// @vitest-environment jsdom

import type { JSX } from "solid-js";
import { readFileSync } from "node:fs";
import { afterEach, describe, expect, it, vi } from "vitest";
import { ONBOARDING_CARD_STORAGE_KEY, ONBOARDING_LAST_CARD, Onboarding } from "./Onboarding";
import { AdoptVaultView } from "./AdoptVaultView";
import { flushView, inputText, renderView } from "./view-test-utils";

vi.mock("@zxcvbn-ts/core", () => ({
  zxcvbn: (value: string) => ({ score: value.length >= 16 ? 4 : 1 }),
  zxcvbnOptions: { setOptions: vi.fn() },
}));
vi.mock("@zxcvbn-ts/language-common", () => ({
  adjacencyGraphs: {},
  dictionary: {},
}));
vi.mock("@zxcvbn-ts/language-en", () => ({
  translations: {},
  dictionary: {},
}));

function button(container: HTMLElement, text: string): HTMLButtonElement {
  const found = Array.from(container.querySelectorAll("button")).find((b) =>
    (b.textContent ?? "").includes(text),
  );
  if (!found) throw new Error(`button not found: ${text}`);
  return found as HTMLButtonElement;
}

async function enterStrongPassword(container: HTMLElement) {
  inputText(container.querySelector("#adopt-password") as HTMLInputElement, "9xQ!vZ2pLm74Tr#Ke8Wd5Bn");
  inputText(container.querySelector("#adopt-confirm-password") as HTMLInputElement, "9xQ!vZ2pLm74Tr#Ke8Wd5Bn");
  await flushView();
}

describe("vault adoption onboarding", () => {
  const cleanups: Array<() => void> = [];

  afterEach(() => {
    vi.useRealTimers();
    while (cleanups.length) cleanups.pop()!();
  });

  function mounted(view: () => JSX.Element) {
    const rendered = renderView(view);
    cleanups.push(rendered.dispose);
    return rendered;
  }

  it("T-A21: Onboarding separates pairing from backup restore", () => {
    vi.useFakeTimers();
    const onComplete = vi.fn();
    const onRestore = vi.fn();
    const onAdopt = vi.fn();
    const view = mounted(() => <Onboarding onComplete={onComplete} onRestore={onRestore} onAdopt={onAdopt} />);

    button(view.container, "next").click();
    vi.advanceTimersByTime(220);
    button(view.container, "next").click();
    vi.advanceTimersByTime(220);

    expect(view.container.textContent).toContain("Create vault");
    expect(view.container.textContent).toContain("Already using Peach?");
    expect(view.container.textContent).toContain("Pair with another device");
    expect(view.container.textContent).toContain("Scan a QR and confirm one 8-digit code.");
    expect(view.container.textContent).toContain("Restore a backup");
    button(view.container, "Pair with another device").click();
    expect(onAdopt).toHaveBeenCalledTimes(1);
  });

  it("T-A21c: resumes on the final card when re-entered from a leave flow", async () => {
    const onComplete = vi.fn();
    const view = mounted(() => (
      <Onboarding onComplete={onComplete} onRestore={() => {}} onAdopt={() => {}} initialCard={ONBOARDING_LAST_CARD} />
    ));

    // Landing straight on the final card shows the exit actions, not card 0.
    expect(view.container.textContent).toContain("Create vault");
    expect(view.container.textContent).toContain("Already using Peach?");
    expect(view.container.textContent).not.toContain("Two keys.");

    // Back (matched by class — the "Restore a backup" label also contains the
    // substring "back") still responds and steps to the previous card.
    (view.container.querySelector(".peach-onboarding-back") as HTMLButtonElement).click();
    expect(view.container.querySelector(".peach-onboarding-card")?.classList.contains("is-exiting")).toBe(true);
    await new Promise((r) => setTimeout(r, 300));
    expect(view.container.textContent).toContain("Two keys.");
    expect(view.container.textContent).not.toContain("Create vault");
  });

  it("T-A21d: persists the card on every step so a closed popup resumes mid-onboarding", async () => {
    const original = Object.getOwnPropertyDescriptor(globalThis, "chrome");
    const sets: Array<Record<string, string>> = [];
    try {
      Object.defineProperty(globalThis, "chrome", {
        configurable: true,
        value: {
          storage: {
            local: {
              set: vi.fn(async (obj: Record<string, string>) => {
                sets.push(obj);
              }),
            },
          },
        },
      });

      const view = mounted(() => (
        <Onboarding onComplete={() => {}} onRestore={() => {}} onAdopt={() => {}} />
      ));
      button(view.container, "next").click();
      await new Promise((r) => setTimeout(r, 300));
      (view.container.querySelector(".peach-onboarding-back") as HTMLButtonElement).click();
      await new Promise((r) => setTimeout(r, 300));

