// Tests for the invite-link fragment codec.  node test/invite.test.mjs
import assert from "node:assert/strict";
import {
  parseInviteFragment,
  buildInviteFragment,
  hasInviteFingerprint,
  INVITE_PREFIX,
} from "../web/static/invite.js";

let failures = 0;
async function test(name, fn) {
  try {
    await fn();
    console.log("PASS  " + name);
  } catch (e) {
    console.log("FAIL  " + name + "  —  " + (e && e.message));
    failures++;
  }
}

await test("parse: new format without name", () => {
  assert.deepEqual(parseInviteFragment("e1.abc123"), { T: "abc123", name: "", b: "" });
});

await test("parse: new format with name", () => {
  assert.deepEqual(parseInviteFragment("e1.abc123~Paul"), { T: "abc123", name: "Paul", b: "" });
});

await test("parse: legacy unprefixed without name", () => {
  assert.deepEqual(parseInviteFragment("abc123"), { T: "abc123", name: "", b: "" });
});

await test("parse: legacy unprefixed with name", () => {
  assert.deepEqual(parseInviteFragment("abc123~Paul"), { T: "abc123", name: "Paul", b: "" });
});

await test("parse: URL-encoded name", () => {
  assert.deepEqual(parseInviteFragment("e1.abc~Paul%20Campbell"), { T: "abc", name: "Paul Campbell", b: "" });
});

await test("parse: URL-encoded unicode name", () => {
  assert.deepEqual(parseInviteFragment("e1.abc~Zo%C3%AB%20%E2%9C%A8"), { T: "abc", name: "Zoë ✨", b: "" });
});

await test("parse: undecodable percent sequence -> empty name", () => {
  assert.deepEqual(parseInviteFragment("e1.abc~%E0%A4%A"), { T: "abc", name: "", b: "" });
});

await test("parse: empty input", () => {
  assert.deepEqual(parseInviteFragment(""), { T: "", name: "", b: "" });
});

await test("parse: null/undefined input", () => {
  assert.deepEqual(parseInviteFragment(null), { T: "", name: "", b: "" });
  assert.deepEqual(parseInviteFragment(undefined), { T: "", name: "", b: "" });
});

await test("build: carries the fingerprint", () => {
  assert.equal(buildInviteFragment("abc123"), INVITE_PREFIX + "abc123");
  assert.ok(hasInviteFingerprint(buildInviteFragment("abc123", "Paul")));
});

await test("build: round-trips without name", () => {
  assert.deepEqual(parseInviteFragment(buildInviteFragment("abc123")), { T: "abc123", name: "", b: "" });
});

await test("build: round-trips with name", () => {
  assert.deepEqual(parseInviteFragment(buildInviteFragment("abc123", "Paul Campbell")), {
    T: "abc123",
    name: "Paul Campbell",
    b: "",
  });
});

await test("build: round-trips a unicode name (incl. ~ in the name)", () => {
  // "~" in a name must survive: encodeURIComponent leaves it bare, but the
  // parser splits on the FIRST tilde, so the separator still wins.
  assert.deepEqual(parseInviteFragment(buildInviteFragment("T", "Zoë ~ ✨")), { T: "T", name: "Zoë ~ ✨", b: "" });
});

await test("hasInviteFingerprint: new links yes, legacy and junk no", () => {
  assert.equal(hasInviteFingerprint("e1.abc123"), true);
  assert.equal(hasInviteFingerprint("abc123"), false);
  assert.equal(hasInviteFingerprint(""), false);
  assert.equal(hasInviteFingerprint(null), false);
});


await test("branding key: builds the 3-slot form and round-trips", () => {
  // Sealed instances put the branding key b in every minted link
  // (docs/no-plaintext.md); the name slot stays, possibly empty.
  assert.equal(buildInviteFragment("abc123", "", "k3m7p2qx4f"), "e1.abc123~~k3m7p2qx4f");
  assert.deepEqual(parseInviteFragment("e1.abc123~~k3m7p2qx4f"), { T: "abc123", name: "", b: "k3m7p2qx4f" });
  assert.deepEqual(parseInviteFragment(buildInviteFragment("abc123", "Paul Campbell", "k3m7p2qx4f")), {
    T: "abc123",
    name: "Paul Campbell",
    b: "k3m7p2qx4f",
  });
});

await test("branding key: old parsers still get T from a 3-slot link", () => {
  // Slot order is fixed (T first) so a pre-branding parser that cuts at the
  // first "~" still claims from a new link.
  const frag = buildInviteFragment("abc123", "Zoë", "k3m7p2qx4f").replace(/^e1\./, "");
  assert.equal(frag.split("~")[0], "abc123");
});

await test("branding key: a legacy raw-~ name is not mistaken for a key", () => {
  // Old builders left "~" unescaped in names. The key slot must match the
  // base32 shape, so a decorative tail stays part of the name.
  assert.deepEqual(parseInviteFragment("e1.T~Zo%C3%AB%20~%20%E2%9C%A8"), { T: "T", name: "Zoë ~ ✨", b: "" });
});

await test("branding key: new builders escape ~ so names with ~ round-trip beside b", () => {
  assert.deepEqual(parseInviteFragment(buildInviteFragment("T", "Zoë ~ ✨", "k3m7p2qx4f")), {
    T: "T",
    name: "Zoë ~ ✨",
    b: "k3m7p2qx4f",
  });
});

console.log(failures === 0 ? "\nALL PASSED" : `\n${failures} FAILED`);
process.exit(failures === 0 ? 0 : 1);