// Re-anchoring a quote in text that changed.
//
// Run with: pnpm test:scripts
import assert from "node:assert/strict";
import test from "node:test";
import { locateQuote, normalise, quoteAnchor, sentenceAround } from "./anchor.mjs";

const P1 = "She said the vote was rigged in 2020. Nobody checked the claim at the time.";
const P2 = "Two years later she said the vote was rigged again, on a different show.";
const TEXT = `${P1}\n\n${P2}`;

test("an exact quote is found, and the context picks between two copies", () => {
  const second = TEXT.indexOf("the vote was rigged", P1.length);
  const a = quoteAnchor(TEXT, second, second + "the vote was rigged".length);
  assert.equal(a.quote, "the vote was rigged");
  const r = locateQuote(TEXT, a);
  assert.deepEqual([r.found, r.start, r.how], [true, second, "exact"]);
  const first = locateQuote(TEXT, quoteAnchor(TEXT, TEXT.indexOf("the vote"), TEXT.indexOf("the vote") + 19));
  assert.equal(first.start, TEXT.indexOf("the vote"));
});

test("a paragraph edited ABOVE the quote does not move the note off it", () => {
  const start = TEXT.indexOf("on a different show");
  const a = quoteAnchor(TEXT, start, start + "on a different show".length);
  const edited = `A new opening paragraph the agent added.\n\n${P1.replace("Nobody checked", "No outlet checked")}\n\n${P2}`;
  const r = locateQuote(edited, a);
  assert.equal(r.found, true);
  assert.equal(edited.slice(r.start, r.end), "on a different show");
});

test("whitespace, typographic quotes and case still match (normalised)", () => {
  const a = { quote: "it's  the\nclaim", prefix: "", suffix: "" };
  const t = "And then: It’s the claim, again.";
  const r = locateQuote(t, a);
  assert.equal(r.found, true);
  assert.equal(r.how, "normalised");
  assert.equal(t.slice(r.start, r.end), "It’s the claim");
});

test("a rewritten quote is found by its surviving context; a vanished one is orphaned", () => {
  const start = TEXT.indexOf("Nobody checked the claim");
  const a = quoteAnchor(TEXT, start, start + "Nobody checked the claim".length);
  const rewritten = TEXT.replace("Nobody checked the claim", "No outlet verified it");
  const r = locateQuote(rewritten, a);
  assert.equal(r.found, true);
  assert.equal(r.how, "context");
  assert.equal(rewritten.slice(r.start, r.end), "No outlet verified it");

  const gone = locateQuote("A completely different article.", a);
  assert.deepEqual(gone, { found: false });
  assert.deepEqual(locateQuote("", a), { found: false });
});

test("normalise maps back to the original offsets", () => {
  const n = normalise("  a \n\n b—c ");
  assert.equal(n.text, "a b-c");
  assert.deepEqual(n.map.slice(0, 5), [2, 3, 7, 8, 9]);
});

test("sentenceAround gives the sentence holding the quote", () => {
  const s = TEXT.indexOf("Nobody checked");
  assert.equal(sentenceAround(TEXT, s, s + 6), "Nobody checked the claim at the time.");
  const f = TEXT.indexOf("Two years");
  assert.equal(sentenceAround(TEXT, f, f + 3), P2);
});