/**
 * Which failures explain themselves, and which ask to be reported.
 */
import { test } from "node:test";
import assert from "node:assert/strict";
import {
  CONTACT,
  NO_CARD,
  NO_GREETING,
  SuckerError,
  TOO_FEW_MESSAGES,
  TRUNCATED_CARD,
  isSuckerError,
  userFacingMessage,
} from "../src/lib/errors.ts";

test("an explained failure is shown to the user as written", () => {
  for (const e of [NO_CARD, NO_GREETING, TOO_FEW_MESSAGES, TRUNCATED_CARD]) {
    assert.equal(userFacingMessage(e), e.message);
    assert.ok(!/dingus/i.test(e.message), "nobody is called a dingus for these");
  }
});

test("an unexplained failure owns it and asks to be reported", () => {
  const msg = userFacingMessage(new TypeError("Cannot read properties of undefined"));
  assert.match(msg, /not your fault/i);
  assert.ok(msg.includes(CONTACT), "must say where to report it");
  // The internals must not leak into a user-facing reply.
  assert.ok(!msg.includes("Cannot read properties"));
});

test("the truncated-card case keeps the context-size advice", () => {
  assert.match(TRUNCATED_CARD.message, /Context Size/);
  assert.ok(TRUNCATED_CARD.message.includes(CONTACT));
});

test("recognised across module boundaries, not just by identity", () => {
  assert.ok(isSuckerError(new SuckerError("x")));
  // What a second copy of the class in another bundle would look like.
  assert.ok(isSuckerError({ name: "SuckerError", message: "x" }));
  assert.ok(!isSuckerError(new Error("x")));
  assert.ok(!isSuckerError(null));
  assert.ok(!isSuckerError("SuckerError"));
});