harness.clear();
      ctx.location = { ...ctx.location, state };
      render();
      const title = attachTitle();
      expect(() => commit()).not.toThrow();
      expect(title.focus).not.toHaveBeenCalled();
    }
    expect(ctx.navigate).not.toHaveBeenCalled();
  });
});