/* FORM_JS_MARKER */
const CONFIG = window.CONFIG;
const MEALS = CONFIG.meals;
const ROSTER = CONFIG.roster;
const SUBMIT_URL = CONFIG.submitUrl;
const STATUS_URL = CONFIG.statusUrl;
const ROSTER_URL = CONFIG.rosterUrl;
const ADMIN_URL = CONFIG.adminUrl;
const ADMIN_PDF_URL = CONFIG.adminPdfUrl;
const WEEK = CONFIG.week;
const BULK_DISCOUNT = CONFIG.bulkDiscount;
const COMPANY_SUBSIDY = CONFIG.companySubsidy;
const GOOGLE_CLIENT_ID = CONFIG.googleClientId || '';

window.MEALS = MEALS;
window.WEEK = WEEK;
window.ADMIN_URL = ADMIN_URL;
window.ADMIN_PDF_URL = ADMIN_PDF_URL;

const quantities = {};
let formClosed = false;
let formStatusData = null;
let isAdmin = false;
let adminWeeks = [];
let googleCredential = null;
let googleUser = null;
let reopenAtMs = null;
let countdownTimer = null;
let mealsListDelegationBound = false;

const GOOGLE_AUTH_MAX_ATTEMPTS = 200;

window.googleCredential = null;

function employeePrice(retail) {
  if (!retail) return 0;
  const bulkPrice = Math.round(retail * (1 - BULK_DISCOUNT / 100) * 100 + 1e-8) / 100;
  const empPrice = Math.round(bulkPrice * (1 - COMPANY_SUBSIDY / 100) * 100 + 1e-8) / 100;
  return empPrice;
}

function clearStatus(scope) {
  const prefix = scope === 'admin' ? 'admin-status' : 'form-status';
  const alertEl = document.getElementById(prefix + '-alert');
  const infoEl = document.getElementById(prefix + '-info');
  if (alertEl) alertEl.textContent = '';
  if (infoEl) infoEl.textContent = '';
}

function showStatus(message, options) {
  const opts = options || {};
  const tone = opts.tone || 'error';
  const scope = opts.scope || 'form';
  const prefix = scope === 'admin' ? 'admin-status' : 'form-status';
  const alertEl = document.getElementById(prefix + '-alert');
  const infoEl = document.getElementById(prefix + '-info');
  if (!alertEl || !infoEl) return;
  if (tone === 'info') {
    alertEl.textContent = '';
    infoEl.textContent = message || '';
  } else {
    infoEl.textContent = '';
    alertEl.textContent = message || '';
  }
}

window.FormUtils = { employeePrice, showStatus, clearStatus };

function syncGoogleCredential() {
  window.googleCredential = googleCredential;
}

function buildItems() {
  return Object.entries(quantities).map(([i, qty]) => ({
    name: MEALS[i].name,
    retail_price: MEALS[i].price,
    quantity: qty,
  }));
}

function waitForGoogleAuth(attempt = 0) {
  if (typeof google !== 'undefined' && google.accounts && google.accounts.id) {
    initGoogleAuth();
  } else if (attempt < GOOGLE_AUTH_MAX_ATTEMPTS) {
    setTimeout(() => waitForGoogleAuth(attempt + 1), 50);
  } else {
    const signIn = document.getElementById('g-signin-btn');
    if (signIn) {
      signIn.textContent = 'Google sign-in failed to load. Refresh the page to try again.';
    }
    console.error('Google Identity Services failed to load.');
  }
}

function initGoogleAuth() {
  google.accounts.id.initialize({
    client_id: GOOGLE_CLIENT_ID,
    callback: handleCredentialResponse,
    auto_select: true,
  });
  google.accounts.id.renderButton(
    document.getElementById('g-signin-btn'),
    { theme: 'outline', size: 'large', text: 'signin_with', width: 300 }
  );
}

function handleCredentialResponse(response) {
  googleCredential = response.credential;
  syncGoogleCredential();
  const b64 = response.credential.split('.')[1].replace(/-/g, '+').replace(/_/g, '/');
  const payloadBytes = Uint8Array.from(atob(b64), c => c.charCodeAt(0));
  const payload = JSON.parse(new TextDecoder().decode(payloadBytes));
  googleUser = { name: payload.name, email: payload.email };

