"use client";

/**
 * 날씨 위젯 컴포넌트
 * - 실시간 날씨 정보를 표시
 */

import React, { useEffect, useState } from "react";
import { getWeather, WeatherData } from "@/lib/api/openApi";
import {
  Cloud,
  CloudRain,
  Sun,
  CloudSnow,
  Wind,
  Droplets,
  Gauge,
  RefreshCw,
  Check,
  ChevronsUpDown,
  Settings,
} from "lucide-react";
import { Button } from "@/components/ui/button";
import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover";
import { Command, CommandEmpty, CommandGroup, CommandInput, CommandItem, CommandList } from "@/components/ui/command";
import { cn } from "@/lib/utils";
import { DashboardElement } from "@/components/admin/dashboard/types";

interface WeatherWidgetProps {
  element?: DashboardElement;
  city?: string;
  refreshInterval?: number; // 새로고침 간격 (ms), 기본값: 600000 (10분)
}

export default function WeatherWidget({ element, city = "서울", refreshInterval = 600000 }: WeatherWidgetProps) {
  const [open, setOpen] = useState(false);
  const [settingsOpen, setSettingsOpen] = useState(false);
  const [selectedCity, setSelectedCity] = useState(city);
  const [weather, setWeather] = useState<WeatherData | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [lastUpdated, setLastUpdated] = useState<Date | null>(null);

  // 표시할 날씨 정보 선택
  const [selectedItems, setSelectedItems] = useState<string[]>([
    "temperature",
    "feelsLike",
    "humidity",
    "windSpeed",
    "pressure",
  ]);

  // 날씨 항목 정의
  const weatherItems = [
    { id: "temperature", label: "기온", icon: Sun },
    { id: "feelsLike", label: "체감온도", icon: Sun },
    { id: "humidity", label: "습도", icon: Droplets },
    { id: "windSpeed", label: "풍속", icon: Wind },
    { id: "pressure", label: "기압", icon: Gauge },
  ];

  // 항목 토글
  const toggleItem = (itemId: string) => {
    setSelectedItems((prev) => (prev.includes(itemId) ? prev.filter((id) => id !== itemId) : [...prev, itemId]));
  };

  // 도시 목록 (전국 시/군/구 단위)
  const cities = [
    // 서울특별시 (25개 구)
    { value: "서울", label: "서울" },
    { value: "종로구", label: "서울 종로구" },
    { value: "중구", label: "서울 중구" },
    { value: "용산구", label: "서울 용산구" },
    { value: "성동구", label: "서울 성동구" },
    { value: "광진구", label: "서울 광진구" },
    { value: "동대문구", label: "서울 동대문구" },
    { value: "중랑구", label: "서울 중랑구" },
    { value: "성북구", label: "서울 성북구" },
    { value: "강북구", label: "서울 강북구" },
    { value: "도봉구", label: "서울 도봉구" },
    { value: "노원구", label: "서울 노원구" },
    { value: "은평구", label: "서울 은평구" },
    { value: "서대문구", label: "서울 서대문구" },
    { value: "마포구", label: "서울 마포구" },
    { value: "양천구", label: "서울 양천구" },
    { value: "강서구", label: "서울 강서구" },
    { value: "구로구", label: "서울 구로구" },
    { value: "금천구", label: "서울 금천구" },
    { value: "영등포구", label: "서울 영등포구" },
    { value: "동작구", label: "서울 동작구" },
    { value: "관악구", label: "서울 관악구" },
    { value: "서초구", label: "서울 서초구" },
    { value: "강남구", label: "서울 강남구" },
    { value: "송파구", label: "서울 송파구" },
    { value: "강동구", label: "서울 강동구" },

    // 부산광역시
    { value: "부산", label: "부산" },
    { value: "해운대구", label: "부산 해운대구" },
    { value: "부산진구", label: "부산 부산진구" },
    { value: "동래구", label: "부산 동래구" },
    { value: "사하구", label: "부산 사하구" },
    { value: "금정구", label: "부산 금정구" },
    { value: "사상구", label: "부산 사상구" },

    // 인천광역시
    { value: "인천", label: "인천" },
    { value: "부평구", label: "인천 부평구" },
    { value: "계양구", label: "인천 계양구" },
    { value: "남동구", label: "인천 남동구" },

    // 대구광역시
    { value: "대구", label: "대구" },
    { value: "수성구", label: "대구 수성구" },
    { value: "달서구", label: "대구 달서구" },

    // 광주광역시
    { value: "광주", label: "광주" },
    { value: "광산구", label: "광주 광산구" },

    // 대전광역시
    { value: "대전", label: "대전" },
    { value: "유성구", label: "대전 유성구" },

