"use strict";

function hideAll(){
  ["screen-title","screen-game","screen-gameover","screen-transition","screen-victory"].forEach(function(id){$(id).style.display="none"});
  if(animId){cancelAnimationFrame(animId);animId=null;}
}

function show(n){
  hideAll();curScreen=n;$("screen-"+n).style.display="flex";
  if(n==="title")runTitle();
  if(n==="victory")runVic();
  if(n==="game")startGame();
}

function runTitle(){
  titleHue=0;
  (function t(){if(curScreen!=="title")return;titleHue=(titleHue+1)%360;
    var e=$("title-glow");if(e)e.style.background="radial-gradient(circle at 50% 30%,hsla("+titleHue+",40%,30%,0.15) 0%,transparent 60%)";
    animId=requestAnimationFrame(t)})();
}

function runVic(){
  vicF=0;
  (function t(){if(curScreen!=="victory")return;vicF+=0.05;
    var y=Math.sin(vicF)*10;
    var g=$("v-guru"),s=$("v-stone2");
    if(g)g.style.transform="translateY("+y+"px)";
    if(s)s.style.transform="translateY("+Math.sin(vicF+1)*6+"px)";
    animId=requestAnimationFrame(t)})();
}

function showTrans(l){
  var c=LEVELS[l];
  $("tr-ln").textContent="\u201E"+c.name+"\u201C bezwungen";
  $("tr-t").textContent=c.title;
  $("tr-btn").textContent=l<2?"N\u00E4chstes Level":"Zum Finale";
  $("tr-btn").onclick=function(){if(l>=2)show("victory");else{curLvl=l+1;show("game");}};
  show("transition");
}

function showGO(reason){
  sfxLose();
  $("go-r").textContent=reason;
  $("go-retry").onclick=function(){show("game")};
  $("go-rst").onclick=function(){curLvl=0;show("game")};
  $("go-quit").onclick=function(){show("title")};
  show("gameover");
}

function startGame(){
  initGame(curLvl); frame=0; showTut=true;
  var c=LEVELS[curLvl];
  $("tut-h").textContent="Level "+(curLvl+1)+": "+c.name;
  $("tut-sc").textContent=c.stones;
  $("tut-ov").style.display="flex";
  $("tut-ov").onclick=function(){$("tut-ov").style.display="none";showTut=false;ea()};
  updateHUD(); gameLoop();
}