// ---------- Timeline d'animation : piste par élément, clips Animate.css ou
// personnalisés (images-clés), glissés/redimensionnés à la souris sur un
// axe du temps en secondes depuis l'affichage de l'écran. Même principe de
// panneau rétractable/redimensionnable que "Logique de la scène"
// ci-dessus, positionné juste en dessous. ----------

// ANIM_CLIPS/ANIMATE_CSS_LABELS/GAME_SLUG : voir le petit <script> inline
// en tête de screen_edit.html (données Jinja).
var ANIM_SCREEN_ID = SCREEN_ID;
var ANIM_PX_PER_SEC = 60;
var animCurrentClipId = null;
// Phase 7 — aperçu d'un clip "sprite" dans l'éditeur (voir previewAnimClip
// ci-dessous) : un intervalle à la fois suffit ici (contrairement au
// moteur de jeu, static/js/play/actions.js, PAS chargé sur cette page —
// runSpriteAnimation()/activeSpriteAnimations n'existent que côté jeu).
var animPreviewSpriteInterval = null;

function animUrl(path) { return "/game/" + GAME_SLUG + path; }

function animClipLabel(clip) {
  if (clip.kind === 'custom') return '🎨 Personnalisée';
  if (clip.kind === 'sprite') return '🏃 Sprite';
  return '🎞️ ' + (ANIMATE_CSS_LABELS[clip.animate_name] || clip.animate_name);
}

function renderAnimTimeline() {
  var lanesWrap = document.getElementById('animTracks');
  var ticksWrap = document.getElementById('animRuler');
  if (!lanesWrap || !ticksWrap) return;
  lanesWrap.innerHTML = '';
  ticksWrap.innerHTML = '';

  var maxTime = ANIM_CLIPS.reduce(function(m, c) { return Math.max(m, (c.start_time || 0) + (c.duration || 1)); }, 5);
  var totalSeconds = Math.ceil(maxTime) + 2;
  var totalWidth = totalSeconds * ANIM_PX_PER_SEC;

  var spacer = document.createElement('div');
  spacer.className = 'animRulerSpacer';
  ticksWrap.appendChild(spacer);
  var ticksLane = document.createElement('div');
  ticksLane.className = 'animRulerTicksWrap';
  ticksLane.style.width = totalWidth + 'px';
  for (var s = 0; s <= totalSeconds; s++) {
    var tick = document.createElement('div');
    tick.className = 'animRulerTick';
    tick.style.left = (s * ANIM_PX_PER_SEC) + 'px';
    tick.textContent = s + 's';
    ticksLane.appendChild(tick);
  }
  ticksWrap.appendChild(ticksLane);

  var elementIds = [];
  ANIM_CLIPS.forEach(function(c) { if (elementIds.indexOf(c.element_id) === -1) elementIds.push(c.element_id); });

  if (!elementIds.length) {
    var empty = document.createElement('p');
    empty.className = 'hint';
    empty.style.padding = '10px 0';
    empty.textContent = "Aucun clip pour l'instant — choisis un élément ci-dessus et clique « Ajouter un clip ».";
    lanesWrap.appendChild(empty);
    return;
  }

  elementIds.forEach(function(elId) {
    var track = document.createElement('div');
    track.className = 'animTrack';

    var label = document.createElement('div');
    label.className = 'animTrackLabel';
    label.textContent = ELEMENTS_LABELS[elId] || ('elt-' + elId);
    track.appendChild(label);

    var lane = document.createElement('div');
    lane.className = 'animTrackLane';
    lane.style.width = totalWidth + 'px';

