백테스팅 적용

frontend/src/utils/analysisChartData.ts

@@ -0,0 +1,53 @@
+import type { OHLCVBar, Timeframe } from '../types';
+import { API_BASE } from './backendApi';
+import { timeframeToCandleType } from './chartCandleType';
+import { fetchUpbitCandlesBeforeCached } from './requestCache';
+import { normalizeEpochSec } from './backtestUiUtils';
+
+/** 백엔드·업비트 history API용 ISO (Z 접미사 없음 — 서버에서 추가) */
+export function toHistoryApiIso(epochSec: number): string {
+  return new Date(epochSec * 1000).toISOString().replace(/\.\d{3}Z$/, '');
+}
+
+/** 백테스팅·실매매 분석용 과거 캔들 로드 */
+export async function loadAnalysisCandles(
+  market: string,
+  timeframe: Timeframe,
+  toTimeSec: number,
+  count: number,
+): Promise<OHLCVBar[]> {
+  const type = timeframeToCandleType(timeframe);
+  const toSec = normalizeEpochSec(toTimeSec);
+  const to = toHistoryApiIso(toSec);
+  const safeCount = Math.max(50, Math.min(count, 500));
+  const params = new URLSearchParams({
+    market,
+    type,
+    to,
+    count: String(safeCount),
+  });
+
+  let data: OHLCVBar[] = [];
+  try {
+    const res = await fetch(`${API_BASE}/candles/history?${params.toString()}`);
+    if (res.ok) {
+      const raw: Array<Record<string, number>> = await res.json();
+      data = raw.map(d => ({
+        time: d.time,
+        open: d.open,
+        high: d.high,
+        low: d.low,
+        close: d.close,
+        volume: d.volume,
+      }));
+    }
+  } catch { /* backend fallback below */ }
+
+  if (data.length === 0) {
+    try {
+      data = await fetchUpbitCandlesBeforeCached(market, timeframe, safeCount, to);
+    } catch { /* ignore */ }
+  }
+
+  return data.sort((a, b) => a.time - b.time);
+}