"use client";

import React, { useState, useEffect, useCallback, useMemo } from "react";
import { DashboardElement, QueryResult } from "@/components/admin/dashboard/types";
import { ChartRenderer } from "@/components/admin/dashboard/charts/ChartRenderer";
import { DashboardProvider } from "@/contexts/DashboardContext";
import { RESOLUTIONS, Resolution } from "@/components/admin/dashboard/ResolutionSelector";
import dynamic from "next/dynamic";

// 위젯 동적 import - 모든 위젯
const MapSummaryWidget = dynamic(() => import("./widgets/MapSummaryWidget"), { ssr: false });
const MapTestWidget = dynamic(() => import("./widgets/MapTestWidget"), { ssr: false });
const MapTestWidgetV2 = dynamic(() => import("./widgets/MapTestWidgetV2"), { ssr: false });
const ChartTestWidget = dynamic(() => import("./widgets/ChartTestWidget"), { ssr: false });
const ListTestWidget = dynamic(
  () => import("./widgets/ListTestWidget").then((mod) => ({ default: mod.ListTestWidget })),
  { ssr: false },
);
const CustomMetricTestWidget = dynamic(() => import("./widgets/CustomMetricTestWidget"), { ssr: false });
const RiskAlertTestWidget = dynamic(() => import("./widgets/RiskAlertTestWidget"), { ssr: false });
const StatusSummaryWidget = dynamic(() => import("./widgets/StatusSummaryWidget"), { ssr: false });
const RiskAlertWidget = dynamic(() => import("./widgets/RiskAlertWidget"), { ssr: false });
const WeatherWidget = dynamic(() => import("./widgets/WeatherWidget"), { ssr: false });
const WeatherMapWidget = dynamic(() => import("./widgets/WeatherMapWidget"), { ssr: false });
const ExchangeWidget = dynamic(() => import("./widgets/ExchangeWidget"), { ssr: false });
const VehicleStatusWidget = dynamic(() => import("./widgets/VehicleStatusWidget"), { ssr: false });
const VehicleListWidget = dynamic(() => import("./widgets/VehicleListWidget"), { ssr: false });
const VehicleMapOnlyWidget = dynamic(() => import("./widgets/VehicleMapOnlyWidget"), { ssr: false });
const CargoListWidget = dynamic(() => import("./widgets/CargoListWidget"), { ssr: false });
const CustomerIssuesWidget = dynamic(() => import("./widgets/CustomerIssuesWidget"), { ssr: false });
const DeliveryStatusWidget = dynamic(() => import("./widgets/DeliveryStatusWidget"), { ssr: false });
const DeliveryStatusSummaryWidget = dynamic(() => import("./widgets/DeliveryStatusSummaryWidget"), { ssr: false });
const DeliveryTodayStatsWidget = dynamic(() => import("./widgets/DeliveryTodayStatsWidget"), { ssr: false });
const TaskWidget = dynamic(() => import("./widgets/TaskWidget"), { ssr: false });
const DocumentWidget = dynamic(() => import("./widgets/DocumentWidget"), { ssr: false });
const BookingAlertWidget = dynamic(() => import("./widgets/BookingAlertWidget"), { ssr: false });
const CalculatorWidget = dynamic(() => import("./widgets/CalculatorWidget"), { ssr: false });
const CalendarWidget = dynamic(
  () => import("@/components/admin/dashboard/widgets/CalendarWidget").then((mod) => ({ default: mod.CalendarWidget })),
  { ssr: false },
);
const ClockWidget = dynamic(
  () => import("@/components/admin/dashboard/widgets/ClockWidget").then((mod) => ({ default: mod.ClockWidget })),
  { ssr: false },
);
const ListWidget = dynamic(
  () => import("@/components/admin/dashboard/widgets/ListWidget").then((mod) => ({ default: mod.ListWidget })),
  { ssr: false },
);

const YardManagement3DWidget = dynamic(() => import("@/components/admin/dashboard/widgets/YardManagement3DWidget"), {
  ssr: false,
});

const WorkHistoryWidget = dynamic(() => import("./widgets/WorkHistoryWidget"), {
  ssr: false,
});

const CustomStatsWidget = dynamic(() => import("./widgets/CustomStatsWidget"), {
  ssr: false,
});

const CustomMetricWidget = dynamic(() => import("./widgets/CustomMetricWidget"), {
  ssr: false,
});