    ANIM_CLIPS.filter(function(c) { return c.element_id === elId; }).forEach(function(clip) {
      var block = document.createElement('div');
      block.className = 'animClip';
      block.style.left = ((clip.start_time || 0) * ANIM_PX_PER_SEC) + 'px';
      block.style.width = Math.max(24, (clip.duration || 1) * ANIM_PX_PER_SEC) + 'px';
      block.textContent = animClipLabel(clip);
      block.dataset.clipId = clip.id;
      block.addEventListener('mousedown', function(e) { onAnimClipMouseDown(e, clip.id); });
      var handle = document.createElement('div');
      handle.className = 'animClipResizeHandle';
      handle.addEventListener('mousedown', function(e) { onAnimClipResizeMouseDown(e, clip.id); });
      block.appendChild(handle);
      lane.appendChild(block);
    });

    track.appendChild(lane);
    lanesWrap.appendChild(track);
  });
}

function onAnimClipMouseDown(e, clipId) {
  if (e.target.classList.contains('animClipResizeHandle')) return;
  e.preventDefault();
  e.stopPropagation();
  var clip = ANIM_CLIPS.find(function(c) { return c.id === clipId; });
  var block = document.querySelector('.animClip[data-clip-id="' + clipId + '"]');
  var startX = e.clientX;
  var startLeft = parseFloat(block.style.left);
  var moved = false;
  function onMove(ev) {
    var dx = ev.clientX - startX;
    if (Math.abs(dx) > 3) moved = true;
    block.style.left = Math.max(0, startLeft + dx) + 'px';
  }
  function onUp() {
    document.removeEventListener('mousemove', onMove);
    document.removeEventListener('mouseup', onUp);
    if (moved) {
      var newStart = Math.round((parseFloat(block.style.left) / ANIM_PX_PER_SEC) * 10) / 10;
      clip.start_time = newStart;
      updateAnimClip(clipId, { start_time: newStart });
    } else {
      openAnimClipForm(clip);
    }
  }
  document.addEventListener('mousemove', onMove);
  document.addEventListener('mouseup', onUp);
}

function onAnimClipResizeMouseDown(e, clipId) {
  e.preventDefault();
  e.stopPropagation();
  var clip = ANIM_CLIPS.find(function(c) { return c.id === clipId; });
  var block = document.querySelector('.animClip[data-clip-id="' + clipId + '"]');
  var startX = e.clientX;
  var startWidth = parseFloat(block.style.width);
  function onMove(ev) {
    var dx = ev.clientX - startX;
    block.style.width = Math.max(10, startWidth + dx) + 'px';
  }
  function onUp() {
    document.removeEventListener('mousemove', onMove);
    document.removeEventListener('mouseup', onUp);
    var newDuration = Math.round((parseFloat(block.style.width) / ANIM_PX_PER_SEC) * 10) / 10;
    clip.duration = newDuration;
    updateAnimClip(clipId, { duration: newDuration });
  }
  document.addEventListener('mousemove', onMove);
  document.addEventListener('mouseup', onUp);
}

function updateAnimClip(clipId, fields) {
  return fetch(animUrl('/animations/clips/' + clipId + '/update'), {
    method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(fields)
  }).then(function(r) { return r.json(); }).then(function(updated) {
    var idx = ANIM_CLIPS.findIndex(function(c) { return c.id === updated.id; });
    if (idx > -1) ANIM_CLIPS[idx] = updated;
    return updated;
  });
}

function addAnimTrack() {
  var elId = parseInt(document.getElementById('anim-new-track-element').value, 10);
  fetch(animUrl('/screens/' + ANIM_SCREEN_ID + '/animations/clips/add'), {
    method: 'POST', headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ element_id: elId, kind: 'animate_css', animate_name: 'fadeIn', start_time: 0, duration: 1 }),
  }).then(function(r) { return r.json(); }).then(function(clip) {
    ANIM_CLIPS.push(clip);
    renderAnimTimeline();
    openAnimClipForm(clip);
  });
}

function toggleAnimClipKind() {
  var kind = document.getElementById('anim-clip-kind').value;
  document.getElementById('anim-clip-animate-css-fields').style.display = kind === 'animate_css' ? 'block' : 'none';
  document.getElementById('anim-clip-custom-fields').style.display = kind === 'custom' ? 'block' : 'none';
  document.getElementById('anim-clip-sprite-fields').style.display = kind === 'sprite' ? 'block' : 'none';
  if (kind === 'sprite') populateAnimClipSpriteGrid();
}

