/* 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]
};
/* cijferblokken gebruikten hiervoor de braille a-j-patronen, maar die
   gebruiken nooit posities 3/6 (de onderste rij) - op een kind-oog leken
   alle tien blokken daardoor op elkaar. Een eigen codetabel die alle zes
   stippen inzet, geeft elk cijfer een echt eigen vorm. */
const DIGIT_DOTCODE = {
  "0":[], "1":[2], "2":[2,5], "3":[1,2,3], "4":[1,3,4,6],
  "5":[1,2,3,4,5], "6":[1,2,3,4,5,6], "7":[1,2,4,5], "8":[1,2,3,4,6], "9":[1,4,6]
};
/* Klassenmanagement (v0.4.34-beta e.v.): rekenen is het eerste vakgebied waarvan
   de leerlijn direct in getalgrenzen te vertalen is (SLO/TULE: groep 3
   automatiseert optellen/aftrekken t/m 20, groep 4 t/m 100, groep 5 t/m 1000,
   groep 6 t/m 10.000 met de tafels verder uitgebouwd, groep 7-8 bouwen daarop
   voort). math.js gebruikt dit als de daadwerkelijke inhoud zodra een leerling
   een groep heeft (zie mathRangeFor hieronder) - zonder groep blijft het oude,
   vaste 10/20/100-gedrag exact bestaan. */
const SLO_MATH_RANGES = {
  1:{addSub:10,   timesTable:5},
  2:{addSub:10,   timesTable:5},
  3:{addSub:20,   timesTable:5},
  4:{addSub:100,  timesTable:10},
  5:{addSub:1000, timesTable:10},
  6:{addSub:10000,timesTable:12},
  7:{addSub:10000,timesTable:12},
  8:{addSub:10000,timesTable:12},
};
/* niveau (1-3) is de verfijning BINNEN een groep - een breukdeel van de
   groep-grens, nooit onder de kleinste bestaande standaardwaarde (10) of
   onder tafel 3. Levert bij ontbrekend yearGroup expres geen waarde (math.js
   valt dan terug op zijn eigen oude vaste 10/20/100-logica). */
function mathRangeFor(yearGroup, level){
  if(yearGroup == null) return null;
  const g = SLO_MATH_RANGES[Math.max(1, Math.min(8, +yearGroup || 1))];
  if(!g) return null;
  const frac = level===1 ? .25 : level===2 ? .6 : 1;
  return {
    addSub: Math.max(10, Math.round(g.addSub*frac/5)*5),
    timesTable: Math.max(3, Math.round(g.timesTable*frac)),
  };
}
const VOWELS = "aeiou";
function dotGrid(letter){
  const code = (Object.prototype.hasOwnProperty.call(DIGIT_DOTCODE, letter) ? DIGIT_DOTCODE[letter] : 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;
}

/* De taalplaatjes hebben één centrale bron. Daardoor gebruiken de spelletjes,
   de themakiezer en de afbeeldingenbibliotheek altijd dezelfde woorden en
   verdwijnen oude plaatjes niet wanneer de woordenschat wordt uitgebreid. */
const LANGUAGE_THEME_DEFS = [
  {id:"animals", icon:"🐾", nl:"Dieren", en:"Animals", colors:["#eaf7df","#cdeeb5"]},
  {id:"food", icon:"🍎", nl:"Eten & drinken", en:"Food & drink", colors:["#fff0dc","#ffd9aa"]},
  {id:"nature", icon:"🌿", nl:"Natuur & weer", en:"Nature & weather", colors:["#e4f7ee","#bfead4"]},
  {id:"travel", icon:"🚲", nl:"Onderweg", en:"Getting around", colors:["#e6f3ff","#beddf8"]},
  {id:"home", icon:"🎒", nl:"Thuis & school", en:"Home & school", colors:["#f1ecff","#d9ccff"]},
  {id:"body", icon:"👕", nl:"Lichaam & kleding", en:"Body & clothes", colors:["#ffeaf1","#ffcbdc"]},
  {id:"actions", icon:"🏃", nl:"Doen", en:"Actions", colors:["#fff8d9","#f6e8a4"]},
  {id:"feelings", icon:"🙂", nl:"Gevoelens", en:"Feelings", colors:["#e9f5ff","#c8e4fa"]},
  {id:"people", icon:"👨‍👩‍👧", nl:"Mensen & familie", en:"People & family", colors:["#fff0f4","#ffd3df"]},
  {id:"play", icon:"🏀", nl:"Spelen & sport", en:"Play & sports", colors:["#fff4dc","#ffdca8"]},
  {id:"places", icon:"🏘️", nl:"Plekken & beroepen", en:"Places & jobs", colors:["#e8f3ff","#c9e2fb"]},
  {id:"time", icon:"📅", nl:"Tijd & feest", en:"Time & celebrations", colors:["#f2edff","#ddd1ff"]},
  {id:"arts", icon:"🎨", nl:"Kunst & muziek", en:"Arts & music", colors:["#fff0fa","#f4ccec"]},
  {id:"science", icon:"🔬", nl:"Onderzoeken & techniek", en:"Science & technology", colors:["#e7f7f5","#bfe9e3"]},
  {id:"learning", icon:"📚", nl:"Taal & rekenen", en:"Language & maths", colors:["#fff7df","#f3dfa6"]},
  {id:"society", icon:"🌍", nl:"Samenleven & wereld", en:"Society & world", colors:["#e8f1ff","#c8daf7"]}
];
const LANGUAGE_CONCEPTS = [
  ["monkey","animals","aap","monkey","🐵"],
  ["cat","animals","kat","cat","🐈"],
  ["dog","animals","hond","dog","🐕"],
  ["fish","animals","vis","fish","🐟"],
  ["hen","animals","kip","hen","🐔"],
  ["mouse","animals","muis","mouse","🐭"],
  ["bear","animals","beer","bear","🐻"],
  ["duck","animals","eend","duck","🦆"],
  ["frog","animals","kikker","frog","🐸"],
  ["bee","animals","bij","bee","🐝"],
  ["cow","animals","koe","cow","🐄"],
  ["pig","animals","varken","pig","🐷"],
  ["owl","animals","uil","owl","🦉"],
  ["goat","animals","geit","goat","🐐"],
