"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 { RealtimePreview } from "@/components/screen/RealtimePreviewDynamic";

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);
  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  const [formData, setFormData] = useState<Record<string, unknown>>({});

  // 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]);

  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;
  const screenHeight = layout?.screenResolution?.height || 800;

  return (
    <div className="bg-background h-full w-full">
      {/* 절대 위치 기반 렌더링 */}
      {layout && layout.components.length > 0 ? (
        <div
          className="bg-background relative mx-auto"
          style={{
            width: screenWidth,
            minHeight: screenHeight,
          }}
        >
          {/* 최상위 컴포넌트들 렌더링 */}
          {layout.components
            .filter((component) => !component.parentId)
            .map((component) => (
              <RealtimePreview
                key={component.id}
                component={component}
                isSelected={false}
                isDesignMode={false}
                onClick={() => {}}
              >
                {/* 자식 컴포넌트들 */}
                {(component.type === "group" || component.type === "container" || component.type === "area") &&
                  layout.components
                    .filter((child) => child.parentId === component.id)
                    .map((child) => {
                      // 자식 컴포넌트의 위치를 부모 기준 상대 좌표로 조정
                      const relativeChildComponent = {
                        ...child,
                        position: {
                          x: child.position.x - component.position.x,
                          y: child.position.y - component.position.y,
                          z: child.position.z || 1,
                        },
                      };

                      return (
                        <RealtimePreview
                          key={child.id}
                          component={relativeChildComponent}
                          isSelected={false}
                          isDesignMode={false}
                          onClick={() => {}}
                        />
                      );
                    })}
              </RealtimePreview>
            ))}
        </div>
      ) : (
        // 빈 화면일 때
        <div className="bg-background flex items-center justify-center" style={{ minHeight: screenHeight }}>
          <div className="text-center">
            <div className="bg-muted mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-full shadow-sm">
              <span className="text-2xl">📄</span>
            </div>
            <h2 className="text-foreground mb-2 text-xl font-semibold">화면이 비어있습니다</h2>
            <p className="text-muted-foreground">이 화면에는 아직 설계된 컴포넌트가 없습니다.</p>
          </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>
  );
}