// Phase 8 — mirror de onSpriteTargetElementChange() (flow-editor.js), mais
// scopé au personnage PROPRIÉTAIRE de ce clip (clip.element_id, fixé à la
// création — voir addAnimTrack()) : pas de sélecteur d'élément séparé ici,
// contrairement au nœud de flow (une action peut viser n'importe quel
// personnage, un clip appartient à un seul élément dès sa création).
function populateAnimClipSpriteGrid(preselectedName) {
  var grid = document.getElementById('anim-clip-sprite-animation-grid');
  var nameField = document.getElementById('anim-clip-sprite-animation-name');
  var noAnimHint = document.getElementById('anim-clip-sprite-no-animations');
  grid.innerHTML = '';
  var clip = ANIM_CLIPS.find(function(c) { return c.id === animCurrentClipId; });
  var animations = clip ? (ELEMENT_ANIMATIONS_MAP[clip.element_id] || {}) : {};
  var hasAnimations = Object.keys(animations).length > 0;
  noAnimHint.style.display = hasAnimations ? 'none' : 'block';
  Object.keys(animations).forEach(function(animName) {
    var frames = animations[animName];
    if (!frames.length) return;
    var tile = document.createElement('button');
    tile.type = 'button';
    tile.className = 'iconGalleryTile' + (animName === preselectedName ? ' selected' : '');
    tile.title = animName;
    tile.innerHTML = '<img src="' + frames[0] + '" alt="" class="personnageThumb">';
    tile.onclick = function() {
      grid.querySelectorAll('.iconGalleryTile').forEach(function(t) { t.classList.remove('selected'); });
      tile.classList.add('selected');
      nameField.value = animName;
      // Vitesse par défaut proportionnelle au nombre d'images — voir le
      // même correctif dans onSpriteTargetElementChange() (flow-editor.js).
      var fpsField = document.getElementById('anim-clip-sprite-fps');
      if (fpsField) fpsField.value = Math.max(8, Math.min(24, frames.length));
    };
    grid.appendChild(tile);
  });
  if (preselectedName && animations[preselectedName]) nameField.value = preselectedName;
}

function addAnimKeyframeRow(percent, cssText) {
  var wrap = document.getElementById('anim-clip-keyframes');
  var row = document.createElement('div');
  row.className = 'fieldRow animKeyframeRow';
  var percentInput = document.createElement('input');
  percentInput.type = 'number'; percentInput.min = '0'; percentInput.max = '100'; percentInput.step = '1';
  percentInput.className = 'anim-kf-percent'; percentInput.style.flex = '0 0 70px';
  percentInput.value = percent != null ? percent : 0;
  var cssInput = document.createElement('textarea');
  cssInput.className = 'anim-kf-css'; cssInput.style.flex = '1'; cssInput.rows = 2;
  cssInput.placeholder = 'ex. opacity: 0; transform: scale(0.5);';
  cssInput.value = cssText || '';
  var removeBtn = document.createElement('button');
  removeBtn.type = 'button'; removeBtn.className = 'smallBtn danger';
  removeBtn.textContent = '✕';
  removeBtn.onclick = function() { row.remove(); };
  row.appendChild(percentInput);
  row.appendChild(cssInput);
  row.appendChild(removeBtn);
  wrap.appendChild(row);
}

function collectAnimKeyframes() {
  var rows = document.querySelectorAll('#anim-clip-keyframes .animKeyframeRow');
  var keyframes = [];
  rows.forEach(function(row) {
    var percent = parseFloat(row.querySelector('.anim-kf-percent').value) || 0;
    var cssText = row.querySelector('.anim-kf-css').value;
    var props = {};
    cssText.split(';').forEach(function(decl) {
      var parts = decl.split(':');
      if (parts.length === 2) {
        var prop = parts[0].trim(), val = parts[1].trim();
        if (prop && val) props[prop] = val;
      }
    });
    keyframes.push({ percent: percent, props: props });
  });
  return keyframes;
}

