import { test } from "node:test";
import assert from "node:assert/strict";
import { readdirSync, readFileSync } from "node:fs";
import { spawnSync } from "node:child_process";
import { run, fixtures, toolsDir } from "./helpers.mjs";
import { join } from "node:path";

const env = { COURSE_ROOT: join(fixtures, "course") };
const audit = (ws) => run("coupling-audit.mjs", [join(fixtures, ws)], env);

test("audit_flags_card_name_in_engine", () => {
  const r = audit("ws-coupled");
  assert.equal(r.code, 1);
  assert.match(r.out, /core\.rs:2/);
  assert.match(r.out, /core\.rs:3/);
  assert.match(r.out, /Baron Rivendare/);
  assert.doesNotMatch(r.out, /cards\.rs/);
});

test("audit_ignores_content_dir", () => {
  const r = audit("ws-content-only");
  assert.equal(r.code, 0, r.out);
});

test("audit_ignores_grammar_words", () => {
  const r = audit("ws-grammar");
  assert.equal(r.code, 0, r.out);
});

test("audit_ignores_mechanic_words_in_real_catalog", () => {
  // Uses the real course/catalog.json (no COURSE_ROOT override).
  const r = run("coupling-audit.mjs", [join(fixtures, "ws-mechanics")]);
  assert.equal(r.code, 0, r.out);
});

test("audit_allows_ordinary_lowercase_identifiers", () => {
  // `key`, `flag`, `wall`, `water` are noun words in the real catalog, but as lowercase
  // identifiers they are ordinary code, not content coupling.
  const r = run("coupling-audit.mjs", [join(fixtures, "ws-ordinary-words")]);
  assert.equal(r.code, 0, r.out);
});

test("audit_flags_noun_words_as_names_strings_and_variants", () => {
  // Uses the real catalog: string literal "flag", KEY, Kind::Door and "text:WALL" are coupling;
  // the lowercase identifiers on line 1 are not.
  const r = run("coupling-audit.mjs", [join(fixtures, "ws-noun-coupled")]);
  assert.equal(r.code, 1);
  assert.doesNotMatch(r.out, /core\.rs:1:/);
  assert.match(r.out, /core\.rs:2: names "FLAG"/);
  assert.match(r.out, /core\.rs:3: names "KEY"/);
  assert.match(r.out, /core\.rs:4: names "DOOR"/);
  assert.match(r.out, /core\.rs:5: names "WALL"/);
});

test("tools_do_not_rely_on_import_meta_main", () => {
  // `import.meta.main` is undefined before Node 24.2, so a tool guarded by it exits 0
  // having checked nothing. Tools use isMain() from lib.mjs (an argv comparison).
  for (const f of readdirSync(toolsDir).filter((f) => f.endsWith(".mjs"))) {
    assert.doesNotMatch(readFileSync(join(toolsDir, f), "utf8"), /import\.meta\.main/, f);
  }
});

test("audit_runs_from_a_relative_path", () => {
  const root = join(toolsDir, "..");
  const r = spawnSync("node", ["tools/coupling-audit.mjs", join(fixtures, "ws-coupled")], {
    cwd: root, encoding: "utf8", env: { ...process.env, COURSE_ROOT: join(fixtures, "course") },
  });
  assert.equal(r.status, 1, r.stdout + r.stderr);
  assert.match(r.stderr, /Baron Rivendare/);
});