'use strict';

const $ = (sel) => document.querySelector(sel);

const MASTER_KEY = 'enabled';
const PROFILES_KEY = 'profiles';

let editingProfileId = null;

// ---- Master toggle ----
async function loadMaster() {
  const { enabled } = await browser.storage.local.get(MASTER_KEY);
  $('#masterToggle').checked = enabled !== false;
  $('#masterLabel').textContent = enabled === false ? 'Disabled' : 'Enabled';
}
$('#masterToggle').addEventListener('change', async (e) => {
  await browser.storage.local.set({ [MASTER_KEY]: e.target.checked });
  $('#masterLabel').textContent = e.target.checked ? 'Enabled' : 'Disabled';
});

// ---- Profiles ----
async function getProfiles() {
  const { profiles } = await browser.storage.local.get(PROFILES_KEY);
  return profiles || [];
}
async function saveProfiles(profiles) {
  await browser.storage.local.set({ [PROFILES_KEY]: profiles });
}

function renderProfiles(profiles) {
  const list = $('#profileList');
  list.innerHTML = '';
  for (const p of profiles) {
    const li = document.createElement('li');
    const name = document.createElement('div');
    name.className = 'name';
    name.innerHTML = '<strong>' + escapeHtml(p.name) + '</strong><br><span class="user">' + escapeHtml(p.username) + '</span>';
    const toggle = document.createElement('input');
    toggle.type = 'checkbox';
    toggle.checked = !!p.enabled;
    toggle.title = 'Enable/disable';
    toggle.addEventListener('change', async () => {
      p.enabled = toggle.checked;
      await saveProfiles(profiles);
    });
    const edit = document.createElement('button');
    edit.className = 'btn';
    edit.textContent = 'Edit';
    edit.addEventListener('click', () => openProfileForm(p));
    const del = document.createElement('button');
    del.className = 'btn';
    del.textContent = 'Delete';
    del.addEventListener('click', async () => {
      await saveProfiles(profiles.filter((x) => x.id !== p.id));
      renderProfiles(await getProfiles());
    });
    li.append(toggle, name, edit, del);
    list.appendChild(li);
  }
}

function escapeHtml(s) {
  return String(s).replace(/[&<>"']/g, (c) => ({
    '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;'
  }[c]));
}

function openProfileForm(p) {
  editingProfileId = p ? p.id : null;
  $('#pName').value = p ? p.name : '';
  $('#pUsername').value = p ? p.username : '';
  $('#pPassword').value = p ? p.password : '';
  $('#pEnabled').checked = p ? !!p.enabled : true;
  $('#profileForm').hidden = false;
}
$('#addProfile').addEventListener('click', () => openProfileForm(null));
$('#cancelProfile').addEventListener('click', () => { $('#profileForm').hidden = true; });
$('#saveProfile').addEventListener('click', async () => {
  const profiles = await getProfiles();
  const data = {
    id: editingProfileId || Date.now().toString(),
    name: $('#pName').value.trim(),
    username: $('#pUsername').value.trim(),
    password: $('#pPassword').value,
    enabled: $('#pEnabled').checked
  };
  if (!data.name || !data.username) return;
  if (editingProfileId) {
    const i = profiles.findIndex((x) => x.id === editingProfileId);
    if (i >= 0) profiles[i] = data;
  } else {
    profiles.push(data);
  }
  await saveProfiles(profiles);
  $('#profileForm').hidden = true;
  renderProfiles(profiles);
});

// ---- Tabs ----
document.querySelectorAll('.tabs button').forEach((btn) => {
  btn.addEventListener('click', () => {
    document.querySelectorAll('.tabs button').forEach((b) => b.classList.remove('active'));
    btn.classList.add('active');
    $('#tab-login').hidden = btn.dataset.tab !== 'login';
    $('#tab-studyload').hidden = btn.dataset.tab !== 'studyload';
  });
});

