// @vitest-environment jsdom
//
// The emailed verification link, confirmed wherever it is opened. The regression this pins: the token
// used to be consumed inside Welcome.tsx, which App renders ONLY when there is no session — so opening
// the link in a browser that already held a Siftlode session posted nothing, the fragment was then
// stripped, and the user got no signal at all. Incognito worked, which is why it survived.
//
// entryUrl snapshots window.location at IMPORT time, so each case resets the module registry and sets
// the URL before importing — that is the behaviour under test, not a workaround.
import { describe, it, expect, afterEach, vi } from "vitest";
import { render, screen, cleanup, act } from "@testing-library/react";

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

/** Mount the hook at a given entry URL with a stubbed /auth/verify, and hand back what it reported. */
async function mountAt(url: string, verifyEmail: ReturnType<typeof vi.fn>) {
  // Carries whatever state the case set up: history.state is part of what the hook must not destroy.
  window.history.replaceState(window.history.state, "", url);
  vi.resetModules();
  vi.doMock("./api", async (importOriginal) => {
    const actual = await importOriginal<typeof import("./api")>();
    return { ...actual, api: { ...actual.api, verifyEmail } };
  });
  const { useVerifyEntry } = await import("./useVerifyEntry");

  function Probe() {
    const entry = useVerifyEntry();
    return (
      <>
        <div data-testid="outcome">{`${entry.outcome ?? "none"}:${entry.email ?? "-"}`}</div>
        <div data-testid="reset">{entry.resetPending ? "reset-pending" : "-"}</div>
        <button data-testid="dismiss" onClick={entry.dismiss} />
      </>
    );
  }
  await act(async () => {
    render(<Probe />);
  });
  return () => screen.getByTestId("outcome").textContent;
}

describe("confirming an emailed verification link", () => {
  it("posts the fragment token and reports the confirmed address", async () => {
    const verifyEmail = vi.fn().mockResolvedValue({ ok: true, email: "someone@example.com" });

    const outcome = await mountAt("/#verify=tok-123", verifyEmail);

    expect(verifyEmail).toHaveBeenCalledWith("tok-123");
    expect(outcome()).toBe("ok:someone@example.com");
  });

  it("posts exactly once, so a re-render cannot spend the single-use token twice", async () => {
    const verifyEmail = vi.fn().mockResolvedValue({ ok: true, email: "once@example.com" });

    await mountAt("/#verify=tok-once", verifyEmail);

    // A second POST would 400 on the already-consumed token and flip a success to "invalid".
    expect(verifyEmail).toHaveBeenCalledTimes(1);
  });

  it("reports ok_reset when the account's password had been revoked", async () => {
    const verifyEmail = vi
      .fn()
      .mockResolvedValue({ ok: true, password_reset_required: true, email: "revoked@example.com" });

    const outcome = await mountAt("/#verify=tok-reset", verifyEmail);

    expect(outcome()).toBe("ok_reset:revoked@example.com");
  });

  // Errors are built INSIDE the rejection, not hoisted above the test: mountAt calls
  // vi.resetModules(), so an HttpError imported earlier would be a different class identity than the
  // one the hook imports afterwards, and `instanceof` would quietly miss.
  const rejectWith = (make: (E: typeof import("./api/core").HttpError) => unknown) =>
    vi.fn().mockImplementation(async () => {
      const { HttpError } = await import("./api/core");
      throw make(HttpError);
    });

  it("reports invalid when the SERVER says the link is expired or already used", async () => {
    const verifyEmail = rejectWith((E) => new E(400, "verify", { code: "verify" }));

    const outcome = await mountAt("/#verify=tok-dead", verifyEmail);

    expect(outcome()).toBe("invalid:-");
  });

  // DX-16: the fragment is already cleared by the time this resolves, so reporting a transport
  // failure as "that link is no longer valid" pushes the user into requesting a fresh link on the
  // strength of a statement that is false — the token is untouched and retrying it works.
  it("does not call the link dead on a gateway failure mid-deploy", async () => {
    const verifyEmail = rejectWith((E) => new E(502, "Bad Gateway"));

    const outcome = await mountAt("/#verify=tok-live", verifyEmail);

    expect(outcome()).toBe("unreachable:-");
  });

  it("does not call the link dead when the connection drops with no HTTP status at all", async () => {
    const verifyEmail = vi.fn().mockRejectedValue(new TypeError("Failed to fetch"));

    const outcome = await mountAt("/#verify=tok-offline", verifyEmail);

    expect(outcome()).toBe("unreachable:-");
  });

  // A 400 that is not the verify refusal is still not a verdict on the token.
  it("does not call the link dead on a 400 that is not the verify refusal", async () => {
    const verifyEmail = rejectWith((E) => new E(400, "nope", { code: "other" }));

    const outcome = await mountAt("/#verify=tok-other", verifyEmail);

    expect(outcome()).toBe("unreachable:-");
  });

  it("clears the one-time query flags it owns even with nothing to confirm", async () => {
    const verifyEmail = vi.fn();

    const outcome = await mountAt("/?access=requested", verifyEmail);

    expect(verifyEmail).not.toHaveBeenCalled();
    expect(outcome()).toBe("none:-");
    expect(window.location.search).toBe("");
  });

  // Only the signed-out auth card consumes a `#reset=` token, so in a browser that already holds a
  // session nobody reads it — and erasing it turned the link into a dead end with no explanation:
  // the page loads, nothing happens, and clicking it again does the same, because the token is
  // untouched and the session is still there. Leaving it keeps the recovery: signing out reloads
  // with the fragment intact and the reset form is waiting.
  it("leaves an unspent reset link in the address bar", async () => {
    const verifyEmail = vi.fn();

    await mountAt("/?login=out#reset=unspent", verifyEmail);

    expect(window.location.hash).toBe("#reset=unspent");
    expect(window.location.search).toBe(""); // the flag it does own still goes
    expect(screen.getByTestId("reset").textContent).toBe("reset-pending");
  });

