"use client";

import React, { useState, useEffect } from "react";
import {
  ResizableDialog,
  ResizableDialogContent,
  ResizableDialogHeader,
  ResizableDialogTitle,
  ResizableDialogDescription,
  ResizableDialogFooter,
} from "@/components/ui/resizable-dialog";
import { InteractiveScreenViewerDynamic } from "@/components/screen/InteractiveScreenViewerDynamic";
import { screenApi } from "@/lib/api/screen";
import { ComponentData } from "@/types/screen";
import { toast } from "sonner";
import { dynamicFormApi } from "@/lib/api/dynamicForm";
import { useAuth } from "@/hooks/useAuth";

interface EditModalState {
  isOpen: boolean;
  screenId: number | null;
  title: string;
  description?: string;
  modalSize: "sm" | "md" | "lg" | "xl";
  editData: Record<string, any>;
  onSave?: () => void;
}

interface EditModalProps {
  className?: string;
}

export const EditModal: React.FC<EditModalProps> = ({ className }) => {
  const { user } = useAuth();
  const [modalState, setModalState] = useState<EditModalState>({
    isOpen: false,
    screenId: null,
    title: "",
    description: "",
    modalSize: "md",
    editData: {},
    onSave: undefined,
  });

  const [screenData, setScreenData] = useState<{
    components: ComponentData[];
    screenInfo: any;
  } | null>(null);

  const [loading, setLoading] = useState(false);
  const [screenDimensions, setScreenDimensions] = useState<{
    width: number;
    height: number;
    offsetX?: number;
    offsetY?: number;
  } | null>(null);

  // 폼 데이터 상태 (편집 데이터로 초기화됨)
  const [formData, setFormData] = useState<Record<string, any>>({});
  const [originalData, setOriginalData] = useState<Record<string, any>>({});

  // 화면의 실제 크기 계산 함수 (ScreenModal과 동일)
  const calculateScreenDimensions = (components: ComponentData[]) => {
    if (components.length === 0) {
      return {
        width: 400,
        height: 300,
        offsetX: 0,
        offsetY: 0,
      };
    }

    // 모든 컴포넌트의 경계 찾기
    let minX = Infinity;
    let minY = Infinity;
    let maxX = -Infinity;
    let maxY = -Infinity;

    components.forEach((component) => {
      const x = parseFloat(component.position?.x?.toString() || "0");
      const y = parseFloat(component.position?.y?.toString() || "0");
      const width = parseFloat(component.size?.width?.toString() || "100");
      const height = parseFloat(component.size?.height?.toString() || "40");

      minX = Math.min(minX, x);
      minY = Math.min(minY, y);
      maxX = Math.max(maxX, x + width);
      maxY = Math.max(maxY, y + height);
    });

    // 실제 컨텐츠 크기 계산
    const contentWidth = maxX - minX;
    const contentHeight = maxY - minY;

    // 적절한 여백 추가
    const paddingX = 40;
    const paddingY = 40;

    const finalWidth = Math.max(contentWidth + paddingX, 400);
    const finalHeight = Math.max(contentHeight + paddingY, 300);

    return {
      width: Math.min(finalWidth, window.innerWidth * 0.95),
      height: Math.min(finalHeight, window.innerHeight * 0.9),
      offsetX: Math.max(0, minX - paddingX / 2),
      offsetY: Math.max(0, minY - paddingY / 2),
    };
  };

  // 전역 모달 이벤트 리스너
  useEffect(() => {
    const handleOpenEditModal = (event: CustomEvent) => {
      const { screenId, title, description, modalSize, editData, onSave } = event.detail;

      setModalState({
        isOpen: true,
        screenId,
        title,
        description: description || "",
        modalSize: modalSize || "lg",
        editData: editData || {},
        onSave,
      });