  ["hare","animals","haas","hare","🐇"],
  ["horse","animals","paard","horse","🐴"],
  ["lion","animals","leeuw","lion","🦁"],
  ["ant","animals","mier","ant","🐜"],
  ["egg","food","ei","egg","🥚"],
  ["apple","food","appel","apple","🍎"],
  ["pear","food","peer","pear","🍐"],
  ["cheese","food","kaas","cheese","🧀"],
  ["milk","food","melk","milk","🥛"],
  ["cake","food","taart","cake","🎂"],
  ["bread","food","brood","bread","🍞"],
  ["soup","food","soep","soup","🥣"],
  ["rice","food","rijst","rice","🍚"],
  ["corn","food","mais","corn","🌽"],
  ["grape","food","druif","grape","🍇"],
  ["strawberry","food","aardbei","strawberry","🍓"],
  ["candy","food","snoep","candy","🍬"],
  ["lemon","food","citroen","lemon","🍋"],
  ["pizza","food","pizza","pizza","🍕"],
  ["juice","food","sap","juice","🧃"],
  ["cookie","food","koek","cookie","🍪"],
  ["carrot","food","wortel","carrot","🥕"],
  ["sun","nature","zon","sun","☀️"],
  ["moon","nature","maan","moon","🌙"],
  ["star","nature","ster","star","⭐"],
  ["tree","nature","boom","tree","🌳"],
  ["rose","nature","roos","rose","🌹"],
  ["fire","nature","vuur","fire","🔥"],
  ["flower","nature","bloem","flower","🌷"],
  ["leaf","nature","blad","leaf","🍃"],
  ["cloud","nature","wolk","cloud","☁️"],
  ["rain","nature","regen","rain","🌧️"],
  ["snow","nature","sneeuw","snow","❄️"],
  ["water","nature","water","water","💧"],
  ["stone","nature","steen","stone","🪨"],
  ["sand","nature","zand","sand","🏖️"],
  ["sea","nature","zee","sea","🌊"],
  ["forest","nature","bos","forest","🌲"],
  ["grass","nature","gras","grass","🌱"],
  ["wind","nature","wind","wind","💨"],
  ["rainbow","nature","regenboog","rainbow","🌈"],
  ["car","travel","auto","car","🚗"],
  ["bike","travel","fiets","bike","🚲"],
  ["boat","travel","boot","boat","⛵"],
  ["train","travel","trein","train","🚂"],
  ["bus","travel","bus","bus","🚌"],
  ["taxi","travel","taxi","taxi","🚕"],
  ["truck","travel","vrachtauto","truck","🚚"],
  ["jet","travel","vliegtuig","plane","✈️"],
  ["tram","travel","tram","tram","🚋"],
  ["ship","travel","schip","ship","🚢"],
  ["rocket","travel","raket","rocket","🚀"],
  ["road","travel","weg","road","🛣️"],
  ["wheel","travel","wiel","wheel","🛞"],
  ["sail","travel","zeil","sail","⛵"],
  ["scooter","travel","step","scooter","🛴"],
  ["tractor","travel","tractor","tractor","🚜"],
  ["helicopter","travel","helikopter","helicopter","🚁"],
  ["house","home","huis","house","🏠"],
  ["book","home","boek","book","📕"],
  ["pen","home","pen","pen","🖊️"],
  ["pencil","home","potlood","pencil","✏️"],
  ["bag","home","tas","bag","🎒"],
  ["coat","home","jas","coat","🧥"],
  ["chair","home","stoel","chair","🪑"],
  ["bed","home","bed","bed","🛏️"],
  ["door","home","deur","door","🚪"],
  ["clock","home","klok","clock","⏰"],
  ["glasses","home","bril","glasses","👓"],
  ["ball","home","bal","ball","⚽"],
  ["doll","home","pop","doll","🪆"],
  ["block","home","blok","block","🧱"],
  ["key","home","sleutel","key","🔑"],
  ["lamp","home","lamp","lamp","💡"],
  ["cup","home","beker","cup","🥤"],
  ["brush","home","borstel","brush","🪥"],
  ["drum","home","trommel","drum","🥁"],
  ["gift","home","cadeau","gift","🎁"],
  ["paint","home","verf","paint","🎨"],
  ["scissors","home","schaar","scissors","✂️"],
  ["desk","home","bureau","desk","🗄️"],
  ["school","home","school","school","🏫"],
  ["hand","body","hand","hand","✋"],
  ["foot","body","voet","foot","🦶"],
  ["nose","body","neus","nose","👃"],
  ["eye","body","oog","eye","👁️"],
  ["ear","body","oor","ear","👂"],
  ["mouth","body","mond","mouth","👄"],
  ["hair","body","haar","hair","🧑‍🦱"],
  ["head","body","hoofd","head","🙂"],
  ["arm","body","arm","arm","💪"],
  ["leg","body","been","leg","🦵"],
  ["cap","body","pet","cap","🧢"],
  ["sock","body","sok","sock","🧦"],
  ["shoe","body","schoen","shoe","👟"],
  ["dress","body","jurk","dress","👗"],
  ["shirt","body","shirt","shirt","👕"],
  ["glove","body","want","glove","🧤"],
  ["pants","body","broek","trousers","👖"],
  ["skirt","body","rok","skirt","👗"],
  ["tooth","body","tand","tooth","🦷"],
  ["read","actions","lezen","read","📖"],
  ["eat","actions","eten","eat","🍽️"],
  ["drink","actions","drinken","drink","🥤"],
  ["sleep","actions","slapen","sleep","😴"],
  ["walk","actions","lopen","walk","🚶"],
  ["swim","actions","zwemmen","swim","🏊"],
  ["jump","actions","springen","jump","🤸"],
  ["laugh","actions","lachen","laugh","😄"],
  ["cry","actions","huilen","cry","😢"],
  ["sing","actions","zingen","sing","🎤"],
  ["dance","actions","dansen","dance","💃"],
  ["draw","actions","tekenen","draw","🖍️"],
  ["write","actions","schrijven","write","✍️"],