  document.getElementById('auth-overlay').classList.add('is-hidden');
  document.getElementById('app').classList.remove('is-hidden');
  const footer = document.getElementById('sticky-footer');
  if (footer) footer.classList.remove('is-hidden');
  document.getElementById('user-name').textContent = payload.name;
  document.getElementById('user-email').textContent = payload.email;
  if (payload.picture) {
    const avatar = document.getElementById('user-avatar');
    avatar.src = payload.picture;
    avatar.classList.remove('is-hidden');
  }

  updateTotal();
  checkDuplicateOrder();
  checkAdmin().then(() => {
    if (formClosed && !isAdmin) showClosedOverlay();
  });
}

function signOut() {
  isAdmin = false;
  const ab = document.getElementById('admin-btn');
  if (ab) ab.classList.add('is-hidden');
  const banner = document.getElementById('admin-closed-banner');
  if (banner) banner.remove();
  googleCredential = null;
  googleUser = null;
  syncGoogleCredential();
  if (CONFIG.authMode === 'google' && typeof google !== 'undefined' && google.accounts) {
    google.accounts.id.disableAutoSelect();
  }
  document.getElementById('auth-overlay').classList.remove('is-hidden');
  document.getElementById('app').classList.add('is-hidden');
  const footer = document.getElementById('sticky-footer');
  if (footer) footer.classList.add('is-hidden');
  if (formClosed) showClosedOverlay();
}

function checkDuplicateOrder() {
  try {
    if (localStorage.getItem('lastOrderWeek') === WEEK) {
      document.getElementById('duplicate-warning').classList.remove('is-hidden');
    }
  } catch (e) {}
}

function getActiveFilter() {
  return document.querySelector('.filters button.active')?.textContent || 'All Meals';
}

function mealMatchesFilter(meal, activeFilter, search) {
  if (activeFilter !== 'All Meals' && !(meal.dietary_tags || []).includes(activeFilter)) return false;
  if (search && !meal.name.toLowerCase().includes(search)) return false;
  return true;
}

function buildMealMetaHtml(meal) {
  const hasDiscount = CONFIG.hasDiscount && meal.price;
  const empPrice = employeePrice(meal.price);
  const meta = document.createElement('div');
  meta.className = 'meal-meta';
  if (hasDiscount) {
    const retail = document.createElement('span');
    retail.className = 'price-retail';
    retail.textContent = '$' + meal.price.toFixed(2);
    meta.appendChild(retail);
    const employee = document.createElement('span');
    employee.className = 'price-employee';
    employee.textContent = '$' + empPrice.toFixed(2);
    meta.appendChild(employee);
  } else if (meal.price) {
    meta.appendChild(document.createTextNode('$' + meal.price.toFixed(2)));
  } else {
    meta.appendChild(document.createTextNode('—'));
  }
  meta.appendChild(document.createTextNode(' · ' + (meal.calories || '?') + ' cal · ' + (meal.protein || '?') + ' protein'));
  return meta;
}

function buildMealTagsEl(meal) {
  const tagsEl = document.createElement('div');
  tagsEl.className = 'meal-tags';
  if (meal.is_new) {
    const span = document.createElement('span');
    span.className = 'new';
    span.textContent = 'NEW';
    tagsEl.appendChild(span);
  }
  (meal.dietary_tags || []).forEach(t => {
    const span = document.createElement('span');
    span.textContent = t;
    tagsEl.appendChild(span);
  });
  return tagsEl;
}

function removeDescToggle(card) {
  const existing = card.querySelector('.meal-desc-toggle');
  if (existing) existing.remove();
}

function attachDescToggleIfOverflow(card) {
  const descEl = card.querySelector('.meal-desc');
  if (!descEl || descEl.classList.contains('is-hidden')) return;
  removeDescToggle(card);
  if (descEl.scrollHeight <= descEl.clientHeight + 1) return;

  const btn = document.createElement('button');
  btn.type = 'button';
  btn.className = 'meal-desc-toggle';
  btn.textContent = 'More';
  btn.setAttribute('aria-expanded', 'false');
  btn.addEventListener('click', () => {
    const expanded = descEl.classList.toggle('is-expanded');
    btn.textContent = expanded ? 'Less' : 'More';
    btn.setAttribute('aria-expanded', expanded ? 'true' : 'false');
  });
  descEl.after(btn);
}