/**
 * 위젯 렌더링 함수 - DashboardSidebar의 모든 subtype 처리
 * ViewerElement에서 사용하기 위해 컴포넌트 외부에 정의
 */
function renderWidget(element: DashboardElement) {
  switch (element.subtype) {
    // 차트는 ChartRenderer에서 처리됨 (이 함수 호출 안됨)

    // === 위젯 종류 ===
    case "exchange":
      return <ExchangeWidget element={element} />;
    case "weather":
      return <WeatherWidget element={element} />;
    case "weather-map":
      return <WeatherMapWidget element={element} />;
    case "calculator":
      return <CalculatorWidget element={element} />;
    case "clock":
      return <ClockWidget element={element} />;
    case "map-summary":
      return <MapSummaryWidget element={element} />;
    case "map-test":
      return <MapTestWidget element={element} />;
    case "map-test-v2":
      return <MapTestWidgetV2 element={element} />;
    case "chart-test":
      return <ChartTestWidget element={element} />;
    case "list-test":
      return <ListTestWidget element={element} />;
    case "custom-metric-test":
      return <CustomMetricTestWidget element={element} />;
    case "risk-alert-test":
      return <RiskAlertTestWidget element={element} />;
    case "risk-alert":
      return <RiskAlertWidget element={element} />;
    case "calendar":
      return <CalendarWidget element={element} />;
    case "status-summary":
      return <StatusSummaryWidget element={element} />;
    case "custom-metric":
      return <CustomMetricWidget element={element} />;

    // === 운영/작업 지원 ===
    case "todo":
    case "maintenance":
      return <TaskWidget element={element} />;
    case "booking-alert":
      return <BookingAlertWidget element={element} />;
    case "document":
      return <DocumentWidget element={element} />;
    case "list":
      return <ListWidget element={element} />;

    case "yard-management-3d":
      // console.log("🏗️ 야드관리 위젯 렌더링:", {
      //   elementId: element.id,
      //   yardConfig: element.yardConfig,
      //   yardConfigType: typeof element.yardConfig,
      //   hasLayoutId: !!element.yardConfig?.layoutId,
      //   layoutId: element.yardConfig?.layoutId,
      //   layoutName: element.yardConfig?.layoutName,
      // });
      return <YardManagement3DWidget isEditMode={false} config={element.yardConfig} />;

    case "work-history":
      return <WorkHistoryWidget element={element} />;

    case "transport-stats":
      // console.log("📊 [DashboardViewer] CustomStatsWidget 렌더링:", {
      //   elementId: element.id,
      //   hasDataSource: !!element.dataSource,
      //   query: element.dataSource?.query?.substring(0, 50) + "...",
      //   dataSourceType: element.dataSource?.type,
      // });
      return <CustomStatsWidget element={element} />;

    // === 차량 관련 (추가 위젯) ===
    case "vehicle-status":
      return <VehicleStatusWidget element={element} />;
    case "vehicle-list":
      return <VehicleListWidget element={element} />;
    case "vehicle-map":
      return <VehicleMapOnlyWidget element={element} />;

    // === 배송 관련 (추가 위젯) ===
    case "delivery-status":
      return <DeliveryStatusWidget element={element} />;
    case "delivery-status-summary":
      return <DeliveryStatusSummaryWidget element={element} />;
    case "delivery-today-stats":
      return <DeliveryTodayStatsWidget element={element} />;
    case "cargo-list":
      return <CargoListWidget element={element} />;
    case "customer-issues":
      return <CustomerIssuesWidget element={element} />;

