import React, { useState } from 'react';
import { Save, Key, Shield, MessageCircle, Globe, Check, Cpu, Zap, Plus, Trash2, Edit3, X, BarChart4, Newspaper, Scale, PlusCircle, MinusCircle } from 'lucide-react';
import { ApiSettings, AiConfig } from '../types';
import { InputGroup, ToggleButton, SelectGroup } from '../components/CommonUI';

interface SettingsProps {
  settings: ApiSettings;
  onSave: (settings: ApiSettings) => void;
}

const Settings: React.FC<SettingsProps> = ({ settings, onSave }) => {
  const [formData, setFormData] = useState<ApiSettings>(settings);
  const [isSaved, setIsSaved] = useState(false);
  const [showAiModal, setShowAiModal] = useState(false);
  const [editingAi, setEditingAi] = useState<Partial<AiConfig> | null>(null);

  const handleSubmit = (e: React.FormEvent) => {
    e.preventDefault();
    onSave(formData);
    setIsSaved(true);
    setTimeout(() => setIsSaved(false), 3000);
  };

  const toggleService = (field: keyof Pick<ApiSettings, 'useTelegram' | 'useNaverNews'>) => {
    setFormData(prev => ({ ...prev, [field]: !prev[field] }));
  };

  const handleAddAi = () => {
    setEditingAi({
      id: 'ai_' + Date.now(),
      name: '',
      providerType: 'gemini',
      modelName: 'gemini-3-flash-preview',
      baseUrl: ''
    });
    setShowAiModal(true);
  };

  const handleSaveAi = () => {
    if (!editingAi?.name) return;
    const newConfigs = [...formData.aiConfigs];
    const index = newConfigs.findIndex(c => c.id === editingAi.id);
    if (index > -1) {
      newConfigs[index] = editingAi as AiConfig;
    } else {
      newConfigs.push(editingAi as AiConfig);
    }
    setFormData({ ...formData, aiConfigs: newConfigs });
    setShowAiModal(false);
    setEditingAi(null);
  };

  const handleDeleteAi = (id: string) => {
    setFormData({ ...formData, aiConfigs: formData.aiConfigs.filter(c => c.id !== id) });
  };

  return (
    <div className="w-full space-y-6 animate-in fade-in duration-500 pb-20">
      <form onSubmit={handleSubmit} className="space-y-6">
        <div className="grid grid-cols-1 lg:grid-cols-2 gap-6 items-start">
          {/* Left Column: API & AI */}
          <div className="space-y-6">
            {/* KIS API Section Card */}
            <section className="bg-white p-6 rounded-2xl shadow-sm border border-slate-100">
              <div className="flex items-center gap-3 mb-6">
                <div className="p-2 bg-blue-600 text-white rounded-xl shadow-lg shadow-blue-50">
                  <Key size={20} />
                </div>
                <div>
                  <h4 className="text-[14px] font-black text-slate-800 uppercase tracking-tight">KIS API 커넥터 설정</h4>
                  <p className="text-[11px] text-slate-400 font-bold uppercase tracking-widest mt-0.5">안전한 증권사 연동 프로필</p>
                </div>
              </div>
              <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
                <InputGroup label="앱 키" value={formData.appKey} onChange={(v) => setFormData({...formData, appKey: v})} type="password" placeholder="App Key" />
                <InputGroup label="비밀 키" value={formData.appSecret} onChange={(v) => setFormData({...formData, appSecret: v})} type="password" placeholder="Secret Key" />
                <div className="md:col-span-2">
                  <InputGroup label="계좌 번호" value={formData.accountNumber} onChange={(v) => setFormData({...formData, accountNumber: v})} placeholder="예: 50061234-01" />
                </div>
              </div>
            </section>