      // 편집 데이터로 폼 데이터 초기화
      setFormData(editData || {});
      setOriginalData(editData || {});
    };

    const handleCloseEditModal = () => {
      // 부모 컴포넌트의 onSave 콜백 실행 (테이블 새로고침)
      if (modalState.onSave) {
        try {
          modalState.onSave();
        } catch (callbackError) {
          console.error("⚠️ onSave 콜백 에러:", callbackError);
        }
      }

      // 모달 닫기
      handleClose();
    };

    window.addEventListener("openEditModal", handleOpenEditModal as EventListener);
    window.addEventListener("closeEditModal", handleCloseEditModal);

    return () => {
      window.removeEventListener("openEditModal", handleOpenEditModal as EventListener);
      window.removeEventListener("closeEditModal", handleCloseEditModal);
    };
  }, [modalState.onSave]); // modalState.onSave를 의존성에 추가하여 최신 콜백 참조

  // 화면 데이터 로딩
  useEffect(() => {
    if (modalState.isOpen && modalState.screenId) {
      loadScreenData(modalState.screenId);
    }
  }, [modalState.isOpen, modalState.screenId]);

  const loadScreenData = async (screenId: number) => {
    try {
      setLoading(true);

      console.log("화면 데이터 로딩 시작:", screenId);

      // 화면 정보와 레이아웃 데이터 로딩
      const [screenInfo, layoutData] = await Promise.all([
        screenApi.getScreen(screenId),
        screenApi.getLayout(screenId),
      ]);

      console.log("API 응답:", { screenInfo, layoutData });

      if (screenInfo && layoutData) {
        const components = layoutData.components || [];

        // 화면의 실제 크기 계산
        const dimensions = calculateScreenDimensions(components);
        setScreenDimensions(dimensions);

        setScreenData({
          components,
          screenInfo: screenInfo,
        });
        console.log("화면 데이터 설정 완료:", {
          componentsCount: components.length,
          dimensions,
          screenInfo,
        });
      } else {
        throw new Error("화면 데이터가 없습니다");
      }
    } catch (error) {
      console.error("화면 데이터 로딩 오류:", error);
      toast.error("화면을 불러오는 중 오류가 발생했습니다.");
      handleClose();
    } finally {
      setLoading(false);
    }
  };

  const handleClose = () => {
    setModalState({
      isOpen: false,
      screenId: null,
      title: "",
      description: "",
      modalSize: "md",
      editData: {},
      onSave: undefined,
    });
    setScreenData(null);
    setFormData({});
    setOriginalData({});
  };

  // 저장 버튼 클릭 시 - UPDATE 액션 실행
  const handleSave = async () => {
    if (!screenData?.screenInfo?.tableName) {
      toast.error("테이블 정보가 없습니다.");
      return;
    }

    try {
      // 변경된 필드만 추출
      const changedData: Record<string, any> = {};
      Object.keys(formData).forEach((key) => {
        if (formData[key] !== originalData[key]) {
          changedData[key] = formData[key];
        }
      });

      if (Object.keys(changedData).length === 0) {
        toast.info("변경된 내용이 없습니다.");
        handleClose();
        return;
      }

      // 기본키 확인 (id 또는 첫 번째 키)
      const recordId = originalData.id || Object.values(originalData)[0];

      // UPDATE 액션 실행
      const response = await dynamicFormApi.updateFormDataPartial(
        recordId,
        originalData,
        changedData,
        screenData.screenInfo.tableName,
      );

      if (response.success) {
        toast.success("데이터가 수정되었습니다.");

        // 부모 컴포넌트의 onSave 콜백 실행 (테이블 새로고침)
        if (modalState.onSave) {
          try {
            modalState.onSave();
          } catch (callbackError) {
            console.error("⚠️ onSave 콜백 에러:", callbackError);
          }
        }

        handleClose();
      } else {
        throw new Error(response.message || "수정에 실패했습니다.");
      }
    } catch (error: any) {
      console.error("❌ 수정 실패:", error);
      toast.error(error.message || "데이터 수정 중 오류가 발생했습니다.");
    }
  };

