/**
 * 선박 우클릭 컨텍스트 메뉴
 * - 단일 선박 우클릭: 해당 선박 메뉴
 * - Ctrl+Drag 선택 후 우클릭: 선택된 선박 전체 메뉴
 */
import { useState, useEffect, useRef, useCallback } from 'react';
import useShipStore from '../../stores/shipStore';
import { useTrackQueryStore } from '../../tracking/stores/trackQueryStore';
import useTrackingModeStore, { RADIUS_OPTIONS, isPatrolShip } from '../../stores/trackingModeStore';
import {
  fetchVesselTracksV2,
  convertToProcessedTracks,
  buildVesselListForQuery,
  deduplicateVessels,
} from '../../tracking/services/trackQueryApi';
import './ShipContextMenu.scss';

/** KST 기준 로컬 ISO 문자열 생성 (toISOString()은 UTC이므로 사용하지 않음) */
function toKstISOString(date) {
  const pad = (n) => String(n).padStart(2, '0');
  return `${date.getFullYear()}-${pad(date.getMonth() + 1)}-${pad(date.getDate())}T${pad(date.getHours())}:${pad(date.getMinutes())}:${pad(date.getSeconds())}`;
}

const MENU_ITEMS = [
  { key: 'track', label: '항적조회' },
  // TODO: 임시 배포용 - 미구현 기능 숨김
  // { key: 'analysis', label: '항적분석' },
  // { key: 'detail', label: '상세정보' },
  { key: 'radius', label: '반경설정', hasSubmenu: true },
];

export default function ShipContextMenu() {
  const contextMenu = useShipStore((s) => s.contextMenu);
  const closeContextMenu = useShipStore((s) => s.closeContextMenu);
  const setRadius = useTrackingModeStore((s) => s.setRadius);
  const selectTrackedShip = useTrackingModeStore((s) => s.selectTrackedShip);
  const currentRadius = useTrackingModeStore((s) => s.radiusNM);
  const menuRef = useRef(null);
  const [hoveredItem, setHoveredItem] = useState(null);

  // 외부 클릭 시 닫기
  useEffect(() => {
    if (!contextMenu) return;

    const handleClick = (e) => {
      if (menuRef.current && !menuRef.current.contains(e.target)) {
        closeContextMenu();
      }
    };

    document.addEventListener('mousedown', handleClick);
    return () => document.removeEventListener('mousedown', handleClick);
  }, [contextMenu, closeContextMenu]);

  // 반경 선택 핸들러
  const handleRadiusSelect = useCallback((radius) => {
    if (!contextMenu) return;
    const { ships } = contextMenu;

    // 단일 경비함정인 경우 해당 함정을 추적 대상으로 설정
    if (ships.length === 1) {
      const ship = ships[0];
      setRadius(radius);
      selectTrackedShip(ship.featureId, ship);
    }
    closeContextMenu();
  }, [contextMenu, setRadius, selectTrackedShip, closeContextMenu]);

  // 메뉴 항목 클릭
  const handleAction = useCallback(async (key) => {
    if (!contextMenu) return;
    const { ships } = contextMenu;

    // 반경설정은 서브메뉴에서 처리
    if (key === 'radius') return;

    closeContextMenu();

    switch (key) {
      case 'track': {
        const store = useTrackQueryStore.getState();
        store.reset();

        const endTime = new Date();
        const startTime = new Date(endTime.getTime() - 3 * 24 * 60 * 60 * 1000); // 3일

        const { isIntegrate, features } = useShipStore.getState();

        const allVessels = [];
        const errors = [];
        ships.forEach(ship => {
          const result = buildVesselListForQuery(ship, 'rightClick', isIntegrate, features);
          if (result.canQuery) allVessels.push(...result.vessels);
          else if (result.errorMessage) errors.push(result.errorMessage);
        });

        // (sigSrcCd, targetId) 중복 제거
        const uniqueVessels = deduplicateVessels(allVessels);

        if (uniqueVessels.length === 0) {
          store.setError(errors[0] || '조회 가능한 선박이 없습니다.');
          return;
        }

        store.setModalMode(false, null);
        store.setLoading(true);
        try {
          const rawTracks = await fetchVesselTracksV2({
            startTime: toKstISOString(startTime),
            endTime: toKstISOString(endTime),
            vessels: uniqueVessels,
            isIntegration: isIntegrate ? '1' : '0',
          });
          const processed = convertToProcessedTracks(rawTracks);
          if (processed.length === 0) {
            store.setError('항적 데이터가 없습니다.');
          } else {
            store.setTracks(processed, startTime.getTime());
          }
        } catch (e) {
          console.error('[ShipContextMenu] 항적 조회 실패:', e);
          store.setError('항적 조회 실패');
        }
        store.setLoading(false);
        break;
      }
      case 'analysis': {
        // 항적분석: 동일한 조회 후 showPlayback 활성화
        const store = useTrackQueryStore.getState();
        store.reset();

