import assert from "node:assert/strict";
import test from "node:test";
import vm from "node:vm";
import { readFile } from "node:fs/promises";

const workerSource = await readFile(new URL("../public/sw.js", import.meta.url), "utf8");
const sourceId = "4599d348-e053-4937-987d-1392746fb2ce", otherSource = "550caef2-b4bc-482c-bd9f-58045ed0a8a8";
const payload = (cursor = "5", extra = {}) => ({ version: 1, kind: "message", sourceId, messageId: `outbound:${cursor}`, cursor,
  title: "Sybil Agent", body: "You have a new message.", url: "/?agent=root", tag: `sybil-agent:${sourceId}`, ...extra });
function idb(records) {
  const request = value => { const result = {}; queueMicrotask(() => { result.result = structuredClone(value); result.onsuccess?.(); }); return result; };
  return { open() {
    const opening = {};
    queueMicrotask(() => {
      opening.result = { close() {}, transaction() {
        const transaction = { objectStore: () => ({
          get: key => request(records.get(key)), getAll: () => request([...records.values()]),
          put: value => records.set(value.sourceId, structuredClone(value)), delete: key => records.delete(key),
        }) };
        setImmediate(() => transaction.oncomplete?.()); return transaction;
      } };
      opening.onsuccess?.();
    }); return opening;
  } };
}
function fixture(sharedRecords = new Map()) {
  const handlers = new Map(), shown = [], notifications = [], routes = [], messages = [], fetches = [];
  const normalClient = { id: "client", type: "window", url: "https://sybil.example.test/?chat=somewhere", postMessage: value => messages.push(value),
    navigate: async url => { routes.push(["navigate", url]); return normalClient; }, focus: async () => { routes.push(["focus"]); return normalClient; } };
  let windows = [normalClient];
  const makeNotification = value => {
    const notification = { tag: value.tag, data: value.data, closed: false, close() { notification.closed = true; } };
    notifications.push(notification); return notification;
  };
  const self = {
    addEventListener: (name, handler) => handlers.set(name, handler), skipWaiting() {}, location: { origin: "https://sybil.example.test" },
    clients: { claim: async () => undefined, matchAll: async () => windows,
      get: async id => windows.find(client => client.id === id), openWindow: async url => { routes.push(["open", url]); } },
    registration: {
      showNotification: async (title, options) => {
        shown.push({ title, ...structuredClone(options) });
        for (const notification of notifications) if (notification.tag === options.tag) notification.close();
        makeNotification(options);
      },
      getNotifications: async ({ tag } = {}) => notifications.filter(value => !value.closed && (!tag || value.tag === tag)),
    },
  };
  vm.runInNewContext(workerSource, { self, indexedDB: idb(sharedRecords), URL, Date, Promise, BigInt,
    fetch: async request => { fetches.push(request); throw new Error("Network blocked in worker tests"); }, Request });
  const emit = async (type, properties = {}) => {
    const waits = []; handlers.get(type)?.({ ...properties, waitUntil: value => waits.push(value) }); await Promise.all(waits);
  };
  return { shown, notifications, routes, messages, fetches, records: sharedRecords, makeNotification,
    push: value => emit("push", { data: { text: () => typeof value === "string" ? value : JSON.stringify(value) } }),
    click: notification => emit("notificationclick", { notification }),
    message: (data, id = "client") => emit("message", { data, source: { id }, ports: [] }),
    emit, windows: value => { windows = value; }, normalClient,
  };
}

test("actual worker push handler shows fixed generic notification and never fetches credentials", async () => {
  const f = fixture(); await f.push(payload());
  assert.equal(f.shown.length, 1); assert.equal(f.shown[0].title, "Sybil Agent"); assert.equal(f.shown[0].body, "You have a new message.");
  assert.deepEqual(f.shown[0].data, { version: 1, kind: "message", sourceId, messageId: "outbound:5", cursor: "5" });
  assert.equal(f.shown[0].tag, `sybil-agent:${sourceId}`); assert.equal(f.shown[0].renotify, false);
  assert.deepEqual(f.fetches, []); assert.ok(!JSON.stringify([...f.records]).includes("token"));
});