// ---- Study Load ----
function setStatus(msg, cls) {
  const el = $('#status');
  el.textContent = msg;
  el.className = 'status ' + (cls || '');
}

function renderCourses(courses) {
  const box = $('#coursesEditor');
  box.innerHTML = '';
  courses.forEach((c, i) => {
    const row = document.createElement('div');
    row.className = 'course-row';
    row.innerHTML =
      '<div class="grid">' +
      '<input data-i="' + i + '" data-f="group" placeholder="Group" value="' + escapeHtml(c.group || '') + '">' +
      '<input data-i="' + i + '" data-f="courseCode" placeholder="Course code" value="' + escapeHtml(c.courseCode || '') + '">' +
      '<input data-i="' + i + '" data-f="description" placeholder="Description" value="' + escapeHtml(c.description || '') + '">' +
      '<input data-i="' + i + '" data-f="units" placeholder="Units" value="' + escapeHtml(c.units || '') + '">' +
      '<input data-i="' + i + '" data-f="teacher" placeholder="Teacher" value="' + escapeHtml(c.teacher || '') + '">' +
      '<input data-i="' + i + '" data-f="status" placeholder="Status" value="' + escapeHtml(c.status || '') + '">' +
      '</div>' +
      '<input data-i="' + i + '" data-f="schedule" placeholder="Schedule" value="' + escapeHtml(c.schedule || '') + '">' +
      '<button class="btn remove-course" data-i="' + i + '">Remove</button>';
    box.appendChild(row);
  });
  box.querySelectorAll('input').forEach((inp) => {
    inp.addEventListener('input', () => {
      const i = +inp.dataset.i;
      const f = inp.dataset.f;
      studyLoadCourses[i][f] = inp.value;
    });
  });
  box.querySelectorAll('.remove-course').forEach((btn) => {
    btn.addEventListener('click', () => {
      studyLoadCourses.splice(+btn.dataset.i, 1);
      renderCourses(studyLoadCourses);
    });
  });
}

let studyLoadCourses = [];

$('#loadFromPortal').addEventListener('click', async () => {
  setStatus('Loading from portal...');
  try {
    const res = await browser.runtime.sendMessage({ type: 'scrape-study-load' });
    if (!res || !res.ok) throw new Error((res && res.error) || 'Scrape failed');
    const d = res.data;
    $('#hFullName').value = d.header.fullName || '';
    $('#hStudentId').value = d.header.studentId || '';
    $('#hProgram').value = d.header.program || '';
    $('#hYearLevel').value = d.header.yearLevel || '';
    $('#hSemester').value = d.header.semester || '';
    $('#hDateEnrolled').value = d.header.dateEnrolled || '';
    $('#hDateRange').value = d.header.dateRange || '';
    $('#totalUnits').value = d.totalUnits || '';
    studyLoadCourses = d.courses || [];
    renderCourses(studyLoadCourses);
    $('#studyLoadForm').hidden = false;
    setStatus('Loaded. Review and generate.', 'ok');
  } catch (err) {
    setStatus('Could not load from portal: ' + err.message + ' — enter manually below.', 'error');
    studyLoadCourses = [];
    renderCourses(studyLoadCourses);
    $('#studyLoadForm').hidden = false;
  }
});

$('#addCourse').addEventListener('click', () => {
  studyLoadCourses.push({ group: '', courseCode: '', description: '', units: '', teacher: '', schedule: '', status: '' });
  renderCourses(studyLoadCourses);
});

$('#generatePdf').addEventListener('click', async () => {
  const data = {
    header: {
      fullName: $('#hFullName').value.trim(),
      studentId: $('#hStudentId').value.trim(),
      program: $('#hProgram').value.trim(),
      yearLevel: $('#hYearLevel').value.trim(),
      semester: $('#hSemester').value.trim(),
      dateEnrolled: $('#hDateEnrolled').value.trim(),
      dateRange: $('#hDateRange').value.trim()
    },
    courses: studyLoadCourses,
    totalUnits: $('#totalUnits').value.trim()
  };
  if (!data.courses.length) { setStatus('Add at least one course.', 'error'); return; }
  setStatus('Generating PDF...');
  try {
    const res = await browser.runtime.sendMessage({ type: 'generate-pdf', data });
    if (!res || !res.ok) throw new Error((res && res.error) || 'Generation failed');
    setStatus('PDF downloaded.', 'ok');
  } catch (err) {
    setStatus('Error: ' + err.message, 'error');
  }
});

// ---- Init ----
(async function init() {
  await loadMaster();
  renderProfiles(await getProfiles());
})();