  ["play","actions","spelen","play","🧸"],
  ["sit","actions","zitten","sit","🧎"],
  ["run","actions","rennen","run","🏃"],
  ["climb","actions","klimmen","climb","🧗"],
  ["wave","actions","zwaaien","wave","👋"],
  ["look","actions","kijken","look","👀"],
  ["think","actions","denken","think","🤔"],
  ["happy","feelings","blij","happy","😀"],
  ["sad","feelings","verdrietig","sad","😢"],
  ["angry","feelings","boos","angry","😠"],
  ["scared","feelings","bang","scared","😨"],
  ["tired","feelings","moe","tired","🥱"],
  ["sick","feelings","ziek","sick","🤒"],
  ["proud","feelings","trots","proud","😌"],
  ["calm","feelings","rustig","calm","🙂"],
  ["surprised","feelings","verrast","surprised","😮"],
  ["excited","feelings","enthousiast","excited","🤩"],
  ["bird","animals","vogel","bird","🐦"],
  ["rabbit","animals","konijn","rabbit","🐰"],
  ["fox","animals","vos","fox","🦊"],
  ["butterfly","animals","vlinder","butterfly","🦋"],
  ["snail","animals","slak","snail","🐌"],
  ["ladybird","animals","lieveheersbeestje","ladybird","🐞"],
  ["spider","animals","spin","spider","🕷️"],
  ["turtle","animals","schildpad","turtle","🐢"],
  ["dolphin","animals","dolfijn","dolphin","🐬"],
  ["elephant","animals","olifant","elephant","🐘"],
  ["giraffe","animals","giraf","giraffe","🦒"],
  ["sheep","animals","schaap","sheep","🐑"],
  ["banana","food","banaan","banana","🍌"],
  ["orange","food","sinaasappel","orange","🍊"],
  ["watermelon","food","watermeloen","watermelon","🍉"],
  ["cherry","food","kers","cherry","🍒"],
  ["tomato","food","tomaat","tomato","🍅"],
  ["potato","food","aardappel","potato","🥔"],
  ["pancake","food","pannenkoek","pancake","🥞"],
  ["honey","food","honing","honey","🍯"],
  ["chocolate","food","chocolade","chocolate","🍫"],
  ["ice","food","ijs","ice","🍦"],
  ["sandwich","food","boterham","sandwich","🥪"],
  ["yoghurt","food","yoghurt","yoghurt","🥣"],
  ["mountain","nature","berg","mountain","⛰️"],
  ["island","nature","eiland","island","🏝️"],
  ["beach","nature","strand","beach","🏖️"],
  ["river","nature","rivier","river","🏞️"],
  ["lightning","nature","bliksem","lightning","⚡"],
  ["fog","nature","mist","fog","🌫️"],
  ["autumn","nature","herfst","autumn","🍂"],
  ["spring","nature","lente","spring","🌼"],
  ["summer","nature","zomer","summer","🌞"],
  ["winter","nature","winter","winter","⛄"],
  ["seed","nature","zaad","seed","🌰"],
  ["motorcycle","travel","motor","motorcycle","🏍️"],
  ["ambulance","travel","ambulance","ambulance","🚑"],
  ["firetruck","travel","brandweerauto","firetruck","🚒"],
  ["policecar","travel","politieauto","policecar","🚓"],
  ["subway","travel","metro","subway","🚇"],
  ["canoe","travel","kano","canoe","🛶"],
  ["bridge","travel","brug","bridge","🌉"],
  ["tunnel","travel","tunnel","tunnel","🚇"],
  ["trafficlight","travel","stoplicht","trafficlight","🚦"],
  ["station","travel","station","station","🚉"],
  ["airport","travel","vliegveld","airport","🛫"],
  ["mirror","home","spiegel","mirror","🪞"],
  ["sofa","home","bank","sofa","🛋️"],
  ["toilet","home","wc","toilet","🚽"],
  ["shower","home","douche","shower","🚿"],
  ["broom","home","bezem","broom","🧹"],
  ["spoon","home","lepel","spoon","🥄"],
  ["fork","home","vork","fork","🍴"],
  ["plate","home","bord","plate","🍽️"],
  ["computer","home","computer","computer","💻"],
  ["phone","home","telefoon","phone","📱"],
  ["window","home","raam","window","🪟"],
  ["finger","body","vinger","finger","☝️"],
  ["thumb","body","duim","thumb","👍"],
  ["knee","body","knie","knee","🦵"],
  ["heart","body","hart","heart","❤️"],
  ["brain","body","hersenen","brain","🧠"],
  ["bone","body","bot","bone","🦴"],
  ["tongue","body","tong","tongue","👅"],
  ["blood","body","bloed","blood","🩸"],
  ["hat","body","hoed","hat","👒"],
  ["boot","body","laars","boot","🥾"],
  ["scarf","body","sjaal","scarf","🧣"],
  ["cook","actions","koken","cook","🧑‍🍳"],
  ["bake","actions","bakken","bake","🧁"],
  ["cycle","actions","fietsen","cycle","🚴"],
  ["drive","actions","rijden","drive","🚙"],
  ["open","actions","openen","open","📂"],
  ["close","actions","sluiten","close","📕"],
  ["wash","actions","wassen","wash","🧼"],
  ["help","actions","helpen","help","🤝"],
  ["listen","actions","luisteren","listen","👂"],
  ["smell","actions","ruiken","smell","👃"],
  ["shy","feelings","verlegen","shy","😊"],
  ["curious","feelings","nieuwsgierig","curious","🧐"],
  ["confused","feelings","verward","confused","😕"],
  ["lonely","feelings","eenzaam","lonely","😔"],
  ["friendly","feelings","vriendelijk","friendly","🙂"],
  ["brave","feelings","dapper","brave","🦸"],
