/* Newbury Nights — admin console */
const $ = (s, r = document) => r.querySelector(s);
const $$ = (s, r = document) => [...r.querySelectorAll(s)];

let TOKEN = null;
let GHOSTS = [];
let SETS = [];

const api = (path, opts = {}) =>
  fetch(path, {
    ...opts,
    headers: {
      ...(opts.body && !(opts.body instanceof FormData) ? { 'Content-Type': 'application/json' } : {}),
      ...(TOKEN ? { Authorization: `Bearer ${TOKEN}` } : {}),
      ...(opts.headers || {}),
    },
  });

/* ---------- Auth ---------- */
$('#lg-go').addEventListener('click', login);
$('#lg-pass').addEventListener('keydown', (e) => { if (e.key === 'Enter') login(); });

async function login() {
  const username = $('#lg-user').value.trim();
  const password = $('#lg-pass').value;
  const err = $('#lg-error');
  err.classList.add('hidden');
  const res = await api('/auth/login', { method: 'POST', body: JSON.stringify({ username, password }) });
  if (!res.ok) {
    err.textContent = 'Invalid username or password.';
    err.classList.remove('hidden');
    return;
  }
  const data = await res.json();
  TOKEN = data.token;
  $('#acct-user').textContent = data.user.username;
  $('#login').classList.add('hidden');
  $('#app').classList.remove('hidden');
  await Promise.all([loadGhosts(), loadSets()]);
}

$('#logout').addEventListener('click', async () => {
  await api('/auth/logout', { method: 'POST' });
  location.reload();
});

/* ---------- Tabs ---------- */
$$('.tab').forEach((t) =>
  t.addEventListener('click', () => {
    $$('.tab').forEach((x) => x.classList.remove('active'));
    t.classList.add('active');
    $$('.tab-panel').forEach((p) => p.classList.add('hidden'));
    $(`#tab-${t.dataset.tab}`).classList.remove('hidden');
  })
);

/* ---------- Ghosts ---------- */
async function loadGhosts() {
  const res = await api('/api/admin/ghosts');
  GHOSTS = (await res.json()).ghosts;
  renderGhosts();
}

$('#ghost-search').addEventListener('input', renderGhosts);

function renderGhosts() {
  const q = $('#ghost-search').value.toLowerCase();
  const rows = GHOSTS.filter(
    (g) => !q || g.name.toLowerCase().includes(q) || (g.ability || '').toLowerCase().includes(q)
  ).map(ghostRow).join('');
  $('#ghosts-table tbody').innerHTML = rows;

  $$('#ghosts-table .edit').forEach((b) =>
    b.addEventListener('click', () => openGhost(+b.dataset.id)));
  $$('#ghosts-table .del').forEach((b) =>
    b.addEventListener('click', () => deleteGhost(+b.dataset.id)));
  $$('#ghosts-table .toggle').forEach((b) =>
    b.addEventListener('click', () => toggleGhost(+b.dataset.id)));
}

function ghostRow(g) {
  const img = g.image_path
    ? `<img src="/uploads/${g.image_path}" alt="">`
    : (g.webm_path
        ? `<video src="/uploads/${g.webm_path}" muted loop autoplay playsinline></video>`
        : '');
  const setRef = g.set_number ? `${g.set_number}` : '—';
  return `<tr>
    <td class="thumb-cell">${img}</td>
    <td><div>${esc(g.name)}${g.is_boss ? ' <span class="pill">boss</span>' : ''}</div>
        ${g.display_name && g.display_name !== g.name ? `<div class="sub">↳ ${esc(g.display_name)}</div>` : ''}</td>
    <td><span class="dot ${g.type}"></span> ${g.type}</td>
    <td class="stars">${'★'.repeat(g.rarity)}</td>
    <td>${g.health}</td><td>${g.damage}</td>
    <td>${esc(g.ability || '—')}</td>
    <td class="mono">${setRef}</td>
    <td><span class="toggle ${g.enabled ? 'on' : 'off'}" data-id="${g.id}">${g.enabled ? '◉' : '◯'}</span></td>
    <td><div class="row-actions">
      <button class="edit" data-id="${g.id}">Edit</button>
      <button class="danger del" data-id="${g.id}">Del</button>
    </div></td>
  </tr>`;
}

async function toggleGhost(id) {
  const g = GHOSTS.find((x) => x.id === id);
  await api(`/api/admin/ghosts/${id}`, { method: 'PATCH', body: JSON.stringify({ enabled: !g.enabled }) });
  await loadGhosts();
}

async function deleteGhost(id) {
  const g = GHOSTS.find((x) => x.id === id);
  if (!confirm(`Delete "${g.name}"? This also removes it from any set rosters.`)) return;
  await api(`/api/admin/ghosts/${id}`, { method: 'DELETE' });
  await Promise.all([loadGhosts(), loadSets()]);
}