    // === 기본 fallback ===
    default:
      return (
        <div className="flex h-full w-full items-center justify-center bg-gradient-to-br from-gray-400 to-gray-600 p-4 text-white">
          <div className="text-center">
            <div className="mb-2 text-3xl">❓</div>
            <div className="text-sm">알 수 없는 위젯 타입: {element.subtype}</div>
          </div>
        </div>
      );
  }
}

interface DashboardViewerProps {
  elements: DashboardElement[];
  dashboardId?: string;
  refreshInterval?: number; // 전체 대시보드 새로고침 간격 (ms)
  backgroundColor?: string; // 배경색
  resolution?: string; // 대시보드 해상도
}

/**
 * 대시보드 뷰어 컴포넌트
 * - 저장된 대시보드를 읽기 전용으로 표시
 * - 실시간 데이터 업데이트
 * - 편집 화면과 동일한 레이아웃 (중앙 정렬, 고정 크기)
 */
export function DashboardViewer({
  elements,
  refreshInterval,
  backgroundColor = "#f9fafb",
  resolution = "fhd",
}: DashboardViewerProps) {
  const [elementData, setElementData] = useState<Record<string, QueryResult>>({});
  const [loadingElements, setLoadingElements] = useState<Set<string>>(new Set());

  // 캔버스 설정 계산
  const canvasConfig = useMemo(() => {
    return RESOLUTIONS[resolution as Resolution] || RESOLUTIONS.fhd;
  }, [resolution]);

  // 캔버스 높이 동적 계산
  const canvasHeight = useMemo(() => {
    if (elements.length === 0) {
      return canvasConfig.height;
    }
    const maxBottomY = Math.max(...elements.map((el) => el.position.y + el.size.height));
    return Math.max(canvasConfig.height, maxBottomY + 100);
  }, [elements, canvasConfig.height]);

  // 개별 요소 데이터 로딩
  const loadElementData = useCallback(async (element: DashboardElement) => {
    if (!element.dataSource?.query || element.type !== "chart") {
      return;
    }

    setLoadingElements((prev) => new Set([...prev, element.id]));

    try {
      let result;

      // 외부 DB vs 현재 DB 분기
      if (element.dataSource.connectionType === "external" && element.dataSource.externalConnectionId) {
        // 외부 DB
        const { ExternalDbConnectionAPI } = await import("@/lib/api/externalDbConnection");
        const externalResult = await ExternalDbConnectionAPI.executeQuery(
          parseInt(element.dataSource.externalConnectionId),
          element.dataSource.query,
        );

        if (!externalResult.success) {
          throw new Error(externalResult.message || "외부 DB 쿼리 실행 실패");
        }

        const data: QueryResult = {
          columns: externalResult.data?.[0] ? Object.keys(externalResult.data[0]) : [],
          rows: externalResult.data || [],
          totalRows: externalResult.data?.length || 0,
          executionTime: 0,
        };

        setElementData((prev) => ({
          ...prev,
          [element.id]: data,
        }));
      } else {
        // 현재 DB
        const { dashboardApi } = await import("@/lib/api/dashboard");
        result = await dashboardApi.executeQuery(element.dataSource.query);

        const data: QueryResult = {
          columns: result.columns || [],
          rows: result.rows || [],
          totalRows: result.rowCount || 0,
          executionTime: 0,
        };

        setElementData((prev) => ({
          ...prev,
          [element.id]: data,
        }));
      }
    } catch {
      // 에러 발생 시 무시 (차트는 빈 상태로 표시됨)
    } finally {
      setLoadingElements((prev) => {
        const newSet = new Set(prev);
        newSet.delete(element.id);
        return newSet;
      });
    }
  }, []);

  // 모든 요소 데이터 로딩
  const loadAllData = useCallback(async () => {
    const chartElements = elements.filter((el) => el.type === "chart" && el.dataSource?.query);

    // 병렬로 모든 차트 데이터 로딩
    await Promise.all(chartElements.map((element) => loadElementData(element)));
  }, [elements, loadElementData]);

  // 초기 데이터 로딩
  useEffect(() => {
    loadAllData();
  }, [loadAllData]);