  ["jealous","feelings","jaloers","jealous","😒"],
  ["bored","feelings","verveeld","bored","🥱"],
  ["relieved","feelings","opgelucht","relieved","😌"],
  ["silly","feelings","grappig","silly","🤪"],
  ["baby","people","baby","baby","👶"],
  ["child","people","kind","child","🧒"],
  ["boy","people","jongen","boy","👦"],
  ["girl","people","meisje","girl","👧"],
  ["mother","people","moeder","mother","👩"],
  ["father","people","vader","father","👨"],
  ["sister","people","zus","sister","👧"],
  ["brother","people","broer","brother","👦"],
  ["grandmother","people","oma","grandmother","👵"],
  ["grandfather","people","opa","grandfather","👴"],
  ["family","people","familie","family","👨‍👩‍👧‍👦"],
  ["friend","people","vriend","friend","🧑‍🤝‍🧑"],
  ["teacher","people","leerkracht","teacher","🧑‍🏫"],
  ["pupil","people","leerling","pupil","🧑‍🎓"],
  ["neighbor","people","buur","neighbor","🏘️"],
  ["woman","people","vrouw","woman","👩"],
  ["man","people","man","man","👨"],
  ["person","people","mens","person","🧑"],
  ["twins","people","tweeling","twins","👯"],
  ["group","people","groep","group","👥"],
  ["football","play","voetbal","football","⚽"],
  ["basketball","play","basketbal","basketball","🏀"],
  ["tennis","play","tennis","tennis","🎾"],
  ["hockey","play","hockey","hockey","🏑"],
  ["volleyball","play","volleybal","volleyball","🏐"],
  ["skating","play","schaatsen","skating","⛸️"],
  ["ski","play","ski","ski","🎿"],
  ["cycling","play","wielrennen","cycling","🚴"],
  ["running","play","hardlopen","running","🏃"],
  ["playground","play","speeltuin","playground","🛝"],
  ["bowling","play","bowlen","bowling","🎳"],
  ["slide","play","glijbaan","slide","🛝"],
  ["kite","play","vlieger","kite","🪁"],
  ["puzzle","play","puzzel","puzzle","🧩"],
  ["game","play","spel","game","🎮"],
  ["dice","play","dobbelsteen","dice","🎲"],
  ["marble","play","knikker","marble","🔵"],
  ["teddy","play","knuffel","teddy","🧸"],
  ["cards","play","kaarten","cards","🃏"],
  ["chess","play","schaken","chess","♟️"],
  ["medal","play","medaille","medal","🏅"],
  ["shop","places","winkel","shop","🏪"],
  ["bakery","places","bakkerij","bakery","🥐"],
  ["hospital","places","ziekenhuis","hospital","🏥"],
  ["doctor","places","dokter","doctor","🧑‍⚕️"],
  ["police","places","politie","police","👮"],
  ["firefighter","places","brandweer","firefighter","🧑‍🚒"],
  ["farm","places","boerderij","farm","🏡"],
  ["farmer","places","boer","farmer","🧑‍🌾"],
  ["library","places","bibliotheek","library","📚"],
  ["librarian","places","bibliothecaris","librarian","📚"],
  ["park","places","park","park","🏞️"],
  ["zoo","places","dierentuin","zoo","🦒"],
  ["museum","places","museum","museum","🏛️"],
  ["restaurant","places","restaurant","restaurant","🍽️"],
  ["kitchen","places","keuken","kitchen","🍳"],
  ["classroom","places","klas","classroom","🏫"],
  ["office","places","kantoor","office","🏢"],
  ["garage","places","garage","garage","🚗"],
  ["postman","places","postbode","postman","📬"],
  ["nurse","places","verpleegkundige","nurse","🧑‍⚕️"],
  ["dentist","places","tandarts","dentist","🦷"],
  ["builder","places","bouwer","builder","👷"],
  ["chef","places","kok","chef","🧑‍🍳"],
  ["hairdresser","places","kapper","hairdresser","💇"],
  ["market","places","markt","market","🛍️"],
  ["city","places","stad","city","🏙️"],
  ["village","places","dorp","village","🏘️"],
  ["church","places","kerk","church","⛪"],
  ["pool","places","zwembad","pool","🏊"],
  ["morning","time","ochtend","morning","🌅"],
  ["afternoon","time","middag","afternoon","🌤️"],
  ["evening","time","avond","evening","🌇"],
  ["night","time","nacht","night","🌙"],
  ["today","time","vandaag","today","📅"],
  ["tomorrow","time","morgen","tomorrow","➡️"],
  ["yesterday","time","gisteren","yesterday","⬅️"],
  ["day","time","dag","day","☀️"],
  ["week","time","week","week","🗓️"],
  ["month","time","maand","month","📆"],
  ["year","time","jaar","year","🎆"],
  ["birthday","time","verjaardag","birthday","🎂"],
  ["party","time","feest","party","🥳"],
  ["candle","time","kaars","candle","🕯️"],
  ["balloon","time","ballon","balloon","🎈"],
  ["flag","time","vlag","flag","🚩"],
  ["crown","time","kroon","crown","👑"],
  ["christmas","time","kerst","christmas","🎄"],
  ["easter","time","pasen","easter","🐣"],
  ["garland","time","slinger","garland","🎊"],
  ["calendar","time","kalender","calendar","📅"],
  ["hour","time","uur","hour","🕐"],
  ["minute","time","minuut","minute","⏱️"],
  ["season","time","seizoen","season","🍁"]
].map(([id,theme,nl,en,pic])=>({id,theme,nl,en,pic}));

/* Ruim duizend aanvullende Nederlandse woorden, geordend in woordfamilies.