function scheduleDescToggle(card) {
  requestAnimationFrame(() => {
    attachDescToggleIfOverflow(card);
  });
}

function updateMealCard(card, meal, i) {
  const qty = quantities[i] || 0;
  card.dataset.mealIndex = String(i);
  card.classList.toggle('selected', qty > 0);

  const img = card.querySelector('.meal-img');
  if (meal.image_url && /^https?:\/\//i.test(meal.image_url)) {
    img.src = meal.image_url;
    img.alt = meal.name;
    img.classList.remove('is-hidden');
  } else {
    img.removeAttribute('src');
    img.alt = '';
    img.classList.add('is-hidden');
  }

  card.querySelector('.meal-name').textContent = meal.name;

  const descEl = card.querySelector('.meal-desc');
  removeDescToggle(card);
  descEl.classList.remove('is-expanded');
  if (meal.description) {
    descEl.textContent = meal.description;
    descEl.classList.remove('is-hidden');
    scheduleDescToggle(card);
  } else {
    descEl.textContent = '';
    descEl.classList.add('is-hidden');
  }

  const metaEl = card.querySelector('.meal-meta');
  const newMeta = buildMealMetaHtml(meal);
  metaEl.replaceWith(newMeta);

  const tagsEl = card.querySelector('.meal-tags');
  const newTags = buildMealTagsEl(meal);
  tagsEl.replaceWith(newTags);

  const qtyInput = card.querySelector('.qty');
  qtyInput.value = qty;
  qtyInput.setAttribute('aria-label', 'Quantity of ' + meal.name);

  const minusBtn = card.querySelector('[data-qty-delta="-1"]');
  const plusBtn = card.querySelector('[data-qty-delta="1"]');
  if (minusBtn) minusBtn.setAttribute('aria-label', 'Remove one ' + meal.name);
  if (plusBtn) plusBtn.setAttribute('aria-label', 'Add one ' + meal.name);

  const disabled = formClosed && !isAdmin;
  card.querySelectorAll('[data-qty-delta]').forEach(btn => { btn.disabled = disabled; });
  qtyInput.disabled = disabled;
}

function createMealCard(meal, i) {
  const tpl = document.getElementById('meal-card-tpl');
  const card = tpl.content.firstElementChild.cloneNode(true);
  updateMealCard(card, meal, i);
  return card;
}

function renderMeals() {
  const activeFilter = getActiveFilter();
  const search = document.getElementById('search').value.toLowerCase();
  const list = document.getElementById('meals-list');
  list.innerHTML = '';

  MEALS.forEach((meal, i) => {
    if (!mealMatchesFilter(meal, activeFilter, search)) return;
    list.appendChild(createMealCard(meal, i));
  });

  updateTotal();
}

function findMealCard(index) {
  return document.querySelector(`[data-meal-index="${index}"]`);
}

function updateMealCardQty(index) {
  const card = findMealCard(index);
  if (!card) return;
  const qty = quantities[index] || 0;
  card.classList.toggle('selected', qty > 0);
  const qtyInput = card.querySelector('.qty');
  if (qtyInput && qtyInput !== document.activeElement) qtyInput.value = qty;
}

function setQtyState(index, value) {
  const next = Math.max(0, parseInt(value, 10) || 0);
  if (next === 0) delete quantities[index];
  else quantities[index] = next;
}

function setQty(index, value) {
  setQtyState(index, value);
  updateMealCardQty(index);
  updateTotal();
}

function changeQty(index, delta) {
  const current = quantities[index] || 0;
  setQty(index, current + delta);
}

