// @vitest-environment jsdom
//
// The honest states of the sign-in card (E9.5 S4). Two things are under test and they share a root:
// a screen that does not name the address it is talking about hides an alias mismatch. On 2026-09-03
// a registration as `np.temu@gmail.com` met a Google claim of `nptemu@gmail.com` and every screen in
// the funnel stayed silent about it.
//
// entryUrl snapshots window.location at IMPORT time, so the access-notice cases reset the module
// registry and set the URL before importing — that is the behaviour under test, not a workaround.
import { describe, it, expect, afterEach, vi } from "vitest";
import { render, screen, fireEvent, cleanup, act } from "@testing-library/react";
import type { VerifyEntry } from "../lib/useVerifyEntry";

const noVerify: VerifyEntry = { outcome: null, email: null, dismiss: () => {} };

afterEach(() => {
  cleanup();
  vi.resetModules();
  vi.restoreAllMocks();
  window.history.replaceState(null, "", "/");
});

/** Mount the real card at a given entry URL, with i18n as a key-passthrough and /auth/* stubbed. */
async function mountCard(url: string, apiOverrides: Record<string, unknown> = {}) {
  window.history.replaceState(null, "", url);
  vi.resetModules();
  vi.doMock("react-i18next", async (importOriginal) => {
    const actual = await importOriginal<typeof import("react-i18next")>();
    return {
      ...actual,
      useTranslation: () => ({
        t: (key: string, opts?: Record<string, unknown>) =>
          opts && typeof opts.contact === "string" ? `${key}:${opts.contact}` : key,
        i18n: { language: "en" },
      }),
    };
  });
  vi.doMock("../lib/api", async (importOriginal) => {
    const actual = await importOriginal<typeof import("../lib/api")>();
    return {
      ...actual,
      api: {
        ...actual.api,
        authConfig: () => Promise.resolve({ google_enabled: false }),
        ...apiOverrides,
      },
    };
  });
  const { HttpError } = await import("../lib/api");
  const { default: Welcome } = await import("./Welcome");
  await act(async () => {
    render(<Welcome verify={noVerify} />);
  });
  return { HttpError, Welcome };
}

/** Fill the sign-in form and submit it. */
async function signIn(email = "someone@example.com") {
  fireEvent.change(screen.getByPlaceholderText("welcome.auth.email"), { target: { value: email } });
  fireEvent.change(screen.getByPlaceholderText("welcome.auth.password"), {
    target: { value: "correct horse battery" },
  });
  await act(async () => {
    fireEvent.click(screen.getByText("welcome.auth.signinButton"));
  });
}

/** A password-login refusal carrying the server's structured detail. */
function refusal(
  HttpError: typeof import("../lib/api").HttpError,
  detail: Record<string, unknown>,
) {
  return () => Promise.reject(new HttpError(403, "ignored", { code: "login", ...detail }));
}

describe("a refused sign-in becomes a named state", () => {
  it("names the address the account is on, not the one that was typed", async () => {
    const passwordLogin = vi.fn();
    const { HttpError } = await mountCard("/", { passwordLogin });
    passwordLogin.mockImplementation(
      refusal(HttpError, {
        reason: "pending_approval",
        email: "np.temu@gmail.com",
        email_verified: true,
        approved: false,
      }),
    );

    await signIn("nptemu@gmail.com");

    expect(screen.getByText("welcome.auth.blocked.pending_approval.title")).toBeTruthy();
    expect(screen.getByText("np.temu@gmail.com")).toBeTruthy();
    // The password was already proven correct, so the form is not the next step and must be gone —
    // leaving it up would only invite a retry that cannot succeed.
    expect(screen.queryByPlaceholderText("welcome.auth.password")).toBeNull();
  });

  it("reports each gate from its own flag, so an approved-but-unverified account is told the truth", async () => {
    const passwordLogin = vi.fn();
    const { HttpError } = await mountCard("/", { passwordLogin });
    passwordLogin.mockImplementation(
      refusal(HttpError, {
        reason: "email_unverified",
        email: "approved.first@example.com",
        email_verified: false,
        approved: true,
      }),
    );

    await signIn("approved.first@example.com");

    // E9.5 S1 made the two gates order-independent; a screen that assumed a sequence would send this
    // user off to wait for an admin who has already decided.
    expect(screen.getByText("welcome.auth.blocked.gate.emailPending")).toBeTruthy();
    expect(screen.getByText("welcome.auth.blocked.gate.approvalDone")).toBeTruthy();
    expect(screen.getByText("welcome.auth.resendCta")).toBeTruthy();
  });

  it("shows no checklist for a suspension, which is not a gate that opens on its own", async () => {
    const passwordLogin = vi.fn();
    const { HttpError } = await mountCard("/", { passwordLogin });
    passwordLogin.mockImplementation(
      refusal(HttpError, {
        reason: "suspended",
        email: "banned@example.com",
        operator: "ops@example.com",
      }),
    );

    await signIn("banned@example.com");

    expect(screen.getByText("welcome.auth.blocked.suspended.title")).toBeTruthy();
    expect(screen.getByText("welcome.auth.blocked.operator:ops@example.com")).toBeTruthy();
    expect(screen.queryByText("welcome.auth.blocked.gate.emailDone")).toBeNull();
  });

  it("leaves a wrong password as a line under the form, where the form IS the next step", async () => {
    const passwordLogin = vi.fn();
    const { HttpError } = await mountCard("/", { passwordLogin });
    passwordLogin.mockImplementation(() =>
      Promise.reject(new HttpError(401, "localized invalid", { code: "login", reason: "invalid" })),
    );

    await signIn();

    expect(screen.getByText("localized invalid")).toBeTruthy();
    expect(screen.getByPlaceholderText("welcome.auth.password")).toBeTruthy();
  });
});

