import React, { useState, useRef } from "react";
import { Button } from "@/components/ui/button";
import { Monitor, Maximize2, ZoomIn, ZoomOut } from "lucide-react";
import { useContainerSize } from "@/hooks/useViewportSize";

interface ResponsiveDesignerContainerProps {
  children: React.ReactNode;
  designWidth: number;
  designHeight: number;
  screenName?: string;
  onScaleChange?: (scale: number) => void;
}

type DesignerViewMode = "fit" | "original" | "custom";

/**
 * 화면 디자이너용 반응형 컨테이너
 * 편집 작업을 위해 원본 크기 유지하면서도 뷰포트에 맞춰 조정 가능
 */
export const ResponsiveDesignerContainer: React.FC<ResponsiveDesignerContainerProps> = ({
  children,
  designWidth,
  designHeight,
  screenName,
  onScaleChange,
}) => {
  const containerRef = useRef<HTMLDivElement>(null);
  const [viewMode, setViewMode] = useState<DesignerViewMode>("original");
  const [customScale, setCustomScale] = useState(1);
  const containerSize = useContainerSize(containerRef);

  // 스케일 계산
  const calculateScale = (): number => {
    if (containerSize.width === 0 || containerSize.height === 0) return 1;

    switch (viewMode) {
      case "fit":
        // 컨테이너에 맞춰 비율 유지하며 조정 (좌우 여백 16px씩 유지)
        const scaleX = (containerSize.width - 32) / designWidth;
        const scaleY = (containerSize.height - 64) / designHeight;
        return Math.min(scaleX, scaleY, 2); // 최대 2배까지 허용

      case "custom":
        return customScale;

      case "original":
      default:
        return 1;
    }
  };

  const scale = calculateScale();

  // 스케일 변경 시 콜백 호출
  React.useEffect(() => {
    onScaleChange?.(scale);
  }, [scale, onScaleChange]);

  const handleZoomIn = () => {
    const newScale = Math.min(customScale * 1.1, 3);
    setCustomScale(newScale);
    setViewMode("custom");
  };

  const handleZoomOut = () => {
    const newScale = Math.max(customScale * 0.9, 0.1);
    setCustomScale(newScale);
    setViewMode("custom");
  };

  const getViewModeInfo = (mode: DesignerViewMode) => {
    switch (mode) {
      case "fit":
        return {
          label: "화면 맞춤",
          description: "뷰포트에 맞춰 자동 조정",
          icon: <Monitor className="h-4 w-4" />,
        };
      case "original":
        return {
          label: "원본 크기",
          description: "설계 해상도 100% 표시",
          icon: <Maximize2 className="h-4 w-4" />,
        };
      case "custom":
        return {
          label: `사용자 정의 (${Math.round(customScale * 100)}%)`,
          description: "사용자가 조정한 배율",
          icon: <ZoomIn className="h-4 w-4" />,
        };
    }
  };

  const screenStyle = {
    width: `${designWidth}px`,
    height: `${designHeight}px`,
    transform: `scale(${scale})`,
    transformOrigin: "top left",
    transition: "transform 0.3s ease-in-out",
  };

  const wrapperStyle = {
    width: `${designWidth * scale}px`,
    height: `${designHeight * scale}px`,
    overflow: "hidden",
  };

  return (
    <div className="flex h-full w-full flex-col bg-gray-100">
      {/* 상단 컨트롤 바 */}
      <div className="flex items-center justify-between border-b bg-white px-4 py-2 shadow-sm">
        <div className="flex items-center space-x-2">
          <span className="text-sm font-medium text-gray-700">
            {screenName && `${screenName} - `}
            {designWidth} × {designHeight}
          </span>
          <span className="text-xs text-gray-500">
            (배율: {Math.round(scale * 100)}% | 컨테이너: {containerSize.width}×{containerSize.height})
          </span>
        </div>

        <div className="flex items-center space-x-1">
          {/* 줌 컨트롤 */}
          <Button variant="ghost" size="sm" onClick={handleZoomOut} className="h-8 w-8 p-0" title="축소">
            <ZoomOut className="h-4 w-4" />
          </Button>

          <span className="min-w-[60px] px-2 text-center text-xs text-muted-foreground">{Math.round(scale * 100)}%</span>

          <Button variant="ghost" size="sm" onClick={handleZoomIn} className="h-8 w-8 p-0" title="확대">
            <ZoomIn className="h-4 w-4" />
          </Button>

          {/* 뷰 모드 버튼 */}
          {(["fit", "original"] as DesignerViewMode[]).map((mode) => {
            const info = getViewModeInfo(mode);
            return (
              <Button
                key={mode}
                variant={viewMode === mode ? "default" : "ghost"}
                size="sm"
                onClick={() => setViewMode(mode)}
                className="h-8 text-xs"
                title={info.description}
              >
                {info.icon}
                <span className="ml-1 hidden sm:inline">{info.label}</span>
              </Button>
            );
          })}
        </div>
      </div>

      {/* 디자인 영역 */}
      <div
        ref={containerRef}
        className="flex-1 overflow-auto px-4 py-8"
        style={{
          justifyContent: "center",
          alignItems: "flex-start",
          display: "flex",
        }}
      >
        <div style={wrapperStyle}>
          <div style={screenStyle}>{children}</div>
        </div>
      </div>
    </div>
  );
};

export default ResponsiveDesignerContainer;