// ImportPage and its getting-started card (#398). No jsdom: react-dom/server
// renders in vitest's node environment. The wizard is a fake
// `useImportWizard()` over its real initial state, the path a fake
// `useOnboarding()` built from the real checklist, and the wizard's heavy
// panels are stubbed. What is pinned is the page's wiring: where the card
// sits, what it says at each step, which control carries the one highlight,
// and what waits for the folder to be read (#384).
import { describe, it, expect, vi, beforeEach } from "vitest";
import { renderToStaticMarkup } from "react-dom/server";
import { MemoryRouter } from "react-router-dom";

// Importing the real wizard module (for its initial state) pulls the import
// services, then the database: stub the connection.
vi.mock("../services/db", () => ({ getDb: vi.fn(), withTransaction: vi.fn() }));
vi.mock("react-i18next", () => ({
  useTranslation: () => ({
    t: (k: string, o?: Record<string, unknown>) =>
      o ? `t(${k}[${Object.entries(o).map(([a, b]) => `${a}=${String(b)}`).join(",")}])` : `t(${k})`,
    i18n: { language: "fr" },
  }),
}));

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

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

const { stub } = vi.hoisted(() => ({
  stub: (name: string) => ({ default: () => <i data-stub={name} /> }),
}));
vi.mock("../components/import/ImportHistoryPanel", () => stub("history"));
vi.mock("../components/import/SourceConfigPanel", () => stub("source-config"));
vi.mock("../components/import/FilePreviewTable", () => stub("file-preview"));
vi.mock("../components/import/DuplicateCheckPanel", () => stub("duplicate-check"));
vi.mock("../components/import/ImportConfirmation", () => stub("confirmation"));
vi.mock("../components/shared/PageHelp", () => ({ PageHelp: () => null }));

import ImportPage from "./ImportPage";
import { initialWizardState, type WizardState } from "../hooks/useImportWizard";
import type { OnboardingValue } from "../hooks/useOnboardingChecklist";
import { computeChecklist } from "../utils/onboardingChecklist";
import { nextStep } from "../utils/onboardingPath";
import type { ImportReport, OnboardingCounters, ScannedSource } from "../shared/types";

const ZERO: OnboardingCounters = {
  sources: 0,
  imports: 0,
  manualCategorized: 0,
  budgetEntries: 0,
  transactions: 0,
};
/** Source and import checked (the re-read after a successful import). */
const IMPORTED: OnboardingCounters = { ...ZERO, sources: 1, imports: 1, transactions: 41 };

const SOURCES: ScannedSource[] = ["Desjardins", "Tangerine"].map((name) => ({
  folder_name: name,
  folder_path: `/home/max/Relevés/${name}`,
  files: [],
}));

const report = (importedCount: number): ImportReport => ({
  totalRows: 41,
  importedCount,
  skippedDuplicates: 41 - importedCount,
  errorCount: 0,
  categorizedCount: importedCount,
  uncategorizedCount: 0,
  errors: [],
});

const DUPLICATES = { fileAlreadyImported: false, duplicateRows: [], newRows: [] };

/** The wizard after its mount read, with `overrides`. */
function wizard(overrides: Partial<WizardState> = {}) {
  const state: WizardState = { ...initialWizardState, importFolderLoaded: true, ...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 /import (card mode), as the provider shares it. */
function path(
  counters: OnboardingCounters,
  importFolderSet: boolean,
  overrides: Partial<OnboardingValue> = {},
): OnboardingValue {
  const checklist = computeChecklist(counters, { importFolderSet, 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 render = () =>
  renderToStaticMarkup(
    <MemoryRouter initialEntries={["/import"]}>
      <ImportPage />
    </MemoryRouter>,
  );

const CARD = 'aria-label="t(onboarding.banner.label)"';
const HIGHLIGHT = 'data-onboarding-highlight="true"';
const count = (html: string, needle: string) => html.split(needle).length - 1;

