import { useCallback, useMemo, useRef, useState, type RefObject } from 'react';
import type { IndicatorConfig } from '../types';
import type { ChartManager } from '../utils/ChartManager';
import type { ChartOverlayToggleKey } from '../utils/chartOverlayVisibility';
import {
  applyPaperOverlayVisibility,
  DEFAULT_PAPER_OVERLAY_VISIBILITY,
  listPaperOverlayToggleItems,
  paperOverlayVisibilityToChart,
  type PaperOverlayToggleKey,
  type PaperOverlayVisibility,
} from '../utils/paperChartOverlayVisibility';

/** 알림·백테스트 등 — 캔들 오버레이 표시/숨김 (세션만, DB 미저장) */
export function useSessionCandleOverlayControls(
  managerRef: RefObject<ChartManager | null>,
  baseIndicators: IndicatorConfig[],
) {
  const [overlayVisibility, setOverlayVisibility] = useState<PaperOverlayVisibility>(
    () => ({ ...DEFAULT_PAPER_OVERLAY_VISIBILITY }),
  );
  const overlayVisibilityRef = useRef(overlayVisibility);
  overlayVisibilityRef.current = overlayVisibility;

  const indicators = useMemo(
    () => applyPaperOverlayVisibility(baseIndicators, overlayVisibility),
    [baseIndicators, overlayVisibility],
  );

  const candleOverlayToggles = useMemo(
    () => listPaperOverlayToggleItems(baseIndicators, overlayVisibility),
    [baseIndicators, overlayVisibility],
  );

  const syncToManager = useCallback((mgr: ChartManager) => {
    mgr.setChartOverlayVisibility(paperOverlayVisibilityToChart(overlayVisibilityRef.current));
  }, []);

  const handleToggleCandleOverlay = useCallback((key: ChartOverlayToggleKey) => {
    const pKey = key as PaperOverlayToggleKey;
    if (!(pKey in DEFAULT_PAPER_OVERLAY_VISIBILITY)) return;
    setOverlayVisibility(prev => {
      const nextVisible = !prev[pKey];
      managerRef.current?.setChartOverlayGroupVisible(key, nextVisible);
      return { ...prev, [pKey]: nextVisible };
    });
  }, [managerRef]);

  return {
    indicators,
    candleOverlayToggles,
    handleToggleCandleOverlay,
    syncToManager,
    overlayVisibility,
  };
}