/* teach - woorddata: algemene kaart, thema's, gedeelde woordbronnen */
/* =========================================================
   Letter game data
==========================================================*/
const DOTCODE = {
  a:[1], b:[1,2], c:[1,4], d:[1,4,5], e:[1,5], f:[1,2,4], g:[1,2,4,5], h:[1,2,5],
  i:[2,4], j:[2,4,5], k:[1,3], l:[1,2,3], m:[1,3,4], n:[1,3,4,5], o:[1,3,5],
  p:[1,2,3,4], q:[1,2,3,4,5], r:[1,2,3,5], s:[2,3,4], t:[2,3,4,5], u:[1,3,6],
  v:[1,2,3,6], w:[2,4,5,6], x:[1,3,4,6], y:[1,3,4,5,6], z:[1,3,5,6],
  /* digits use the braille number patterns (a–j) */
  "1":[1], "2":[1,2], "3":[1,4], "4":[1,4,5], "5":[1,5],
  "6":[1,2,4], "7":[1,2,4,5], "8":[1,2,5], "9":[2,4], "0":[2,4,5]
};
const VOWELS = "aeiou";
function dotGrid(letter){
  const code = DOTCODE[letter] || [];
  const grid = document.createElement("div");
  grid.className = "dots";
  [1,4,2,5,3,6].forEach(p=>{
    const d = document.createElement("i");
    d.className = code.includes(p) ? "on" : "off";
    grid.appendChild(d);
  });
  return grid;
}

/* built-in general words: ONE card per language (extendable via the editor) */
const WORDS = {
  nl:[
    ["aap","🐵"],["vis","🐟"],["zon","☀️"],["kat","🐈"],["bal","⚽"],["ei","🥚"],
    ["boom","🌳"],["huis","🏠"],["maan","🌙"],["boot","⛵"],["kip","🐔"],["muis","🐭"],
    ["boek","📕"],["ster","⭐"],["roos","🌹"],["vuur","🔥"],["fiets","🚲"],["taart","🎂"],
    ["jas","🧥"],["bril","👓"],["klok","⏰"],["peer","🍐"],["kaas","🧀"],["eend","🦆"],
    ["hand","✋"],["voet","🦶"],["neus","👃"],["oog","👁️"],["oor","👂"],["mond","👄"]
  ],
  en:[
    ["cat","🐈"],["dog","🐕"],["sun","☀️"],["egg","🥚"],["ball","⚽"],["fish","🐟"],
    ["tree","🌳"],["moon","🌙"],["boat","⛵"],["star","⭐"],["book","📕"],["cake","🎂"],
    ["house","🏠"],["mouse","🐭"],["apple","🍎"],["train","🚂"],["fire","🔥"],["rose","🌹"],
    ["bear","🐻"],["duck","🦆"],["frog","🐸"],["bee","🐝"],["cow","🐄"],["pig","🐷"],
    ["hand","✋"],["foot","🦶"],["nose","👃"],["eye","👁️"],["ear","👂"],["milk","🥛"]
  ]
};
/* teacher's own additions to the general card (persisted per user) */
let GENERAL_EXTRA = {nl:[], en:[]};
function generalList(){ return WORDS[LANG].concat(GENERAL_EXTRA[LANG]); }
const shuffle = a => { a=a.slice(); for(let i=a.length-1;i>0;i--){const j=Math.floor(Math.random()*(i+1)); [a[i],a[j]]=[a[j],a[i]];} return a; };

/* custom themes: folders of own words.
   {nl:[{name:"Herfst", words:[[word,pic],...]}], en:[...]} */
let THEMES = {nl:[], en:[]};

/* ankerbibliotheek: los van borden bewaarde ankerdiagrammen, herbruikbaar op
   elk bord. [{id, name, folder?, cells, pics}] - cells/pics in dezelfde vorm
   als de widget-staat van anchor.js; folder is een pad ("A/B") zoals bij de
   thema's en borden in de mappenverkenner. */
let ANCHOR_LIB = [];
function themesFromData(data){
  if(!data) return {nl:[],en:[]};
  if(data.themes) return data.themes;
  /* migrate old flat word lists into one theme */
  const t = {nl:[],en:[]};
  if(data.words) ["nl","en"].forEach(l=>{
    if(Array.isArray(data.words[l]) && data.words[l].length)
      t[l] = [{name: l==="nl" ? "Mijn woorden" : "My words", words: data.words[l]}];
  });
  return t;
}
const isImg = p => typeof p==="string" && (p.startsWith("data:") || p.startsWith("http"));
function setPic(el, pic){
  if(isImg(pic)){ el.innerHTML = ""; const im = document.createElement("img"); im.src = pic; im.alt=""; el.appendChild(im); }
  else el.textContent = pic;
}