function openAnimClipForm(clip) {
  animCurrentClipId = clip.id;
  document.getElementById('animClipForm').style.display = 'block';
  document.getElementById('animClipFormTitle').textContent = 'Clip — ' + (ELEMENTS_LABELS[clip.element_id] || ('elt-' + clip.element_id));
  document.getElementById('anim-clip-kind').value = clip.kind || 'animate_css';
  document.getElementById('anim-clip-animate-name').value = clip.animate_name || 'fadeIn';
  document.getElementById('anim-clip-start').value = clip.start_time || 0;
  document.getElementById('anim-clip-duration').value = clip.duration || 1;
  document.getElementById('anim-clip-delay').value = clip.delay || 0;
  document.getElementById('anim-clip-easing').value = clip.easing || 'ease';
  document.getElementById('anim-clip-iteration').value = clip.iteration_count || '1';
  document.getElementById('anim-clip-keyframes').innerHTML = '';
  var keyframes = [];
  if (clip.custom_keyframes) {
    try { keyframes = JSON.parse(clip.custom_keyframes); } catch (e) { /* ignore */ }
  }
  if (!keyframes.length) keyframes = [{ percent: 0, props: { opacity: '0' } }, { percent: 100, props: { opacity: '1' } }];
  keyframes.forEach(function(k) {
    var cssText = Object.keys(k.props || {}).map(function(p) { return p + ': ' + k.props[p] + ';'; }).join(' ');
    addAnimKeyframeRow(k.percent, cssText);
  });
  // Phase 8 — clip.custom_keyframes stocke {animation, fps} en JSON pour un
  // clip kind="sprite" (pas une liste d'images-clés CSS, voir ci-dessus) :
  // le NOM de l'animation, pas ses frames — résolues à l'exécution depuis
  // le personnage ACTUELLEMENT assigné (voir resolveSpriteFrames() dans
  // static/js/play/actions.js), jamais figées ici.
  var spriteData = {};
  if (clip.kind === 'sprite' && clip.custom_keyframes) {
    try { spriteData = JSON.parse(clip.custom_keyframes); } catch (e) { /* ignore */ }
  }
  document.getElementById('anim-clip-sprite-fps').value = spriteData.fps || 8;
  toggleAnimClipKind();
  if (clip.kind === 'sprite') populateAnimClipSpriteGrid(spriteData.animation);
  document.querySelectorAll('.animClip').forEach(function(b) {
    b.classList.toggle('selected', parseInt(b.dataset.clipId, 10) === clip.id);
  });
}

function closeAnimClipForm() {
  animCurrentClipId = null;
  document.getElementById('animClipForm').style.display = 'none';
  document.querySelectorAll('.animClip').forEach(function(b) { b.classList.remove('selected'); });
}

function saveAnimClipForm() {
  if (!animCurrentClipId) return Promise.resolve();
  var kind = document.getElementById('anim-clip-kind').value;
  var fields = {
    kind: kind,
    animate_name: document.getElementById('anim-clip-animate-name').value,
    start_time: parseFloat(document.getElementById('anim-clip-start').value) || 0,
    duration: parseFloat(document.getElementById('anim-clip-duration').value) || 1,
    delay: parseFloat(document.getElementById('anim-clip-delay').value) || 0,
    easing: document.getElementById('anim-clip-easing').value,
    iteration_count: document.getElementById('anim-clip-iteration').value,
  };
  if (kind === 'custom') fields.custom_keyframes = collectAnimKeyframes();
  if (kind === 'sprite') {
    // Phase 8 — stocke le NOM de l'animation choisie (miniature cliquée,
    // voir populateAnimClipSpriteGrid()), PAS ses frames — résolues à
    // l'exécution depuis le personnage ACTUELLEMENT assigné (voir
    // resolveSpriteFrames() dans static/js/play/actions.js), pour que
    // changer de personnage Forge affecte aussi les clips déjà posés dans
    // la Timeline. La boucle reste portée par iteration_count
    // (1/2/3/infinite, ci-dessus).
    fields.custom_keyframes = {
      animation: document.getElementById('anim-clip-sprite-animation-name').value,
      fps: parseInt(document.getElementById('anim-clip-sprite-fps').value, 10) || 8,
    };
  }
  return updateAnimClip(animCurrentClipId, fields).then(function() { renderAnimTimeline(); });
}

