// Extract only explicitly labelled bid validity clauses; delivery/warranty days are unrelated.
export function extractBidValidity(text) {
  const source=String(text || '');
  const pattern=/teklif(?:lerin|in)?\s+geçerlilik\s+süresi[^\n.\d]{0,100}(\d{1,4})(?:\s*\([^)]{0,80}\))?\s*(?:takvim\s*)?gün/giu;
  const evidence=[];
  for(const match of source.toLocaleLowerCase('tr-TR').matchAll(pattern)) {
    const days=Number(match[1]);
    if(days>0) evidence.push({days,quote:source.slice(match.index,match.index+match[0].length),start:match.index,end:match.index+match[0].length});
  }
  const values=[...new Set(evidence.map(e=>e.days))];
  return {status:values.length>1?'conflict':values.length?'found':'not_found',days:values.length===1?values[0]:null,evidence};
}

export function bidValidityForForm(announcement, analyzed) {
  const local=extractBidValidity(announcement);
  const evidence=[...local.evidence,...(Array.isArray(analyzed?.evidence)?analyzed.evidence:[])];
  const values=[...new Set(evidence.map(e=>e.days).filter(d=>Number.isInteger(d)&&d>0))];
  return {status:values.length>1?'conflict':values.length?'found':'not_found',days:values.length===1?values[0]:null,evidence};
}

export function extractBidType(text) {
  const source=String(text || ''),lower=source.toLocaleLowerCase('tr-TR'),evidence=[];
  for(const [type,label] of [['birim','birim\\s+fiyat'],['goturu','(?:anahtar\\s+teslimi?\\s+)?götürü\\s+bedel']]) {
    const pattern=new RegExp(`(?:teklif\\s+türü\\s*[:：-]\\s*${label}|${label}\\s+(?:üzerinden\\s+|şeklinde\\s+)?teklif\\s+(?:verilecektir|vereceklerdir|sunulacaktır|alınacaktır))`,'gu');
    for(const match of lower.matchAll(pattern)) evidence.push({type,quote:source.slice(match.index,match.index+match[0].length),start:match.index,end:match.index+match[0].length});
  }
  return summarizeBidType(evidence);
}
function summarizeBidType(evidence) {
  const types=[...new Set(evidence.map(e=>e.type).filter(t=>['birim','goturu'].includes(t)))];
  return {status:types.length>1?'conflict':types.length?'found':'not_found',type:types.length===1?types[0]:null,evidence};
}
export function bidTypeForForm(announcement,analyzed) {
  return summarizeBidType([...extractBidType(announcement).evidence,...(Array.isArray(analyzed?.evidence)?analyzed.evidence:[])]);
}