"use client";

import React, { useState, useEffect } from "react";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Button } from "@/components/ui/button";
import { Badge } from "@/components/ui/badge";
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Separator } from "@/components/ui/separator";
import { toast } from "sonner";
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
} from "@/components/ui/alert-dialog";
import { Search, Plus, X, Monitor, Settings } from "lucide-react";
import { menuScreenApi, screenApi } from "@/lib/api/screen";
import { ScreenDefinition } from "@/types/screen";
import type { MenuItem } from "@/lib/api/menu";

interface ScreenAssignmentTabProps {
  menus: MenuItem[];
}

export const ScreenAssignmentTab: React.FC<ScreenAssignmentTabProps> = ({ menus }) => {
  const [selectedMenuId, setSelectedMenuId] = useState<string>("");
  const [selectedMenu, setSelectedMenu] = useState<MenuItem | null>(null);
  const [assignedScreens, setAssignedScreens] = useState<ScreenDefinition[]>([]);
  const [availableScreens, setAvailableScreens] = useState<ScreenDefinition[]>([]);
  const [loading, setLoading] = useState(false);
  const [searchTerm, setSearchTerm] = useState("");
  const [showAssignDialog, setShowAssignDialog] = useState(false);
  const [showUnassignDialog, setShowUnassignDialog] = useState(false);
  const [selectedScreen, setSelectedScreen] = useState<ScreenDefinition | null>(null);

  // 디버그: 전달받은 메뉴 데이터 확인
  // console.log("ScreenAssignmentTab - 전달받은 메뉴 데이터:", {
  //   total: menus.length,
  //   sample: menus.slice(0, 3),
  //   keys: menus.length > 0 ? Object.keys(menus[0]) : [],
  // });

  // 메뉴 선택
  const handleMenuSelect = async (menuId: string) => {
    // console.log("메뉴 선택:", menuId);
    setSelectedMenuId(menuId);

    // 다양한 형식의 objid 대응
    const menu = menus.find((m) => {
      const objid = m.objid || m.OBJID || (m as any).objid;
      return objid?.toString() === menuId;
    });

    // console.log("선택된 메뉴:", menu);
    setSelectedMenu(menu || null);

    if (menu) {
      const objid = menu.objid || menu.OBJID || (menu as any).objid;
      if (objid) {
        await loadAssignedScreens(parseInt(objid.toString()));
      }
    }
  };

  // 할당된 화면 목록 로드
  const loadAssignedScreens = async (menuObjid: number) => {
    try {
      setLoading(true);
      const screens = await menuScreenApi.getScreensByMenu(menuObjid);
      setAssignedScreens(screens);
    } catch (error) {
    // console.error("할당된 화면 로드 실패:", error);
      toast.error("할당된 화면 목록을 불러오는데 실패했습니다.");
    } finally {
      setLoading(false);
    }
  };

  // 할당 가능한 화면 목록 로드
  const loadAvailableScreens = async () => {
    try {
      const response = await screenApi.getScreens({});
      const allScreens = response.data;

      // 이미 할당된 화면 제외
      const assignedScreenIds = assignedScreens.map((screen) => screen.screenId);
      const available = allScreens.filter((screen) => !assignedScreenIds.includes(screen.screenId));

      setAvailableScreens(available);
    } catch (error) {
    // console.error("사용 가능한 화면 로드 실패:", error);
      toast.error("사용 가능한 화면 목록을 불러오는데 실패했습니다.");
    }
  };

  // 화면 할당
  const handleAssignScreen = async () => {
    if (!selectedScreen || !selectedMenu) return;

    try {
      const objid = selectedMenu.objid || selectedMenu.OBJID || (selectedMenu as any).objid;
      if (!objid) {
        toast.error("메뉴 ID를 찾을 수 없습니다.");
        return;
      }

      await menuScreenApi.assignScreenToMenu(selectedScreen.screenId, parseInt(objid.toString()));
      toast.success("화면이 메뉴에 성공적으로 할당되었습니다.");

      // 목록 새로고침
      await loadAssignedScreens(parseInt(objid.toString()));
      setShowAssignDialog(false);
      setSelectedScreen(null);
    } catch (error) {
    // console.error("화면 할당 실패:", error);
      toast.error("화면 할당에 실패했습니다.");
    }
  };

  // 화면 할당 해제
  const handleUnassignScreen = async () => {
    if (!selectedScreen || !selectedMenu) return;

    try {
      const objid = selectedMenu.objid || selectedMenu.OBJID || (selectedMenu as any).objid;
      if (!objid) {
        toast.error("메뉴 ID를 찾을 수 없습니다.");
        return;
      }

      await menuScreenApi.unassignScreenFromMenu(selectedScreen.screenId, parseInt(objid.toString()));
      toast.success("화면-메뉴 할당이 해제되었습니다.");

