/**
 * X 봇 추가/수정 다이얼로그
 */
import { useState, useEffect, useRef } from 'react';
import { createPortal } from 'react-dom';
import { useQuery, useQueryClient } from '@tanstack/react-query';
import { motion, AnimatePresence } from 'framer-motion';
import { Twitter, Search, X, ChevronDown, ChevronUp, Loader2 } from 'lucide-react';
import { getXBot, createXBot, updateXBot, lookupXProfile } from '@/api/admin/bots';

// 동기화 간격 옵션
const INTERVAL_OPTIONS = [
  { value: 1, label: '1분' },
  { value: 2, label: '2분' },
  { value: 5, label: '5분' },
  { value: 10, label: '10분' },
  { value: 30, label: '30분' },
  { value: 60, label: '1시간' },
];

/**
 * 커스텀 드롭다운 컴포넌트 (Portal 사용)
 */
function Dropdown({ value, options, onChange, placeholder = '선택', className = '' }) {
  const [isOpen, setIsOpen] = useState(false);
  const [position, setPosition] = useState({ top: 0, left: 0, width: 0 });
  const buttonRef = useRef(null);
  const menuRef = useRef(null);

  useEffect(() => {
    const handleClickOutside = (event) => {
      if (
        buttonRef.current &&
        !buttonRef.current.contains(event.target) &&
        menuRef.current &&
        !menuRef.current.contains(event.target)
      ) {
        setIsOpen(false);
      }
    };

    if (isOpen) {
      document.addEventListener('mousedown', handleClickOutside);
    }
    return () => document.removeEventListener('mousedown', handleClickOutside);
  }, [isOpen]);

  useEffect(() => {
    if (isOpen && buttonRef.current) {
      const rect = buttonRef.current.getBoundingClientRect();
      setPosition({
        top: rect.bottom + 4,
        left: rect.left,
        width: rect.width,
      });
    }
  }, [isOpen]);

  const selectedOption = options.find((opt) => opt.value === value);

  return (
    <div className={`relative ${className}`}>
      <button
        ref={buttonRef}
        type="button"
        onClick={() => setIsOpen(!isOpen)}
        className="flex items-center gap-2 w-full px-4 py-2.5 bg-gray-100 hover:bg-gray-200 rounded-lg text-sm transition-colors justify-between"
      >
        <span className={selectedOption ? 'text-gray-900' : 'text-gray-400'}>
          {selectedOption?.label || placeholder}
        </span>
        <ChevronDown
          size={14}
          className={`text-gray-400 transition-transform ${isOpen ? 'rotate-180' : ''}`}
        />
      </button>
      {createPortal(
        <AnimatePresence>
          {isOpen && (
            <motion.div
              ref={menuRef}
              initial={{ opacity: 0, y: -10 }}
              animate={{ opacity: 1, y: 0 }}
              exit={{ opacity: 0, y: -10 }}
              transition={{ duration: 0.15 }}
              style={{
                position: 'fixed',
                top: position.top,
                left: position.left,
                width: position.width,
                zIndex: 9999,
              }}
              className="bg-white rounded-xl shadow-lg border border-gray-200 py-1 max-h-60 overflow-y-auto"
            >
              {options.map((opt) => (
                <button
                  key={opt.value}
                  type="button"
                  onClick={() => {
                    onChange(opt.value);
                    setIsOpen(false);
                  }}
                  className={`w-full px-4 py-2 text-left hover:bg-gray-50 transition-colors text-sm ${
                    value === opt.value ? 'bg-sky-50 text-sky-600' : ''
                  }`}
                >
                  {opt.label}
                </button>
              ))}
            </motion.div>
          )}
        </AnimatePresence>,
        document.body
      )}
    </div>
  );
}

function XBotDialog({ isOpen, onClose, botId = null, onSuccess }) {
  const queryClient = useQueryClient();
  const isEdit = !!botId;

  // 폼 상태
  const [username, setUsername] = useState('');
  const [profileInfo, setProfileInfo] = useState(null);
  const [lookupLoading, setLookupLoading] = useState(false);
  const [interval, setInterval] = useState(1);
  const [submitting, setSubmitting] = useState(false);

  // 고급 설정
  const [showAdvanced, setShowAdvanced] = useState(false);
  const [textFilters, setTextFilters] = useState([]);
  const [filterInput, setFilterInput] = useState('');

  // X 봇 상세 조회 (수정 모드)
  const { data: bot, isLoading: botLoading } = useQuery({
    queryKey: ['admin', 'x-bot', botId],
    queryFn: () => getXBot(botId),
    enabled: isOpen && !!botId,
    staleTime: 0,
  });

