"use client";

import React, { useState, useEffect } from "react";
import dynamic from "next/dynamic";
import { Button } from "@/components/ui/button";
import { RefreshCw } from "lucide-react";
import { getApiUrl } from "@/lib/utils/apiUrl";
import "leaflet/dist/leaflet.css";

// Leaflet 아이콘 경로 설정 (엑박 방지)
if (typeof window !== "undefined") {
  const L = require("leaflet");
  delete (L.Icon.Default.prototype as any)._getIconUrl;
  L.Icon.Default.mergeOptions({
    iconRetinaUrl: "https://unpkg.com/leaflet@1.9.4/dist/images/marker-icon-2x.png",
    iconUrl: "https://unpkg.com/leaflet@1.9.4/dist/images/marker-icon.png",
    shadowUrl: "https://unpkg.com/leaflet@1.9.4/dist/images/marker-shadow.png",
  });
}

// Leaflet 동적 import (SSR 방지)
const MapContainer = dynamic(() => import("react-leaflet").then((mod) => mod.MapContainer), { ssr: false });
const TileLayer = dynamic(() => import("react-leaflet").then((mod) => mod.TileLayer), { ssr: false });
const Marker = dynamic(() => import("react-leaflet").then((mod) => mod.Marker), { ssr: false });
const Popup = dynamic(() => import("react-leaflet").then((mod) => mod.Popup), { ssr: false });
const Circle = dynamic(() => import("react-leaflet").then((mod) => mod.Circle), { ssr: false });
const Polyline = dynamic(() => import("react-leaflet").then((mod) => mod.Polyline), { ssr: false });

// 브이월드 API 키
const VWORLD_API_KEY = "97AD30D5-FDC4-3481-99C3-158E36422033";

interface Vehicle {
  id: string;
  name: string;
  driver: string;
  lat: number;
  lng: number;
  status: "active" | "inactive" | "maintenance" | "warning" | "off";
  speed: number;
  destination: string;
  userId?: string; // 이동경로 조회용
  tripId?: string; // 현재 운행 ID
}

// 이동경로 좌표
interface RoutePoint {
  lat: number;
  lng: number;
  recordedAt: string;
  speed?: number;
}

interface VehicleMapOnlyWidgetProps {
  element?: any; // 대시보드 요소 (dataSource, chartConfig 포함)
  refreshInterval?: number;
}

export default function VehicleMapOnlyWidget({ element, refreshInterval = 30000 }: VehicleMapOnlyWidgetProps) {
  const [vehicles, setVehicles] = useState<Vehicle[]>([]);
  const [isLoading, setIsLoading] = useState(false);
  const [lastUpdate, setLastUpdate] = useState<Date>(new Date());
  
  // 이동경로 상태
  const [selectedVehicle, setSelectedVehicle] = useState<Vehicle | null>(null);
  const [routePoints, setRoutePoints] = useState<RoutePoint[]>([]);
  const [isRouteLoading, setIsRouteLoading] = useState(false);

  const loadVehicles = async () => {
    setIsLoading(true);

    // 설정된 쿼리가 없으면 로딩 중단
    if (!element?.dataSource?.query) {
      setIsLoading(false);
      setVehicles([]);
      return;
    }

    // 설정된 컬럼 매핑 확인
    if (!element?.chartConfig?.latitudeColumn || !element?.chartConfig?.longitudeColumn) {
      setIsLoading(false);
      setVehicles([]);
      return;
    }

    try {
      const response = await fetch(getApiUrl("/api/dashboards/execute-query"), {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
          Authorization: `Bearer ${typeof window !== "undefined" ? localStorage.getItem("authToken") || "" : ""}`,
        },
        body: JSON.stringify({
          query: element.dataSource.query,
        }),
      });

      if (response.ok) {
        const result = await response.json();
        if (result.success && result.data.rows.length > 0) {
          // 설정된 컬럼 매핑 가져오기
          const latCol = element.chartConfig.latitudeColumn;
          const lngCol = element.chartConfig.longitudeColumn;
          const labelCol = element.chartConfig.labelColumn || "name";
          const statusCol = element.chartConfig.statusColumn || "status";

          // DB 데이터를 Vehicle 형식으로 변환
          console.log("🗺️ [VehicleMapOnlyWidget] 원본 데이터:", result.data.rows);
          console.log("🗺️ [VehicleMapOnlyWidget] 컬럼 매핑:", { latCol, lngCol, labelCol, statusCol });
          
          const vehiclesFromDB: Vehicle[] = result.data.rows
            .map((row: any, index: number) => {
              const lat = parseFloat(row[latCol]);
              const lng = parseFloat(row[lngCol]);
              
              console.log(`🗺️ [VehicleMapOnlyWidget] 차량 ${index + 1}:`, {
                id: row.id || row.vehicle_number,
                latRaw: row[latCol],
                lngRaw: row[lngCol],
                latParsed: lat,
                lngParsed: lng,
                status: row[statusCol],
              });
              
