// OnboardingBanner — render tests (#397). No jsdom: react-dom/server renders
// in vitest's node environment for the markup (region, aria-expanded, hrefs),
// and the component is called as a function for what the markup does not
// carry (a link's navigation state, the handlers).
import { describe, it, expect, vi } from "vitest";
import { isValidElement, type ReactElement, type ReactNode } from "react";
import { renderToStaticMarkup } from "react-dom/server";
import { Link, MemoryRouter } from "react-router-dom";

// The shared fake `t` (src/test/i18nMock.ts) marks what it translates, `t(key[options])`: a string that
// skipped `t` would show unmarked.
vi.mock("react-i18next", async () => (await import("../../test/i18nMock")).i18nMock());

import OnboardingBanner, {
  GETTING_STARTED_GUIDE,
  ONBOARDING_BANNER_LIST_ID,
  type OnboardingBannerProps,
} from "./OnboardingBanner";
import OnboardingChecklist from "../dashboard/OnboardingChecklist";
import { computeChecklist } from "../../utils/onboardingChecklist";
import { nextStep } from "../../utils/onboardingPath";
import type { OnboardingCounters } from "../../shared/types";

type AnyElement = ReactElement<Record<string, unknown> & { children?: ReactNode }>;

function find(node: ReactNode, pred: (el: AnyElement) => boolean): AnyElement[] {
  if (Array.isArray(node)) return node.flatMap((n) => find(n, pred));
  if (!isValidElement(node)) return [];
  const el = node as AnyElement;
  return [...(pred(el) ? [el] : []), ...find(el.props.children, pred)];
}

function texts(node: ReactNode): string[] {
  if (Array.isArray(node)) return node.flatMap(texts);
  if (typeof node === "string") return [node];
  if (!isValidElement(node)) return [];
  return texts((node as AnyElement).props.children);
}

const ZERO: OnboardingCounters = {
  sources: 0,
  imports: 0,
  manualCategorized: 0,
  budgetEntries: 0,
  transactions: 0,
};
/** Profile, folder and source done: 3/6, the next step is "import" on /import. */
const THREE_DONE: OnboardingCounters = { ...ZERO, sources: 1 };
/** Up to the import: the next step is "manualCategory" on /transactions. */
const FOUR_DONE: OnboardingCounters = { ...ZERO, sources: 1, imports: 1, transactions: 40 };
const ALL_DONE: OnboardingCounters = {
  sources: 1,
  imports: 1,
  manualCategorized: 1,
  budgetEntries: 1,
  transactions: 40,
};

function bannerProps(
  overrides: Partial<OnboardingBannerProps> = {},
  counters: OnboardingCounters = THREE_DONE,
): OnboardingBannerProps {
  const checklist = computeChecklist(counters, { importFolderSet: true, budgetAllowed: true });
  return {
    mode: checklist.complete ? "complete" : "banner",
    checklist,
    nextStep: nextStep(checklist),
    budgetReady: true,
    listOpen: false,
    onToggleList: vi.fn(),
    onHide: vi.fn(),
    onResume: vi.fn(),
    ...overrides,
  };
}

const markup = (props: OnboardingBannerProps) =>
  renderToStaticMarkup(
    <MemoryRouter>
      <OnboardingBanner {...props} />
    </MemoryRouter>,
  );

const tree = (props: OnboardingBannerProps) => OnboardingBanner(props) as ReactNode;

const buttonNamed = (node: ReactNode, key: string) => {
  const [button] = find(node, (e) => e.type === "button" && texts(e.props.children).includes(`t(${key})`));
  expect(button, `button ${key}`).toBeDefined();
  return button;
};

describe("OnboardingBanner — banner mode (#397)", () => {
  it("is a region named for the path, with the counter, the next step and its link", () => {
    const html = markup(bannerProps());
    expect(html).toContain('role="region"');
    expect(html).toContain('aria-label="t(onboarding.banner.label)"');
    expect(html).toContain("t(onboarding.banner.progress[done=3,total=6])");
    expect(html).toContain("t(onboarding.banner.next)");
    expect(html).toMatch(/<a [^>]*href="\/import"[^>]*>t\(onboarding\.checklist\.items\.import\)/);
    expect(html).toContain("t(onboarding.checklist.hide)");
  });

  it("links the next step to its page with the step's navigation state", () => {
    const [toImport] = find(tree(bannerProps()), (e) => e.type === Link);
    expect(toImport.props.to).toBe("/import");
    expect(toImport.props.state).toEqual({ onboarding: { focus: true } });