  // 다이얼로그 열릴 때 데이터 설정
  useEffect(() => {
    if (!isOpen) return;

    if (bot) {
      // 수정 모드
      setUsername(bot.username || '');
      setProfileInfo({
        username: bot.username,
        displayName: bot.display_name,
        avatarUrl: bot.avatar_url,
      });
      setInterval(bot.cron_interval || 1);
      setTextFilters(bot.text_filters || []);
      setShowAdvanced((bot.text_filters && bot.text_filters.length > 0) || false);
    } else if (!botId) {
      // 추가 모드
      setUsername('');
      setProfileInfo(null);
      setInterval(1);
      setTextFilters([]);
      setFilterInput('');
      setShowAdvanced(false);
    }
  }, [isOpen, bot, botId]);

  // 프로필 조회
  const handleLookup = async () => {
    if (!username.trim()) return;
    setLookupLoading(true);
    try {
      const data = await lookupXProfile(username);
      setProfileInfo({
        username: data.username,
        displayName: data.displayName,
        avatarUrl: data.avatarUrl,
      });
    } catch (error) {
      console.error('프로필 조회 실패:', error);
      alert(error.message || '프로필을 찾을 수 없습니다.');
    } finally {
      setLookupLoading(false);
    }
  };

  // 제출
  const handleSubmit = async (e) => {
    e.preventDefault();
    if (!profileInfo) return;

    setSubmitting(true);
    try {
      const data = {
        username: profileInfo.username,
        display_name: profileInfo.displayName,
        avatar_url: profileInfo.avatarUrl,
        text_filters: textFilters.length > 0 ? textFilters : null,
        cron_interval: interval,
      };

      if (isEdit) {
        await updateXBot(botId, data);
      } else {
        await createXBot(data);
      }

      // 캐시 무효화
      queryClient.invalidateQueries({ queryKey: ['admin', 'bots'] });
      queryClient.invalidateQueries({ queryKey: ['admin', 'x-bot'] });

      onSuccess?.();
      onClose();
    } catch (error) {
      console.error('봇 저장 실패:', error);
      alert(error.message || '봇 저장에 실패했습니다.');
    } finally {
      setSubmitting(false);
    }
  };

  return createPortal(
    <AnimatePresence>
      {isOpen && (
        <motion.div
          initial={{ opacity: 0 }}
          animate={{ opacity: 1 }}
          exit={{ opacity: 0 }}
          className="fixed inset-0 z-50 flex items-center justify-center bg-black/50"
        >
          <motion.div
            initial={{ scale: 0.95, opacity: 0 }}
            animate={{ scale: 1, opacity: 1 }}
            exit={{ scale: 0.95, opacity: 0 }}
            className="bg-white rounded-2xl w-full max-w-lg mx-4 shadow-xl max-h-[90vh] overflow-hidden flex flex-col"
            onClick={(e) => e.stopPropagation()}
          >
            {/* 헤더 */}
            <div className="flex items-center justify-between px-6 py-4 border-b border-gray-100">
              <div className="flex items-center gap-3">
                <div className="w-10 h-10 rounded-lg bg-sky-50 flex items-center justify-center">
                  <Twitter size={20} className="text-sky-500" />
                </div>
                <h2 className="text-lg font-bold text-gray-900">
                  {isEdit ? 'X 봇 수정' : 'X 봇 추가'}
                </h2>
              </div>
              <button
                onClick={onClose}
                className="p-2 text-gray-400 hover:text-gray-600 hover:bg-gray-100 rounded-lg transition-colors"
              >
                <X size={20} />
              </button>
            </div>

            {/* 본문 */}
            {botLoading ? (
              <div className="flex-1 flex items-center justify-center p-12">
                <Loader2 size={32} className="animate-spin text-sky-500" />
              </div>
            ) : (
              <form onSubmit={handleSubmit} className="flex-1 overflow-y-auto p-6 space-y-5">
                {/* Username */}
                <div>
                  <label className="block text-sm font-medium text-gray-700 mb-1.5">
                    Username
                  </label>
                  <div className="flex gap-2">
                    <div className="flex-1 relative">
                      <span className="absolute left-3 top-1/2 -translate-y-1/2 text-gray-400">@</span>
                      <input
                        type="text"
                        value={username}
                        onChange={(e) => setUsername(e.target.value)}
                        placeholder="realfromis_9"
                        disabled={isEdit}
                        className="w-full pl-8 pr-4 py-2.5 border border-gray-200 rounded-lg focus:outline-none focus:ring-2 focus:ring-sky-500/20 focus:border-sky-500 disabled:bg-gray-50 disabled:text-gray-500"
                      />
                    </div>
                    {!isEdit && (
                      <button
                        type="button"
                        onClick={handleLookup}
                        disabled={lookupLoading || !username.trim()}
                        className="px-4 py-2.5 bg-gray-100 text-gray-700 rounded-lg hover:bg-gray-200 transition-colors disabled:opacity-50 flex items-center gap-2"
                      >
                        {lookupLoading ? (
                          <span className="w-4 h-4 border-2 border-gray-400/30 border-t-gray-400 rounded-full animate-spin" />
                        ) : (
                          <Search size={18} />
                        )}
                        조회
                      </button>
                    )}
                  </div>
                  {/* 프로필 정보 표시 */}
                  {profileInfo && (
                    <div className="mt-3 p-4 bg-gray-50 rounded-lg flex items-center gap-4">
                      {profileInfo.avatarUrl ? (
                        <img
                          src={profileInfo.avatarUrl}
                          alt={profileInfo.displayName}
                          className="w-12 h-12 rounded-full object-cover"
                        />
                      ) : (
                        <div className="w-12 h-12 bg-sky-100 rounded-full flex items-center justify-center">
                          <Twitter size={24} className="text-sky-500" />
                        </div>
                      )}
                      <div className="flex-1 min-w-0">
                        <p className="font-medium text-gray-900 truncate">
                          {profileInfo.displayName}
                        </p>
                        <p className="text-sm text-gray-500">@{profileInfo.username}</p>
                      </div>
                    </div>
                  )}
                </div>

