/* ── 관심종목 탭 순수 헬퍼 (라벨/색/시간) ── */

export const KIND_META = Object.freeze({
  buy:  Object.freeze({ label: '매수', color: '#22c55e', bg: 'rgba(34,197,94,0.12)' }),
  sell: Object.freeze({ label: '매도', color: '#ef4444', bg: 'rgba(239,68,68,0.12)' }),
});

const FALLBACK_KIND = { color: '#94a3b8', bg: 'rgba(148,163,184,0.12)' };

export const kindMeta = (kind) => {
  if (Object.hasOwn(KIND_META, kind)) return KIND_META[kind];
  return { ...FALLBACK_KIND, label: kind ?? '' };
};

export const CONDITION_LABEL = Object.freeze({
  buy_ma20_pullback: 'MA20 눌림 반등',
  buy_breakout: '박스 상단 돌파',
  buy_rsi_bounce: 'RSI 과매도 반등',
  sell_stop_loss: '손절 라인',
  sell_ma_break: '이평선 이탈',
  sell_take_profit: '목표가 도달',
  sell_climax: '과열 소진',
  sell_trailing_stop: '트레일링 스톱',
});

export const conditionLabel = (cond) =>
  Object.hasOwn(CONDITION_LABEL, cond) ? CONDITION_LABEL[cond] : (cond ?? '');

export const normalizeTicker = (str) => String(str ?? '').trim();

export const relativeTime = (iso, now = Date.now()) => {
  if (!iso) return '';
  const then = new Date(iso).getTime();
  if (Number.isNaN(then)) return '';
  const diffMs = now - then;
  if (diffMs < 0) return '방금';
  const sec = Math.floor(diffMs / 1000);
  if (sec < 60) return '방금';
  const min = Math.floor(sec / 60);
  if (min < 60) return `${min}분 전`;
  const hr = Math.floor(min / 60);
  if (hr < 24) return `${hr}시간 전`;
  const day = Math.floor(hr / 24);
  if (day === 1) return '어제';
  if (day < 7) return `${day}일 전`;
  return new Date(iso).toLocaleDateString('ko-KR');
};