const SAINT_MALO = [48.649, -2.025];
const CATEGORY_ICONS = {
  'bouée': '🟢', 'pointe': '📍', 'plage': '🏖', 'île': '🏝',
  'port': '⚓', 'fort': '🏰', 'chenal': '🔵', 'anse': '🌊',
  'rocher': '⬛', 'autre': '📌'
};

let map, mode = 'quiz', points = [];
const editMarkers = new Map();

// Quiz state
let quizQueue = [], quizCurrent = null, quizScore = 0, quizTotal = 0;
let quizAnswered = false;
let userMarker = null, correctMarker = null, feedbackLine = null;
let pendingLatLng = null;

async function init() {
  const status = await fetch('/api/status').then(r => r.json());

  map = L.map('map', { center: SAINT_MALO, zoom: 12 });

  const src = status.hasMbtiles ? `MBTiles local (${status.name || 'SHOM'})` : 'SHOM en ligne';
  document.getElementById('tiles-status').textContent = `🗺 ${src}`;
  L.tileLayer('/tiles/{z}/{x}/{y}', {
    minZoom: 6, maxZoom: 17, attribution: '© SHOM'
  }).addTo(map);

  map.on('click', onMapClick);
  await loadPoints();
  setMode('quiz');
}

// ── Mode ────────────────────────────────────────────────────────────────────

function setMode(newMode) {
  mode = newMode;
  document.getElementById('btn-quiz').classList.toggle('active', mode === 'quiz');
  document.getElementById('btn-edit').classList.toggle('active', mode === 'edit');
  document.getElementById('quiz-panel').style.display = mode === 'quiz' ? 'flex' : 'none';
  document.getElementById('edit-panel').style.display = mode === 'edit' ? 'flex' : 'none';
  document.getElementById('map').classList.toggle('edit-cursor', mode === 'edit');

  clearFeedback();
  renderEditMarkers();

  if (mode === 'quiz') startQuiz();
}

// ── Map click ────────────────────────────────────────────────────────────────

function onMapClick(e) {
  if (mode === 'edit') {
    pendingLatLng = e.latlng;
    openModal(null);
  } else if (mode === 'quiz' && quizCurrent && !quizAnswered) {
    submitAnswer(e.latlng);
  }
}

// ── Points API ───────────────────────────────────────────────────────────────

async function loadPoints() {
  points = await fetch('/api/points').then(r => r.json());
  document.getElementById('points-count').textContent = points.length;
  renderPointsList();
  renderEditMarkers();
}

async function saveNewPoint(data) {
  const pt = await fetch('/api/points', {
    method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(data)
  }).then(r => r.json());
  return pt;
}

async function updatePoint(id, data) {
  await fetch(`/api/points/${id}`, {
    method: 'PUT', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(data)
  });
}

async function deletePoint(id) {
  if (!confirm('Supprimer ce point ?')) return;
  await fetch(`/api/points/${id}`, { method: 'DELETE' });
  await loadPoints();
}

// ── Edit markers ─────────────────────────────────────────────────────────────

function makeIcon(category) {
  return L.divIcon({
    html: `<div class="map-pin">${CATEGORY_ICONS[category] || '📌'}</div>`,
    className: '', iconSize: [24, 24], iconAnchor: [12, 12]
  });
}

function renderEditMarkers() {
  editMarkers.forEach(m => map.removeLayer(m));
  editMarkers.clear();

  if (mode !== 'edit') return;

  points.forEach(p => {
    const m = L.marker([p.lat, p.lng], { icon: makeIcon(p.category) })
      .bindTooltip(p.name, { direction: 'top' })
      .on('click', e => { L.DomEvent.stopPropagation(e); openModal(p); })
      .addTo(map);
    editMarkers.set(p.id, m);
  });
}

// ── Points list (edit panel) ──────────────────────────────────────────────────

function renderPointsList() {
  const list = document.getElementById('points-list');
  if (points.length === 0) {
    list.innerHTML = '<div class="empty-list">Aucun point encore.</div>';
    return;
  }
  list.innerHTML = points.map(p => `
    <div class="point-item">
      <span style="font-size:1.1rem;flex-shrink:0">${CATEGORY_ICONS[p.category] || '📌'}</span>
      <div class="point-item-info">
        <div class="point-item-name">${escHtml(p.name)}</div>
        <div class="point-item-cat">${p.category}</div>
      </div>
      <div class="point-item-actions">
        <button class="btn-icon" title="Centrer" onclick="flyTo('${p.id}')">🎯</button>
        <button class="btn-icon" title="Modifier" onclick="openModal(getPoint('${p.id}'))">✏️</button>
        <button class="btn-icon del" title="Supprimer" onclick="deletePoint('${p.id}')">🗑</button>
      </div>
    </div>
  `).join('');
}

function getPoint(id) { return points.find(p => p.id === id); }

function flyTo(id) {
  const p = getPoint(id);
  if (p) map.flyTo([p.lat, p.lng], 14);
}

function escHtml(s) {
  return s.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
}