                {/* 동기화 간격 */}
                <div>
                  <label className="block text-sm font-medium text-gray-700 mb-1.5">
                    동기화 간격
                  </label>
                  <Dropdown
                    value={interval}
                    options={INTERVAL_OPTIONS}
                    onChange={setInterval}
                    placeholder="간격 선택"
                  />
                </div>

                {/* 고급 설정 */}
                <div className="border border-gray-200 rounded-lg overflow-hidden">
                  <button
                    type="button"
                    className="w-full flex items-center justify-between p-4 hover:bg-gray-50 transition-colors"
                    onClick={() => setShowAdvanced(!showAdvanced)}
                  >
                    <span className="font-medium text-gray-700">고급 설정</span>
                    {showAdvanced ? (
                      <ChevronUp size={20} className="text-gray-400" />
                    ) : (
                      <ChevronDown size={20} className="text-gray-400" />
                    )}
                  </button>

                  {showAdvanced && (
                    <div className="p-4 pt-0 space-y-4 border-t border-gray-100">
                      {/* 텍스트 필터 */}
                      <div>
                        <label className="block text-sm text-gray-600 mb-1">텍스트 필터</label>
                        <div className="flex flex-wrap gap-2 p-2 border border-gray-200 rounded-lg min-h-[42px]">
                          {textFilters.map((filter, idx) => (
                            <span
                              key={idx}
                              className="inline-flex items-center gap-1 px-2 py-1 bg-sky-50 text-sky-600 rounded-md text-sm"
                            >
                              {filter}
                              <button
                                type="button"
                                onClick={() => setTextFilters(textFilters.filter((_, i) => i !== idx))}
                                className="hover:text-sky-800"
                              >
                                <X size={14} />
                              </button>
                            </span>
                          ))}
                          <input
                            type="text"
                            value={filterInput}
                            onChange={(e) => setFilterInput(e.target.value)}
                            onKeyDown={(e) => {
                              if (e.key === 'Enter' && filterInput.trim()) {
                                e.preventDefault();
                                if (!textFilters.includes(filterInput.trim())) {
                                  setTextFilters([...textFilters, filterInput.trim()]);
                                }
                                setFilterInput('');
                              }
                            }}
                            placeholder={textFilters.length === 0 ? '키워드 입력 후 Enter' : ''}
                            className="flex-1 min-w-[120px] outline-none text-sm"
                          />
                        </div>
                        <p className="text-xs text-gray-400 mt-1">
                          키워드 중 하나라도 포함된 트윗만 추가됩니다 (비어있으면 모든 트윗)
                        </p>
                      </div>
                    </div>
                  )}
                </div>
              </form>
            )}

            {/* 푸터 */}
            <div className="flex justify-end gap-3 px-6 py-4 border-t border-gray-100 bg-gray-50">
              <button
                type="button"
                onClick={onClose}
                disabled={submitting}
                className="px-4 py-2.5 text-gray-600 hover:text-gray-900 hover:bg-gray-200 rounded-lg transition-colors disabled:opacity-50"
              >
                취소
              </button>
              <button
                type="submit"
                onClick={handleSubmit}
                disabled={!profileInfo || submitting || botLoading}
                className="px-4 py-2.5 bg-sky-500 text-white rounded-lg hover:bg-sky-600 transition-colors disabled:opacity-50 disabled:cursor-not-allowed flex items-center gap-2"
              >
                {submitting && <Loader2 size={16} className="animate-spin" />}
                {isEdit ? '수정' : '추가'}
              </button>
            </div>
          </motion.div>
        </motion.div>
      )}
    </AnimatePresence>,
    document.body
  );
}

export default XBotDialog;