"use client";

import React, { useEffect, useState } from "react";
import { useParams } from "next/navigation";
import { Button } from "@/components/ui/button";
import { Loader2 } from "lucide-react";
import { screenApi } from "@/lib/api/screen";
import { ScreenDefinition, LayoutData } from "@/types/screen";
import { useRouter } from "next/navigation";
import { toast } from "sonner";
import { initializeComponents } from "@/lib/registry/components";
import { EditModal } from "@/components/screen/EditModal";
import { ResponsiveLayoutEngine } from "@/components/screen/ResponsiveLayoutEngine";
import { useBreakpoint } from "@/hooks/useBreakpoint";

export default function ScreenViewPage() {
  const params = useParams();
  const router = useRouter();
  const screenId = parseInt(params.screenId as string);

  const [screen, setScreen] = useState<ScreenDefinition | null>(null);
  const [layout, setLayout] = useState<LayoutData | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [formData, setFormData] = useState<Record<string, unknown>>({});

  // 화면 너비에 따라 Y좌표 유지 여부 결정
  const [preserveYPosition, setPreserveYPosition] = useState(true);

  const breakpoint = useBreakpoint();

  // 편집 모달 상태
  const [editModalOpen, setEditModalOpen] = useState(false);
  const [editModalConfig, setEditModalConfig] = useState<{
    screenId?: number;
    modalSize?: "sm" | "md" | "lg" | "xl" | "full";
    editData?: Record<string, unknown>;
    onSave?: () => void;
    modalTitle?: string;
    modalDescription?: string;
  }>({});

  useEffect(() => {
    const initComponents = async () => {
      try {
        console.log("🚀 할당된 화면에서 컴포넌트 시스템 초기화 시작...");
        await initializeComponents();
        console.log("✅ 할당된 화면에서 컴포넌트 시스템 초기화 완료");
      } catch (error) {
        console.error("❌ 할당된 화면에서 컴포넌트 시스템 초기화 실패:", error);
      }
    };

    initComponents();
  }, []);

  // 편집 모달 이벤트 리스너 등록
  useEffect(() => {
    const handleOpenEditModal = (event: CustomEvent) => {
      console.log("🎭 편집 모달 열기 이벤트 수신:", event.detail);

      setEditModalConfig({
        screenId: event.detail.screenId,
        modalSize: event.detail.modalSize,
        editData: event.detail.editData,
        onSave: event.detail.onSave,
        modalTitle: event.detail.modalTitle,
        modalDescription: event.detail.modalDescription,
      });
      setEditModalOpen(true);
    };

    // @ts-expect-error - CustomEvent type
    window.addEventListener("openEditModal", handleOpenEditModal);

    return () => {
      // @ts-expect-error - CustomEvent type
      window.removeEventListener("openEditModal", handleOpenEditModal);
    };
  }, []);

  useEffect(() => {
    const loadScreen = async () => {
      try {
        setLoading(true);
        setError(null);

        // 화면 정보 로드
        const screenData = await screenApi.getScreen(screenId);
        setScreen(screenData);

        // 레이아웃 로드
        try {
          const layoutData = await screenApi.getLayout(screenId);
          setLayout(layoutData);
        } catch (layoutError) {
          console.warn("레이아웃 로드 실패, 빈 레이아웃 사용:", layoutError);
          setLayout({
            screenId,
            components: [],
            gridSettings: {
              columns: 12,
              gap: 16,
              padding: 16,
              enabled: true,
              size: 8,
              color: "#e0e0e0",
              opacity: 0.5,
              snapToGrid: true,
            },
          });
        }
      } catch (error) {
        console.error("화면 로드 실패:", error);
        setError("화면을 불러오는데 실패했습니다.");
        toast.error("화면을 불러오는데 실패했습니다.");
      } finally {
        setLoading(false);
      }
    };

    if (screenId) {
      loadScreen();
    }
  }, [screenId]);