function deleteAnimClipForm() {
  if (!animCurrentClipId) return;
  if (!confirm('Supprimer ce clip ?')) return;
  var id = animCurrentClipId;
  fetch(animUrl('/animations/clips/' + id + '/delete'), { method: 'POST' }).then(function() {
    ANIM_CLIPS = ANIM_CLIPS.filter(function(c) { return c.id !== id; });
    closeAnimClipForm();
    renderAnimTimeline();
  });
}

function previewAnimClip() {
  if (!animCurrentClipId) return;
  saveAnimClipForm().then(function() {
    var clip = ANIM_CLIPS.find(function(c) { return c.id === animCurrentClipId; });
    if (!clip) return;
    var target = document.querySelector('#canvas [data-anim-target="' + clip.element_id + '"]');
    if (!target) return;
    var duration = clip.duration || 1, delay = clip.delay || 0;
    var iterationCount = clip.iteration_count || '1';
    if (clip.kind === 'custom') {
      var keyframes = [];
      try { keyframes = JSON.parse(clip.custom_keyframes || '[]'); } catch (e) { /* ignore */ }
      var steps = keyframes.map(function(k) {
        var props = Object.keys(k.props || {}).map(function(p) { return p + ':' + k.props[p] + ';'; }).join(' ');
        return k.percent + '% { ' + props + ' }';
      }).join(' ');
      var styleTag = document.getElementById('animEditorPreviewStyle');
      if (!styleTag) {
        styleTag = document.createElement('style');
        styleTag.id = 'animEditorPreviewStyle';
        document.head.appendChild(styleTag);
      }
      styleTag.textContent = '@keyframes animEditorPreview { ' + steps + ' }';
      target.style.animation = 'animEditorPreview ' + duration + 's ' + (clip.easing || 'ease') + ' ' + delay + 's ' + iterationCount;
      target.addEventListener('animationend', function handler() {
        target.style.animation = '';
        target.removeEventListener('animationend', handler);
      });
    } else if (clip.kind === 'sprite') {
      var spriteData = {};
      try { spriteData = JSON.parse(clip.custom_keyframes || '{}'); } catch (e) { /* ignore */ }
      // Phase 8 — résout le NOM de l'animation depuis les animations
      // ACTUELLES du personnage (même logique que resolveSpriteFrames()
      // côté jeu, mais ELEMENT_ANIMATIONS_MAP n'existe que dans l'éditeur).
      var ownerAnimations = ELEMENT_ANIMATIONS_MAP[clip.element_id] || {};
      var frames = ownerAnimations[spriteData.animation] || [];
      var fps = spriteData.fps > 0 ? spriteData.fps : 8;
      if (animPreviewSpriteInterval) { clearInterval(animPreviewSpriteInterval); animPreviewSpriteInterval = null; }
      if (frames.length) {
        var frameIndex = 0;
        target.src = frames[0];
        if (frames.length > 1) {
          animPreviewSpriteInterval = setInterval(function() {
            frameIndex = (frameIndex + 1) % frames.length;
            target.src = frames[frameIndex];
          }, 1000 / fps);
        }
      }
    } else {
      var animClass = 'animate__' + clip.animate_name;
      target.style.setProperty('--animate-duration', duration + 's');
      target.style.setProperty('--animate-delay', delay + 's');
      target.style.animationIterationCount = iterationCount;
      target.classList.add('animate__animated', animClass);
      target.addEventListener('animationend', function handler() {
        target.classList.remove('animate__animated', animClass);
        target.removeEventListener('animationend', handler);
      });
    }
  });
}

// Panneau timeline absent sur un écran-modèle (élément de jeu), comme le
// panneau de logique — voir le commentaire Jinja au-dessus de .builderTabs.
var HAS_ANIM_PANEL = !!document.getElementById('animTabPanel');
if (HAS_ANIM_PANEL) { renderAnimTimeline(); }