        const endTime = new Date();
        const startTime = new Date(endTime.getTime() - 3 * 24 * 60 * 60 * 1000); // 3일

        const { isIntegrate, features } = useShipStore.getState();

        const allVessels = [];
        ships.forEach(ship => {
          const result = buildVesselListForQuery(ship, 'rightClick', isIntegrate, features);
          if (result.canQuery) allVessels.push(...result.vessels);
        });

        // (sigSrcCd, targetId) 중복 제거
        const uniqueVessels = deduplicateVessels(allVessels);

        if (uniqueVessels.length === 0) return;

        store.setModalMode(false, null);
        store.setLoading(true);
        try {
          const rawTracks = await fetchVesselTracksV2({
            startTime: toKstISOString(startTime),
            endTime: toKstISOString(endTime),
            vessels: uniqueVessels,
            isIntegration: isIntegrate ? '1' : '0',
          });
          const processed = convertToProcessedTracks(rawTracks);
          if (processed.length > 0) {
            store.setTracks(processed, startTime.getTime());
            // showPlayback 활성화 (재생 컨트롤 표시)
            useTrackQueryStore.setState({ showPlayback: true });
          }
        } catch (e) {
          console.error('[ShipContextMenu] 항적분석 조회 실패:', e);
        }
        store.setLoading(false);
        break;
      }
      case 'detail':
        if (ships.length === 1) {
          useShipStore.getState().openDetailModal(ships[0]);
        }
        break;
      default:
        console.log(`[ContextMenu] action=${key}, ships=`, ships.map((s) => ({
          featureId: s.featureId,
          shipName: s.shipName,
          targetId: s.targetId,
        })));
    }
  }, [contextMenu, closeContextMenu]);

  if (!contextMenu) return null;

  const { x, y, ships } = contextMenu;

  // 단일 경비함정인지 확인 (반경설정 메뉴 표시 조건)
  const isSinglePatrolShip = ships.length === 1 && isPatrolShip(ships[0].originalTargetId);

  // 표시할 메뉴 항목 필터링
  const visibleMenuItems = MENU_ITEMS.filter((item) => {
    if (item.key === 'radius') return isSinglePatrolShip;
    return true;
  });

  // 화면 밖 넘침 방지
  const menuWidth = 160;
  const menuHeight = visibleMenuItems.length * 36 + 40; // 항목 + 헤더
  const adjustedX = x + menuWidth > window.innerWidth ? x - menuWidth : x;
  const adjustedY = y + menuHeight > window.innerHeight ? y - menuHeight : y;

  // 서브메뉴 위치 (오른쪽 또는 왼쪽)
  const submenuOnLeft = adjustedX + menuWidth + 120 > window.innerWidth;

  const title = ships.length === 1
    ? (ships[0].shipName || ships[0].featureId)
    : `${ships.length}척 선택`;

  return (
    <div
      ref={menuRef}
      className="ship-context-menu"
      style={{ left: adjustedX, top: adjustedY }}
    >
      <div className="ship-context-menu__header">{title}</div>
      {visibleMenuItems.map((item, index) => (
        <div
          key={item.key}
          className={`ship-context-menu__item ${item.hasSubmenu ? 'has-submenu' : ''}`}
          onClick={() => handleAction(item.key)}
          onMouseEnter={() => setHoveredItem(item.key)}
          onMouseLeave={() => setHoveredItem(null)}
        >
          {item.label}
          {item.hasSubmenu && <span className="submenu-arrow">▶</span>}

          {/* 반경설정 서브메뉴 */}
          {item.key === 'radius' && hoveredItem === 'radius' && (
            <div
              className={`ship-context-menu__submenu ${submenuOnLeft ? 'left' : 'right'}`}
              style={{ top: 0 }}
            >
              {RADIUS_OPTIONS.map((radius) => (
                <div
                  key={radius}
                  className={`ship-context-menu__item ${currentRadius === radius ? 'active' : ''}`}
                  onClick={(e) => {
                    e.stopPropagation();
                    handleRadiusSelect(radius);
                  }}
                >
                  {radius} NM
                </div>
              ))}
            </div>
          )}
        </div>
      ))}
    </div>
  );
}