import fs from 'node:fs';
const CLIENT_ID='1idZRzFTMDBLO5z-dbd';
const LEDGERS=['web/ledger.json','web/ledger-backfill.json'];

// High-frequency / important brands: regex on the RAW upper description -> canonical domain.
// These are resolved directly (logo via Brandfetch CDN by domain) with high precision.
const ALIAS=[
  [/UBER\s*EATS|UBR.*EATS|PS UBER EATS/, 'Uber Eats','ubereats.com'],
  [/\bUBER\b|\bUBR\b/, 'Uber','uber.com'],
  [/RAPPI/, 'Rappi','rappi.com'],
  [/MERCADO ?PAGO|MERPAGO|\bMP\b/, 'Mercado Pago','mercadopago.cl'],
  [/APPLE/, 'Apple','apple.com'],
  [/NETFLIX/, 'Netflix','netflix.com'],
  [/SPOTIFY/, 'Spotify','spotify.com'],
  [/\bTEMU\b/, 'Temu','temu.com'],
  [/ALIEXPRESS/, 'AliExpress','aliexpress.com'],
  [/\bAMAZON\b/, 'Amazon','amazon.com'],
  [/\bSHEIN\b/, 'Shein','shein.com'],
  [/CABIFY/, 'Cabify','cabify.com'],
  [/\bDIDI\b/, 'DiDi','didiglobal.com'],
  [/PAYPAL/, 'PayPal','paypal.com'],
  [/PAYSEND/, 'Paysend','paysend.com'],
  [/\bMC ?DONALD/, "McDonald's",'mcdonalds.com'],
  [/\bKFC\b/, 'KFC','kfc.com'],
  [/STA ISABEL|SANTA ISABEL/, 'Santa Isabel','santaisabel.cl'],
  [/\bJUMBO\b/, 'Jumbo','jumbo.cl'],
  [/HIP ?LIDER|\bLIDER\b/, 'Lider','lider.cl'],
  [/TOTTUS/, 'Tottus','tottus.cl'],
  [/UNIMARC/, 'Unimarc','unimarc.cl'],
  [/\bCOPEC\b/, 'Copec','copec.cl'],
  [/\bSHELL\b/, 'Shell','shell.com'],
  [/FALABELLA/, 'Falabella','falabella.com'],
  [/RIPLEY/, 'Ripley','ripley.cl'],
  [/SODIMAC/, 'Sodimac','sodimac.cl'],
  [/\bPARIS\b/, 'Paris','paris.cl'],
  [/\bENTEL\b/, 'Entel','entel.cl'],
  [/\bWOM\b/, 'WOM','wom.cl'],
  [/MOVISTAR/, 'Movistar','movistar.cl'],
  [/\bCLARO\b/, 'Claro','claro.cl'],
  [/TURBUS|TUR BUS/, 'Turbus','turbus.cl'],
  [/CRUZ VERDE/, 'Cruz Verde','cruzverde.cl'],
  [/SALCOBRAND/, 'Salcobrand','salcobrand.cl'],
  [/FARMACIA.*AHUMADA|AHUMADA/, 'Farmacias Ahumada','farmaciasahumada.cl'],
  [/INTEGRAMEDICA/, 'IntegraMédica','integramedica.cl'],
  [/\bGOOGLE\b/, 'Google','google.com'],
  [/MICROSOFT/, 'Microsoft','microsoft.com'],
  [/\bOPENAI\b/, 'OpenAI','openai.com'],
  [/ANTHROPIC/, 'Anthropic','anthropic.com'],
  [/HETZNER/, 'Hetzner','hetzner.com'],
  [/SPOTMINDERS/, 'Spotminders','spotminders.com'],
  [/ADIDAS/, 'adidas','adidas.com'],
  [/NEW BALANCE/, 'New Balance','newbalance.com'],
  [/ENEL/, 'Enel','enel.cl'],
  [/SERVIPAG/, 'Servipag','servipag.com'],
  [/SENCILLITO/, 'Sencillito','sencillito.com'],
];