  // DX-17: the verify half got a hashchange listener in E9.5 S2, the reset half did not — so pasting
  // a reset link into a tab already running the app was silently ignored. Our mails were plain text
  // until 0.78.8, which makes pasting the normal way to use one.
  it("notices a reset link pasted into a tab that is already running", async () => {
    await mountAt("/", vi.fn());
    expect(screen.getByTestId("reset").textContent).toBe("-");

    await act(async () => {
      window.history.replaceState(window.history.state, "", "/#reset=pasted");
      window.dispatchEvent(new HashChangeEvent("hashchange"));
    });

    expect(screen.getByTestId("reset").textContent).toBe("reset-pending");
  });

  // A reset link can arrive over an unread confirmation (and a slow /auth/verify can resolve after
  // one did), so both states can be set at once. Neither may eat the other: `dismiss` used to clear
  // both, which is how the reset guidance could be destroyed before it was ever rendered.
  it("keeps a pasted reset link and an unread confirmation, and dismisses them one at a time", async () => {
    const verifyEmail = vi.fn().mockResolvedValue({ ok: true, email: "someone@example.com" });

    const outcome = await mountAt("/#verify=tok-first", verifyEmail);
    expect(outcome()).toBe("ok:someone@example.com");

    await act(async () => {
      window.history.replaceState(window.history.state, "", "/#reset=pasted");
      window.dispatchEvent(new HashChangeEvent("hashchange"));
    });

    // Both live: the reset is pending AND the confirmation is still unread.
    expect(screen.getByTestId("reset").textContent).toBe("reset-pending");
    expect(outcome()).toBe("ok:someone@example.com");

    // One dismiss peels the reset guidance and leaves the confirmation standing…
    await act(async () => screen.getByTestId("dismiss").click());
    expect(screen.getByTestId("reset").textContent).toBe("-");
    expect(outcome()).toBe("ok:someone@example.com");

    // …and the next one clears that.
    await act(async () => screen.getByTestId("dismiss").click());
    expect(outcome()).toBe("none:-");
  });

  // This hook runs on the FIRST commit of App, which is several commits before the setup wizard, the
  // ?link=/?oauth= effects and the lazily-loaded module views read their own parameters. It used to
  // blank the whole query and null history.state, which silently broke first-run setup (the wizard
  // found no ?token=) and every signed-in deep link. It must only clear what it owns.
  it("leaves parameters it does not own, and keeps history.state", async () => {
    window.history.replaceState(
      { sfScroll: 42 },
      "",
      "/?token=setup-1&page=plex&v=show:9&login=out",
    );

    await mountAt(window.location.href, vi.fn());

    const params = new URLSearchParams(window.location.search);
    expect(params.get("token")).toBe("setup-1");
    expect(params.get("page")).toBe("plex");
    expect(params.get("v")).toBe("show:9");
    expect(params.get("login")).toBeNull(); // a one-time notice, ours to drop
    expect(window.history.state).toEqual({ sfScroll: 42 });
  });
});

// The link does not always arrive as a page LOAD. Found in UAT on 2026-09-03: navigating a tab that
// already runs the app to a URL differing only in the fragment is a same-document navigation, so
// nothing reloads, the import-time snapshot never sees the token, and it sat unconsumed in the
// address bar — the same silence the sprint set out to remove, wearing a different hat.
describe("a verification link that arrives as a fragment-only navigation", () => {
  it("consumes a token delivered by hashchange, and clears it from the address bar", async () => {
    const verifyEmail = vi.fn().mockResolvedValue({ ok: true, email: "pasted@example.com" });
    const outcome = await mountAt("/", verifyEmail);
    expect(verifyEmail).not.toHaveBeenCalled();

    await act(async () => {
      window.history.replaceState(null, "", "/#verify=pasted-token");
      window.dispatchEvent(new HashChangeEvent("hashchange"));
    });

    expect(verifyEmail).toHaveBeenCalledWith("pasted-token");
    expect(outcome()).toBe("ok:pasted@example.com");
    expect(window.location.hash).toBe("");
  });

  it("replaces a standing outcome rather than leaving the previous banner up", async () => {
    const verifyEmail = vi
      .fn()
      .mockResolvedValueOnce({ ok: true, email: "first@example.com" })
      // The server's own refusal, not a bare Error: only a 400 carrying {code:"verify"} means the
      // token is spent, and this case is about the SECOND outcome replacing the first.
      .mockImplementationOnce(async () => {
        const { HttpError } = await import("./api/core");
        throw new HttpError(400, "verify", { code: "verify" });
      });
    const outcome = await mountAt("/#verify=first-token", verifyEmail);
    expect(outcome()).toBe("ok:first@example.com");

    await act(async () => {
      window.history.replaceState(null, "", "/#verify=spent-token");
      window.dispatchEvent(new HashChangeEvent("hashchange"));
    });

    expect(outcome()).toBe("invalid:-");
  });

  it("posts a given token once even if the same fragment arrives again", async () => {
    const verifyEmail = vi.fn().mockResolvedValue({ ok: true, email: "same@example.com" });
    await mountAt("/#verify=same-token", verifyEmail);

    await act(async () => {
      window.history.replaceState(null, "", "/#verify=same-token");
      window.dispatchEvent(new HashChangeEvent("hashchange"));
    });

    expect(verifyEmail).toHaveBeenCalledTimes(1);
  });
});