  // 전체 새로고침 간격 설정
  useEffect(() => {
    if (!refreshInterval || refreshInterval === 0) {
      return;
    }

    const interval = setInterval(loadAllData, refreshInterval);
    return () => clearInterval(interval);
  }, [refreshInterval, loadAllData]);

  // 요소를 자연스러운 읽기 순서로 정렬 (왼쪽→오른쪽, 위→아래) - 태블릿 이하에서 세로 정렬 시 사용
  const sortedElements = useMemo(() => {
    return [...elements].sort((a, b) => {
      // Y 좌표 차이가 50px 이상이면 Y 우선 (같은 행으로 간주 안함)
      const yDiff = a.position.y - b.position.y;
      if (Math.abs(yDiff) > 50) {
        return yDiff;
      }
      // 같은 행이면 X 좌표로 정렬
      return a.position.x - b.position.x;
    });
  }, [elements]);

  // 요소가 없는 경우
  if (elements.length === 0) {
    return (
      <div className="flex h-full items-center justify-center bg-gray-50">
        <div className="text-center">
          <div className="mb-4 text-6xl">📊</div>
          <div className="mb-2 text-xl font-medium text-gray-700">표시할 요소가 없습니다</div>
          <div className="text-sm text-gray-500">대시보드 편집기에서 차트나 위젯을 추가해보세요</div>
        </div>
      </div>
    );
  }

  return (
    <DashboardProvider>
      {/* 데스크톱: 디자이너에서 설정한 위치 그대로 렌더링 (화면에 맞춰 비율 유지) */}
      <div className="hidden min-h-screen bg-gray-100 py-8 lg:block" style={{ backgroundColor }}>
        <div className="mx-auto px-4" style={{ maxWidth: `${canvasConfig.width}px` }}>
          <div
            className="relative rounded-lg"
            style={{
              width: "100%",
              minHeight: `${canvasConfig.height}px`,
              height: `${canvasHeight}px`,
              backgroundColor: backgroundColor,
            }}
          >
            {sortedElements.map((element) => (
              <ViewerElement
                key={element.id}
                element={element}
                data={elementData[element.id]}
                isLoading={loadingElements.has(element.id)}
                onRefresh={() => loadElementData(element)}
                isMobile={false}
                canvasWidth={canvasConfig.width}
              />
            ))}
          </div>
        </div>
      </div>

      {/* 태블릿 이하: 반응형 세로 정렬 */}
      <div className="block min-h-screen bg-gray-100 p-4 lg:hidden" style={{ backgroundColor }}>
        <div className="mx-auto max-w-3xl space-y-4">
          {sortedElements.map((element) => (
            <ViewerElement
              key={element.id}
              element={element}
              data={elementData[element.id]}
              isLoading={loadingElements.has(element.id)}
              onRefresh={() => loadElementData(element)}
              isMobile={true}
            />
          ))}
        </div>
      </div>
    </DashboardProvider>
  );
}

interface ViewerElementProps {
  element: DashboardElement;
  data?: QueryResult;
  isLoading: boolean;
  onRefresh: () => void;
  isMobile: boolean;
  canvasWidth?: number;
}

/**
 * 개별 뷰어 요소 컴포넌트
 * - 데스크톱(lg 이상): absolute positioning으로 디자이너에서 설정한 위치 그대로 렌더링 (너비는 화면 비율에 따라 조정)
 * - 태블릿 이하: 세로 스택 카드 레이아웃
 */
function ViewerElement({ element, data, isLoading, onRefresh, isMobile, canvasWidth = 1920 }: ViewerElementProps) {
  const [isMounted, setIsMounted] = useState(false);