function bindMealsListDelegation() {
  if (mealsListDelegationBound) return;
  mealsListDelegationBound = true;
  const list = document.getElementById('meals-list');
  list.addEventListener('click', (e) => {
    const btn = e.target.closest('[data-qty-delta]');
    if (!btn) return;
    const card = btn.closest('[data-meal-index]');
    if (!card) return;
    const index = parseInt(card.dataset.mealIndex, 10);
    const delta = parseInt(btn.dataset.qtyDelta, 10);
    changeQty(index, delta);
  });
  list.addEventListener('input', (e) => {
    const input = e.target.closest('.qty');
    if (!input) return;
    const card = input.closest('[data-meal-index]');
    if (!card) return;
    const index = parseInt(card.dataset.mealIndex, 10);
    setQtyState(index, input.value);
    updateTotal();
  });
  list.addEventListener('focusout', (e) => {
    const input = e.target.closest('.qty');
    if (!input) return;
    const card = input.closest('[data-meal-index]');
    if (!card) return;
    updateMealCardQty(parseInt(card.dataset.mealIndex, 10));
  });
}

function updateTotal() {
  let total = 0;
  let count = 0;
  Object.entries(quantities).forEach(([i, qty]) => {
    total += employeePrice(MEALS[i].price || 0) * qty;
    count += qty;
  });
  document.getElementById('total-display').textContent = '$' + total.toFixed(2);
  document.getElementById('count-display').textContent = count + ' meal' + (count !== 1 ? 's' : '');
  const submitBtn = document.getElementById('submit-btn');
  submitBtn.disabled = count === 0 || (CONFIG.authMode === 'google' && !googleCredential);
}

async function submitOrder() {
  clearStatus('form');

  if (formClosed && !isAdmin) {
    showStatus('Orders are closed.', { tone: 'error', scope: 'form' });
    return;
  }

  let payload;
  let successName;

  if (CONFIG.authMode === 'google') {
    if (!googleCredential || !googleUser) {
      showStatus('Please sign in with Google first.', { tone: 'error', scope: 'form' });
      return;
    }
    payload = { google_id_token: googleCredential, items: buildItems() };
    successName = googleUser.name;
  } else {
    const nameEl = document.getElementById('emp-name');
    const emailEl = document.getElementById('emp-email');
    const name = nameEl.value.trim();
    const email = emailEl.value.trim();
    if (!name) {
      showStatus('Please enter your name.', { tone: 'error', scope: 'form' });
      nameEl.focus();
      return;
    }
    if (!email) {
      showStatus('Please enter your email.', { tone: 'error', scope: 'form' });
      emailEl.focus();
      return;
    }
    payload = { employee_name: name, employee_email: email, items: buildItems() };
    successName = name;
  }

  const btn = document.getElementById('submit-btn');
  btn.disabled = true;
  btn.textContent = 'Submitting...';

  try {
    const res = await fetch(SUBMIT_URL, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(payload),
    });
    const data = await res.json();
    if (res.ok) {
      for (const el of document.getElementById('app').children) {
        if (el.id !== 'success') el.classList.add('is-hidden');
      }
      document.getElementById('success').classList.remove('is-hidden');
      document.getElementById('success-detail').textContent =
        successName + ' — $' + (data.total || 0).toFixed(2) + ' total. You\'re all set!';
      const footer = document.querySelector('.sticky-footer');
      if (footer) footer.classList.add('is-hidden');
      try { localStorage.setItem('lastOrderWeek', WEEK); } catch (e) {}
      const successHeading = document.getElementById('success-heading');
      if (successHeading) successHeading.focus();
    } else {
      showStatus(data.error || 'Something went wrong.', { tone: 'error', scope: 'form' });
      btn.disabled = false;
      btn.textContent = 'Submit Order';
    }
  } catch (e) {
    showStatus('Failed to submit. Check your connection and try again.', { tone: 'error', scope: 'form' });
    btn.disabled = false;
    btn.textContent = 'Submit Order';
  }
}

function bindEmpNameChange(select) {
  if (select.dataset.boundChange === '1') return;
  select.dataset.boundChange = '1';
  select.addEventListener('change', () => {
    const selected = select.options[select.selectedIndex];
    document.getElementById('emp-email').value = selected?.dataset?.email || '';
    clearStatus('form');
  });
}

function populateEmpSelect(select, employees) {
  select.innerHTML = '<option value="">Select your name</option>';
  employees.forEach(emp => {
    const opt = document.createElement('option');
    opt.value = emp.name;
    opt.dataset.email = emp.email;
    opt.textContent = emp.name;
    select.appendChild(opt);
  });
  bindEmpNameChange(select);
}