   Iedere regel loopt bewust van een kort, concreet basiswoord naar langere
   afleidingen, samenstellingen en schooltaal. De positie op de regel bepaalt
   het eerste leerjaar waarin het woord wordt aangeboden; hogere leerjaren
   behouden de eerder aangeboden woorden. Woorden die al in LANGUAGE_CONCEPTS
   staan worden hieronder automatisch overgeslagen. */
const LANGUAGE_NL_PROGRESSION_FAMILIES={
 animals:"🐈|kat,poes,kitten,kater,katten,poesje,kattenbak,kattenvoer,huiskat,kattenluik,zwerfkat,kattenkwaad\n🐕|hond,pup,reu,teef,honden,pupje,hondenhok,hondenriem,waakhond,hondensport,geleidehond,hondenbezitter\n🐴|paard,pony,veulen,merrie,hengst,paardenstal,paardrijden,renpaard,paardensprong,paardentrailer,paardenverzorging,paardrijwedstrijd\n🐦|vogel,mus,merel,kraai,duif,nestje,vogelvoer,zangvogel,trekvogel,vogelkooi,vogelkenner,vogelbescherming\n🐟|vis,karper,baars,haai,rog,visje,vijvervis,zeedier,visnet,vissersboot,onderwaterdier,waterdierenverblijf\n🐞|mier,bij,wesp,kever,vlinder,rups,insectenhotel,bijenkorf,sprinkhaan,lieveheersbeestje,insectenkenner,insectenonderzoek\n🐄|koe,kalf,geit,schaap,varken,lammetje,kippenhok,melkkoe,boerderijdier,dierenweide,dierenverzorger,veehouderij",
 food:"🍞|brood,bol,toast,korst,kruimel,broodje,volkorenbrood,broodmes,bakkerij,broodbeleg,broodtrommel,broodbereiding\n🍎|fruit,appel,peer,pruim,kers,appeltje,fruitsap,fruitmand,boomgaard,vruchtvlees,fruitsoorten,fruitteeltbedrijf\n🥛|melk,karnemelk,room,boter,vla,melkpak,melkglas,zuivel,melkboer,melkproduct,zuivelfabriek,voedingsmiddel\n🧀|kaas,brie,gaten,plak,korst,kaasje,kaasplank,kaasschaaf,kaaswinkel,smeerkaas,kaasbereiding,zuivelproduct\n🥔|aardappel,friet,puree,schil,knol,pieper,aardappelmes,stamppot,aardappelveld,aardappelplant,aardappelgerecht,aardappelverwerking\n🥕|groente,wortel,prei,kool,boon,erwtje,groentesoep,snijplank,moestuin,groentekraam,groentesoorten,groentegerecht\n🍰|taart,koek,snoep,cake,wafel,gebakje,slagroom,taartpunt,bakvorm,koekjesdeeg,feestmaaltijd,suikergehalte",
 nature:"🌳|boom,stam,tak,blad,wortel,boompje,boomschors,boomkroon,loofboom,naaldboom,boomsoorten,bomenonderzoek\n🌷|bloem,roos,tulp,stengel,knop,bloempje,bloempot,bloembol,boeket,zonnebloem,bloemenweide,bloembestuiving\n💧|water,druppel,plas,sloot,beek,waterkant,drinkwater,waterput,grondwater,waterleiding,waterzuivering,waterkringloop\n☀️|zon,maan,ster,licht,schaduw,zonnetje,zonlicht,maansikkel,sterrenhemel,zonsopgang,zonnestraling,sterrenstelsel\n🌧️|regen,wolk,wind,mist,bui,regendruppel,regenjas,wolkbreuk,weersbericht,regenboog,neerslaggebied,weersverwachting\n❄️|sneeuw,ijs,vorst,hagel,vlok,sneeuwpop,ijskoud,sneeuwbal,winterweer,sneeuwstorm,temperatuurdaling,winterlandschap\n🌱|aarde,grond,zaad,kiem,plant,zaadje,potgrond,plantengroei,bodemlaag,bodemvruchtbaarheid,voedingsstoffen,kiemingsproces",
 travel:"🚗|auto,bus,taxi,rit,band,autootje,autodeur,autoruit,parkeerplek,autoweg,automobilist,verkeersveiligheid\n🚲|fiets,step,pedaal,bel,stuur,fietsje,fietspad,fietspomp,bakfiets,fietstocht,fietsenmaker,fietsverlichting\n🚂|trein,tram,rail,spoor,rit,treintje,perron,station,spoorlijn,treinreis,treinmachinist,spoorwegovergang\n⛵|boot,schip,kano,zeil,roeispaan,bootje,zeilboot,reddingsboei,haven,scheepsdek,binnenvaartschip,scheepvaartverkeer\n✈️|vliegtuig,jet,vleugel,piloot,vlucht,vliegveld,landingsbaan,luchtvaart,vliegreis,verkeerstoren,passagiersvliegtuig,luchtvaartmaatschappij\n🛣️|weg,pad,brug,tunnel,bocht,wegdek,kruispunt,rotonde,rijbaan,wegwijzer,infrastructuur,verkeersknooppunt\n🚦|licht,bord,streep,file,route,stoplicht,verkeersbord,zebrapad,voorrang,weggebruiker,verkeersregelaar,verkeerssituatie",
 home:"🏠|huis,flat,hut,dak,muur,huisje,voordeur,woonkamer,rijtjeshuis,woonwijk,huizenblok,woninginrichting\n🛏️|bed,kast,lamp,deken,kussen,bedje,nachtkast,bedlamp,slaapkamer,dekbedovertrek,slaapvertrek,slaapkamerraam\n🪑|stoel,tafel,bank,kruk,kast,stoeltje,tafelblad,eettafel,boekenkast,stoelzitting,meubelwinkel,woonkamermeubel\n🚪|deur,raam,slot,sleutel,bel,deurtje,deurklink,vensterbank,raamkozijn,voordeurbel,inbraakbeveiliging,toegangssysteem\n🍳|pan,pot,kom,bord,lepel,pannetje,koekenpan,keukenkast,aanrecht,afwasborstel,keukengerei,voedselbereiding\n🚿|bad,douche,wc,kraan,zeep,badje,handdoek,wastafel,badkamer,tandenborstel,waterbesparing,badkamertegel\n🧹|stof,vuil,bezem,dweil,spons,stofdoek,afwasmiddel,prullenbak,schoonmaak,schoonmaker,schoonmaakmiddel,huishoudelijkehulp",