      const saved = sets.flatMap((s) => Object.entries(s));
      expect(saved).toContainEqual([ONBOARDING_CARD_STORAGE_KEY, "1"]);
      expect(saved[saved.length - 1]).toEqual([ONBOARDING_CARD_STORAGE_KEY, "0"]);
    } finally {
      if (original) Object.defineProperty(globalThis, "chrome", original);
      else delete (globalThis as { chrome?: unknown }).chrome;
    }
  });

  it("T-A21b: create-vault is the nav call-to-action; a final-card tap does not silently create", () => {
    vi.useFakeTimers();
    const onComplete = vi.fn();
    const view = mounted(() => <Onboarding onComplete={onComplete} onRestore={() => {}} onAdopt={() => {}} />);

    button(view.container, "next").click();
    vi.advanceTimersByTime(220);
    button(view.container, "next").click();
    vi.advanceTimersByTime(220);

    expect(view.container.textContent).toContain("Create vault");

    (view.container.querySelector(".peach-onboarding-card") as HTMLElement).click();
    expect(onComplete).not.toHaveBeenCalled();

    button(view.container, "Create vault").click();
    vi.advanceTimersByTime(250);
    expect(onComplete).toHaveBeenCalledTimes(1);
  });

  it("T-A22: password screen uses the same minimum-length gate as create-vault", () => {
    const view = mounted(() => <AdoptVaultView onCancel={() => {}} onDone={() => {}} />);
    const continueButton = button(view.container, "Continue");
    expect(continueButton.disabled).toBe(true);
    inputText(view.container.querySelector("#adopt-password") as HTMLInputElement, "short");
    inputText(view.container.querySelector("#adopt-confirm-password") as HTMLInputElement, "short");
    expect(view.container.textContent).toContain("need 7 more characters");
    expect(continueButton.disabled).toBe(true);
  });

  it("T-A28: pair phase shows the pairing-request QR after a strong password", async () => {
    const view = mounted(() => <AdoptVaultView onCancel={() => {}} onDone={() => {}} />);
    await enterStrongPassword(view.container);
    button(view.container, "Continue").click();
    await flushView();

    // The browser is the source of the QR now — the phone scans it.
    // We assert the heading + copy; the actual QR is rendered by a background
    // call that's out of scope for a jsdom test (chrome.runtime is undefined).
    expect(view.container.textContent).toContain("Pair a device");
    expect(view.container.textContent).toContain("Scan this QR in Peach");
    expect(view.container.querySelector(".peach-adopt-qr-wrap")).toBeTruthy();
    expect(view.container.querySelectorAll(".peach-adopt-bird-stage .peach-pair-bird")).toHaveLength(2);
    // The scan button from the old flow is gone — the phone is the scanner now.
    expect(view.container.textContent).not.toContain("Enter invitation manually");
  });

  it("pins the compact receiver stage above the shared pairing-stage cascade", () => {
    const css = readFileSync("src/popup/styles/popup.css", "utf8");
    const rule = css.match(
      /\.peach-pair-stage\.peach-adopt-bird-stage\s*\{([^}]*)\}/,
    )?.[1];

    expect(rule).toContain("height: 102px");
    expect(rule).toContain("margin: -6px auto 2px");
    expect(css).toMatch(
      /\.peach-adopt-card--pair\s*\{[^}]*border:\s*0;/s,
    );
  });

  it("shows the receiver SAS and requires explicit confirmation", async () => {
    type RuntimeListener = (msg: { type?: string; payload?: unknown }) => void;
    const listeners: RuntimeListener[] = [];
    Object.defineProperty(globalThis, "chrome", {
      configurable: true,
      value: {
        runtime: {
          lastError: undefined,
          sendMessage(
            message: { type?: string },
            callback: (response: unknown) => void,
          ) {
            if (message.type === "START_ADOPTION_RECEIVER") {
              callback({ ok: true, data: { invitation: "peach-pair-v2:test" } });
            } else {
              callback({ ok: true });
            }
          },
          onMessage: {
            addListener(fn: RuntimeListener) { listeners.push(fn); },
            removeListener(fn: RuntimeListener) {
              const index = listeners.indexOf(fn);
              if (index >= 0) listeners.splice(index, 1);
            },
          },
        },
      },
    });

    const view = mounted(() => <AdoptVaultView onCancel={() => {}} onDone={() => {}} />);
    await enterStrongPassword(view.container);
    button(view.container, "Continue").click();
    await flushView();

    for (const listener of listeners) {
      listener({
        type: "ADOPTION_SOURCE_SAS",
        payload: {
          id: "receiver-sas-id",
          sas: "48219371",
          displayOnly: false,
        },
      });
    }
    await flushView();