/** The one highlighted control: its tag and its inner markup. */
function highlighted(html: string): { tag: string; inner: string } {
  expect(count(html, HIGHLIGHT)).toBe(1);
  const match = html.match(/<(button|a) [^>]*data-onboarding-highlight="true"[^>]*>(.*?)<\/\1>/);
  expect(match).not.toBeNull();
  return { tag: match![1], inner: match![2] };
}

/**
 * The card's sentence: the paragraph that follows its title. The card always
 * hands `t` its interpolations, so a sentence without any reads `t(key[])`.
 */
const sentence = (html: string) => html.match(/<\/h2><p [^>]*>(.*?)<\/p>/)?.[1] ?? null;

beforeEach(() => {
  harness.wizard = wizard();
  harness.onboarding = path(ZERO, false);
});

describe("ImportPage — the step card (#398)", () => {
  it("renders the card first, before the page's heading", () => {
    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=2,total=6])");
  });

  it("a new profile: 'Choose a folder' is the one target, and the sentence names it", () => {
    const html = render();
    expect(sentence(html)).toBe(
      "t(onboarding.card.import.noFolder[button=t(import.empty.noFolder.cta)])",
    );
    const target = highlighted(html);
    expect(target.tag).toBe("button");
    expect(target.inner).toBe("t(import.empty.noFolder.cta)");
  });

  it("a folder without bank sub-folder: 'Create a sample folder', the folder named by its last segment", () => {
    harness.wizard = wizard({ importFolder: "/home/max/Relevés" });
    harness.onboarding = path(ZERO, true);
    const html = render();
    expect(html).toContain("t(onboarding.card.stepOf[n=3,total=6])");
    expect(sentence(html)).toBe(
      "t(onboarding.card.import.noSources[folder=Relevés,refresh=t(import.empty.refresh),sample=t(import.empty.createSample)])",
    );
    expect(highlighted(html).inner).toBe("t(import.empty.createSample)");
  });

  it("sources found: the first source card", () => {
    harness.wizard = wizard({ importFolder: "/home/max/Relevés", scannedSources: SOURCES });
    harness.onboarding = path(ZERO, true);
    const html = render();
    expect(sentence(html)).toBe("t(onboarding.card.import.sourceList[])");
    const target = highlighted(html);
    expect(target.inner).toContain("Desjardins");
    expect(target.inner).not.toContain("Tangerine");
  });

  it.each([
    ["source-config", "sourceConfig", "import.wizard.preview"],
    ["file-preview", "filePreview", "import.wizard.checkDuplicates"],
    ["duplicate-check", "duplicateCheck", "import.wizard.confirm"],
    ["confirm", "confirm", "import.wizard.import"],
  ] as const)("%s: the next button, the one the sentence names", (step, text, label) => {
    harness.wizard = wizard({
      step,
      importFolder: "/home/max/Relevés",
      scannedSources: SOURCES,
      selectedSource: SOURCES[0],
      duplicateResult: DUPLICATES,
    });
    harness.onboarding = path({ ...ZERO, sources: 0 }, true);
    const html = render();
    expect(html).toContain(`data-stub="${step === "confirm" ? "confirmation" : step}"`);
    expect(sentence(html)).toBe(`t(onboarding.card.import.${text}[button=t(${label})])`);
    const target = highlighted(html);
    expect(target.tag).toBe("button");
    expect(target.inner).toContain(`t(${label})`);
  });

  it("importing: the card says so and points at nothing, though the counters already tick", () => {
    harness.wizard = wizard({ step: "importing", importFolder: "/home/max/Relevés", scannedSources: SOURCES });
    harness.onboarding = path(IMPORTED, true);
    const html = render();
    expect(html).toContain("t(import.progress.title)");
    expect(sentence(html)).toBe("t(onboarding.card.import.importing[])");
    expect(html).not.toContain("t(onboarding.card.done)");
    expect(count(html, HIGHLIGHT)).toBe(0);
  });

