/**
 * ReadCap ACTIVE (T03.h) — end-to-end proof that the emulated SDK enforces
 * per-DOCUMENT isolation, driven by per-entity documents + BILATERAL connections.
 *
 * Mirrors exactly what the app does: create an entity document through the REAL
 * registry (`createEntityDoc`), declare its cap policy via
 * `getCaps().open(doc, scope, owner)`, set the current identity, and declare
 * connections as the CURRENT identity's own peers (authenticated, bilateral). The
 * read filter then discriminates:
 *   (a) unconnected principal denied a PROTECTED doc; granted after a BILATERAL
 *       connection; PUBLIC readable throughout — via the ACTIVE ReadCap.
 *   (b) a UNILATERAL / self-declared connection grants NOTHING.
 */
import { test, expect, mock, afterAll } from "bun:test";
import { createEntityDoc, resetRegistryCache } from "../src/store-registry";
import type { RegistrySession } from "../src/store-registry";
import {
  configure,
  configureStoreRegistry,
  resetStoreRegistry,
  resetConfig,
  getCaps,
  resetCaps,
  setCurrentUser,
  declareConnections,
} from "../src/polyfill";
import { filterReadable } from "../src/read-filter";

afterAll(() => {
  resetConfig();
  resetStoreRegistry();
  resetCaps();
  setCurrentUser(null);
});

const SESSION: RegistrySession = { sessionId: "sid", privateStoreId: "PRIV" };

function inject() {
  let n = 0;
  const ng = {
    doc_create: mock(async () => `did:ng:o:doc${++n}`),
    sparql_update: mock(async () => undefined),
    sparql_query: mock(async () => ({ results: { bindings: [] } })),
  };
  configure({ ng: ng as any, useShape: (() => {}) as any });
  configureStoreRegistry({ getSession: async () => SESSION, normalizeUser: (u) => u.trim() });
  resetRegistryCache();
  resetCaps();
  setCurrentUser(null);
  return ng;
}

test("ReadCap active: a private entity doc created via the real registry is hidden from another principal", async () => {
  inject();

  const aliceDoc = await createEntityDoc("alice", "private");
  getCaps().open(aliceDoc, "private", "alice");

  const bobDoc = await createEntityDoc("bob", "public");
  getCaps().open(bobDoc, "public", "bob");

  const items = [
    { "@graph": aliceDoc, "@id": "a1", label: "alice-private" },
    { "@graph": bobDoc, "@id": "b1", label: "bob-public" },
  ];

  expect(filterReadable(items, getCaps(), "bob").map((i) => i["@id"])).toEqual(["b1"]);
  expect(filterReadable(items, getCaps(), "alice").map((i) => i["@id"]).sort()).toEqual(["a1", "b1"]);
  expect(filterReadable(items, getCaps(), null).map((i) => i["@id"])).toEqual(["b1"]);
  expect(getCaps().hasReadPolicy()).toBe(true);
});

// (a) protected hidden while unconnected → revealed after a BILATERAL connection;
//     public readable regardless — all through the ACTIVE ReadCap.
test("(a) PROTECTED doc: hidden unconnected, revealed after BILATERAL connection, PUBLIC always readable", async () => {
  inject();

  const aliceProtected = await createEntityDoc("alice", "protected");
  getCaps().open(aliceProtected, "protected", "alice");
  const alicePublic = await createEntityDoc("alice", "public");
  getCaps().open(alicePublic, "public", "alice");

  const items = [
    { "@graph": aliceProtected, "@id": "p1" },
    { "@graph": alicePublic, "@id": "u1" },
  ];
  const view = (u: string) => filterReadable(items, getCaps(), u).map((i) => i["@id"]).sort();

  // BEFORE any connection: bob sees only the public item.
  expect(view("bob")).toEqual(["u1"]);
  expect(view("alice")).toEqual(["p1", "u1"]);

  // BILATERAL: alice asserts bob AND bob asserts alice → the link materializes and
  // the SDK issues the protected doc's read cap to bob.
  declareConnections(["bob"], "alice");
  declareConnections(["alice"], "bob");

  expect(view("bob")).toEqual(["p1", "u1"]);
  // A third, unconnected principal still sees only the public one.
  expect(view("carol")).toEqual(["u1"]);
});

// (b) A UNILATERAL / self-declared connection must NOT grant protected read.
test("(b) a UNILATERAL / self-declared connection grants NO protected read", async () => {
  inject();

  const aliceProtected = await createEntityDoc("alice", "protected");
  getCaps().open(aliceProtected, "protected", "alice");
  const items = [{ "@graph": aliceProtected, "@id": "p1" }];
  const view = (u: string) => filterReadable(items, getCaps(), u).map((i) => i["@id"]);

  // The ATTACKER (mallory) self-declares a connection to alice — a UNILATERAL
  // assertion authored by mallory. Alice NEVER asserts mallory back.
  declareConnections(["alice"], "mallory");
  expect(view("mallory")).toEqual([]); // still denied — no bilateral link

  // Even if alice connects to bob (a different, legitimate bilateral link),
  // mallory's one-sided assertion still grants nothing.
  declareConnections(["bob"], "alice");
  declareConnections(["alice"], "bob");
  expect(view("mallory")).toEqual([]);
  expect(view("bob")).toEqual(["p1"]);
});