    expect(view.container.textContent).toContain("48219371");
    expect(view.container.textContent).toContain("Confirm this 8-digit code");
    expect(view.container.textContent).toContain("complete copy of its vault");
    expect(view.container.textContent).not.toContain("session ID");
    expect(button(view.container, "Confirm code")).toBeTruthy();
    expect(view.container.querySelector(".peach-adoption-sas")).toBeTruthy();
    expect(view.container.querySelector(".peach-pair-qr")).toBeNull();
    expect(view.container.textContent).not.toContain("They match");
    expect(view.container.textContent).not.toContain("They don't match");

    for (const listener of listeners) {
      listener({
        type: "ADOPTION_SOURCE_RESULT",
        payload: { status: "error", error: "ADOPT_PRO_REQUIRED" },
      });
    }
    await flushView();

    expect(view.container.textContent).toContain("Pair freely");
    expect(view.container.textContent).toContain("at least one of these two devices");
    expect(view.container.textContent).toContain("$39 once");
    expect(view.container.querySelector('a[href*="buy.polar.sh"]')).toBeTruthy();
  });

  it("PB-26-607: never renders a raw background error string", async () => {
    type RuntimeListener = (msg: { type?: string; payload?: unknown }) => void;
    const listeners: RuntimeListener[] = [];
    const RAW = "TypeError: cannot read property \"salt\" of undefined at deriveSlotKey (vault.ts:2841)";
    Object.defineProperty(globalThis, "chrome", {
      configurable: true,
      value: {
        runtime: {
          lastError: undefined,
          sendMessage(
            message: { type?: string },
            callback: (response: unknown) => void,
          ) {
            if (message.type === "START_ADOPTION_RECEIVER") {
              callback({ ok: false, error: RAW });
            } else {
              callback({ ok: true });
            }
          },
          onMessage: {
            addListener(fn: RuntimeListener) { listeners.push(fn); },
            removeListener(fn: RuntimeListener) {
              const index = listeners.indexOf(fn);
              if (index >= 0) listeners.splice(index, 1);
            },
          },
        },
      },
    });

    const view = mounted(() => <AdoptVaultView onCancel={() => {}} onDone={() => {}} />);
    await enterStrongPassword(view.container);
    button(view.container, "Continue").click();
    await flushView();

    expect(view.container.textContent).toContain("could not start joining this vault");
    expect(view.container.textContent).not.toContain(RAW);
    expect(view.container.textContent).not.toContain("vault.ts");

    // Same guarantee on the result-push path, which switches to the error phase.
    for (const listener of listeners) {
      listener({ type: "ADOPTION_SOURCE_RESULT", payload: { status: "error", error: RAW } });
    }
    await flushView();

    expect(view.container.textContent).toContain("Could not join the vault.");
    expect(view.container.textContent).toContain("the other device could not finish the transfer");
    expect(view.container.textContent).not.toContain(RAW);
    expect(view.container.textContent).not.toContain("vault.ts");
  });

  it("continues straight to initial sync when receiver pairing completes", async () => {
    type RuntimeListener = (msg: { type?: string; payload?: unknown }) => void;
    const listeners: RuntimeListener[] = [];
    Object.defineProperty(globalThis, "chrome", {
      configurable: true,
      value: {
        runtime: {
          lastError: undefined,
          sendMessage(
            message: { type?: string },
            callback: (response: unknown) => void,
          ) {
            if (message.type === "START_ADOPTION_RECEIVER") {
              callback({ ok: true, data: { invitation: "peach-pair-v2:test" } });
            } else {
              callback({ ok: true });
            }
          },
          onMessage: {
            addListener(fn: RuntimeListener) { listeners.push(fn); },
            removeListener(fn: RuntimeListener) {
              const index = listeners.indexOf(fn);
              if (index >= 0) listeners.splice(index, 1);
            },
          },
        },
      },
    });
    const onDone = vi.fn();
    const view = mounted(() => (
      <AdoptVaultView onCancel={() => {}} onDone={onDone} />
    ));
    await enterStrongPassword(view.container);
    button(view.container, "Continue").click();
    await flushView();
    vi.useFakeTimers();

    for (const listener of listeners) {
      listener({
        type: "ADOPTION_SOURCE_RESULT",
        payload: { status: "complete" },
      });
    }

    expect(onDone).not.toHaveBeenCalled();
    expect(view.container.textContent).toContain("Paired");
    expect(view.container.textContent).toContain("Secure connection established");
    expect(view.container.querySelector(".peach-adopt-bird-stage.act-paired")).toBeTruthy();
    expect(view.container.querySelectorAll(".peach-pair-bird-pose-happy")).toHaveLength(2);
    expect(view.container.querySelector(".peach-adopt-connection")).toBeTruthy();
    expect(view.container.textContent).not.toContain("Joined your vault");
    expect(view.container.textContent).not.toContain("Open Peach");

    vi.advanceTimersByTime(4_999);
    expect(onDone).not.toHaveBeenCalled();
    vi.advanceTimersByTime(1);
    expect(onDone).toHaveBeenCalledOnce();
  });
});