 body:"✋|hand,duim,vinger,nagel,pols,handje,vingertop,handpalm,wijsvinger,vingerafdruk,handbeweging,handvaardigheid\n🦶|voet,teen,hiel,enkel,knie,voetje,voetzool,knieschijf,onderbeen,voetstap,lichaamshouding,bewegingsapparaat\n🙂|hoofd,wang,kin,nek,keel,hoofdje,voorhoofd,achterhoofd,gezicht,gezichtsvorm,gelaatsuitdrukking,hoofdbescherming\n👁️|oog,oor,neus,mond,lip,oogje,ooglid,neusgat,wenkbrauw,zintuig,gehoororgaan,waarnemingsvermogen\n🦷|tand,kies,tong,speeksel,gebit,tandje,tandvlees,tandenborstel,tandarts,mondzorg,tandheelkunde,gebitsverzorging\n👕|jas,shirt,trui,broek,rok,jasje,regenbroek,winterjas,kledingkast,kledingmaat,kledingstuk,kledingindustrie\n❤️|hart,long,bloed,bot,spier,hartslag,bloedvat,longinhoud,skelet,spierkracht,bloedsomloop,ademhalingsstelsel",
 actions:"🚶|gaan,lopen,stap,staan,zitten,wandelen,voetstap,doorlopen,oversteken,vooruitgaan,verplaatsing,bewegingsrichting\n🏃|rennen,racen,sprinten,haasten,vluchten,hardlopen,renbaan,wedloop,marathon,snelheidsmeter,hardloopwedstrijd,uithoudingsvermogen\n🤸|springen,hupsen,bukken,rollen,draaien,sprongetje,springtouw,koprol,evenwicht,lichaamsbeweging,bewegingsreeks,bewegingsoefening\n📖|lezen,boek,blad,zin,tekst,leesboek,voorlezen,leesbril,leeshoek,leesstrategie,leesvaardigheid,tekstinterpretatie\n✍️|schrijven,pen,schrift,letter,woord,opschrijven,handschrift,schrijfboek,schrijfregel,schrijfopdracht,schrijfvaardigheid,tekstproductie\n🗣️|praten,zeggen,vragen,roepen,fluisteren,vertellen,spreekbeurt,gesprek,uitspraak,woordkeuze,taalgebruik,gespreksvaardigheid\n🤝|helpen,delen,geven,halen,brengen,hulpje,samenwerken,meehelpen,ondersteunen,hulpverlening,samenwerkingsvorm,verantwoordelijkheid",
 feelings:"😀|blij,leuk,fijn,lachen,vrolijk,glimlach,plezier,opgewekt,tevreden,blijheid,enthousiasme,geluksgevoel\n😢|sip,moe,verdriet,pijn,huilen,traantje,teleurgesteld,verdrietig,somber,eenzaamheid,teleurstelling,verdrietverwerking\n😠|boos,kwaad,ruzie,mopperen,grommen,boosheid,driftig,prikkelbaar,woedend,meningsverschil,frustratie,conflictbeheersing\n😨|bang,eng,schrik,zorgen,trillen,angstig,schrikken,onzeker,bezorgd,angstgevoel,onveiligheid,zelfbescherming\n🙂|rust,kalm,stil,zacht,ademen,rustig,ontspannen,geduldig,vertrouwd,ontspanning,zelfbeheersing,ademhalingsoefening\n😌|trots,dapper,sterk,durven,winnen,trotsheid,moedig,zelfstandig,zelfvertrouwen,doorzetter,doorzettingsvermogen,zelfwaardering\n🤩|nieuw,raar,wauw,vragen,kijken,verrast,benieuwd,nieuwsgierig,verwondering,belangstelling,onderzoekshouding,ontdekkingsvreugde",
 people:"👨‍👩‍👧|familie,gezin,kind,baby,ouders,gezinnetje,familielid,stiefouder,grootouder,familieband,gezinssituatie,familiegeschiedenis\n👩|mama,moeder,vrouw,tante,dochter,moedertje,schoonmoeder,moederdag,moederfiguur,moederschap,ouderverzorging,gezinsverantwoordelijkheid\n👨|papa,vader,man,oom,zoon,vadertje,schoonvader,vaderdag,vaderfiguur,vaderschap,oudercontact,opvoedingsverantwoordelijkheid\n🧒|kind,jongen,meisje,kleuter,puber,kindje,schoolkind,leeftijdgenoot,jeugd,ontwikkeling,kinderrechten,identiteitsontwikkeling\n🧑‍🤝‍🧑|vriend,maat,buur,gast,club,vriendje,vriendschap,buurkind,kennismaking,groepsgenoot,vertrouwenspersoon,vriendschapsrelatie\n🧑‍🏫|juf,meester,leraar,mentor,coach,leerkracht,lesgever,schoolteam,begeleider,onderwijsassistent,onderwijsprofessional,leerlingbegeleiding\n👥|groep,team,klas,paar,kring,groepje,klasgenoot,teamlid,samenkomst,groepswerk,groepsvorming,groepsdynamiek",
 play:"⚽|bal,doel,trap,team,veld,balletje,voetbal,doelman,wedstrijd,voetballer,voetbaltraining,competitiewedstrijd\n🏀|basket,korf,worp,score,punt,gooien,basketbal,dribbelen,balbezit,teamsport,sportvereniging,wedstrijdreglement\n🧩|puzzel,stuk,vorm,rand,plaat,puzzelstuk,legpuzzel,denkspel,oplossing,puzzelboek,probleemoplossing,denkstrategie\n🧸|pop,beer,blok,trein,auto,popje,knuffel,bouwblok,speelgoed,speelkamer,speelgoedwinkel,fantasiespel\n🎲|spel,beurt,dobbelsteen,kaart,pion,spelletje,spelregel,bordspel,tegenstander,winnaar,spelstrategie,gezelschapsspel\n🏊|zwemmen,duiken,bad,plons,slag,zwemband,zwembad,schoolslag,duikplank,zwemles,zwemvaardigheid,waterveiligheid\n🏅|sport,spel,prijs,beker,medaille,sporter,sportdag,training,kampioen,sportprestatie,sportiviteit,wedstrijdorganisatie",
 places:"🏫|school,klas,plein,les,gym,schooltje,schoolbank,schoolplein,schoolgebouw,schooljaar,schoolorganisatie,onderwijsomgeving\n🏪|winkel,kassa,kar,mand,klant,winkeltje,winkelier,winkelstraat,boodschap,winkelcentrum,klantenservice,detailhandel\n🏥|arts,dokter,bed,zaal,zorg,ziekenhuis,verpleegkundige,wachtkamer,behandeling,zorgverlening,gezondheidszorg,ziekenhuisafdeling\n🏡|boer,stal,schuur,land,erf,boerderij,landbouwer,akkerbouw,boerenbedrijf,landbouwgrond,landbouwmachine,voedselproductie\n📚|boek,kast,balie,pas,lezer,bibliotheek,boekenkast,bibliothecaris,uitleentermijn,boekenafdeling,informatiedienst,mediatheekbeheer\n🏙️|stad,dorp,straat,plein,buurt,stadje,dorpsplein,woonplaats,stadscentrum,gemeentehuis,stedelijkgebied,bevolkingsdichtheid\n🏞️|park,bos,veld,pad,vijver,parkje,speelweide,natuurpark,wandelroute,recreatiegebied,landschapsbeheer,natuurvoorziening",