    // The manual category opens Transactions in its guided entry too.
    const [toTransactions] = find(tree(bannerProps({}, FOUR_DONE)), (e) => e.type === Link);
    expect(toTransactions.props.to).toBe("/transactions");
    expect(toTransactions.props.state).toEqual({ onboarding: { focus: true, guided: true } });
  });

  it("the counter waits for the Budget entitlement, the next step does not", () => {
    const html = markup(bannerProps({ budgetReady: false }));
    expect(html).not.toContain("onboarding.banner.progress");
    expect(html).toMatch(/href="\/import"/);
  });

  it("folded: 'Show the list' with aria-expanded false, and no list", () => {
    const html = markup(bannerProps());
    expect(html).toMatch(
      new RegExp(`<button [^>]*aria-expanded="false"[^>]*aria-controls="${ONBOARDING_BANNER_LIST_ID}"[^>]*>t\\(onboarding\\.banner\\.showList\\)`),
    );
    expect(html).toContain(`id="${ONBOARDING_BANNER_LIST_ID}"`);
    expect(html).not.toContain("onboarding.checklist.title");
    expect(html).not.toContain("onboarding.banner.hideList");
  });

  it("unfolded: 'Close the list' with aria-expanded true, and the detailed list in place", () => {
    const html = markup(bannerProps({ listOpen: true }));
    expect(html).toMatch(/<button [^>]*aria-expanded="true"[^>]*>t\(onboarding\.banner\.hideList\)/);
    expect(html).not.toContain("onboarding.banner.showList");
    const container = html.indexOf(`id="${ONBOARDING_BANNER_LIST_ID}"`);
    expect(container).toBeGreaterThan(-1);
    expect(html.indexOf("t(onboarding.checklist.title)")).toBeGreaterThan(container);
    for (const key of ["profile", "importFolder", "source", "import", "manualCategory", "budget"]) {
      expect(html).toContain(`t(onboarding.checklist.items.${key})`);
    }
  });

  it("the unfolded list is the detailed list, wired to the path", () => {
    const props = bannerProps({ listOpen: true });
    const [list] = find(tree(props), (e) => e.type === OnboardingChecklist);
    expect(list.props.items).toBe(props.checklist!.items);
    expect(list.props.done).toBe(3);
    expect(list.props.total).toBe(6);
    expect(list.props.budgetReady).toBe(true);
    expect(list.props.onHide).toBe(props.onHide);
    expect(list.props.onResume).toBe(props.onResume);
    expect(find(tree(bannerProps()), (e) => e.type === OnboardingChecklist)).toHaveLength(0);
  });

  it("'Show the list' toggles the list and 'Hide' hides the path", () => {
    const props = bannerProps();
    const node = tree(props);
    (buttonNamed(node, "onboarding.banner.showList").props.onClick as () => void)();
    expect(props.onToggleList).toHaveBeenCalledTimes(1);
    expect(props.onHide).not.toHaveBeenCalled();
    (buttonNamed(node, "onboarding.checklist.hide").props.onClick as () => void)();
    expect(props.onHide).toHaveBeenCalledTimes(1);
  });

  it("sits in the page flow, never fixed over the page (D1)", () => {
    const root = tree(bannerProps()) as AnyElement;
    expect(root.props.role).toBe("region");
    expect(String(root.props.className)).not.toMatch(/\b(fixed|sticky|absolute)\b/);
  });
});

describe("OnboardingBanner — end of the path (D4)", () => {
  it("says the path is complete, opens the guide's getting-started section and offers 'Close'", () => {
    const props = bannerProps({}, ALL_DONE);
    expect(props.mode).toBe("complete");
    const html = markup(props);
    expect(html).toContain('aria-label="t(onboarding.banner.label)"');
    expect(html).toContain("t(onboarding.banner.complete)");
    expect(GETTING_STARTED_GUIDE).toBe("/settings/users#gettingStarted");
    expect(html).toMatch(/<a [^>]*href="\/settings\/users#gettingStarted"[^>]*>t\(onboarding\.banner\.openGuide\)/);
    expect(html).toContain("t(common.close)");
    expect(html).not.toContain("onboarding.banner.progress");
    expect(html).not.toContain("onboarding.banner.next");
    expect(html).not.toContain("aria-expanded");
    expect(html).not.toContain("onboarding.checklist.hide");
  });

  it("'Close' hides the path", () => {
    const props = bannerProps({}, ALL_DONE);
    (buttonNamed(tree(props), "common.close").props.onClick as () => void)();
    expect(props.onHide).toHaveBeenCalledTimes(1);
  });

  it("shows no list at the end, even if it was unfolded", () => {
    const html = markup(bannerProps({ listOpen: true }, ALL_DONE));
    expect(html).not.toContain("onboarding.checklist.title");
  });
});

describe("OnboardingBanner — nothing to show", () => {
  it("renders nothing in mode none, nor on a page that carries a step card", () => {
    expect(markup(bannerProps({ mode: "none" }))).toBe("");
    expect(markup(bannerProps({ mode: "card" }))).toBe("");
  });

  it("renders nothing without a checklist", () => {
    expect(markup(bannerProps({ checklist: null, nextStep: null }))).toBe("");
  });
});