              return {
                id: row.id || row.vehicle_number || `V${index + 1}`,
                name: row[labelCol] || `차량 ${index + 1}`,
                driver: row.driver_name || row.driver || "미배정",
                lat,
                lng,
                status:
                  row[statusCol] === "warning"
                    ? "warning"
                    : row[statusCol] === "active"
                      ? "active"
                      : row[statusCol] === "maintenance"
                        ? "maintenance"
                        : "inactive",
                speed: parseFloat(row.speed) || 0,
                destination: row.destination || "대기 중",
                userId: row.user_id || row.userId || undefined,
                tripId: row.trip_id || row.tripId || undefined,
              };
            })
            // 유효한 위도/경도가 있는 차량만 필터링
            .filter((v: Vehicle) => !isNaN(v.lat) && !isNaN(v.lng) && v.lat !== 0 && v.lng !== 0);

          console.log("🗺️ [VehicleMapOnlyWidget] 유효한 차량 수:", vehiclesFromDB.length);
          setVehicles(vehiclesFromDB);
          setLastUpdate(new Date());
          setIsLoading(false);
          return;
        }
      }
    } catch (error) {
      console.error("차량 데이터 로드 실패:", error);
    }

    setIsLoading(false);
  };

  // 이동경로 로드 함수
  const loadRoute = async (vehicle: Vehicle) => {
    if (!vehicle.userId && !vehicle.tripId) {
      console.log("🛣️ 이동경로 조회 불가: userId 또는 tripId 없음");
      return;
    }

    setIsRouteLoading(true);
    setSelectedVehicle(vehicle);

    try {
      // 오늘 날짜 기준으로 최근 이동경로 조회
      const today = new Date();
      const startOfDay = new Date(today.getFullYear(), today.getMonth(), today.getDate()).toISOString();
      
      // trip_id가 있으면 해당 운행만, 없으면 user_id로 오늘 전체 조회
      let query = "";
      if (vehicle.tripId) {
        query = `SELECT latitude, longitude, speed, recorded_at 
                 FROM vehicle_location_history 
                 WHERE trip_id = '${vehicle.tripId}' 
                 ORDER BY recorded_at ASC`;
      } else if (vehicle.userId) {
        query = `SELECT latitude, longitude, speed, recorded_at 
                 FROM vehicle_location_history 
                 WHERE user_id = '${vehicle.userId}' 
                 AND recorded_at >= '${startOfDay}'
                 ORDER BY recorded_at ASC`;
      }

      console.log("🛣️ 이동경로 쿼리:", query);

      const response = await fetch(getApiUrl("/api/dashboards/execute-query"), {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
          Authorization: `Bearer ${typeof window !== "undefined" ? localStorage.getItem("authToken") || "" : ""}`,
        },
        body: JSON.stringify({ query }),
      });

      if (response.ok) {
        const result = await response.json();
        if (result.success && result.data.rows.length > 0) {
          const points: RoutePoint[] = result.data.rows.map((row: any) => ({
            lat: parseFloat(row.latitude),
            lng: parseFloat(row.longitude),
            recordedAt: row.recorded_at,
            speed: row.speed ? parseFloat(row.speed) : undefined,
          }));
          
          console.log(`🛣️ 이동경로 ${points.length}개 포인트 로드 완료`);
          setRoutePoints(points);
        } else {
          console.log("🛣️ 이동경로 데이터 없음");
          setRoutePoints([]);
        }
      }
    } catch (error) {
      console.error("이동경로 로드 실패:", error);
      setRoutePoints([]);
    }

    setIsRouteLoading(false);
  };

  // 이동경로 숨기기
  const clearRoute = () => {
    setSelectedVehicle(null);
    setRoutePoints([]);
  };

  // useEffect는 항상 같은 순서로 호출되어야 함 (early return 전에 배치)
  useEffect(() => {
    loadVehicles();
    const interval = setInterval(loadVehicles, refreshInterval);
    return () => clearInterval(interval);
  }, [
    element?.dataSource?.query,
    element?.chartConfig?.latitudeColumn,
    element?.chartConfig?.longitudeColumn,
    refreshInterval,
  ]);

  // 쿼리 없으면 빈 지도만 표시 (안내 메시지 제거)

  const getStatusColor = (status: Vehicle["status"]) => {
    switch (status) {
      case "active":
        return "#22c55e"; // 운행 중 - 초록
      case "inactive":
        return "#eab308"; // 대기 - 노랑
      case "maintenance":
        return "#f97316"; // 정비 - 주황
      case "warning":
        return "#ef4444"; // 고장 - 빨강
      default:
        return "#6b7280"; // 기타 - 회색
    }
  };

  const getStatusText = (status: Vehicle["status"]) => {
    switch (status) {
      case "active":
        return "운행 중";
      case "inactive":
        return "대기";
      case "maintenance":
        return "정비";
      case "warning":
        return "고장";
      default:
        return "알 수 없음";
    }
  };

  return (
    <div className="h-full w-full bg-gradient-to-br from-background to-primary/10 p-4">
      {/* 헤더 */}
      <div className="mb-3 flex items-center justify-between">
        <div>
          <h3 className="text-lg font-bold text-foreground">🗺️ 차량 위치 지도</h3>
          <p className="text-xs text-muted-foreground">마지막 업데이트: {lastUpdate.toLocaleTimeString("ko-KR")}</p>
        </div>
        <Button variant="outline" size="sm" onClick={loadVehicles} disabled={isLoading} className="h-8 w-8 p-0">
          <RefreshCw className={`h-4 w-4 ${isLoading ? "animate-spin" : ""}`} />
        </Button>
      </div>