  // 모달 크기 설정 - ScreenModal과 동일
  const getModalStyle = () => {
    if (!screenDimensions) {
      return {
        className: "w-fit min-w-[400px] max-w-4xl max-h-[90vh] overflow-hidden p-0",
        style: {},
      };
    }

    const headerHeight = 60;
    const totalHeight = screenDimensions.height + headerHeight;

    return {
      className: "overflow-hidden p-0",
      style: {
        width: `${Math.min(screenDimensions.width, window.innerWidth * 0.98)}px`,
        height: `${Math.min(totalHeight, window.innerHeight * 0.95)}px`,
        maxWidth: "98vw",
        maxHeight: "95vh",
      },
    };
  };

  const modalStyle = getModalStyle();

  return (
    <ResizableDialog open={modalState.isOpen} onOpenChange={handleClose}>
      <ResizableDialogContent 
        className={`${modalStyle.className} ${className || ""}`} 
        style={modalStyle.style}
        defaultWidth={800}
        defaultHeight={600}
        minWidth={600}
        minHeight={400}
        maxWidth={1400}
        maxHeight={1000}
        modalId={modalState.screenId ? `edit-modal-${modalState.screenId}` : undefined}
        userId={user?.userId}
      >
        <ResizableDialogHeader className="shrink-0 border-b px-4 py-3">
          <div className="flex items-center gap-2">
            <ResizableDialogTitle className="text-base">{modalState.title || "데이터 수정"}</ResizableDialogTitle>
            {modalState.description && !loading && (
              <ResizableDialogDescription className="text-muted-foreground text-xs">{modalState.description}</ResizableDialogDescription>
            )}
            {loading && (
              <ResizableDialogDescription className="text-xs">{loading ? "화면을 불러오는 중입니다..." : ""}</ResizableDialogDescription>
            )}
          </div>
        </ResizableDialogHeader>

        <div className="flex flex-1 items-center justify-center overflow-auto">
          {loading ? (
            <div className="flex h-full items-center justify-center">
              <div className="text-center">
                <div className="mx-auto mb-4 h-8 w-8 animate-spin rounded-full border-b-2 border-blue-600"></div>
                <p className="text-muted-foreground">화면을 불러오는 중...</p>
              </div>
            </div>
          ) : screenData ? (
            <div
              className="relative bg-white"
              style={{
                width: screenDimensions?.width || 800,
                height: screenDimensions?.height || 600,
                transformOrigin: "center center",
                maxWidth: "100%",
                maxHeight: "100%",
              }}
            >
              {screenData.components.map((component) => {
                // 컴포넌트 위치를 offset만큼 조정
                const offsetX = screenDimensions?.offsetX || 0;
                const offsetY = screenDimensions?.offsetY || 0;

                const adjustedComponent = {
                  ...component,
                  position: {
                    ...component.position,
                    x: parseFloat(component.position?.x?.toString() || "0") - offsetX,
                    y: parseFloat(component.position?.y?.toString() || "0") - offsetY,
                  },
                };

                return (
                  <InteractiveScreenViewerDynamic
                    key={component.id}
                    component={adjustedComponent}
                    allComponents={screenData.components}
                    formData={formData}
                    onFormDataChange={(fieldName, value) => {
                      setFormData((prev) => ({
                        ...prev,
                        [fieldName]: value,
                      }));
                    }}
                    screenInfo={{
                      id: modalState.screenId!,
                      tableName: screenData.screenInfo?.tableName,
                    }}
                    onSave={handleSave}
                  />
                );
              })}
            </div>
          ) : (
            <div className="flex h-full items-center justify-center">
              <p className="text-muted-foreground">화면 데이터가 없습니다.</p>
            </div>
          )}
        </div>
      </ResizableDialogContent>
    </ResizableDialog>
  );
};

export default EditModal;