import type { TradeHistoryRow } from './backtestEquity';

export type TradeHistorySortKey = 'time' | 'side' | 'price' | 'pnlPct';
export type TradeHistorySortDir = 'asc' | 'desc';

export function sortTradeHistoryRows(
  rows: readonly TradeHistoryRow[],
  key: TradeHistorySortKey,
  dir: TradeHistorySortDir,
): TradeHistoryRow[] {
  const mul = dir === 'asc' ? 1 : -1;
  return [...rows].sort((a, b) => {
    let cmp = 0;
    switch (key) {
      case 'time':
        cmp = a.time - b.time;
        break;
      case 'side':
        cmp = a.side.localeCompare(b.side);
        break;
      case 'price':
        cmp = a.price - b.price;
        break;
      case 'pnlPct':
        cmp = compareNullableNumber(a.pnlPct, b.pnlPct);
        break;
      default:
        cmp = 0;
    }
    if (cmp !== 0) return cmp * mul;
    return a.id - b.id;
  });
}

/** 손익 없음(매수)은 항상 목록 끝 */
function compareNullableNumber(a: number | undefined, b: number | undefined): number {
  if (a == null && b == null) return 0;
  if (a == null) return 1;
  if (b == null) return -1;
  return a - b;
}