    // 울산광역시
    { value: "울산", label: "울산" },

    // 세종특별자치시
    { value: "세종", label: "세종" },

    // 경기도 (주요 도시)
    { value: "수원", label: "수원" },
    { value: "성남", label: "성남" },
    { value: "고양", label: "고양" },
    { value: "용인", label: "용인" },
    { value: "부천", label: "부천" },
    { value: "안산", label: "안산" },
    { value: "안양", label: "안양" },
    { value: "남양주", label: "남양주" },
    { value: "화성", label: "화성" },
    { value: "평택", label: "평택" },
    { value: "의정부", label: "의정부" },
    { value: "시흥", label: "시흥" },
    { value: "파주", label: "파주" },
    { value: "김포", label: "김포" },
    { value: "광명", label: "광명" },

    // 강원도
    { value: "춘천", label: "춘천" },
    { value: "원주", label: "원주" },
    { value: "강릉", label: "강릉" },
    { value: "속초", label: "속초" },
    { value: "동해", label: "동해" },
    { value: "태백", label: "태백" },
    { value: "삼척", label: "삼척" },

    // 충청북도
    { value: "청주", label: "청주" },
    { value: "충주", label: "충주" },
    { value: "제천", label: "제천" },

    // 충청남도
    { value: "천안", label: "천안" },
    { value: "공주", label: "공주" },
    { value: "보령", label: "보령" },
    { value: "아산", label: "아산" },
    { value: "서산", label: "서산" },
    { value: "논산", label: "논산" },
    { value: "당진", label: "당진" },

    // 전라북도
    { value: "전주", label: "전주" },
    { value: "군산", label: "군산" },
    { value: "익산", label: "익산" },
    { value: "정읍", label: "정읍" },
    { value: "남원", label: "남원" },
    { value: "김제", label: "김제" },

    // 전라남도
    { value: "목포", label: "목포" },
    { value: "여수", label: "여수" },
    { value: "순천", label: "순천" },
    { value: "나주", label: "나주" },
    { value: "광양", label: "광양" },

    // 경상북도
    { value: "포항", label: "포항" },
    { value: "경주", label: "경주" },
    { value: "김천", label: "김천" },
    { value: "안동", label: "안동" },
    { value: "구미", label: "구미" },
    { value: "영주", label: "영주" },
    { value: "영천", label: "영천" },
    { value: "상주", label: "상주" },
    { value: "문경", label: "문경" },
    { value: "경산", label: "경산" },
    { value: "울릉도", label: "울릉도" },

    // 경상남도
    { value: "창원", label: "창원" },
    { value: "진주", label: "진주" },
    { value: "통영", label: "통영" },
    { value: "사천", label: "사천" },
    { value: "김해", label: "김해" },
    { value: "밀양", label: "밀양" },
    { value: "거제", label: "거제" },
    { value: "양산", label: "양산" },

    // 제주특별자치도
    { value: "제주", label: "제주" },
    { value: "서귀포", label: "서귀포" },
  ];

  // 날씨 정보 가져오기
  const fetchWeather = async () => {
    try {
      setLoading(true);
      setError(null);
      const data = await getWeather(selectedCity, "metric", "kr");
      setWeather(data);
      setLastUpdated(new Date());
    } catch (err: any) {
      console.error("날씨 조회 실패:", err);

      // 에러 메시지 추출
      let errorMessage = "날씨 정보를 가져오는 중 오류가 발생했습니다.";

      if (err.response?.status === 503) {
        errorMessage = "API 키가 설정되지 않았습니다. 관리자에게 문의하세요.";
      } else if (err.response?.status === 401) {
        errorMessage = "API 키가 유효하지 않습니다.";
      } else if (err.response?.status === 404) {
        errorMessage = `도시를 찾을 수 없습니다: ${city}`;
      } else if (err.response?.data?.message) {
        errorMessage = err.response.data.message;
      }

      setError(errorMessage);
    } finally {
      setLoading(false);
    }
  };

  // 초기 로딩 및 자동 새로고침
  useEffect(() => {
    fetchWeather();
    const interval = setInterval(fetchWeather, refreshInterval);
    return () => clearInterval(interval);
  }, [selectedCity, refreshInterval]);

  // 도시 변경 핸들러
  const handleCityChange = (newCity: string) => {
    setSelectedCity(newCity);
  };

  // 날씨 아이콘 선택
  const getWeatherIcon = (weatherMain: string) => {
    switch (weatherMain.toLowerCase()) {
      case "clear":
        return <Sun className="text-warning h-12 w-12" />;
      case "clouds":
        return <Cloud className="text-muted-foreground h-12 w-12" />;
      case "rain":
      case "drizzle":
        return <CloudRain className="text-primary h-12 w-12" />;
      case "snow":
        return <CloudSnow className="text-primary/70 h-12 w-12" />;
      default:
        return <Cloud className="text-muted-foreground h-12 w-12" />;
    }
  };