 time:"☀️|dag,uur,tijd,klok,middag,dagje,daglicht,dagdeel,dagritme,tijdstip,dagindeling,tijdswaarneming\n🌅|ochtend,vroeg,wakker,ontbijt,zonsopgang,ochtendlicht,ochtendritueel,schoolochtend,dagbegin,ochtendspits,ochtendprogramma,ochtendactiviteit\n🌇|avond,laat,eten,donker,zonsondergang,avondlicht,avondeten,bedtijd,dagafsluiting,avondprogramma,avondschemering,avondvoorstelling\n🗓️|week,maand,jaar,datum,agenda,weekje,weekdag,maandblad,jaartal,kalenderjaar,tijdrekening,kalenderindeling\n🎂|feest,taart,kaars,cadeau,ballon,feestje,verjaardag,feestmuts,feestdag,uitnodiging,feestversiering,verjaardagsviering\n🍂|lente,zomer,herfst,winter,seizoen,lentebloem,zomerdag,herfstblad,winterjas,seizoenswissel,jaargetijde,seizoensverschijnsel\n⏱️|minuut,seconde,kwart,half,duur,minuutje,tijdsduur,stopwatch,kwartier,wachttijd,tijdseenheid,tijdsberekening",
 arts:"🎨|kleur,verf,kwast,doek,palet,kleurtje,verfpot,schilderen,schilderij,kunstschilder,kleurgebruik,schildertechniek\n🖍️|tekening,lijn,vorm,punt,vak,tekenen,kleurplaat,schetsboek,omtrek,tekenmateriaal,beeldverhaal,illustratietechniek\n🎵|toon,lied,stem,klank,maat,liedje,muziek,nootbalk,melodie,muzikant,muziekstuk,muziekuitvoering\n🥁|trom,fluit,snaar,toets,bel,trommel,instrument,gitaarspel,slagwerk,muziekles,muziekinstrument,instrumentenfamilie\n💃|dans,stap,sprong,draai,pas,dansje,dansvloer,dansgroep,choreografie,dansvoorstelling,bewegingspatroon,podiumkunst\n🎭|toneel,rol,pak,tekst,podium,toneelstuk,acteur,optreden,voorstelling,toneelspeler,podiumverlichting,theatervoorstelling\n📷|foto,film,beeld,lens,flits,fotootje,camera,fotoboek,filmopname,fotograaf,beeldbewerking,mediaproductie",
 science:"🔍|kijken,zoeken,vraag,vondst,spoor,onderzoek,waarnemen,vergrootglas,ontdekking,onderzoeker,waarneming,onderzoeksresultaat\n🧪|proef,test,buis,stof,mengen,proefje,reactie,meetglas,experiment,laboratorium,proefopstelling,onderzoeksverslag\n🧲|magneet,ijzer,pool,kracht,veld,aantrekken,afstoten,magnetisch,kompasnaald,magneetkracht,magnetisme,natuurverschijnsel\n⚙️|wiel,as,tand,veer,hefboom,tandwiel,overbrenging,mechaniek,machine,werktuig,bewegingsenergie,machinewerking\n💡|licht,stroom,draad,lamp,stekker,schakelaar,batterij,stroomkring,elektrisch,elektriciteit,energieverbruik,energievoorziening\n💻|computer,muis,toets,scherm,bestand,computerprogramma,toetsenbord,beeldscherm,digitaal,internet,programmeren,informatietechnologie\n🚀|ruimte,maan,planeet,ster,raket,ruimtevaart,satelliet,heelal,astronaut,zonnestelsel,ruimtestation,ruimteonderzoek",
 learning:"🔤|letter,klank,woord,naam,teken,alfabet,lettergreep,klinker,medeklinker,lettervolgorde,klankstructuur,spellingspatroon\n📝|zin,punt,komma,vraag,tekst,zinnetje,hoofdletter,leesteken,zinsdeel,zinsbouw,tekstverband,taalbeschouwing\n📖|boek,blad,kaft,titel,prent,boekje,hoofdstuk,inhoudsopgave,schrijver,boekbespreking,literatuur,leeservaring\n🗣️|taal,stem,spraak,gesprek,verhaal,vertellen,luisteraar,spreker,spreekbeurt,gespreksregel,taalgebruik,communicatievaardigheid\n🔢|nul,een,twee,drie,getal,cijfer,reeks,getallenlijn,getalbeeld,plaatswaarde,getalstructuur,getalnotatie\n➕|som,plus,min,keer,delen,optellen,aftrekken,uitkomst,bewerking,rekenregel,rekenstrategie,bewerkingsvolgorde\n📐|vorm,lijn,hoek,vlak,lengte,driehoek,rechthoek,meetlat,oppervlakte,omtrekberekening,meetinstrument,meetkundigevorm",
 society:"🤝|samen,hulp,beurt,afspraak,regel,samenwerken,overleggen,taakverdeling,deelname,samenleving,samenwerkingsverband,maatschappijleer\n🏘️|buurt,wijk,dorp,stad,straat,buurthuis,woonwijk,gemeente,provincie,stadsbestuur,gemeenteraad,gebiedsindeling\n🌍|wereld,land,zee,kaart,grens,wereldbol,landkaart,continent,werelddeel,bevolking,wereldbevolking,wereldburgerschap\n🗺️|noord,zuid,oost,west,plek,richting,kompas,kaartteken,plattegrond,schaalverdeling,herkenningspunt,kaartvaardigheid\n📰|nieuws,krant,bericht,radio,media,nieuwsblad,journalist,nieuwsbron,actualiteit,nieuwsbericht,betrouwbaarheid,mediageletterdheid\n♻️|afval,bak,glas,papier,natuur,recyclen,hergebruik,afvalbak,milieuzorg,afvalscheiding,duurzaamheid,grondstoffengebruik\n⚖️|recht,plicht,keus,stem,wet,eerlijk,verkiezing,mening,besluit,democratie,grondrecht,besluitvorming"
};
const LANGUAGE_PROGRESSION_YEARS=[1,2,3,3,4,5,5,6,7,8,7,8];
const LANGUAGE_NL_PROGRESSION_WORDS=(()=>{
 const seen=new Set(LANGUAGE_CONCEPTS.map(item=>item.nl)),out=[];
 Object.entries(LANGUAGE_NL_PROGRESSION_FAMILIES).forEach(([theme,rows])=>rows.split("\n").forEach(row=>{
  const [pic,list]=row.split("|");let familyPosition=0;
  list.split(",").forEach(raw=>{
   const word=raw.trim();if(!word||seen.has(word))return;seen.add(word);
   const slug=word.normalize("NFD").replace(/[\u0300-\u036f]/g,"").replace(/[^a-z]/g,"");
   const yearGroup=LANGUAGE_PROGRESSION_YEARS[Math.min(familyPosition++,LANGUAGE_PROGRESSION_YEARS.length-1)];
   out.push({id:"nl-"+theme+"-"+slug,theme,nl:word,pic,yearGroup});
