let children = [];
let currentParent = null;

function showToast(msg) {
  const toast = document.getElementById('toast');
  toast.textContent = msg;
  toast.classList.add('show');
  setTimeout(() => toast.classList.remove('show'), 2200);
}

function fmtDate(iso) {
  if (!iso) return '';
  return new Date(iso).toLocaleDateString(undefined, { month: 'short', day: 'numeric', year: 'numeric' });
}

async function boot() {
  try {
    const me = await api.get('/api/auth/me');
    currentParent = me.parent;
    document.getElementById('householdName').textContent = me.household.name;
    document.getElementById('whoami').textContent = `Logged in as ${me.parent.name} (${me.parent.email})`;
    document.getElementById('inviteBtn').style.display = currentParent.isAdmin ? '' : 'none';
  } catch {
    window.location.href = '/login.html';
    return;
  }

  await Promise.all([loadParents(), loadChildren()]);
}

async function loadParents() {
  const { parents } = await api.get('/api/household');
  const el = document.getElementById('parentsList');
  el.innerHTML = parents.map((p) => parentCardHtml(p)).join('');
  el.querySelectorAll('[data-action]').forEach((btn) => {
    btn.addEventListener('click', () => handleParentAction(btn.dataset.action, btn.dataset));
  });
}

function parentCardHtml(p) {
  const isSelf = p.id === currentParent.id;
  const badge = p.is_admin ? '<span class="today-badge">Admin</span>' : '';

  const adminActions = (currentParent.isAdmin && !isSelf) ? `
    <button class="tool" data-action="${p.is_admin ? 'demote' : 'promote'}" data-parent="${p.id}">${p.is_admin ? 'Remove admin' : 'Make admin'}</button>
    <button class="tool" data-action="set-password" data-parent="${p.id}" data-name="${escapeHtml(p.name)}">Set password</button>
    <button class="tool danger" data-action="remove-parent" data-parent="${p.id}" data-name="${escapeHtml(p.name)}">Remove</button>
  ` : '';

  const selfActions = isSelf ? `
    <button class="tool" data-action="change-own-password">Change my password</button>
    <button class="tool danger" data-action="leave">Leave household</button>
  ` : '';

  return `
    <div class="entity-card">
      <h3>${escapeHtml(p.name)} ${badge}</h3>
      <div class="meta">${escapeHtml(p.email)}</div>
      <div class="row">${adminActions}${selfActions}</div>
    </div>
  `;
}

async function handleParentAction(action, ds) {
  try {
    if (action === 'promote' || action === 'demote') {
      await api.patch(`/api/household/parents/${ds.parent}`, { isAdmin: action === 'promote' });
      showToast(action === 'promote' ? 'Promoted to admin' : 'Admin removed');
      await loadParents();
    } else if (action === 'remove-parent') {
      if (!confirm(`Remove ${ds.name} from the household?`)) return;
      await api.del(`/api/household/parents/${ds.parent}`);
      showToast('Parent removed');
      await loadParents();
    } else if (action === 'set-password') {
      document.getElementById('setPasswordParentId').value = ds.parent;
      document.getElementById('setPasswordParentName').textContent = ds.name;
      document.getElementById('newParentPasswordInput').value = '';
      openModal('setParentPasswordModal');
    } else if (action === 'change-own-password') {
      document.getElementById('currentPasswordInput').value = '';
      document.getElementById('newOwnPasswordInput').value = '';
      openModal('changeOwnPasswordModal');
    } else if (action === 'leave') {
      if (!confirm('Leave this household? You will lose access immediately.')) return;
      await api.post('/api/household/leave');
      window.location.href = '/login.html';
    }
  } catch (err) {
    showToast(err.message);
  }
}

async function loadChildren() {
  const data = await api.get('/api/children');
  children = data.children;
  const el = document.getElementById('childrenList');
  el.innerHTML = '';

  if (children.length === 0) {
    el.innerHTML = '<div class="empty-state">No children yet — add one to create their first calendar.</div>';
    return;
  }

  for (const child of children) {
    const card = await renderChildCard(child);
    el.appendChild(card);
  }
}