      {/* 지도 영역 - 브이월드 타일맵 */}
      <div className="h-[calc(100%-60px)]">
        <div className="relative z-0 h-full overflow-hidden rounded-lg border-2 border-border bg-background">
          <MapContainer
            key={`vehicle-map-${element.id}`}
            center={[36.5, 127.5]}
            zoom={7}
            style={{ height: "100%", width: "100%", zIndex: 0 }}
            zoomControl={true}
            preferCanvas={true}
            className="z-0"
          >
            {/* 브이월드 타일맵 (HTTPS, 캐싱 적용) */}
            <TileLayer
              url={`https://api.vworld.kr/req/wmts/1.0.0/${VWORLD_API_KEY}/Base/{z}/{y}/{x}.png`}
              attribution='&copy; <a href="https://www.vworld.kr">VWorld (국토교통부)</a>'
              maxZoom={19}
              minZoom={7}
              updateWhenIdle={true}
              updateWhenZooming={false}
              keepBuffer={2}
            />

            {/* 이동경로 Polyline */}
            {routePoints.length > 1 && (
              <Polyline
                positions={routePoints.map((p) => [p.lat, p.lng] as [number, number])}
                pathOptions={{
                  color: "#3b82f6",
                  weight: 4,
                  opacity: 0.8,
                  dashArray: "10, 5",
                }}
              />
            )}

            {/* 차량 마커 */}
            {vehicles.map((vehicle) => (
              <React.Fragment key={vehicle.id}>
                <Circle
                  center={[vehicle.lat, vehicle.lng]}
                  radius={150}
                  pathOptions={{
                    color: getStatusColor(vehicle.status),
                    fillColor: getStatusColor(vehicle.status),
                    fillOpacity: 0.3,
                  }}
                />
                <Marker position={[vehicle.lat, vehicle.lng]}>
                  <Popup>
                    <div className="text-xs">
                      <div className="mb-1 text-sm font-bold">{vehicle.name}</div>
                      <div>
                        <strong>기사:</strong> {vehicle.driver}
                      </div>
                      <div>
                        <strong>상태:</strong> {getStatusText(vehicle.status)}
                      </div>
                      <div>
                        <strong>속도:</strong> {vehicle.speed} km/h
                      </div>
                      <div>
                        <strong>목적지:</strong> {vehicle.destination}
                      </div>
                      {/* 이동경로 버튼 */}
                      {(vehicle.userId || vehicle.tripId) && (
                        <div className="mt-2 border-t pt-2">
                          <button
                            onClick={() => loadRoute(vehicle)}
                            disabled={isRouteLoading}
                            className="w-full rounded bg-blue-500 px-2 py-1 text-xs text-white hover:bg-blue-600 disabled:opacity-50"
                          >
                            {isRouteLoading && selectedVehicle?.id === vehicle.id
                              ? "로딩 중..."
                              : "🛣️ 이동경로 보기"}
                          </button>
                        </div>
                      )}
                    </div>
                  </Popup>
                </Marker>
              </React.Fragment>
            ))}
          </MapContainer>

          {/* 지도 정보 */}
          <div className="absolute top-2 right-2 z-[1000] rounded-lg bg-background/90 p-2 shadow-lg backdrop-blur-sm">
            <div className="text-xs text-foreground">
              <div className="mb-1 font-semibold">🗺️ 브이월드 (VWorld)</div>
              <div className="text-xs">국토교통부 공식 지도</div>
            </div>
          </div>

          {/* 차량 수 표시 또는 설정 안내 */}
          <div className="absolute bottom-2 left-2 z-[1000] rounded-lg bg-background/90 p-2 shadow-lg backdrop-blur-sm">
            {vehicles.length > 0 ? (
              <div className="text-xs font-semibold text-foreground">총 {vehicles.length}대 모니터링 중</div>
            ) : (
              <div className="text-xs text-foreground">데이터를 연결하세요</div>
            )}
          </div>

          {/* 이동경로 정보 표시 - 상단으로 이동하여 주석 처리 */}
          {/* {selectedVehicle && routePoints.length > 0 && (
            <div className="absolute bottom-2 right-2 z-[1000] rounded-lg bg-blue-500/90 p-2 shadow-lg backdrop-blur-sm">
              <div className="flex items-center gap-2">
                <div className="text-xs text-white">
                  <div className="font-semibold">🛣️ {selectedVehicle.name} 이동경로</div>
                  <div>{routePoints.length}개 포인트</div>
                </div>
                <button
                  onClick={clearRoute}
                  className="rounded bg-white/20 px-2 py-1 text-xs text-white hover:bg-white/30"
                >
                  숨기기
                </button>
              </div>
            </div>
          )} */}
        </div>
      </div>
    </div>
  );
}