'use strict';

/**
 * Self-test for keywords.js — the parsing and matching rules, pinned.
 *
 *   node modules/overflow-tap/keywords.selftest.js
 */

const assert = require('node:assert/strict');
const { parseKeywordLines, keywordMatches, matchKeyword, cleanNotes } = require('./keywords');

let n = 0;
function test(name, fn) {
  n += 1;
  try {
    fn();
    console.log(`ok   ${name}`);
  } catch (err) {
    console.log(`FAIL ${name}\n     ${err.message}`);
    process.exitCode = 1;
  }
}

test('parses keyword = destination, with -> and → too', () => {
  const m = parseKeywordLines('give = Give Online\nconnect -> Connect Card\nprayer → Prayer Request');
  assert.deepEqual(m.map((x) => [x.keyword, x.destination, x.problem]), [
    ['give', 'Give Online', ''],
    ['connect', 'Connect Card', ''],
    ['prayer', 'Prayer Request', ''],
  ]);
});

test('a trailing @ names the groups for that line', () => {
  const [m] = parseKeywordLines('connect = Connect Card @ Lobby, Kids Wing');
  assert.equal(m.destination, 'Connect Card');
  assert.deepEqual(m.groups, ['Lobby', 'Kids Wing']);
});

test('blank lines and # comments are skipped, line numbers kept', () => {
  const m = parseKeywordLines('\n# giving\n\ngive = Give Online\n');
  assert.equal(m.length, 1);
  assert.equal(m[0].line, 4);
});

test('a line without a separator is a problem, not a crash', () => {
  const [m] = parseKeywordLines('give');
  assert.equal(m.keyword, 'give');
  assert.match(m.problem, /No destination/);
});

test('missing keyword or destination is reported', () => {
  const [a, b] = parseKeywordLines('= Give Online\ngive =');
  assert.match(a.problem, /No keyword/);
  assert.match(b.problem, /No destination/);
});

test('a repeated keyword is flagged and the first line wins', () => {
  const m = parseKeywordLines('give = A\nGIVE = B');
  assert.equal(m[0].problem, '');
  assert.match(m[1].problem, /Repeated/);
  assert.equal(matchKeyword('give', m).destination, 'A');
});

test('keywords and destinations may be phrases', () => {
  const [m] = parseKeywordLines('next steps = Next Steps Card');
  assert.equal(m.keyword, 'next steps');
  assert.equal(keywordMatches('Please fill out your Next   Steps card', 'next steps', 'word'), true);
});

test('whole word: give does not fire on forgiveness, does on "give!"', () => {
  assert.equal(keywordMatches('a sermon on forgiveness', 'give', 'word'), false);
  assert.equal(keywordMatches('give!', 'give', 'word'), true);
  assert.equal(keywordMatches('Give', 'give', 'word'), true);
  assert.equal(keywordMatches('#give now', 'give', 'word'), true);
  assert.equal(keywordMatches('giveaway', 'give', 'word'), false);
  assert.equal(keywordMatches('give_now', 'give', 'word'), false);
});

test('anywhere: plain substring, like the Overflow helper', () => {
  assert.equal(keywordMatches('a sermon on forgiveness', 'give', 'anywhere'), true);
  assert.equal(keywordMatches('nothing here', 'give', 'anywhere'), false);
});

test('line: the keyword on its own line only', () => {
  assert.equal(keywordMatches('speaker note\ngive\nmore', 'give', 'line'), true);
  assert.equal(keywordMatches('give now', 'give', 'line'), false);
  assert.equal(keywordMatches('  Give  ', 'give', 'line'), true);
});

test('regex characters in a keyword are literal', () => {
  assert.equal(keywordMatches('go to (give) now', '(give)', 'word'), true);
  assert.equal(keywordMatches('give.now', 'give.now', 'anywhere'), true);
  assert.equal(keywordMatches('giveXnow', 'give.now', 'anywhere'), false);
});

test('empty notes never match; zero-width padding is ignored', () => {
  assert.equal(keywordMatches('', 'give'), false);
  assert.equal(keywordMatches('​', 'give', 'anywhere'), false);
  assert.equal(cleanNotes('​give'), 'give');
  assert.equal(keywordMatches('​give', 'give', 'line'), true);
});

test('matchKeyword returns the first mapping in admin order', () => {
  const m = parseKeywordLines('connect = Connect Card\ngive = Give Online');
  assert.equal(matchKeyword('give and connect', m).keyword, 'connect');
  assert.equal(matchKeyword('just worship', m), null);
  assert.equal(matchKeyword('give', []), null);
});

test('a mapping with a parse problem can still be the match (the caller decides)', () => {
  const m = parseKeywordLines('baptism');
  assert.equal(matchKeyword('baptism', m).problem.length > 0, true);
});

console.log(`${n} tests, exit ${process.exitCode || 0}`);