import type { Timeframe } from '../types';
import { formatTimeframeKo } from './backtestUiUtils';

/** 빠른 백테스팅 — 전략 DSL에 저장된 시간봉 사용 */
export const BACKTEST_STRATEGY_TIMEFRAME = '__strategy__' as const;

export type BacktestRunTimeframeChoice = Timeframe | typeof BACKTEST_STRATEGY_TIMEFRAME;

export const QUICK_RUN_TIMEFRAME_ITEMS: { value: Timeframe; label: string }[] = [
  { value: '1m',  label: '1분' },
  { value: '3m',  label: '3분' },
  { value: '5m',  label: '5분' },
  { value: '10m', label: '10분' },
  { value: '15m', label: '15분' },
  { value: '30m', label: '30분' },
  { value: '1h',  label: '1시간' },
  { value: '4h',  label: '4시간' },
  { value: '1D',  label: '일봉' },
  { value: '1W',  label: '주봉' },
];

export function isBacktestStrategyTimeframeChoice(
  value: string,
): value is typeof BACKTEST_STRATEGY_TIMEFRAME {
  return value === BACKTEST_STRATEGY_TIMEFRAME;
}

export function parseBacktestRunTimeframeChoice(value: string): BacktestRunTimeframeChoice {
  if (isBacktestStrategyTimeframeChoice(value)) return BACKTEST_STRATEGY_TIMEFRAME;
  return value as Timeframe;
}

/** UI 선택 → 실제 실행 시간봉 */
export function resolveBacktestExecTimeframe(
  choice: BacktestRunTimeframeChoice,
  strategyTimeframe: Timeframe,
): Timeframe {
  if (choice === BACKTEST_STRATEGY_TIMEFRAME) return strategyTimeframe;
  return choice;
}

export function buildQuickRunTimeframeSelectOptions(strategyTimeframe?: Timeframe) {
  const stratLabel = strategyTimeframe
    ? `전략 시간봉 (${formatTimeframeKo(strategyTimeframe)})`
    : '전략 시간봉';
  return [
    { value: BACKTEST_STRATEGY_TIMEFRAME, label: stratLabel },
    ...QUICK_RUN_TIMEFRAME_ITEMS,
  ];
}