  it("the report of an import that added transactions: 'Done.' and the next step", () => {
    harness.wizard = wizard({
      step: "report",
      importFolder: "/home/max/Relevés",
      scannedSources: SOURCES,
      importReport: report(41),
    });
    harness.onboarding = path(IMPORTED, true);
    const html = render();
    expect(html).toMatch(/<p role="status"[^>]*>.*t\(onboarding\.card\.done\)/);
    expect(html).toMatch(/href="\/transactions"[^>]*>t\(onboarding\.card\.next\[step=/);
    expect(html).toContain("t(onboarding.card.stepOf[n=4,total=6])");
    expect(count(html, HIGHLIGHT)).toBe(0);
  });

  it("the report of an import that added nothing: the failure sentence, never 'Done.'", () => {
    harness.wizard = wizard({
      step: "report",
      importFolder: "/home/max/Relevés",
      scannedSources: SOURCES,
      importReport: report(0),
    });
    // Duplicates only: this file brought no transaction, and the step stays
    // checked by the earlier import that brought the ones it duplicates.
    harness.onboarding = path(IMPORTED, true);
    const html = render();
    expect(sentence(html)).toBe("t(onboarding.card.import.failed[])");
    expect(html).not.toContain("t(onboarding.card.done)");
    expect(html).not.toContain("onboarding.card.next");
  });

  it("after 'Done' on an import that added nothing, the wizard at rest: no 'Done.', step 4 again on the first source card", () => {
    // The file row is written, but the import step only counts a file that
    // brought a transaction: the re-read keeps the step to do (review of #398).
    harness.wizard = wizard({ importFolder: "/home/max/Relevés", scannedSources: SOURCES });
    harness.onboarding = path({ ...ZERO, sources: 1 }, true);
    const html = render();
    expect(html).toContain("t(onboarding.card.stepOf[n=4,total=6])");
    expect(html).not.toContain("t(onboarding.card.done)");
    expect(sentence(html)).toBe("t(onboarding.card.import.sourceList[])");
    const target = highlighted(html);
    expect(target.inner).toContain("Desjardins");
    expect(target.inner).not.toContain("Tangerine");
  });

  it("after 'Done' or 'Cancel', the wizard at rest: the card still says 'Done.' and points at nothing", () => {
    harness.wizard = wizard({ importFolder: "/home/max/Relevés", scannedSources: SOURCES });
    harness.onboarding = path(IMPORTED, true);
    const html = render();
    expect(html).toContain("t(onboarding.card.done)");
    expect(html).toContain("Desjardins");
    expect(count(html, HIGHLIGHT)).toBe(0);
  });

  it("without the card on screen, no control is highlighted", () => {
    harness.wizard = wizard({ importFolder: "/home/max/Relevés", scannedSources: SOURCES });
    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(ZERO, true, overrides);
      const html = render();
      expect(html).not.toContain(CARD);
      expect(count(html, HIGHLIGHT)).toBe(0);
      expect(html).toContain("Desjardins");
    }
  });
});

describe("ImportPage — before the folder is read (#384)", () => {
  it("shows neither variant of the empty state, nor the list's empty box, nor the card", () => {
    harness.wizard = wizard({ importFolderLoaded: false });
    const html = render();
    expect(html).not.toContain("import.empty.noFolder.title");
    expect(html).not.toContain("import.empty.noSources.title");
    expect(html).not.toContain("import.sources.empty");
    expect(html).not.toContain(CARD);
    expect(count(html, HIGHLIGHT)).toBe(0);
    // The page itself is there: its heading, the folder card and the history.
    expect(html).toContain("t(import.title)");
    expect(html).toContain('data-stub="history"');
  });

  it("shows the empty state once read", () => {
    expect(render()).toContain("t(import.empty.noFolder.title)");
  });
});