import { test } from 'node:test';
import { strict as assert } from 'node:assert';
import { computeFindingId, parseFindingId } from '../../lib/parsers/finding-id.mjs';

test('computeFindingId — deterministic on same inputs', () => {
  const a = computeFindingId('lib/foo.mjs', 42, 'MISSING_TEST');
  const b = computeFindingId('lib/foo.mjs', 42, 'MISSING_TEST');
  assert.equal(a, b);
});

test('computeFindingId — different file → different ID', () => {
  const a = computeFindingId('lib/foo.mjs', 42, 'MISSING_TEST');
  const b = computeFindingId('lib/bar.mjs', 42, 'MISSING_TEST');
  assert.notEqual(a, b);
});

test('computeFindingId — different line → different ID', () => {
  const a = computeFindingId('lib/foo.mjs', 42, 'MISSING_TEST');
  const b = computeFindingId('lib/foo.mjs', 43, 'MISSING_TEST');
  assert.notEqual(a, b);
});

test('computeFindingId — different rule_key → different ID', () => {
  const a = computeFindingId('lib/foo.mjs', 42, 'MISSING_TEST');
  const b = computeFindingId('lib/foo.mjs', 42, 'MISSING_BRIEF_REF');
  assert.notEqual(a, b);
});

test('computeFindingId — output is 40-char lowercase hex', () => {
  const id = computeFindingId('lib/foo.mjs', 42, 'MISSING_TEST');
  assert.match(id, /^[0-9a-f]{40}$/);
});

test('computeFindingId — throws TypeError on null/undefined/empty inputs', () => {
  assert.throws(() => computeFindingId(null, 1, 'X'), TypeError);
  assert.throws(() => computeFindingId('', 1, 'X'), TypeError);
  assert.throws(() => computeFindingId('a', null, 'X'), TypeError);
  assert.throws(() => computeFindingId('a', undefined, 'X'), TypeError);
  assert.throws(() => computeFindingId('a', '', 'X'), TypeError);
  assert.throws(() => computeFindingId('a', 1, ''), TypeError);
  assert.throws(() => computeFindingId('a', 1, null), TypeError);
  assert.throws(() => computeFindingId('a', NaN, 'X'), TypeError);
});

test('parseFindingId — valid 40-char hex returns valid:true', () => {
  const id = computeFindingId('a', 1, 'X');
  assert.equal(parseFindingId(id).valid, true);
});

test('parseFindingId — bad input returns valid:false (no throw)', () => {
  assert.equal(parseFindingId('').valid, false);
  assert.equal(parseFindingId('xyz').valid, false);
  assert.equal(parseFindingId('A'.repeat(40)).valid, false); // uppercase rejected
  assert.equal(parseFindingId('0'.repeat(39)).valid, false); // too short
  assert.equal(parseFindingId('0'.repeat(41)).valid, false); // too long
  assert.equal(parseFindingId(null).valid, false);
  assert.equal(parseFindingId(undefined).valid, false);
  assert.equal(parseFindingId(42).valid, false);
});