// Reported 2026-09-05: delete an account, then open its reset link. The card drew the full "set a new
// password" form purely because a `#reset=` fragment was present, and only told the user after they
// had typed one. Opening a dead reset link is ordinary — the token lives an hour, mail is slow, and
// whoever got two mails clicks the older one.
describe("an emailed reset link that is already finished", () => {
  it("refuses to draw a form that cannot succeed", async () => {
    await mountCard("/#reset=dead-token", {
      checkPasswordReset: () => Promise.resolve({ ok: false }),
    });

    expect(screen.getByText("welcome.auth.deadLink.title")).toBeTruthy();
    expect(screen.getByText("welcome.auth.deadLink.cta")).toBeTruthy();
    expect(screen.queryByPlaceholderText("welcome.auth.newPassword")).toBeNull();
  });

  it("draws the form when the link is still good", async () => {
    await mountCard("/#reset=live-token", {
      checkPasswordReset: () => Promise.resolve({ ok: true }),
    });

    expect(screen.getByPlaceholderText("welcome.auth.newPassword")).toBeTruthy();
    expect(screen.queryByText("welcome.auth.deadLink.title")).toBeNull();
  });

  it("takes the form down if the link dies between the check and the submit", async () => {
    const confirmPasswordReset = vi.fn();
    const { HttpError } = await mountCard("/#reset=racing-token", {
      checkPasswordReset: () => Promise.resolve({ ok: true }),
      confirmPasswordReset,
    });
    confirmPasswordReset.mockImplementation(() =>
      Promise.reject(new HttpError(400, "ignored", { code: "reset", reason: "invalid" })),
    );

    fireEvent.change(screen.getByPlaceholderText("welcome.auth.newPassword"), {
      target: { value: "brand new password" },
    });
    await act(async () => {
      fireEvent.click(screen.getByText("welcome.auth.resetButton"));
    });

    expect(screen.getByText("welcome.auth.deadLink.title")).toBeTruthy();
  });

  it("keeps the form up for a too-short password, which costs the link nothing", async () => {
    const confirmPasswordReset = vi.fn();
    const { HttpError } = await mountCard("/#reset=live-token", {
      checkPasswordReset: () => Promise.resolve({ ok: true }),
      confirmPasswordReset,
    });
    confirmPasswordReset.mockImplementation(() =>
      Promise.reject(
        new HttpError(400, "too short", { code: "reset", reason: "weak_password", min: 10 }),
      ),
    );

    fireEvent.change(screen.getByPlaceholderText("welcome.auth.newPassword"), {
      target: { value: "0123456789ab" },
    });
    await act(async () => {
      fireEvent.click(screen.getByText("welcome.auth.resetButton"));
    });

    expect(screen.getByPlaceholderText("welcome.auth.newPassword")).toBeTruthy();
    expect(screen.queryByText("welcome.auth.deadLink.title")).toBeNull();
  });

  it("probes a token once, however many times the card mounts", async () => {
    const checkPasswordReset = vi.fn().mockResolvedValue({ ok: true });
    const { Welcome } = await mountCard("/#reset=counted-token", { checkPasswordReset });

    await act(async () => {
      render(<Welcome verify={noVerify} />);
    });

    // StrictMode double-invokes effects and the shell remounts this card as the session probe
    // settles; four probes per opened link would exhaust the endpoint's per-IP budget in two reloads
    // and silently drop back to drawing the form unchecked.
    expect(checkPasswordReset).toHaveBeenCalledTimes(1);
  });

  it("shows the form when the check itself fails, so a broken probe locks nobody out", async () => {
    await mountCard("/#reset=live-token", {
      checkPasswordReset: () => Promise.reject(new Error("network")),
    });

    expect(screen.getByPlaceholderText("welcome.auth.newPassword")).toBeTruthy();
  });
});

describe("the access-request notice from a denied Google sign-in", () => {
  it("names the address the request was recorded for", async () => {
    await mountCard("/#access=requested&email=nptemu%40gmail.com");

    expect(screen.getByText("welcome.auth.accessRequestedFor")).toBeTruthy();
    expect(screen.getByText("nptemu@gmail.com")).toBeTruthy();
    expect(screen.queryByText("welcome.auth.accessLinked")).toBeNull();
  });

  it("explains the alias when the request is already on file under another spelling", async () => {
    await mountCard(
      "/#access=requested&email=nptemu%40gmail.com&linked=np.temu%2Bsiftlode%40gmail.com",
    );

    expect(screen.getByText("welcome.auth.accessLinked")).toBeTruthy();
    // %2B, not a bare `+`: URLSearchParams reads the latter as a space and would mangle exactly the
    // address family this epic exists to protect.
    expect(screen.getByText("np.temu+siftlode@gmail.com")).toBeTruthy();
  });

  it("falls back to the unnamed notice when the server sent no address", async () => {
    await mountCard("/#access=requested");

    expect(screen.getByText("welcome.auth.accessRequested")).toBeTruthy();
    expect(screen.queryByText("welcome.auth.accessRequestedFor")).toBeNull();
  });
});