      // 목록 새로고침
      await loadAssignedScreens(parseInt(objid.toString()));
      setShowUnassignDialog(false);
      setSelectedScreen(null);
    } catch (error) {
    // console.error("화면 할당 해제 실패:", error);
      toast.error("화면 할당 해제에 실패했습니다.");
    }
  };

  // 화면 할당 대화상자 열기
  const openAssignDialog = async () => {
    await loadAvailableScreens();
    setShowAssignDialog(true);
  };

  // 필터된 사용 가능한 화면
  const filteredAvailableScreens = availableScreens.filter(
    (screen) =>
      screen.screenName.toLowerCase().includes(searchTerm.toLowerCase()) ||
      screen.screenCode.toLowerCase().includes(searchTerm.toLowerCase()),
  );

  // 단순화된 메뉴 옵션 생성 (모든 메뉴를 평면적으로 표시)
  const getMenuOptions = (menuList: MenuItem[]): JSX.Element[] => {
    // console.log("메뉴 옵션 생성:", {
    //   total: menuList.length,
    //   sample: menuList.slice(0, 3).map((m) => ({
    //     objid: m.objid || m.OBJID || (m as any).objid,
    //     name: m.menu_name_kor || m.MENU_NAME_KOR || (m as any).menu_name_kor,
    //     parent: m.parent_obj_id || m.PARENT_OBJ_ID || (m as any).parent_obj_id,
    //   })),
    // });

    if (!menuList || menuList.length === 0) {
      // Radix UI Select v2.x: 빈 문자열 value="" 금지 → "__placeholder__" 사용
      return [
        <SelectItem key="no-menu" value="__placeholder__" disabled>
          메뉴가 없습니다
        </SelectItem>,
      ];
    }

    return menuList.map((menu, index) => {
      // 현재 메뉴의 ID와 이름 추출 (다양한 형식 대응)
      const menuObjid = menu.objid || menu.OBJID || (menu as any).objid;
      const menuName = menu.menu_name_kor || menu.MENU_NAME_KOR || (menu as any).menu_name_kor;
      const lev = menu.lev || menu.LEV || (menu as any).lev || 0;

      // 들여쓰기 (레벨에 따라)
      const indent = "　".repeat(Math.max(0, lev));

    // console.log("메뉴 항목:", { index, menuObjid, menuName, lev });

      return (
        <SelectItem key={menuObjid?.toString() || `menu-${index}`} value={menuObjid?.toString() || `menu-${index}`}>
          {indent}
          {menuName || `메뉴 ${index + 1}`}
        </SelectItem>
      );
    });
  };

  return (
    <div className="space-y-6">
      {/* 메뉴 선택 */}
      <Card>
        <CardHeader>
          <CardTitle className="flex items-center gap-2">
            <Settings className="h-5 w-5" />
            화면 할당 관리
          </CardTitle>
        </CardHeader>
        <CardContent>
          <div className="space-y-4">
            <div>
              <Label htmlFor="menu-select">메뉴 선택</Label>
              <Select value={selectedMenuId} onValueChange={handleMenuSelect}>
                <SelectTrigger>
                  <SelectValue placeholder="화면을 할당할 메뉴를 선택하세요" />
                </SelectTrigger>
                <SelectContent>{getMenuOptions(menus)}</SelectContent>
              </Select>
            </div>

            {selectedMenu && (
              <div className="rounded-lg border bg-muted p-4">
                <div className="flex items-center justify-between">
                  <div>
                    <h3 className="font-medium">
                      {selectedMenu.menu_name_kor ||
                        selectedMenu.MENU_NAME_KOR ||
                        (selectedMenu as any).menu_name_kor ||
                        "메뉴"}
                    </h3>
                    <p className="text-sm text-muted-foreground">
                      URL: {selectedMenu.menu_url || selectedMenu.MENU_URL || (selectedMenu as any).menu_url || "없음"}
                    </p>
                    <p className="text-sm text-muted-foreground">
                      설명:{" "}
                      {selectedMenu.menu_desc || selectedMenu.MENU_DESC || (selectedMenu as any).menu_desc || "없음"}
                    </p>
                  </div>
                  <Badge
                    variant={
                      (selectedMenu.status || selectedMenu.STATUS || (selectedMenu as any).status) === "active"
                        ? "default"
                        : "secondary"
                    }
                  >
                    {(selectedMenu.status || selectedMenu.STATUS || (selectedMenu as any).status) === "active"
                      ? "활성"
                      : "비활성"}
                  </Badge>
                </div>
              </div>
            )}
          </div>
        </CardContent>
      </Card>