/* ---- ARASAAC pictogram lookup (shared by the word editor + anchor grid) ---- */
async function arasaacSearch(term, lang){
  const resp = await fetch(`https://api.arasaac.org/api/pictograms/${lang}/search/${encodeURIComponent(term)}`);
  if(!resp.ok) throw new Error("http "+resp.status);
  return resp.json();
}
const arasaacUrl = id => `https://static.arasaac.org/pictograms/${id}/${id}_300.png`;

/* ---- shared word source (general card + themes + anchor grids) ---- */
/* anchor-word widgets register their words here so every language widget
   can use them as a theme automatically */
let ANCHORS = [];   /* [{el, name, words:[[w,pic],...]}] */
function anchorSources(){
  ANCHORS = ANCHORS.filter(a=>a.el && document.contains(a.el));
  return ANCHORS.filter(a=>a.words.length);
}
function normWordSource(card){
  if(typeof card==="string"){
    if(card.startsWith("t")){
      const th = THEMES[LANG][+card.slice(1)];
      if(th && th.words.length) return card;
    }else if(card.startsWith("a")){
      if(anchorSources()[+card.slice(1)]) return card;
    }
  }
  return "g";
}
function wordSourceList(card){
  card = normWordSource(card);
  if(card.startsWith("t")) return THEMES[LANG][+card.slice(1)].words;
  if(card.startsWith("a")) return anchorSources()[+card.slice(1)].words;
  return generalList();
}
function fillWordSourceSel(sel, card){
  sel.innerHTML = "";
  const og = document.createElement("option");
  og.value = "g"; og.textContent = T("cardGeneral");
  sel.appendChild(og);
  /* thema's zonder map bovenaan, daarna per map gegroepeerd (optgroup) -
     zelfde indeling als de theme-dropdown in de woorden-editor */
  const groups = new Map();
  THEMES[LANG].forEach((th,i)=>{
    if(!th.words.length) return;
    const f = th.folder || "";
    if(!groups.has(f)) groups.set(f, []);
    groups.get(f).push([th, i]);
  });
  const addOpt = (parent, th, i)=>{
    const o = document.createElement("option");
    o.value = "t"+i; o.textContent = "★ "+th.name;
    parent.appendChild(o);
  };
  (groups.get("") || []).forEach(([th,i])=>addOpt(sel, th, i));
  [...groups.keys()].filter(f=>f).sort().forEach(f=>{
    const grp = document.createElement("optgroup");
    grp.label = "📁 " + f;
    groups.get(f).forEach(([th,i])=>addOpt(grp, th, i));
    sel.appendChild(grp);
  });
  anchorSources().forEach((a,i)=>{
    const o = document.createElement("option");
    o.value = "a"+i; o.textContent = "⚓ "+a.name;
    sel.appendChild(o);
  });
  sel.value = normWordSource(card);
  if(sel.selectedIndex < 0) sel.selectedIndex = 0;
}

/* emoji palette (grouped) */
const splitEmoji = s => {
  const out = [];
  for(const ch of s){
    if(out.length && (ch==="️" || ch==="‍")) out[out.length-1]+=ch;
    else if(out.length && out[out.length-1].endsWith("‍")) out[out.length-1]+=ch;
    else out.push(ch);
  }
  return out;
};
const EMOJI_CATS = [
  splitEmoji("🐵🐶🐱🐭🐹🐰🦊🐻🐼🐨🐯🦁🐮🐷🐸🐔🐧🐦🦆🦉🐴🦄🐝🐛🦋🐌🐞🐠🐟🐬🐳🐢🐍🦎🐘🦒"),
  splitEmoji("🍎🍐🍊🍋🍌🍉🍇🍓🍒🍑🥝🍅🥕🌽🥔🧀🥚🍞🥐🥞🍕🍟🍦🍪🎂🍫🍬🥛🧃🍯"),
  splitEmoji("🌳🌲🌴🌵🌷🌹🌻🌸💐🍄⭐🌙☀️⛅🌈❄️🔥💧🌊🪨"),
  splitEmoji("🚗🚕🚌🚑🚒🚜🚲🛴🏍️🚂✈️🚁⛵🚀🛶🚢"),
  splitEmoji("⚽🏀🎈🎁🧸📕✏️🖍️✂️🎨🥁🎸👓⌚⏰💡🔑🧤🧢👟👗🧥🛏️🪑🚪🏠"),
  splitEmoji("✋👂👃👁️👄🦶😀😢😴🤧👶👦👧👵👴")
];