  });
 }));
 return out
})();

/* De vertrouwde startkaart blijft exact dezelfde 30 woorden houden. */
const START_WORD_KEYS = {
  nl:["monkey","fish","sun","cat","ball","egg","tree","house","moon","boat","hen","mouse","book","star","rose","fire","bike","cake","coat","glasses","clock","pear","cheese","duck","hand","foot","nose","eye","ear","mouth"],
  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"]
};
const WORDS = Object.fromEntries(["nl","en"].map(lang=>[
  lang, START_WORD_KEYS[lang].map(id=>{
    const concept=LANGUAGE_CONCEPTS.find(item=>item.id===id);
    return [concept[lang],concept.pic];
  })
]));

function languageBuiltinWords(lang=LANG){
 return lang==="nl"?LANGUAGE_CONCEPTS.concat(LANGUAGE_NL_PROGRESSION_WORDS):LANGUAGE_CONCEPTS
}
function languageThemeList(lang=LANG){
  return LANGUAGE_THEME_DEFS.map(theme=>({
    ...theme,
    name:theme[lang],
    words:languageBuiltinWords(lang).filter(item=>item.theme===theme.id)
      .map(item=>[item[lang]||item.nl,item.pic,item.yearGroup||null])
  })).filter(theme=>theme.words.length);
}
function languageEmojiDataUrl(emoji,colors=["#f4f8ff","#dce9fa"]){
  const svg=`<svg xmlns="http://www.w3.org/2000/svg" width="320" height="320" viewBox="0 0 320 320"><defs><linearGradient id="g" x2="1" y2="1"><stop stop-color="${colors[0]}"/><stop offset="1" stop-color="${colors[1]}"/></linearGradient></defs><rect width="320" height="320" rx="48" fill="url(#g)"/><circle cx="160" cy="160" r="112" fill="#fff" opacity=".92"/><text x="160" y="177" text-anchor="middle" dominant-baseline="middle" font-family="Apple Color Emoji,Segoe UI Emoji,Noto Color Emoji,sans-serif" font-size="148">${emoji}</text></svg>`;
  return "data:image/svg+xml;charset=utf-8,"+encodeURIComponent(svg);
}
function languagePictureCatalog(lang=LANG){
  const builtinThemes=languageThemeList(lang).map((theme,index)=>({
    id:-200-index,nameNl:theme.nl,nameEn:theme.en,scope:"global",filterOnly:true,
    languageBuiltin:true,wordPicture:true,icon:theme.icon
  }));
  const themeIds=new Map(LANGUAGE_THEME_DEFS.map((theme,index)=>[theme.id,-200-index]));
  const images=languageBuiltinWords(lang).map((item,index)=>{
    const theme=LANGUAGE_THEME_DEFS.find(def=>def.id===item.theme);
    const name=item[lang]||item.nl;
    return {
      id:-1000-index,name,folder:`Taal/Woordenschat/${theme[lang]}`,
      scope:"global",themes:[themeIds.get(item.theme)],tags:[item.nl,item.en,theme.nl,theme.en].filter(Boolean),
      src:languageEmojiDataUrl(item.pic,theme.colors),value:item.pic,canManage:false,canDelete:false,
      wordPicture:true,builtin:true,yearGroup:item.yearGroup||null
    };
  });
  const ownThemes=[];
  const customImages=[];
  let customId=-5000;
  const addOwn=(words,name,folder,themeId)=>{
    (words||[]).forEach(([word,pic])=>{
      if(!word||!pic)return;
      customImages.push({
        id:customId--,name:word,folder,scope:"personal",themes:[themeId],tags:[word,name],
        src:isImg(pic)?pic:languageEmojiDataUrl(pic),value:pic,canManage:false,canDelete:false,
        wordPicture:true,builtin:false
      });
    });
  };
  const generalThemeId=-400;
  ownThemes.push({id:generalThemeId,nameNl:"Mijn woordkaarten",nameEn:"My word cards",scope:"personal",filterOnly:true,wordPicture:true,icon:"⭐"});
  addOwn(GENERAL_EXTRA[lang],lang==="nl"?"Mijn woordkaarten":"My word cards","Taal/Mijn woordkaarten",generalThemeId);
  THEMES[lang].forEach((theme,index)=>{
    const id=-401-index;
    ownThemes.push({id,nameNl:theme.name,nameEn:theme.name,scope:"personal",filterOnly:true,wordPicture:true,icon:"📁"});
    addOwn(theme.words,theme.name,["Taal/Mijn thema’s",theme.folder,theme.name].filter(Boolean).join("/"),id);
  });
  return {themes:builtinThemes.concat(ownThemes),images:images.concat(customImages)};
}
/* 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" && /^(?:data:|https?:|blob:|\/)/.test(p);
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("b:")){
      if(languageThemeList().some(theme=>theme.id===card.slice(2))) return card;
    }else 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("b:")) return languageThemeList().find(theme=>theme.id===card.slice(2)).words;
  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("cardStart");
  sel.appendChild(og);
  const builtinGroup = document.createElement("optgroup");
  builtinGroup.label = "📚 "+T("wordThemes");
  languageThemeList().forEach(theme=>{
    const option=document.createElement("option");
    option.value="b:"+theme.id;
    option.textContent=`${theme.icon} ${theme.name} (${theme.words.length})`;
    builtinGroup.appendChild(option);
  });
  sel.appendChild(builtinGroup);
  /* 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("✋👂👃👁️👄🦶😀😢😴🤧👶👦👧👵👴")
];