      {/* 할당된 화면 목록 */}
      {selectedMenu && (
        <Card>
          <CardHeader>
            <div className="flex items-center justify-between">
              <CardTitle className="flex items-center gap-2">
                <Monitor className="h-5 w-5" />
                할당된 화면 ({assignedScreens.length}개)
              </CardTitle>
              <Button onClick={openAssignDialog} className="bg-primary hover:bg-primary/90">
                <Plus className="mr-2 h-4 w-4" />
                화면 할당
              </Button>
            </div>
          </CardHeader>
          <CardContent>
            {loading ? (
              <div className="py-8 text-center text-muted-foreground">로딩 중...</div>
            ) : assignedScreens.length === 0 ? (
              <div className="py-8 text-center text-muted-foreground">할당된 화면이 없습니다. 화면을 할당해보세요.</div>
            ) : (
              <div className="space-y-3">
                {assignedScreens.map((screen) => (
                  <div
                    key={screen.screenId}
                    className="flex items-center justify-between rounded-lg border p-4 hover:bg-muted"
                  >
                    <div className="flex-1">
                      <div className="flex items-center gap-3">
                        <h4 className="font-medium">{screen.screenName}</h4>
                        <Badge variant="outline" className="font-mono">
                          {screen.screenCode}
                        </Badge>
                        <Badge variant={screen.isActive === "Y" ? "default" : "secondary"}>
                          {screen.isActive === "Y" ? "활성" : "비활성"}
                        </Badge>
                      </div>
                      <p className="mt-1 text-sm text-muted-foreground">
                        테이블: {screen.tableName} | 생성일: {screen.createdDate.toLocaleDateString()}
                      </p>
                      {screen.description && <p className="mt-1 text-sm text-muted-foreground">{screen.description}</p>}
                    </div>
                    <Button
                      variant="outline"
                      size="sm"
                      onClick={() => {
                        setSelectedScreen(screen);
                        setShowUnassignDialog(true);
                      }}
                      className="text-destructive hover:text-destructive"
                    >
                      <X className="h-4 w-4" />
                    </Button>
                  </div>
                ))}
              </div>
            )}
          </CardContent>
        </Card>
      )}

      {/* 화면 할당 대화상자 */}
      <AlertDialog open={showAssignDialog} onOpenChange={setShowAssignDialog}>
        <AlertDialogContent className="max-w-2xl">
          <AlertDialogHeader>
            <AlertDialogTitle>화면 할당</AlertDialogTitle>
            <AlertDialogDescription>{selectedMenu?.menu_name_kor}에 할당할 화면을 선택하세요.</AlertDialogDescription>
          </AlertDialogHeader>

          <div className="space-y-4">
            {/* 검색 */}
            <div className="relative">
              <Search className="absolute top-1/2 left-3 h-4 w-4 -translate-y-1/2 transform text-muted-foreground/70" />
              <Input
                placeholder="화면명 또는 코드로 검색..."
                value={searchTerm}
                onChange={(e) => setSearchTerm(e.target.value)}
                className="pl-10"
              />
            </div>

            {/* 화면 목록 */}
            <div className="max-h-64 space-y-2 overflow-y-auto">
              {filteredAvailableScreens.length === 0 ? (
                <div className="py-4 text-center text-muted-foreground">할당 가능한 화면이 없습니다.</div>
              ) : (
                filteredAvailableScreens.map((screen) => (
                  <div
                    key={screen.screenId}
                    className={`cursor-pointer rounded-lg border p-3 transition-colors ${
                      selectedScreen?.screenId === screen.screenId ? "border-primary bg-accent" : "hover:bg-muted"
                    }`}
                    onClick={() => setSelectedScreen(screen)}
                  >
                    <div className="flex items-center gap-3">
                      <h4 className="font-medium">{screen.screenName}</h4>
                      <Badge variant="outline" className="font-mono text-xs">
                        {screen.screenCode}
                      </Badge>
                    </div>
                    <p className="mt-1 text-sm text-muted-foreground">테이블: {screen.tableName}</p>
                  </div>
                ))
              )}
            </div>
          </div>

          <AlertDialogFooter>
            <AlertDialogCancel onClick={() => setSelectedScreen(null)}>취소</AlertDialogCancel>
            <AlertDialogAction onClick={handleAssignScreen} disabled={!selectedScreen}>
              할당
            </AlertDialogAction>
          </AlertDialogFooter>
        </AlertDialogContent>
      </AlertDialog>

      {/* 화면 할당 해제 대화상자 */}
      <AlertDialog open={showUnassignDialog} onOpenChange={setShowUnassignDialog}>
        <AlertDialogContent>
          <AlertDialogHeader>
            <AlertDialogTitle>화면 할당 해제</AlertDialogTitle>
            <AlertDialogDescription>
              "{selectedScreen?.screenName}" 화면의 메뉴 할당을 해제하시겠습니까?
            </AlertDialogDescription>
          </AlertDialogHeader>
          <AlertDialogFooter>
            <AlertDialogCancel onClick={() => setSelectedScreen(null)}>취소</AlertDialogCancel>
            <AlertDialogAction onClick={handleUnassignScreen} className="bg-destructive hover:bg-red-700">
              할당 해제
            </AlertDialogAction>
          </AlertDialogFooter>
        </AlertDialogContent>
      </AlertDialog>
    </div>
  );
};
