const { test } = require('node:test');
const assert = require('node:assert');
const fs = require('node:fs');
const path = require('node:path');
const { parseStudyLoadTable } = require('../parsers.js');
const { parseProfilePage } = require('../parsers.js');
const { parseOfferedCourses } = require('../parsers.js');

const fixture = fs.readFileSync(path.join(__dirname, 'fixtures', 'study-load-table.html'), 'utf8');
const profileFixture = fs.readFileSync(path.join(__dirname, 'fixtures', 'profile.html'), 'utf8');
const offeredFixture = fs.readFileSync(path.join(__dirname, 'fixtures', 'offered-courses.html'), 'utf8');

test('parseStudyLoadTable extracts all course rows', () => {
  const rows = parseStudyLoadTable(fixture);
  assert.strictEqual(rows.length, 5);
});

test('parseStudyLoadTable maps columns correctly', () => {
  const rows = parseStudyLoadTable(fixture);
  const first = rows[0];
  assert.strictEqual(first.group, '1');
  assert.strictEqual(first.courseCode, 'CS 5105');
  assert.strictEqual(first.units, '3.00');
  assert.strictEqual(first.status, 'DISSOLVED');
  assert.ok(first.schedule.includes('F 01:30 PM'));
});

test('parseStudyLoadTable handles empty faculty', () => {
  const rows = parseStudyLoadTable(fixture);
  const it4102 = rows.find(r => r.courseCode === 'IT 4102N');
  assert.strictEqual(it4102.faculty, '');
});

test('parseProfilePage extracts header fields', () => {
  const p = parseProfilePage(profileFixture);
  assert.strictEqual(p.fullName, 'ADRIAN ALFRED CHIONG BONPIN');
  assert.strictEqual(p.studentId, '22103625');
  assert.strictEqual(p.yearLevel, '4');
  assert.strictEqual(p.studentType, 'CONTINUING');
  assert.strictEqual(p.program, 'BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY');
  assert.strictEqual(p.semester, '1ST Semester 2026');
});

test('parseProfilePage matches bold class token with single quotes and extra classes', () => {
  const html = `
    <h3><b>BACHELOR OF SCIENCE</b></h3>
    <table>
      <tr><td>Full Name</td><td class='bold text-right'>JOHN DOE</td></tr>
      <tr><td>Student Type</td><td class="bold">CONTINUING</td></tr>
    </table>
  `;
  const p = parseProfilePage(html);
  assert.strictEqual(p.fullName, 'JOHN DOE');
  assert.strictEqual(p.studentType, 'CONTINUING');
  assert.strictEqual(p.program, 'BACHELOR OF SCIENCE');
});

test('parseProfilePage degrades gracefully on empty input', () => {
  const p = parseProfilePage('');
  assert.deepStrictEqual(p, {});
});

test('parseOfferedCourses extracts course code and description', () => {
  const courses = parseOfferedCourses(offeredFixture);
  const it3206 = courses.find(c => c.courseCode === 'IT 3206');
  assert.ok(it3206, 'should find IT 3206');
  assert.strictEqual(it3206.description, 'INTEGRATIVE PROGRAMMING AND TECHNOLOGY');
});

test('parseOfferedCourses strips group suffix from code', () => {
  const courses = parseOfferedCourses(offeredFixture);
  assert.ok(courses.every(c => !/Group/.test(c.courseCode)));
  const it3206n = courses.find(c => c.courseCode === 'IT 3206N');
  assert.ok(it3206n, 'should find IT 3206N');
});

const { filterStudyLoadCourses, sumUnits } = require('../parsers.js');

test('filterStudyLoadCourses excludes DISSOLVED courses', () => {
  const courses = [
    { courseCode: 'CS 5105', status: 'DISSOLVED', units: '3.00' },
    { courseCode: 'IT 3206', status: 'PARALLEL', units: '3.00' },
    { courseCode: 'IT 4102N', status: 'REGULAR', units: '3.00' }
  ];
  const filtered = filterStudyLoadCourses(courses);
  assert.deepStrictEqual(filtered.map((c) => c.courseCode), ['IT 3206', 'IT 4102N']);
});

test('filterStudyLoadCourses handles missing status', () => {
  const filtered = filterStudyLoadCourses([{ courseCode: 'X', status: '', units: '1' }]);
  assert.strictEqual(filtered.length, 1);
});

test('sumUnits computes total from course units', () => {
  const courses = [{ units: '3.00' }, { units: '3.00' }, { units: '2.00' }];
  assert.strictEqual(sumUnits(courses), '8.00');
});