// ── Modal ────────────────────────────────────────────────────────────────────

function openModal(point) {
  document.getElementById('modal-title').textContent = point ? 'Modifier le point' : 'Ajouter un point';
  document.getElementById('point-id').value = point?.id || '';
  document.getElementById('point-lat').value = point ? point.lat : (pendingLatLng?.lat || '');
  document.getElementById('point-lng').value = point ? point.lng : (pendingLatLng?.lng || '');
  document.getElementById('point-name').value = point?.name || '';
  document.getElementById('point-category').value = point?.category || 'bouée';
  document.getElementById('point-hint').value = point?.hint || '';
  document.getElementById('modal-overlay').style.display = 'flex';
  setTimeout(() => document.getElementById('point-name').focus(), 50);
}

function closeModal() {
  document.getElementById('modal-overlay').style.display = 'none';
  pendingLatLng = null;
}

function handleOverlayClick(e) {
  if (e.target === document.getElementById('modal-overlay')) closeModal();
}

document.getElementById('point-form').addEventListener('submit', async e => {
  e.preventDefault();
  const id = document.getElementById('point-id').value;
  const data = {
    name: document.getElementById('point-name').value.trim(),
    category: document.getElementById('point-category').value,
    hint: document.getElementById('point-hint').value.trim(),
    lat: parseFloat(document.getElementById('point-lat').value),
    lng: parseFloat(document.getElementById('point-lng').value)
  };
  if (id) await updatePoint(id, data);
  else await saveNewPoint(data);
  closeModal();
  await loadPoints();
});

// ── Quiz ─────────────────────────────────────────────────────────────────────

function startQuiz() {
  clearFeedback();

  if (points.length === 0) {
    show('quiz-empty'); hide('quiz-question'); hide('quiz-end');
    return;
  }

  quizQueue = shuffle([...points]);
  quizScore = 0;
  quizTotal = 0;

  hide('quiz-empty');
  show('quiz-question');
  hide('quiz-feedback');

  nextQuestion();
}

function nextQuestion() {
  clearFeedback();
  quizAnswered = false;

  if (quizQueue.length === 0) {
    quizQueue = shuffle([...points]);
  }

  quizCurrent = quizQueue.shift();
  quizTotal++;

  document.getElementById('quiz-name').textContent = quizCurrent.name;
  document.getElementById('quiz-category').textContent = quizCurrent.category;
  document.getElementById('quiz-hint').textContent = quizCurrent.hint || '';
  document.getElementById('quiz-instruction').style.display = 'block';
  hide('quiz-feedback');
  updateScoreDisplay();
}

function submitAnswer(latlng) {
  if (!quizCurrent || quizAnswered) return;
  quizAnswered = true;

  const correct = L.latLng(quizCurrent.lat, quizCurrent.lng);
  const distM = latlng.distanceTo(correct);
  const distNm = distM / 1852;

  // User click marker
  userMarker = L.circleMarker(latlng, {
    radius: 8, color: '#f39c12', fillColor: '#f39c12', fillOpacity: 0.85, weight: 2
  }).addTo(map);

  // Correct location marker
  correctMarker = L.circleMarker(correct, {
    radius: 8, color: '#2ecc71', fillColor: '#2ecc71', fillOpacity: 0.85, weight: 2
  }).bindTooltip(quizCurrent.name, { permanent: true, direction: 'top', offset: [0, -10] }).addTo(map);

  // Dashed line
  feedbackLine = L.polyline([latlng, correct], {
    color: '#fff', weight: 1.5, dashArray: '5 5', opacity: 0.4
  }).addTo(map);

  // Scoring
  let pts, label, color;
  if (distNm < 0.1)      { pts = 100; label = '⭐ Excellent !';  color = 'var(--green)'; }
  else if (distNm < 0.5) { pts = 80;  label = '👍 Très bien';    color = 'var(--green)'; }
  else if (distNm < 1.0) { pts = 60;  label = '👌 Bien';         color = 'var(--yellow)'; }
  else if (distNm < 3.0) { pts = 30;  label = '🤔 Passable';     color = 'var(--orange)'; }
  else                   { pts = 0;   label = '❌ À revoir';      color = 'var(--red)'; }

  quizScore += pts;
  updateScoreDisplay();

  const distStr = distNm < 0.1 ? `${Math.round(distM)} m` : `${distNm.toFixed(2)} Nm`;
  document.getElementById('feedback-distance').textContent = `Distance : ${distStr}`;
  document.getElementById('feedback-label').textContent = label;
  document.getElementById('feedback-label').style.color = color;
  document.getElementById('quiz-instruction').style.display = 'none';
  show('quiz-feedback');

  // Fit both points in view
  map.fitBounds(L.latLngBounds([latlng, correct]).pad(0.4), { maxZoom: 14 });
}

function clearFeedback() {
  if (userMarker)    { map.removeLayer(userMarker);    userMarker = null; }
  if (correctMarker) { map.removeLayer(correctMarker); correctMarker = null; }
  if (feedbackLine)  { map.removeLayer(feedbackLine);  feedbackLine = null; }
}

function updateScoreDisplay() {
  document.getElementById('score-value').textContent = quizScore;
  const remaining = quizQueue.length;
  document.getElementById('quiz-progress').textContent =
    `${quizTotal} / ${quizTotal + remaining} questions`;
}

// ── Utils ────────────────────────────────────────────────────────────────────

function show(id) { document.getElementById(id).style.display = ''; }
function hide(id) { document.getElementById(id).style.display = 'none'; }
function shuffle(arr) { return arr.sort(() => Math.random() - 0.5); }

document.addEventListener('keydown', e => {
  if (e.code === 'Space' || e.code === 'Enter') {
    if (mode === 'quiz' && quizAnswered) { e.preventDefault(); nextQuestion(); }
  }
});

init();