  // 로딩 상태
  if (loading && !weather) {
    return (
      <div className="bg-background flex h-full items-center justify-center rounded-lg border p-6">
        <div className="flex flex-col items-center gap-3">
          <RefreshCw className="text-primary h-8 w-8 animate-spin" />
          <div className="text-center">
            <p className="text-foreground mb-1 text-sm font-semibold">실제 기상청 API 연결 중...</p>
            <p className="text-muted-foreground text-xs">실시간 관측 데이터를 가져오고 있습니다</p>
          </div>
        </div>
      </div>
    );
  }

  // 에러 상태
  if (error || !weather) {
    const isTestMode = error?.includes("API 키가 설정되지 않았습니다");
    return (
      <div className="bg-background flex h-full flex-col items-center justify-center rounded-lg border p-6">
        <Cloud className="text-muted-foreground mb-2 h-12 w-12" />
        <div className="mb-3 text-center">
          <p className="text-foreground mb-1 text-sm font-semibold">{isTestMode ? "⚠️ 테스트 모드" : "❌ 연결 실패"}</p>
          <p className="text-foreground text-xs">{error || "날씨 정보를 불러올 수 없습니다."}</p>
          {isTestMode && <p className="text-warning mt-2 text-xs">임시 데이터가 표시됩니다</p>}
        </div>
        <Button variant="outline" size="sm" onClick={fetchWeather} className="gap-1">
          <RefreshCw className="h-3 w-3" />
          다시 시도
        </Button>
      </div>
    );
  }

  return (
    <div className="bg-background h-full rounded-lg border p-4">
      {/* 헤더 */}
      <div className="mb-3 flex items-center justify-between">
        <div className="flex-1">
          <h3 className="text-foreground mb-1 text-lg font-semibold">🌤️ {element?.customTitle || "날씨"}</h3>
          <div className="mb-1 flex items-center gap-2">
            <Popover open={open} onOpenChange={setOpen}>
              <PopoverTrigger asChild>
                <Button
                  variant="ghost"
                  role="combobox"
                  aria-expanded={open}
                  className="text-foreground hover:bg-muted/80 h-auto justify-between px-2 py-0.5 text-sm"
                >
                  {cities.find((city) => city.value === selectedCity)?.label || "도시 선택"}
                  <ChevronsUpDown className="ml-2 h-3.5 w-3.5 shrink-0 opacity-50" />
                </Button>
              </PopoverTrigger>
              <PopoverContent className="w-[200px] p-0" align="start">
                <Command>
                  <CommandInput placeholder="도시 검색..." />
                  <CommandList>
                    <CommandEmpty>도시를 찾을 수 없습니다.</CommandEmpty>
                    <CommandGroup>
                      {cities.map((city) => (
                        <CommandItem
                          key={city.value}
                          value={city.value}
                          onSelect={(currentValue) => {
                            handleCityChange(currentValue === selectedCity ? selectedCity : currentValue);
                            setOpen(false);
                          }}
                        >
                          <Check
                            className={cn("mr-2 h-4 w-4", selectedCity === city.value ? "opacity-100" : "opacity-0")}
                          />
                          {city.label}
                        </CommandItem>
                      ))}
                    </CommandGroup>
                  </CommandList>
                </Command>
              </PopoverContent>
            </Popover>
          </div>
          <p className="text-muted-foreground pl-2 text-xs">
            {lastUpdated
              ? `업데이트: ${lastUpdated.toLocaleTimeString("ko-KR", {
                  hour: "2-digit",
                  minute: "2-digit",
                })}`
              : ""}
          </p>
        </div>
        <Popover open={settingsOpen} onOpenChange={setSettingsOpen}>
          <PopoverTrigger asChild>
            <Button variant="ghost" size="sm" className="h-8 w-8 p-0">
              <Settings className="h-4 w-4" />
            </Button>
          </PopoverTrigger>
          <PopoverContent className="w-[200px] p-3" align="end">
            <div className="space-y-2">
              <h4 className="text-foreground mb-3 text-sm font-semibold">표시 항목</h4>
              {weatherItems.map((item) => {
                const Icon = item.icon;
                return (
                  <button
                    key={item.id}
                    onClick={() => toggleItem(item.id)}
                    className={cn(
                      "flex w-full items-center gap-2 rounded px-2 py-1.5 text-xs transition-colors",
                      selectedItems.includes(item.id) ? "bg-primary/10 text-primary" : "text-foreground hover:bg-muted",
                    )}
                  >
                    <Check
                      className={cn("h-3.5 w-3.5", selectedItems.includes(item.id) ? "opacity-100" : "opacity-0")}
                    />
                    <Icon className="h-3.5 w-3.5" />
                    <span>{item.label}</span>
                  </button>
                );
              })}
            </div>
          </PopoverContent>
        </Popover>
        <Button variant="ghost" size="sm" onClick={fetchWeather} disabled={loading} className="h-8 w-8 p-0">
          <RefreshCw className={`h-4 w-4 ${loading ? "animate-spin" : ""}`} />
        </Button>
      </div>

