// Keyboard and mouse listeners.
// ---------- Input ----------
const canvas = $('game');
function isTyping(e) { const t = e.target; return t && (t.tagName === 'INPUT' || t.tagName === 'TEXTAREA' || t.tagName === 'SELECT'); }
window.addEventListener('keydown', e => {
  if (isTyping(e)) { if (e.key === 'Escape') e.target.blur(); return; }
  const k = e.key.length === 1 ? e.key.toLowerCase() : e.key;
  if (anyModal()) {
    if (k === 'Escape') { e.preventDefault(); const t = topModal(); closeModal(t); }
    else if (k === 'n' && !$('m-notebook').hidden) closeModal('m-notebook');
    return;
  }
  if (!GAME.running) return;
  if (e.key === 'Control') { GAME.ctrl = true; return; }
  if (e.ctrlKey || e.metaKey) {
    if (k === 's') { e.preventDefault(); saveWorld('main'); }
    else if (k === 'z' && !e.shiftKey) { e.preventDefault(); doUndo(); }
    return;
  }
  keys.add(k);
  if (['ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight', ' ', 'Tab'].includes(k)) e.preventDefault();
  if (e.repeat) return;
  GAME.usingPad = false;
  switch (k) {
    case '1': case '2': case '3': case '4': selectTool(+k - 1); break;
    case 'c': case 'x': hudDirty = true; break;
    case 'v': startPaste(); break;
    case 'q': if (e.shiftKey && toolId() === 'build') cycleBuildCat(-1); else cycleItem(-1); break;
    case 'e': if (e.shiftKey && toolId() === 'build') cycleBuildCat(1); else cycleItem(1); break;
    case 'r': rotate(); break;
    case 't': if (toolId() === 'vacuum') toggleCollectUnderCursor(); else if (toolId() === 'build' && piece().filter) pickFilterUnderCursor(); break;
    case 'f': doInteract(); break;
    case 'h': toggleLens(); break;
    case 'i': GAME.infoOverlay = !GAME.infoOverlay; playSfx('ui'); toast(GAME.infoOverlay ? 'Info overlay on: what every filter does, and which way belts and tubes run. I hides it.' : 'Info overlay off.'); break;
    case 'l': bot.lamp = !bot.lamp; playSfx('ui'); break;
    case 'n': openNotebook(); break;
    case 'b': openNotebook('Blueprints'); break;
    case 'm': SET.muted = !SET.muted; saveSettings(); auVolumes(); toast(SET.muted ? 'Sound muted.' : 'Sound on.'); break;
    case '[': setBrush(-1); break;
    case ']': setBrush(1); break;
    case 'Delete': if (ghostBlocks.size || ghostMachines.length || ghostMolds.length) { clearAllGhosts(); toast('Blueprint ghosts cleared.'); } break;
    case 'Escape': if (GAME.selDrag || GAME.paste) stopSelectAndPaste(); else openPause(); break;
    case 'Tab': $('bagpanel').hidden = !$('bagpanel').hidden; break;
  }
});
window.addEventListener('keyup', e => { const k = e.key.length === 1 ? e.key.toLowerCase() : e.key; keys.delete(k); if (e.key === 'Control') GAME.ctrl = false; if (k === 'c' || k === 'x') hudDirty = true; });
window.addEventListener('blur', () => { keys.clear(); GAME.lmb = GAME.rmb = false; GAME.ctrl = false; GAME.selDrag = null; endRmbRecord(); });
canvas.addEventListener('mousemove', e => { GAME.ctrl = e.ctrlKey; GAME.mouse.x = e.clientX; GAME.mouse.y = e.clientY; GAME.mouse.in = true; if (GAME.usingPad) { GAME.usingPad = false; canvas.classList.remove('nocursor'); } });
canvas.addEventListener('mouseleave', () => { GAME.mouse.in = false; });
canvas.addEventListener('contextmenu', e => e.preventDefault());
canvas.addEventListener('mousedown', e => {
  if (!GAME.running || GAME.paused) return;
  auInit();
  GAME.usingPad = false;
  if (e.button === 0) { GAME.lmb = true; primaryPress(e.shiftKey && !steering()); }
  else if (e.button === 2) { GAME.rmb = true; secondaryPress(); }
  else if (e.button === 1) { e.preventDefault(); pickUnderCursor(); }
});
window.addEventListener('mouseup', e => {
  if (e.button === 0) { GAME.ctrl = e.ctrlKey; if (GAME.lmb) primaryRelease(modShift()); GAME.lmb = false; }
  else if (e.button === 2) { GAME.rmb = false; endRmbRecord(); }
});
canvas.addEventListener('wheel', e => {
  e.preventDefault();
  if (!GAME.running || GAME.paused) return;
  const d = e.deltaY > 0 ? -1 : 1;
  if (e.shiftKey || e.ctrlKey) setBrush(d);
  else { SET.zoom = Math.max(2, Math.min(12, SET.zoom + d)); saveSettings(); resizeRender(); R.snapNext = true; }
}, { passive: false });
window.addEventListener('resize', () => { if (R.canvas) resizeRender(); });
document.addEventListener('visibilitychange', () => {
  if (!AU.ctx) return;
  if (document.hidden) { if (SET.muteUnfocused) AU.ctx.suspend(); if (GAME.running) saveWorld('auto', true); }
  else AU.ctx.resume();
});