function parseTradeTime(createdAt) {
  if (!createdAt) return Math.floor(Date.now() / 1000);
  const ms = Date.parse(createdAt);
  return Number.isFinite(ms) ? Math.floor(ms / 1000) : Math.floor(Date.now() / 1000);
}

function mapDenaTradeToShahoo(trade) {
  return {
    id: trade.id,
    unitPrice: parseFloat(trade.price) || 0,
    amount: parseFloat(trade.amount) || 0,
    total: parseFloat(trade.total) || 0,
    time: parseTradeTime(trade.created_at),
    side: trade.taker_type || trade.side,
    market: trade.market,
  };
}

function mapDenaTradesToShahoo(trades) {
  return (trades || []).map(mapDenaTradeToShahoo);
}

module.exports = { mapDenaTradeToShahoo, mapDenaTradesToShahoo };