<!-- JS -->
<script>
(function(){
let currentLanguage = 'nepali';

/* --- Mappings --- */
const consonantMap = {
  'ksh':'क्ष','kshh':'क्ष','gya':'ज्ञ','gna':'ज्ञ','tra':'त्र',
  'chh':'छ','shh':'ष',
  'ng':'ङ','ny':'ञ','jh':'झ','ph':'फ','bh':'भ','th':'थ','dh':'ध',
  'kh':'ख','gh':'घ','ch':'च','sh':'श',
  'ts':'त्स',
  'k':'क','g':'ग','c':'क','j':'ज','t':'त','d':'द','n':'न',
  'p':'प','b':'ब','m':'म','y':'य','r':'र','l':'ल','v':'व','w':'व','s':'स','h':'ह','f':'फ़',
  'T':'ट','Th':'ठ','D':'ड','Dh':'ढ','N':'ण'
};
const vowelMap = { 'aa':'आ','a':'अ','ii':'ई','i':'इ','uu':'ऊ','u':'उ','e':'ए','ai':'ऐ','o':'ओ','au':'औ','ri':'ऋ','ru':'ऋ' };
const matraMap = { 'aa':'ा','a':'','ii':'ी','i':'ि','uu':'ू','u':'ु','e':'े','ai':'ै','o':'ो','au':'ौ','ri':'ृ','ru':'ृ' };
const digitsMap = {'0':'०','1':'१','2':'२','3':'३','4':'४','5':'५','6':'६','7':'७','8':'८','9':'९'};
const specialMap = {'om':'ॐ','aum':'ॐ','.':'.',',':',','?':'?','!':'!',':':':',';':';'};

/* Examples */
const examples = {
  hindi: [
    { rom: 'namaste', dev: 'नमस्ते' },
    { rom: 'dhanyawad', dev: 'धन्यवाद' },
    { rom: 'main tumse pyar karta hun', dev: 'मैं तुमसे प्यार करता हूँ' },
    { rom: 'kaise ho', dev: 'कैसे हो' },
    { rom: 'mera naam rahul hai', dev: 'मेरा नाम राहुल है' },
    { rom: 'aap kahan se hain', dev: 'आप कहाँ से हैं' },
    { rom: 'bahut accha', dev: 'बहुत अच्छा' },
    { rom: 'hindi bhasha sundar hai', dev: 'हिंदी भाषा सुंदर है' }
  ],
  nepali: [
    { rom: 'namaste', dev: 'नमस्ते' },
    { rom: 'dhanyabad', dev: 'धन्यबाद' },
    { rom: 'ma timlaai maaya garchu', dev: 'म तिमीलाई माया गर्छु' },
    { rom: 'kasto cha', dev: 'कस्तो छ' },
    { rom: 'mero naam ram ho', dev: 'मेरो नाम राम हो' },
    { rom: 'tapai kahan bata hunuhuncha', dev: 'तपाईं कहाँ बाट हुनुहुन्छ' },
    { rom: 'dherai ramro', dev: 'धेरै राम्रो' },
    { rom: 'nepali bhasha mitho cha', dev: 'नेपाली भाषा मिठो छ' }
  ]
};

/* Keys for tokenizer (longest-first) */
const KEYS = Object.keys({...consonantMap,...vowelMap,...specialMap}).sort((a,b)=>b.length-a.length);

/* --- UI Elements --- */
const inputEl = document.getElementById('romanizedInput');
const outputEl = document.getElementById('devanagariOutput');
const nepaliBtn = document.getElementById('nepaliBtn');
const hindiBtn = document.getElementById('hindiBtn');
const copyBtn = document.getElementById('copyBtn');
const clearBtn = document.getElementById('clearBtn');
const langLabel = document.getElementById('currentLang');

function setLanguage(lang){
  currentLanguage = lang;
  langLabel.textContent = lang === 'nepali' ? 'Nepali' : 'Hindi';
  nepaliBtn.style.background = lang==='nepali' ? '#ff6b35':'#fff';
  nepaliBtn.style.color = lang==='nepali' ? '#fff':'#ff6b35';
  hindiBtn.style.background = lang==='hindi' ? '#ff6b35':'#fff';
  hindiBtn.style.color = lang==='hindi' ? '#fff':'#ff6b35';
  transliterate();
}

function tokenize(str){
  const tokens=[]; let i=0;
  while(i<str.length){
    const ch=str[i];
    if(/\s/.test(ch)){tokens.push(' ');i++;continue;}
    if(/[0-9]/.test(ch)){tokens.push(ch);i++;continue;}
    if(/[\.,\?\!\;\:\-\—\(\)\[\]\"\'\/\\@#%&]/.test(ch)){tokens.push(ch);i++;continue;}
    let matched=null;
    for(let k=0;k<KEYS.length;k++){
      const key=KEYS[k];
      if(i+key.length<=str.length){
        const slice=str.substr(i,key.length);
        if(slice===key){matched=slice;break;}
        if(slice.toLowerCase()===key.toLowerCase()){matched=slice;break;}
      }
    }
    if(matched){tokens.push(matched);i+=matched.length;}
    else{tokens.push(ch);i++;}
  }
  return tokens;
}

function tokensToDevanagari(tokens){
  const OUT=[];
  for(let idx=0;idx<tokens.length;idx++){
    const tk=tokens[idx];
    if(tk===' '){OUT.push(' ');continue;}
    if(/^[\.,\?\!\;\:\-\—\(\)\[\]\"\'\/\\@#%&]$/.test(tk)){OUT.push(tk);continue;}
    if(digitsMap[tk]){OUT.push(digitsMap[tk]);continue;}
    if(specialMap[tk]||specialMap[tk.toLowerCase()]){OUT.push(specialMap[tk]||specialMap[tk.toLowerCase()]);continue;}
    const vl=vowelMap[tk.toLowerCase()];
    if(vl){OUT.push(vl);continue;}
    const cons=consonantMap[tk]||consonantMap[tk.toLowerCase()];
    if(cons){
      const next=tokens[idx+1];
      if(next && vowelMap[next.toLowerCase()]){
        const vn=next.toLowerCase();
        if(vn==='a'){OUT.push(cons);idx++;continue;}
        else{OUT.push(cons+(matraMap[vn]||''));idx++;continue;}
      }
      if(next && (consonantMap[next]||consonantMap[next.toLowerCase()])){OUT.push(cons+'्');continue;}
      OUT.push(cons);
      continue;
    }
    OUT.push(tk);
  }
  return OUT.join('').replace(/्\s/g,' ');
}

function transliterate(){outputEl.value=tokensToDevanagari(tokenize(inputEl.value));}

/* --- Utilities --- */
copyBtn.addEventListener('click',()=>{if(!outputEl.value){alert('Nothing to copy!');return;}navigator.clipboard.writeText(outputEl.value).then(()=>{const orig=copyBtn.textContent;copyBtn.textContent='✅ Copied!';copyBtn.style.background='#16a34a';setTimeout(()=>{copyBtn.textContent=orig;copyBtn.style.background='#10b981';},2000);}).catch(()=>alert('Copy failed.'));});
clearBtn.addEventListener('click',()=>{inputEl.value='';outputEl.value='';});
nepaliBtn.addEventListener('click',()=>setLanguage('nepali'));
hindiBtn.addEventListener('click',()=>setLanguage('hindi'));
inputEl.addEventListener('input',transliterate);
inputEl.addEventListener('keyup',transliterate);
inputEl.addEventListener('paste',()=>setTimeout(transliterate,10));

})();
</script>