async function loadRoster() {
  let employees = ROSTER;
  try {
    const res = await fetch(ROSTER_URL);
    const data = await res.json();
    const candidate = data.employees;
    if (Array.isArray(candidate) && candidate.every(e => typeof e.name === 'string' && typeof e.email === 'string')) {
      employees = candidate;
    } else {
      employees = ROSTER;
    }
  } catch (e) {}

  const select = document.getElementById('emp-name');
  populateEmpSelect(select, employees);
}

function showClosedOverlay() {
  const overlay = document.getElementById('closed-overlay');
  overlay.classList.add('is-visible');
  overlay.style.display = 'flex';
  document.querySelectorAll('.qty-control button, .qty-control .qty').forEach(el => { el.disabled = true; });
  const submitBtn = document.getElementById('submit-btn');
  if (submitBtn) submitBtn.disabled = true;
  if (formStatusData) startCountdown(formStatusData);
}

function adminBypassClosed() {
  const overlay = document.getElementById('closed-overlay');
  overlay.classList.remove('is-visible');
  overlay.style.display = 'none';
  document.querySelectorAll('.qty-control button').forEach(b => { b.disabled = false; });
  const submitBtn = document.getElementById('submit-btn');
  if (submitBtn) submitBtn.disabled = Object.keys(quantities).length === 0;
  if (!document.getElementById('admin-closed-banner')) {
    const banner = document.createElement('div');
    banner.id = 'admin-closed-banner';
    banner.className = 'closed-banner';
    banner.textContent = 'Form is closed — admin override active';
    const deadline = document.querySelector('.deadline');
    if (deadline) deadline.parentNode.insertBefore(banner, deadline.nextSibling);
  }
  document.querySelectorAll('[data-meal-index]').forEach(card => {
    const index = parseInt(card.dataset.mealIndex, 10);
    const meal = MEALS[index];
    if (meal) updateMealCard(card, meal, index);
  });
  updateTotal();
}

function checkAdmin() {
  if (!ADMIN_URL) return Promise.resolve();
  const headers = {};
  if (googleCredential) headers['Authorization'] = 'Bearer ' + googleCredential;
  return fetch(ADMIN_URL, { headers })
    .then(r => r.ok ? r.json() : null)
    .then(data => {
      if (data && data.weeks) {
        isAdmin = true;
        window.isAdmin = true;
        adminWeeks = data.weeks;
        window.adminWeeks = adminWeeks;
        const ab = document.getElementById('admin-btn');
        if (ab) ab.classList.remove('is-hidden');
        if (formClosed) adminBypassClosed();
      } else if (formClosed) {
        showClosedOverlay();
      }
    })
    .catch(() => {
      if (formClosed) showClosedOverlay();
    });
}

function showAdmin() {
  document.querySelectorAll('#app > :not(#admin-panel)').forEach(el => {
    if (el.id !== 'admin-panel') {
      el.dataset.prevHidden = el.classList.contains('is-hidden') ? '1' : '';
      el.classList.add('is-hidden');
    }
  });
  document.getElementById('admin-panel').classList.remove('is-hidden');
  const footer = document.querySelector('.sticky-footer');
  if (footer) footer.classList.add('is-hidden');

  const select = document.getElementById('admin-week');
  select.innerHTML = '';
  adminWeeks.forEach(w => {
    const opt = document.createElement('option');
    opt.value = w.week;
    opt.textContent = w.week + (w.form_status === 'open' ? ' (open)' : '');
    select.appendChild(opt);
  });
  if (adminWeeks.length > 0 && typeof loadWeekOrders === 'function') {
    loadWeekOrders(adminWeeks[0].week);
  }
}

function hideAdmin() {
  document.getElementById('admin-panel').classList.add('is-hidden');
  document.querySelectorAll('#app > :not(#admin-panel)').forEach(el => {
    if (el.dataset.prevHidden === '1') el.classList.add('is-hidden');
    else el.classList.remove('is-hidden');
    delete el.dataset.prevHidden;
  });
  const footer = document.querySelector('.sticky-footer');
  if (footer) footer.classList.remove('is-hidden');
}

const easternFormatter = new Intl.DateTimeFormat('en-US', {
  timeZone: 'America/New_York',
  year: 'numeric',
  month: '2-digit',
  day: '2-digit',
  hour: '2-digit',
  minute: '2-digit',
  second: '2-digit',
  hourCycle: 'h23',
});