/* ghost modal */
let editingGhostId = null;
$('#new-ghost').addEventListener('click', () => openGhost(null));

function openGhost(id) {
  editingGhostId = id;
  const g = id ? GHOSTS.find((x) => x.id === id) : null;
  $('#gm-title').textContent = g ? 'Edit ghost' : 'New ghost';
  $('#gm-name').value = g?.name || '';
  $('#gm-display').value = g?.display_name || '';
  $('#gm-type').value = g?.type || 'red';
  $('#gm-rarity').value = g?.rarity ?? 1;
  $('#gm-health').value = g?.health ?? 300;
  $('#gm-damage').value = g?.damage ?? 150;
  $('#gm-speed').value = g?.speed ?? 3;
  $('#gm-range').value = g?.range ?? 3;
  $('#gm-charge').value = g?.charge_shot ?? 2;
  $('#gm-ability').value = g?.ability || '';
  $('#gm-setnum').value = g?.set_number || '';
  $('#gm-setname').value = g?.set_name || '';
  $('#gm-boss').checked = !!g?.is_boss;
  $('#gm-enabled').checked = g ? !!g.enabled : true;
  $('#gm-file').value = '';
  // Show the existing stored media: prefer the WebM video, else a still image
  // (image_path is the GIF/PNG, or the WebP thumbnail for converted ghosts).
  if (g?.webm_path) showPreview(`/uploads/${g.webm_path}`, 'video');
  else if (g?.image_path) showPreview(`/uploads/${g.image_path}`, 'image');
  else if (g?.webp_path) showPreview(`/uploads/${g.webp_path}`, 'image');
  else hidePreview();
  $('#ghost-modal').classList.remove('hidden');
}

// Swap the modal preview between an <img> and a <video> depending on media kind.
function showPreview(src, kind) {
  const img = $('#gm-preview');
  const vid = $('#gm-preview-vid');
  if (kind === 'video') {
    img.classList.add('hidden'); img.removeAttribute('src');
    vid.src = src; vid.classList.remove('hidden');
    vid.play?.().catch(() => {});
  } else {
    vid.classList.add('hidden'); vid.pause?.(); vid.removeAttribute('src');
    img.src = src; img.classList.remove('hidden');
  }
}

function hidePreview() {
  const img = $('#gm-preview');
  const vid = $('#gm-preview-vid');
  img.classList.add('hidden'); img.removeAttribute('src');
  vid.classList.add('hidden'); vid.pause?.(); vid.removeAttribute('src');
}

// Live local preview when a file is chosen (before upload).
$('#gm-file').addEventListener('change', () => {
  const file = $('#gm-file').files[0];
  if (!file) return;
  const url = URL.createObjectURL(file);
  const isVideo = /\.(mp4|webm)$/i.test(file.name) || file.type.startsWith('video/');
  showPreview(url, isVideo ? 'video' : 'image');
});

$('#gm-save').addEventListener('click', saveGhost);

async function saveGhost() {
  const payload = {
    name: $('#gm-name').value.trim(),
    displayName: $('#gm-display').value.trim() || $('#gm-name').value.trim(),
    type: $('#gm-type').value,
    rarity: +$('#gm-rarity').value,
    health: +$('#gm-health').value,
    damage: +$('#gm-damage').value,
    speed: +$('#gm-speed').value,
    range: +$('#gm-range').value,
    chargeShot: +$('#gm-charge').value,
    ability: $('#gm-ability').value.trim() || null,
    setNumber: $('#gm-setnum').value.trim() || null,
    setName: $('#gm-setname').value.trim() || null,
    isBoss: $('#gm-boss').checked,
    enabled: $('#gm-enabled').checked,
  };
  if (!payload.name) { alert('Name is required.'); return; }

  let id = editingGhostId;
  if (id) {
    await api(`/api/admin/ghosts/${id}`, { method: 'PATCH', body: JSON.stringify(payload) });
  } else {
    const res = await api('/api/admin/ghosts', { method: 'POST', body: JSON.stringify(payload) });
    id = (await res.json()).id;
  }

  const file = $('#gm-file').files[0];
  if (file && id) {
    const fd = new FormData();
    fd.append('image', file);
    await api(`/api/admin/ghosts/${id}/image`, { method: 'POST', body: fd });
  }

  $('#ghost-modal').classList.add('hidden');
  await Promise.all([loadGhosts(), loadSets()]);
}

