// BudgetPage and its getting-started card (#400). No jsdom: react-dom/server
// renders in vitest's node environment. The budget is a fake `useBudget()`
// over its real initial state, the path a fake `useOnboarding()` built from the
// real checklist, and the grid is the real BudgetTable. A static render runs
// no effect, so the grid never reports its target here (the report and what
// the page does with it are in BudgetPage.wiring.test.ts). What is pinned is
// where the card sits and what it says before and after the step is checked.
import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
import { renderToStaticMarkup } from "react-dom/server";
import { MemoryRouter } from "react-router-dom";

// The budget, collapse and preference services pull the database: stub the connection.
vi.mock("../services/db", () => ({ getDb: vi.fn(), withTransaction: vi.fn() }));
vi.mock("react-i18next", async () => (await import("../test/i18nMock")).i18nMock());
vi.mock("../components/shared/PageHelp", () => ({ PageHelp: () => null }));

const harness = vi.hoisted(() => ({ budget: null as unknown, onboarding: null as unknown }));

vi.mock("../contexts/OnboardingContext", () => ({ useOnboarding: () => harness.onboarding }));
vi.mock("../hooks/useBudget", async (importOriginal) => ({
  ...(await importOriginal<typeof import("../hooks/useBudget")>()),
  useBudget: () => harness.budget,
}));

import BudgetPage from "./BudgetPage";
import { initialBudgetState, type BudgetState } from "../hooks/useBudget";
import type { OnboardingValue } from "../hooks/useOnboardingChecklist";
import { computeChecklist } from "../utils/onboardingChecklist";
import { nextStep } from "../utils/onboardingPath";
import type { BudgetYearRow, OnboardingCounters } from "../shared/types";

/** Steps 2 to 5 done: the next step is the budget. */
const BUDGET_LEFT: OnboardingCounters = {
  sources: 1,
  imports: 1,
  manualCategorized: 1,
  budgetEntries: 0,
  transactions: 41,
};
/** A first amount saved: every step done. */
const BUDGETED: OnboardingCounters = { ...BUDGET_LEFT, budgetEntries: 1 };

const ROWS: BudgetYearRow[] = [
  {
    category_id: 10,
    category_name: "Logement",
    category_color: "#9ca3af",
    category_type: "expense",
    parent_id: null,
    is_parent: true,
    depth: 0,
    months: Array(12).fill(0) as number[],
    annual: 0,
    previousYearTotal: 0,
  },
  {
    category_id: 11,
    category_name: "Loyer",
    category_color: "#9ca3af",
    category_type: "expense",
    parent_id: 10,
    is_parent: false,
    depth: 1,
    months: Array(12).fill(0) as number[],
    annual: 0,
    previousYearTotal: 0,
  },
];

/** The budget after its first read, with `overrides`. */
function budget(overrides: Partial<BudgetState> = {}) {
  const state: BudgetState = { ...initialBudgetState(), rows: ROWS, totalInDb: 41, ...overrides };
  const noop = vi.fn();
  return new Proxy({ state } as Record<string, unknown>, {
    get: (target, key) => (key in target ? target[key as string] : noop),
  });
}

/** The path latched on /budget (card mode), 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: "/budget",
    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 render = () =>
  renderToStaticMarkup(
    <MemoryRouter initialEntries={["/budget"]}>
      <BudgetPage />
    </MemoryRouter>,
  );

const CARD = 'aria-label="t(onboarding.banner.label)"';
const HIGHLIGHT = 'data-onboarding-highlight="true"';
const DIM = 'class="opacity-50 pointer-events-none"';
const count = (html: string, needle: string) => html.split(needle).length - 1;
/**
 * The card's sentence: the paragraph right after the card's own title, null
 * without one (the empty state below has a title and a paragraph too).
 */
function sentence(html: string): string | null {
  const title = html.indexOf("</h2>", html.indexOf(CARD));
  return html.slice(title).match(/^<\/h2><p [^>]*>(.*?)<\/p>/)?.[1] ?? null;
}

beforeEach(() => {
  harness.budget = budget();
  harness.onboarding = path(BUDGET_LEFT);
  vi.stubGlobal("localStorage", { getItem: () => null, setItem: () => undefined });
});

afterEach(() => {
  vi.unstubAllGlobals();
});

describe("BudgetPage — the step card (#400)", () => {
  it("renders the card first, before the page's heading, at its place in the path", () => {
    const html = render();
    expect(count(html, CARD)).toBe(1);
    expect(html.indexOf(CARD)).toBeLessThan(html.indexOf("<h1"));
    expect(html).toContain("t(onboarding.card.stepOf[n=6,total=6])");
    expect(html).toContain("t(onboarding.checklist.items.budget)");
    expect(html).toContain("t(onboarding.card.skip)");
    // The grid is there, below the card.
    expect(html.indexOf("Logement")).toBeGreaterThan(html.indexOf(CARD));
  });

  it("before the grid reports its target: the title and 'Skip this step', no sentence, no ring", () => {
    const html = render();
    expect(sentence(html)).toBeNull();
    expect(count(html, HIGHLIGHT)).toBe(0);
  });

  it("keeps the card out of the loading dim, which still covers the page", () => {
    harness.budget = budget({ isLoading: true });
    const html = render();
    expect(count(html, DIM)).toBe(1);
    expect(html.indexOf("t(onboarding.card.skip)")).toBeLessThan(html.indexOf(DIM));
    expect(html.indexOf(DIM)).toBeLessThan(html.indexOf("<h1"));
  });

  it("a first amount saved: the card stays, says 'Done.' and ends the path", () => {
    harness.onboarding = path(BUDGETED);
    const html = render();
    expect(count(html, CARD)).toBe(1);
    expect(html).toMatch(/<p role="status"[^>]*>.*t\(onboarding\.card\.done\)/);
    expect(html).toContain("t(onboarding.banner.complete)");
    expect(html).toContain("t(onboarding.banner.openGuide)");
    expect(html).not.toContain("t(onboarding.card.skip)");
    expect(count(html, HIGHLIGHT)).toBe(0);
  });

  it("a profile without transactions: the card above the 'import first' state", () => {
    harness.budget = budget({ rows: [], totalInDb: 0 });
    const html = render();
    expect(html).toContain("t(budget.empty.title)");
    expect(html.indexOf(CARD)).toBeLessThan(html.indexOf("t(budget.empty.title)"));
    expect(html).toContain("t(onboarding.card.skip)");
    expect(sentence(html)).toBeNull();
  });

  it("no card when the path is not in card mode on this page", () => {
    for (const overrides of [
      { mode: "banner" as const, cardPage: null },
      { mode: "none" as const, cardPage: null },
      { mode: "card" as const, cardPage: "/transactions" },
    ]) {
      harness.onboarding = path(BUDGET_LEFT, overrides);
      const html = render();
      expect(html).not.toContain(CARD);
      expect(html).toContain("Logement");
    }
  });
});