function getEasternParts(date) {
  const values = {};
  easternFormatter.formatToParts(date).forEach(part => {
    if (part.type !== 'literal') values[part.type] = Number(part.value);
  });
  return values;
}

function getEasternOffsetMs(date) {
  const parts = getEasternParts(date);
  return Date.UTC(parts.year, parts.month - 1, parts.day, parts.hour, parts.minute, parts.second) - date.getTime();
}

function startCountdown(data) {
  if (data && data.reopen_at) reopenAtMs = data.reopen_at * 1000;
  updateCountdown();
  if (countdownTimer !== null) clearInterval(countdownTimer);
  countdownTimer = setInterval(updateCountdown, 1000);
}

function updateCountdown() {
  const now = new Date();
  let target;

  if (reopenAtMs) {
    target = new Date(reopenAtMs);
  } else {
    const etNow = getEasternParts(now);
    const day = new Date(Date.UTC(etNow.year, etNow.month - 1, etNow.day)).getUTCDay();
    const hour = etNow.hour;

    let daysUntil = (1 - day + 7) % 7;
    if (daysUntil === 0 && hour >= 8) daysUntil = 7;

    const targetEtMs = Date.UTC(etNow.year, etNow.month - 1, etNow.day + daysUntil, 8, 0, 0);
    target = new Date(targetEtMs - getEasternOffsetMs(new Date(targetEtMs)));
  }

  let diff = Math.max(0, Math.floor((target - now) / 1000));
  const d = Math.floor(diff / 86400); diff %= 86400;
  const h = Math.floor(diff / 3600); diff %= 3600;
  const m = Math.floor(diff / 60);
  const s = diff % 60;

  const pad = n => String(n).padStart(2, '0');
  document.getElementById('countdown').textContent = d + 'd ' + pad(h) + 'h ' + pad(m) + 'm ' + pad(s) + 's';
}

async function checkFormStatus() {
  if (!STATUS_URL) return;
  try {
    const res = await fetch(STATUS_URL);
    const data = await res.json();
    if (data.status === 'closed') {
      formClosed = true;
      formStatusData = data;
      if (isAdmin) {
        adminBypassClosed();
      } else if (CONFIG.authMode !== 'google' || googleCredential) {
        showClosedOverlay();
      }
    }
  } catch (e) {}
}

function init() {
  checkFormStatus();
  if (CONFIG.authMode === 'google') {
    waitForGoogleAuth();
  } else {
    loadRoster();
    checkDuplicateOrder();
  }

  const tags = new Set();
  MEALS.forEach(m => (m.dietary_tags || []).forEach(t => tags.add(t)));
  const cats = ['All Meals', ...Array.from(tags).sort()];
  const filtersEl = document.getElementById('filters');
  cats.forEach(cat => {
    const btn = document.createElement('button');
    btn.type = 'button';
    const isActive = cat === 'All Meals';
    btn.className = 'btn btn-chip' + (isActive ? ' active' : '');
    btn.setAttribute('aria-pressed', isActive ? 'true' : 'false');
    btn.textContent = cat;
    btn.addEventListener('click', () => {
      filtersEl.querySelectorAll('button').forEach(b => {
        b.classList.remove('active');
        b.setAttribute('aria-pressed', 'false');
      });
      btn.classList.add('active');
      btn.setAttribute('aria-pressed', 'true');
      renderMeals();
    });
    filtersEl.appendChild(btn);
  });

  document.getElementById('search').addEventListener('input', renderMeals);
  document.getElementById('submit-btn').addEventListener('click', submitOrder);

  const adminBtn = document.getElementById('admin-btn');
  if (adminBtn) adminBtn.addEventListener('click', showAdmin);

  const signOutBtn = document.getElementById('sign-out-btn');
  if (signOutBtn) signOutBtn.addEventListener('click', signOut);

  const successBackBtn = document.getElementById('success-back-btn');
  if (successBackBtn) successBackBtn.addEventListener('click', () => location.reload());

  bindMealsListDelegation();
  renderMeals();
}

window.showAdmin = showAdmin;
window.hideAdmin = hideAdmin;
window.submitOrder = submitOrder;
window.changeQty = changeQty;

init();