// Unit tests for the pure candidate extraction (run with `node --test`). Zero-dep.
// CJS so it can require() extract.js, which is a UMD script (also a content script).
const { test } = require("node:test");
const assert = require("node:assert/strict");
const { matchesIn, cueMatchesIn, allMatchesIn } = require("./extract.js");

test("matchesIn finds Title-Case / ALL-CAPS runs, skips stopwords", () => {
  // Note: "and" is a connector, so "X and Y" greedily joins into one run (by design,
  // for names like "Iron and Wine") — keep the two names in separate clauses here.
  const names = matchesIn("Cattle Decapitation is great; DEVOURMENT rules. I agree").map((m) => m.name);
  assert.ok(names.includes("Cattle Decapitation"));
  assert.ok(names.includes("DEVOURMENT"));
  assert.ok(!names.includes("I"));
});

test("matchesIn reports positions that map back to the text", () => {
  const text = "Check out Devourment now";
  const m = matchesIn(text).find((x) => x.name === "Devourment");
  assert.equal(text.substr(m.index, m.length), "Devourment");
});

test("cueMatchesIn catches lowercase names after a cue phrase", () => {
  const names = cueMatchesIn("you should check out devourment honestly").map((m) => m.name);
  assert.ok(names.includes("devourment"));
});

test("cueMatchesIn positions map back to the text", () => {
  const text = "i'm a big fan of cattle decapitation"; // "fan of" cue
  for (const m of cueMatchesIn(text)) assert.equal(text.substr(m.index, m.length), m.name);
});

test("cueMatchesIn skips lowercase stopwords right after the cue", () => {
  const names = cueMatchesIn("check out the new album").map((m) => m.name);
  assert.ok(!names.includes("the"));
});

test("allMatchesIn merges cue + Title-Case and sorts ascending by index", () => {
  const text = "Check out devourment and Cattle Decapitation";
  const ms = allMatchesIn(text);
  for (let i = 1; i < ms.length; i++) assert.ok(ms[i].index >= ms[i - 1].index);
  const names = ms.map((m) => m.name);
  assert.ok(names.includes("devourment")); // cue (lowercase)
  assert.ok(names.includes("Cattle Decapitation")); // title-case
});