function aliasOf(descRaw){
  const s=(descRaw||'').toUpperCase();
  for(const [re,name,domain] of ALIAS) if(re.test(s)) return {name,domain,via:'alias'};
  return null;
}
function brandTerm(descRaw){
  let s=(descRaw||'').toUpperCase();
  if(/INTERES|IMPUEST|COMISION|COM\.|MANTENCION|PASAJE QR|RENDIMIENTO|COBRANZA|\bMORA\b|DL ?3475|CARGO INTERES|GASTO DE|TRASPASO|\bABONO\b|\bGIRO\b|RETIRO|TEF |TRANSF|SEGURO|DIVISAS|PREPAGO EN CUOTAS|PAGO (AUTOMATICO|APP|TARJETA)|O\.GERENCIA/.test(s)) return null;
  s=s.replace(/^(PS|PAGO|PAGO:|PREPAGO|COMPRA)\s+/i,'');
  s=s.replace(/^(PAYU|MP|CV ?\d*|DL|PAYSCAN|MERPAGO|MERCADOPAGO|SUMUP|TUU|MACH|WEBPAY|ONECLICK|KUSHKI|SERVIPAG\.COM)\s*[\*—\-·:]*\s*/i,'');
  s=s.replace(/\b(COMPRA POR INTERNET|COMPRA NACIONAL|COMPRA INTERNAC\w*|COMPRA( \d+)? CUOTAS( PRECIO CONTADO)?|PRECIO CONTADO|RECARGA ONLINE|WEB ?\d*|ONLINE)\b/gi,' ');
  s=s.replace(/·.*/,' ').replace(/\.(COM|CO|CL)\b.*/i,' ').replace(/HELP\..*/i,' ');
  s=s.replace(/\b(PENDING|PEND|SANTIAGO|CL|LAS CONDES|PROVIDENCIA|VITACURA|CURICO)\b/g,' ');
  s=s.replace(/[\*—·|\/]/g,' ').replace(/\s{2,}/g,' ').trim();
  if(s.length<3) return null;
  if(/^(COMPRA|PAGO|TARJETA|NACIONAL|INTERNET|VENTA|DIGITAL|VIRTUAL|PUN|WEB)$/.test(s)) return null;
  return s.slice(0,40);
}

const aliasHits=new Map(); const terms=new Map();
let totalTx=0, aliasTx=0;
for(const lf of LEDGERS){ if(!fs.existsSync(lf))continue;
  const d=JSON.parse(fs.readFileSync(lf));
  for(const s of d.statements) for(const t of s.transactions){
    if(!['expense','fee'].includes(t.flow_type))continue;
    totalTx++;
    const a=aliasOf(t.description);
    if(a){ aliasHits.set(a.domain,a); aliasTx++; continue; }
    const term=brandTerm(t.description); if(!term)continue;
    terms.set(term,(terms.get(term)||0)+1);
  }
}

const sleep=ms=>new Promise(r=>setTimeout(r,ms));
async function search(q){ try{ const r=await fetch('https://api.brandfetch.io/v2/search/'+encodeURIComponent(q)+'?c='+CLIENT_ID); if(!r.ok)return null; const j=await r.json(); return Array.isArray(j)?j:null;}catch{return null;} }
function norm(x){return (x||'').toUpperCase().replace(/[^A-Z0-9]/g,'');}
function pick(term,results){
  if(!results)return null;
  const words=term.toUpperCase().split(/\s+/).filter(w=>w.length>2);
  for(const b of results){
    if(!b.verified||!b.icon||b.qualityScore<0.6)continue;
    const N=norm(b.name);
    const firstWordMatch = words.length && N.includes(norm(words[0])) && norm(words[0]).length>2;
    const whole = norm(term);
    if(firstWordMatch || N.includes(whole) || whole.includes(N)) return {name:b.name,domain:b.domain,via:'search'};
  }
  return null;
}

const out={};
for(const a of aliasHits.values()) out[a.name.toUpperCase()]={name:a.name,domain:a.domain,via:'alias'};
let shit=0,smiss=0; const missed=[];
for(const [term,cnt] of [...terms.entries()].sort((a,b)=>b[1]-a[1])){
  const m=pick(term, await search(term));
  if(m){ out[term]=m; shit++; } else { smiss++; if(missed.length<20) missed.push(term+' ('+cnt+')'); }
  await sleep(110);
}
// build coverage: how many TRANSACTIONS get a logo
function logoForTx(desc){
  const a=aliasOf(desc); if(a&&out[a.name.toUpperCase()])return true;
  const term=brandTerm(desc); if(term&&out[term])return true; return false;
}
let covered=0;
for(const lf of LEDGERS){ if(!fs.existsSync(lf))continue; const d=JSON.parse(fs.readFileSync(lf));
  for(const s of d.statements) for(const t of s.transactions){ if(!['expense','fee'].includes(t.flow_type))continue; if(logoForTx(t.description))covered++; } }
fs.writeFileSync('web/merchant-logos.json',JSON.stringify(out,null,1));
console.log('alias brands:',aliasHits.size,'| search resolved:',shit,'| search missed:',smiss);
console.log('TOTAL logo entries:',Object.keys(out).length);
console.log('TXN COVERAGE: '+covered+' / '+totalTx+' expense+fee txns ('+Math.round(covered/totalTx*100)+'%)');
console.log('\n--- still missed (top) ---'); missed.forEach(m=>console.log('  '+m));