'use strict';
(function attachSharedContracts(root,factory){
  const api=factory();
  if(typeof module==='object'&&module.exports)module.exports=api;
  if(root)root.BendSharedContracts=api;
})(typeof globalThis!=='undefined'?globalThis:this,()=>{
  const BOARD_ID_RE=/^B(?:0|[1-9][0-9]*)$/;
  const CONTRACT_ID_RE=/^[A-Za-z0-9:_-]+$/;
  const SPECIAL_MECHANIC_TYPES=Object.freeze(['warp','lock','crossing','internalGate']);
  const SPECIAL_MECHANIC_SET=new Set(SPECIAL_MECHANIC_TYPES);
  const DEFAULT_BUYER='\u65c5\u4eba';

  function cleanContractId(value,maxLength=64){
    const text=String(value||'').trim();
    return text&&text.length<=maxLength&&CONTRACT_ID_RE.test(text)?text:'';
  }

  function cleanPlayerName(value,fallback=DEFAULT_BUYER){
    const name=String(value||'').replace(/[\u0000-\u001f\u007f]/g,'').replace(/\s+/g,' ').trim().slice(0,24);
    return name||fallback;
  }

  function normalizeSpecialMechanics(raw){
    return[...new Set((Array.isArray(raw)?raw:[]).filter(type=>SPECIAL_MECHANIC_SET.has(type)))].sort();
  }

  function normalizePlayerPurchases(raw,{resolveItem=id=>({id}),maxPurchases=10000,maxPaidCost=Number.MAX_SAFE_INTEGER,defaultBuyer=DEFAULT_BUYER}={}){
    const purchases=[],seenIds=new Set(),seenStoreItems=new Set();
    for(const source of Array.isArray(raw)?raw:[]){
      if(purchases.length>=maxPurchases)break;
      const purchaseId=cleanContractId(source?.purchaseId,64),boardId=cleanContractId(source?.boardId,32),item=resolveItem(String(source?.itemId||'')),
        storeKey=`${boardId}:${item?.id||''}`;
      if(!purchaseId||!BOARD_ID_RE.test(boardId)||!item?.id||seenIds.has(purchaseId)||seenStoreItems.has(storeKey))continue;
      const boughtAt=Number(source.boughtAt),paidCost=Number.isSafeInteger(source.paidCost)&&source.paidCost>=0?Math.min(source.paidCost,maxPaidCost):item.cost;
      if(!Number.isSafeInteger(paidCost)||paidCost<0)continue;
      seenIds.add(purchaseId);seenStoreItems.add(storeKey);
      purchases.push({
        purchaseId,
        boardId,
        itemId:item.id,
        buyer:cleanPlayerName(source.buyer,defaultBuyer),
        boughtAt:Number.isFinite(boughtAt)&&boughtAt>0?boughtAt:0,
        paidCost
      });
    }
    return purchases;
  }

  return Object.freeze({
    BOARD_ID_RE,
    SPECIAL_MECHANIC_TYPES,
    cleanContractId,
    cleanPlayerName,
    normalizeSpecialMechanics,
    normalizePlayerPurchases
  });
});