async function renderChildCard(child) {
  const { calendars } = await api.get(`/api/children/${child.id}/calendars`);

  const card = document.createElement('div');
  card.className = 'entity-card';

  const calendarsHtml = calendars.length
    ? calendars.map((c) => calendarRowHtml(child, c)).join('')
    : '<div class="meta">No calendars yet.</div>';

  card.innerHTML = `
    <h3>${escapeHtml(child.name)}</h3>
    <div class="meta">${calendars.length} calendar${calendars.length === 1 ? '' : 's'}</div>
    <div>${calendarsHtml}</div>
    <div class="row">
      <button class="tool primary" data-action="new-cal" data-child="${child.id}">+ New calendar</button>
      <button class="tool" data-action="kiosk-link" data-child="${child.id}">Tablet link</button>
      <button class="tool danger" data-action="delete-child" data-child="${child.id}">Delete child</button>
    </div>
  `;

  card.querySelectorAll('[data-action]').forEach((btn) => {
    btn.addEventListener('click', () => handleCardAction(btn.dataset.action, btn.dataset));
  });

  return card;
}

function calendarRowHtml(child, cal) {
  const isActive = child.activeCalendarId === cal.id;
  return `
    <div class="row" style="justify-content:space-between; align-items:center; padding:6px 0; border-top:1px solid var(--line);">
      <div>
        <strong>${escapeHtml(cal.title)}</strong>
        <div class="meta">Updated ${fmtDate(cal.updated_at)}${isActive ? ' · on tablet' : ''}</div>
      </div>
      <div class="row">
        <a class="tool" href="/calendar.html?calendarId=${cal.id}">Open</a>
        <button class="tool" data-action="duplicate-cal" data-child="${child.id}" data-cal="${cal.id}" data-title="${escapeHtml(cal.title)}">Duplicate</button>
        ${isActive ? '' : `<button class="tool" data-action="set-active" data-child="${child.id}" data-cal="${cal.id}">Set on tablet</button>`}
        <button class="tool danger" data-action="delete-cal" data-child="${child.id}" data-cal="${cal.id}">Delete</button>
      </div>
    </div>
  `;
}

function escapeHtml(str) {
  const div = document.createElement('div');
  div.textContent = str;
  return div.innerHTML;
}

async function handleCardAction(action, ds) {
  if (action === 'new-cal') {
    document.getElementById('newCalChildId').value = ds.child;
    document.getElementById('newCalTitle').value = '';
    document.getElementById('newCalDuplicate').checked = false;
    openModal('newCalendarModal');
  } else if (action === 'duplicate-cal') {
    const title = prompt('Title for the duplicated calendar:', `Copy of ${ds.title}`);
    if (!title) return;
    await api.post(`/api/children/${ds.child}/calendars`, { title, duplicateFromCalendarId: Number(ds.cal) });
    showToast('Calendar duplicated');
    await loadChildren();
  } else if (action === 'set-active') {
    await api.patch(`/api/children/${ds.child}`, { activeCalendarId: Number(ds.cal) });
    showToast('Tablet will now show this calendar');
    await loadChildren();
  } else if (action === 'delete-cal') {
    if (!confirm('Delete this calendar? This cannot be undone.')) return;
    await api.del(`/api/calendars/${ds.cal}`);
    showToast('Calendar deleted');
    await loadChildren();
  } else if (action === 'kiosk-link') {
    const child = children.find((c) => c.id === Number(ds.child));
    openKioskModal(child);
  } else if (action === 'delete-child') {
    if (!confirm('Delete this child and all their calendars? This cannot be undone.')) return;
    await api.del(`/api/children/${ds.child}`);
    showToast('Child deleted');
    await loadChildren();
  }
}

function openModal(id) { document.getElementById(id).classList.remove('hidden'); }
function closeModal(id) { document.getElementById(id).classList.add('hidden'); }