  // 윈도우 크기 변경 감지 - layout이 로드된 후에만 실행
  useEffect(() => {
    if (!layout) return;

    const screenWidth = layout?.screenResolution?.width || 1200;

    const handleResize = () => {
      const shouldPreserve = window.innerWidth >= screenWidth - 100;
      setPreserveYPosition(shouldPreserve);
    };

    window.addEventListener("resize", handleResize);
    // 초기 값도 설정
    handleResize();

    return () => window.removeEventListener("resize", handleResize);
  }, [layout]);

  if (loading) {
    return (
      <div className="flex h-full min-h-[400px] w-full items-center justify-center bg-gradient-to-br from-gray-50 to-slate-100">
        <div className="rounded-xl border border-gray-200/60 bg-white p-8 text-center shadow-lg">
          <Loader2 className="mx-auto h-10 w-10 animate-spin text-blue-600" />
          <p className="mt-4 font-medium text-gray-700">화면을 불러오는 중...</p>
        </div>
      </div>
    );
  }

  if (error || !screen) {
    return (
      <div className="flex h-full min-h-[400px] w-full items-center justify-center bg-gradient-to-br from-gray-50 to-slate-100">
        <div className="max-w-md rounded-xl border border-gray-200/60 bg-white p-8 text-center shadow-lg">
          <div className="mx-auto mb-6 flex h-20 w-20 items-center justify-center rounded-full bg-gradient-to-br from-red-100 to-orange-100 shadow-sm">
            <span className="text-3xl">⚠️</span>
          </div>
          <h2 className="mb-3 text-xl font-bold text-gray-900">화면을 찾을 수 없습니다</h2>
          <p className="mb-6 leading-relaxed text-gray-600">{error || "요청하신 화면이 존재하지 않습니다."}</p>
          <Button onClick={() => router.back()} variant="outline" className="rounded-lg">
            이전으로 돌아가기
          </Button>
        </div>
      </div>
    );
  }

  // 화면 해상도 정보가 있으면 해당 크기로, 없으면 기본 크기 사용
  const screenWidth = layout?.screenResolution?.width || 1200;

  return (
    <div className="h-full w-full bg-white">
      <div style={{ padding: "16px 0" }}>
        {/* 항상 반응형 모드로 렌더링 */}
        {layout && layout.components.length > 0 ? (
          <ResponsiveLayoutEngine
            components={layout?.components || []}
            breakpoint={breakpoint}
            containerWidth={window.innerWidth}
            screenWidth={screenWidth}
            preserveYPosition={preserveYPosition}
            isDesignMode={false}
            formData={formData}
            onFormDataChange={(fieldName: string, value: unknown) => {
              console.log("📝 page.tsx formData 업데이트:", fieldName, value);
              setFormData((prev) => ({ ...prev, [fieldName]: value }));
            }}
            screenInfo={{ id: screenId, tableName: screen?.tableName }}
          />
        ) : (
          // 빈 화면일 때
          <div className="flex items-center justify-center bg-white" style={{ minHeight: "600px" }}>
            <div className="text-center">
              <div className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-full bg-white shadow-sm">
                <span className="text-2xl">📄</span>
              </div>
              <h2 className="mb-2 text-xl font-semibold text-gray-900">화면이 비어있습니다</h2>
              <p className="text-gray-600">이 화면에는 아직 설계된 컴포넌트가 없습니다.</p>
            </div>
          </div>
        )}
      </div>

      {/* 편집 모달 */}
      <EditModal
        isOpen={editModalOpen}
        onClose={() => {
          setEditModalOpen(false);
          setEditModalConfig({});
        }}
        screenId={editModalConfig.screenId}
        modalSize={editModalConfig.modalSize}
        editData={editModalConfig.editData}
        onSave={editModalConfig.onSave}
        modalTitle={editModalConfig.modalTitle}
        modalDescription={editModalConfig.modalDescription}
        onDataChange={(changedFormData) => {
          console.log("📝 EditModal에서 데이터 변경 수신:", changedFormData);
          // 변경된 데이터를 메인 폼에 반영
          setFormData((prev) => {
            const updatedFormData = {
              ...prev,
              ...changedFormData, // 변경된 필드들만 업데이트
            };
            console.log("📊 메인 폼 데이터 업데이트:", updatedFormData);
            return updatedFormData;
          });
        }}
      />
    </div>
  );
}