      {/* 반응형 그리드 레이아웃 - 자동 조정 */}
      <div className="grid gap-2" style={{ gridTemplateColumns: "repeat(auto-fit, minmax(150px, 1fr))" }}>
        {/* 날씨 아이콘 및 온도 */}
        <div className="bg-muted/80 rounded-lg p-3">
          <div className="flex items-center gap-1.5">
            <div className="flex-shrink-0">
              {(() => {
                const iconClass = "h-5 w-5";
                switch (weather.weatherMain.toLowerCase()) {
                  case "clear":
                    return <Sun className={`${iconClass} text-warning`} />;
                  case "clouds":
                    return <Cloud className={`${iconClass} text-muted-foreground`} />;
                  case "rain":
                  case "drizzle":
                    return <CloudRain className={`${iconClass} text-primary`} />;
                  case "snow":
                    return <CloudSnow className={`${iconClass} text-primary/70`} />;
                  default:
                    return <Cloud className={`${iconClass} text-muted-foreground`} />;
                }
              })()}
            </div>
            <div className="min-w-0 flex-1">
              <div className="text-foreground truncate text-sm leading-tight font-bold">{weather.temperature}°C</div>
              <p className="text-muted-foreground truncate text-xs leading-tight capitalize">
                {weather.weatherDescription}
              </p>
            </div>
          </div>
        </div>

        {/* 기온 - 선택 가능 */}
        {selectedItems.includes("temperature") && (
          <div className="bg-muted/80 flex items-center gap-1.5 rounded-lg p-3">
            <Sun className="text-warning h-3.5 w-3.5 flex-shrink-0" />
            <div className="min-w-0 flex-1">
              <p className="text-muted-foreground truncate text-xs leading-tight">기온</p>
              <p className="text-foreground truncate text-sm leading-tight font-semibold">{weather.temperature}°C</p>
            </div>
          </div>
        )}

        {/* 체감 온도 */}
        {selectedItems.includes("feelsLike") && (
          <div className="bg-muted/80 flex items-center gap-1.5 rounded-lg p-3">
            <Wind className="text-primary h-3.5 w-3.5 flex-shrink-0" />
            <div className="min-w-0 flex-1">
              <p className="text-muted-foreground truncate text-xs leading-tight">체감온도</p>
              <p className="text-foreground truncate text-sm leading-tight font-semibold">{weather.feelsLike}°C</p>
            </div>
          </div>
        )}

        {/* 습도 */}
        {selectedItems.includes("humidity") && (
          <div className="bg-muted/80 flex items-center gap-1.5 rounded-lg p-3">
            <Droplets className="text-primary h-3.5 w-3.5 flex-shrink-0" />
            <div className="min-w-0 flex-1">
              <p className="text-muted-foreground truncate text-xs leading-tight">습도</p>
              <p className="text-foreground truncate text-sm leading-tight font-semibold">{weather.humidity}%</p>
            </div>
          </div>
        )}

        {/* 풍속 */}
        {selectedItems.includes("windSpeed") && (
          <div className="bg-muted/80 flex items-center gap-1.5 rounded-lg p-3">
            <Wind className="text-success h-3.5 w-3.5 flex-shrink-0" />
            <div className="min-w-0 flex-1">
              <p className="text-muted-foreground truncate text-xs leading-tight">풍속</p>
              <p className="text-foreground truncate text-sm leading-tight font-semibold">{weather.windSpeed} m/s</p>
            </div>
          </div>
        )}

        {/* 기압 */}
        {selectedItems.includes("pressure") && (
          <div className="bg-muted/80 flex items-center gap-1.5 rounded-lg p-3">
            <Gauge className="text-primary h-3.5 w-3.5 flex-shrink-0" />
            <div className="min-w-0 flex-1">
              <p className="text-muted-foreground truncate text-xs leading-tight">기압</p>
              <p className="text-foreground truncate text-sm leading-tight font-semibold">{weather.pressure} hPa</p>
            </div>
          </div>
        )}
      </div>
    </div>
  );
}