document.getElementById('addChildBtn').addEventListener('click', () => {
  document.getElementById('childNameInput').value = '';
  openModal('addChildModal');
});
document.getElementById('cancelAddChildBtn').addEventListener('click', () => closeModal('addChildModal'));
document.getElementById('addChildForm').addEventListener('submit', async (e) => {
  e.preventDefault();
  await api.post('/api/children', { name: document.getElementById('childNameInput').value });
  closeModal('addChildModal');
  showToast('Child added');
  await loadChildren();
});

document.getElementById('cancelNewCalBtn').addEventListener('click', () => closeModal('newCalendarModal'));
document.getElementById('newCalendarForm').addEventListener('submit', async (e) => {
  e.preventDefault();
  const childId = document.getElementById('newCalChildId').value;
  const title = document.getElementById('newCalTitle').value;
  const duplicate = document.getElementById('newCalDuplicate').checked;

  let body = { title };
  if (duplicate) {
    const { calendars } = await api.get(`/api/children/${childId}/calendars`);
    if (calendars.length) body.duplicateFromCalendarId = calendars[0].id;
  }
  const { calendar } = await api.post(`/api/children/${childId}/calendars`, body);
  closeModal('newCalendarModal');
  window.location.href = `/calendar.html?calendarId=${calendar.id}`;
});

document.getElementById('inviteBtn').addEventListener('click', async () => {
  const { invite } = await api.post('/api/household/invites');
  const link = `${window.location.origin}${invite.joinPath}`;
  document.getElementById('inviteLinkField').value = link;
  openModal('inviteModal');
});
document.getElementById('closeInviteBtn').addEventListener('click', () => closeModal('inviteModal'));
document.getElementById('copyInviteBtn').addEventListener('click', () => {
  document.getElementById('inviteLinkField').select();
  navigator.clipboard.writeText(document.getElementById('inviteLinkField').value);
  showToast('Link copied');
});

let kioskModalChild = null;
function openKioskModal(child) {
  kioskModalChild = child;
  document.getElementById('kioskChildName').textContent = child.name;
  document.getElementById('kioskLinkField').value = `${window.location.origin}${child.kioskPath}`;
  openModal('kioskModal');
}
document.getElementById('closeKioskBtn').addEventListener('click', () => closeModal('kioskModal'));
document.getElementById('copyKioskBtn').addEventListener('click', () => {
  document.getElementById('kioskLinkField').select();
  navigator.clipboard.writeText(document.getElementById('kioskLinkField').value);
  showToast('Link copied');
});
document.getElementById('regenKioskBtn').addEventListener('click', async () => {
  if (!confirm('Regenerate this tablet link? The old link will stop working.')) return;
  const data = await api.post(`/api/children/${kioskModalChild.id}/kiosk-token/regenerate`);
  document.getElementById('kioskLinkField').value = `${window.location.origin}${data.kioskPath}`;
  showToast('Link regenerated');
  await loadChildren();
});

document.getElementById('cancelChangeOwnPasswordBtn').addEventListener('click', () => closeModal('changeOwnPasswordModal'));
document.getElementById('changeOwnPasswordForm').addEventListener('submit', async (e) => {
  e.preventDefault();
  try {
    await api.post('/api/household/me/password', {
      currentPassword: document.getElementById('currentPasswordInput').value,
      newPassword: document.getElementById('newOwnPasswordInput').value,
    });
    closeModal('changeOwnPasswordModal');
    showToast('Password changed');
  } catch (err) {
    showToast(err.message);
  }
});

document.getElementById('cancelSetParentPasswordBtn').addEventListener('click', () => closeModal('setParentPasswordModal'));
document.getElementById('setParentPasswordForm').addEventListener('submit', async (e) => {
  e.preventDefault();
  try {
    const parentId = document.getElementById('setPasswordParentId').value;
    await api.patch(`/api/household/parents/${parentId}/password`, {
      newPassword: document.getElementById('newParentPasswordInput').value,
    });
    closeModal('setParentPasswordModal');
    showToast('Password updated');
  } catch (err) {
    showToast(err.message);
  }
});

document.getElementById('logoutBtn').addEventListener('click', async () => {
  await api.post('/api/auth/logout');
  window.location.href = '/login.html';
});

boot();