/* ---------- Sets ---------- */
async function loadSets() {
  const res = await api('/api/admin/sets');
  SETS = (await res.json()).sets;
  renderSets();
}

function renderSets() {
  $('#sets-list').innerHTML = SETS.map(setCard).join('') ||
    '<p class="muted">No sets yet. Create one to wire a scan code to a ghost roster.</p>';
  $$('#sets-list .edit-set').forEach((b) =>
    b.addEventListener('click', () => openSet(+b.dataset.id)));
  $$('#sets-list .del-set').forEach((b) =>
    b.addEventListener('click', () => deleteSet(+b.dataset.id)));
}

function setCard(s) {
  const chips = s.roster.map((r) =>
    `<span class="rchip"><span class="dot ${r.type}"></span>${esc(r.name)}${r.is_boss ? ' ★' : ''}</span>`
  ).join('');
  return `<div class="set-card ${s.enabled ? '' : 'off'}">
    <div class="set-head">
      <span class="code">${esc(s.code)}</span>
      <span class="sname">${esc(s.set_name)}</span>
      ${s.set_number ? `<span class="mono muted">#${esc(s.set_number)}</span>` : ''}
      <span class="grow"></span>
      <button class="edit-set" data-id="${s.id}">Edit</button>
      <button class="danger del-set" data-id="${s.id}">Delete</button>
    </div>
    <div class="set-roster">${chips || '<span class="muted">no roster</span>'}</div>
  </div>`;
}

async function deleteSet(id) {
  const s = SETS.find((x) => x.id === id);
  if (!confirm(`Delete set "${s.set_name}" (${s.code})?`)) return;
  await api(`/api/admin/sets/${id}`, { method: 'DELETE' });
  await loadSets();
}

/* set modal */
let editingSetId = null;
$('#new-set').addEventListener('click', () => openSet(null));
$('#sm-roster-search').addEventListener('input', filterRosterChecklist);

function openSet(id) {
  editingSetId = id;
  const s = id ? SETS.find((x) => x.id === id) : null;
  $('#sm-title').textContent = s ? 'Edit set' : 'New set';
  $('#sm-code').value = s?.code || '';
  $('#sm-setnum').value = s?.set_number || '';
  $('#sm-setname').value = s?.set_name || '';
  $('#sm-enabled').checked = s ? !!s.enabled : true;

  // boss dropdown
  const bossSel = $('#sm-boss');
  bossSel.innerHTML = '<option value="">— none —</option>' +
    GHOSTS.filter((g) => g.is_boss).map((g) =>
      `<option value="${g.id}">${esc(g.name)}</option>`).join('');
  bossSel.value = s?.boss_ghost_id || '';

  // roster checklist
  const selected = new Set((s?.roster || []).map((r) => r.id));
  $('#sm-roster').innerHTML = GHOSTS.map((g) =>
    `<label class="rcheck" data-name="${esc(g.name.toLowerCase())}">
      <input type="checkbox" value="${g.id}" ${selected.has(g.id) ? 'checked' : ''}>
      <span class="dot ${g.type}"></span> ${esc(g.name)} ${'★'.repeat(g.rarity)}
    </label>`).join('');
  $('#sm-roster-search').value = '';
  $('#set-modal').classList.remove('hidden');
}

function filterRosterChecklist() {
  const q = $('#sm-roster-search').value.toLowerCase();
  $$('#sm-roster .rcheck').forEach((el) => {
    el.style.display = !q || el.dataset.name.includes(q) ? '' : 'none';
  });
}

$('#sm-save').addEventListener('click', saveSet);

async function saveSet() {
  const payload = {
    code: $('#sm-code').value.trim(),
    setNumber: $('#sm-setnum').value.trim() || null,
    setName: $('#sm-setname').value.trim(),
    bossGhostId: $('#sm-boss').value ? +$('#sm-boss').value : null,
    enabled: $('#sm-enabled').checked,
  };
  if (!payload.code || !payload.setName) { alert('Scan code and set name are required.'); return; }

  let id = editingSetId;
  if (id) {
    await api(`/api/admin/sets/${id}`, { method: 'PATCH', body: JSON.stringify(payload) });
  } else {
    const res = await api('/api/admin/sets', { method: 'POST', body: JSON.stringify(payload) });
    if (res.status === 409) { alert('That scan code already exists.'); return; }
    id = (await res.json()).id;
  }

  const ghostIds = $$('#sm-roster input:checked').map((i) => +i.value);
  await api(`/api/admin/sets/${id}/roster`, { method: 'PUT', body: JSON.stringify({ ghostIds }) });

  $('#set-modal').classList.add('hidden');
  await loadSets();
}

/* ---------- Account ---------- */
$('#cp-go').addEventListener('click', async () => {
  const msg = $('#cp-msg');
  msg.classList.add('hidden'); msg.classList.remove('ok');
  const res = await api('/auth/change-password', {
    method: 'POST',
    body: JSON.stringify({
      currentPassword: $('#cp-current').value,
      newPassword: $('#cp-new').value,
    }),
  });
  const data = await res.json().catch(() => ({}));
  if (res.ok) {
    msg.textContent = 'Password updated.'; msg.classList.add('ok');
  } else {
    msg.textContent = data.error || 'Could not update password.';
  }
  msg.classList.remove('hidden');
  $('#cp-current').value = ''; $('#cp-new').value = '';
});

/* ---------- modal close ---------- */
$$('[data-close]').forEach((b) =>
  b.addEventListener('click', () => $$('.modal').forEach((m) => m.classList.add('hidden'))));
$$('.modal').forEach((m) =>
  m.addEventListener('click', (e) => { if (e.target === m) m.classList.add('hidden'); }));

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