  // 마운트 확인 (Leaflet 지도 초기화 문제 해결)
  useEffect(() => {
    setIsMounted(true);
  }, []);

  if (isMobile) {
    // 태블릿 이하: 세로 스택 카드 스타일
    return (
      <div
        className="relative overflow-hidden rounded-lg border border-gray-200 bg-white shadow-sm"
        style={{ minHeight: "300px" }}
      >
        {element.showHeader !== false && (
          <div className="flex items-center justify-between border-b border-gray-200 bg-gray-50 px-4 py-3">
            <h3 className="text-sm font-semibold text-gray-800">{element.customTitle || element.title}</h3>
            <button
              onClick={onRefresh}
              disabled={isLoading}
              className="text-gray-400 transition-colors hover:text-gray-600 disabled:opacity-50"
              title="새로고침"
            >
              <svg
                className={`h-4 w-4 ${isLoading ? "animate-spin" : ""}`}
                fill="none"
                viewBox="0 0 24 24"
                stroke="currentColor"
              >
                <path
                  strokeLinecap="round"
                  strokeLinejoin="round"
                  strokeWidth={2}
                  d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15"
                />
              </svg>
            </button>
          </div>
        )}
        <div className={element.showHeader !== false ? "p-4" : "p-4"} style={{ minHeight: "250px" }}>
          {!isMounted ? (
            <div className="flex h-full w-full items-center justify-center">
              <div className="h-6 w-6 animate-spin rounded-full border-2 border-blue-500 border-t-transparent" />
            </div>
          ) : element.type === "chart" ? (
            <ChartRenderer element={element} data={data} width={undefined} height={250} />
          ) : (
            renderWidget(element)
          )}
        </div>
        {isLoading && (
          <div className="bg-opacity-75 absolute inset-0 flex items-center justify-center bg-white">
            <div className="text-center">
              <div className="mx-auto mb-2 h-6 w-6 animate-spin rounded-full border-2 border-blue-500 border-t-transparent" />
              <div className="text-sm text-gray-600">업데이트 중...</div>
            </div>
          </div>
        )}
      </div>
    );
  }

  // 데스크톱: 디자이너에서 설정한 위치 그대로 absolute positioning
  // 단, 너비는 화면 크기에 따라 비율로 조정
  const widthPercentage = (element.size.width / canvasWidth) * 100;

  return (
    <div
      className="absolute overflow-hidden rounded-lg border border-gray-200 bg-white shadow-sm"
      style={{
        left: `${(element.position.x / canvasWidth) * 100}%`,
        top: element.position.y,
        width: `${widthPercentage}%`,
        height: element.size.height,
      }}
    >
      {element.showHeader !== false && (
        <div className="flex items-center justify-between border-b border-gray-200 bg-gray-50 px-4 py-3">
          <h3 className="text-sm font-semibold text-gray-800">{element.customTitle || element.title}</h3>
          <button
            onClick={onRefresh}
            disabled={isLoading}
            className="text-gray-400 transition-colors hover:text-gray-600 disabled:opacity-50"
            title="새로고침"
          >
            <svg
              className={`h-4 w-4 ${isLoading ? "animate-spin" : ""}`}
              fill="none"
              viewBox="0 0 24 24"
              stroke="currentColor"
            >
              <path
                strokeLinecap="round"
                strokeLinejoin="round"
                strokeWidth={2}
                d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15"
              />
            </svg>
          </button>
        </div>
      )}
      <div className={element.showHeader !== false ? "h-[calc(100%-50px)] w-full" : "h-full w-full"}>
        {!isMounted ? (
          <div className="flex h-full w-full items-center justify-center">
            <div className="h-6 w-6 animate-spin rounded-full border-2 border-blue-500 border-t-transparent" />
          </div>
        ) : element.type === "chart" ? (
          <ChartRenderer
            element={element}
            data={data}
            width={undefined}
            height={element.showHeader !== false ? element.size.height - 50 : element.size.height}
          />
        ) : (
          renderWidget(element)
        )}
      </div>
      {isLoading && (
        <div className="bg-opacity-75 absolute inset-0 flex items-center justify-center bg-white">
          <div className="text-center">
            <div className="mx-auto mb-2 h-6 w-6 animate-spin rounded-full border-2 border-blue-500 border-t-transparent" />
            <div className="text-sm text-gray-600">업데이트 중...</div>
          </div>
        </div>
      )}
    </div>
  );
}