test("every valid message push remains visible, including read or duplicate deliveries; stale payload never regresses identity", async () => {
  const records = new Map(), f = fixture(records);
  await f.message({ type: "sybil-agent-read", version: 1, sourceId, cursor: "10" });
  await f.push(payload("8")); await f.push(payload("8")); await f.push(payload("5"));
  assert.equal(f.shown.length, 3, "Safari visibility requirement is preserved");
  assert.ok(f.shown.every(notification => notification.data.cursor === "8"));
  const restarted = fixture(records); await restarted.push(payload("6"));
  assert.equal(restarted.shown[0].data.cursor, "8");
  assert.equal(records.get(sourceId).readCursor, "10");
});

test("malformed/unexpected payloads cannot supply text, destinations, cross-source tags or silent read pushes", async () => {
  const f = fixture();
  for (const value of ["not-json", "x".repeat(5000), payload("1", { title: "sensitive text" }), payload("1", { body: "transcript" }),
    payload("1", { url: "https://evil.example/" }), payload("1", { tag: "some-other-app" }), payload("-1"), payload("9007199254740992"),
    payload("1", { sourceId: "../../bad" }), payload("1", { messageId: "<script>" }), { version: 1, kind: "read_state", sourceId, readCursor: "8" }]) await f.push(value);
  assert.equal(f.shown.length, 0); assert.equal(f.fetches.length, 0);
});

test("authenticated page read sync closes only owned matching source at or below monotonic read cursor", async () => {
  const f = fixture();
  const older = f.makeNotification({ tag: `sybil-agent:${sourceId}`, data: payload("4") });
  const newer = f.makeNotification({ tag: `sybil-agent:${sourceId}`, data: payload("8") });
  const different = f.makeNotification({ tag: `sybil-agent:${otherSource}`, data: payload("1", { sourceId: otherSource }) });
  const unrelated = f.makeNotification({ tag: "calendar", data: payload("1") });
  const read = { type: "sybil-agent-read", version: 1, sourceId, cursor: "5" };
  await f.message(read, "unknown-client"); assert.equal(older.closed, false);
  f.windows([{ ...f.normalClient, id: "foreign", url: "https://evil.example/" }]);
  await f.message(read, "foreign"); assert.equal(older.closed, false);
  f.windows([f.normalClient]); await f.message(read); await f.message({ ...read, cursor: "2" });
  assert.equal(older.closed, true); assert.equal(newer.closed, false); assert.equal(different.closed, false); assert.equal(unrelated.closed, false);
  assert.equal(f.records.get(sourceId).readCursor, "5");
  await f.message({ ...read, cursor: "8" }); assert.equal(newer.closed, true);
});

test("notification click closes and navigates a same-origin client using fixed root URL, without marking read", async () => {
  const f = fixture(); await f.push(payload());
  const notification = f.notifications[0]; notification.data.url = "https://evil.example/";
  await f.click(notification);
  assert.equal(notification.closed, true);
  assert.deepEqual(f.routes, [["navigate", "https://sybil.example.test/?agent=root"], ["focus"]]);
  assert.equal(f.records.get(sourceId).readCursor, undefined);
  f.windows([{ ...f.normalClient, url: "https://evil.example/" }]); await f.click(notification);
  assert.deepEqual(f.routes.at(-1), ["open", "https://sybil.example.test/?agent=root"]);
});

test("logout closes only owned alerts and subscription change asks pages to re-register without network or secrets", async () => {
  const f = fixture(); await f.push(payload());
  const unrelated = f.makeNotification({ tag: "another-app", data: payload() });
  await f.message({ type: "sybil-agent-logout", version: 1 });
  assert.equal(f.notifications[0].closed, true); assert.equal(unrelated.closed, false);
  await f.emit("pushsubscriptionchange");
  assert.equal(f.messages.at(-1).type, "sybil-push-subscription-changed");
  assert.deepEqual(f.fetches, []);
});

test("worker bounds durable source metadata", async () => {
  const f = fixture();
  for (let index = 0; index < 20; index++) await f.message({ type: "sybil-agent-read", version: 1, sourceId: `4599d348-e053-4937-987d-${String(index).padStart(12, "0")}`, cursor: "1" });
  assert.equal(f.records.size, 16);
});