            {/* AI 분석 자동화 설정 Card */}
            <section className="bg-white p-6 rounded-2xl shadow-sm border border-slate-100">
              <div className="flex items-center gap-3 mb-6">
                <div className="p-2 bg-blue-600 text-white rounded-xl shadow-lg shadow-blue-50">
                  <Zap size={20} />
                </div>
                <div>
                  <h4 className="text-[13px] font-black text-slate-800 uppercase tracking-tight">AI 분석 자동화 설정</h4>
                  <p className="text-[11px] text-slate-400 font-bold uppercase tracking-widest mt-0.5">분석 작업별 엔진 지정</p>
                </div>
              </div>

              <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
                <SelectGroup 
                  label="뉴스 분석 Engine" 
                  icon={<Newspaper size={14} className="text-blue-500" />}
                  value={formData.preferredNewsAiId || ''}
                  onChange={(v) => setFormData({...formData, preferredNewsAiId: v})}
                  options={[{value: '', label: '선택 안 함'}, ...formData.aiConfigs.map(c => ({value: c.id, label: c.name}))]}
                />

                <SelectGroup 
                  label="종목 분석 Engine" 
                  icon={<BarChart4 size={14} className="text-purple-500" />}
                  value={formData.preferredStockAiId || ''}
                  onChange={(v) => setFormData({...formData, preferredStockAiId: v})}
                  options={[{value: '', label: '선택 안 함'}, ...formData.aiConfigs.map(c => ({value: c.id, label: c.name}))]}
                />

                <SelectGroup 
                  label="뉴스 판단 Engine" 
                  icon={<Scale size={14} className="text-amber-500" />}
                  value={formData.preferredNewsJudgementAiId || ''}
                  onChange={(v) => setFormData({...formData, preferredNewsJudgementAiId: v})}
                  options={[{value: '', label: '선택 안 함'}, ...formData.aiConfigs.map(c => ({value: c.id, label: c.name}))]}
                />

                <SelectGroup 
                  label="자동매수 Engine" 
                  icon={<PlusCircle size={14} className="text-rose-500" />}
                  value={formData.preferredAutoBuyAiId || ''}
                  onChange={(v) => setFormData({...formData, preferredAutoBuyAiId: v})}
                  options={[{value: '', label: '선택 안 함'}, ...formData.aiConfigs.map(c => ({value: c.id, label: c.name}))]}
                />

                <div className="md:col-span-2">
                  <SelectGroup 
                    label="자동매도 Engine" 
                    icon={<MinusCircle size={14} className="text-blue-600" />}
                    value={formData.preferredAutoSellAiId || ''}
                    onChange={(v) => setFormData({...formData, preferredAutoSellAiId: v})}
                    options={[{value: '', label: '선택 안 함'}, ...formData.aiConfigs.map(c => ({value: c.id, label: c.name}))]}
                  />
                </div>
              </div>
            </section>
          </div>

          {/* Right Column: Extensions & Notifications & AI Management */}
          <div className="space-y-6">
            {/* AI Engine Management Card moved here */}
            <section className="bg-white p-6 rounded-2xl shadow-sm border border-slate-100">
              <div className="flex items-center justify-between mb-8">
                <div className="flex items-center gap-3">
                  <div className="p-2 bg-slate-900 text-white rounded-xl shadow-lg shadow-slate-100">
                    <Cpu size={20} />
                  </div>
                  <div>
                    <h4 className="text-[14px] font-black text-slate-800 uppercase tracking-tight">AI 엔진 프로필 관리</h4>
                    <p className="text-[11px] text-slate-400 font-bold uppercase tracking-widest mt-0.5">사용자 지정 AI 모델 목록</p>
                  </div>
                </div>
                <button 
                  type="button" 
                  onClick={() => { setEditingAi({ id: Date.now().toString(), name: '', providerType: 'gemini', modelName: '' }); setShowAiModal(true); }}
                  className="p-2 bg-slate-50 text-slate-600 rounded-xl hover:bg-blue-50 hover:text-blue-600 transition-colors border border-slate-100"
                >
                  <Plus size={20} />
                </button>
              </div>

              <div className="space-y-3">
                {formData.aiConfigs.length === 0 ? (
                  <div className="text-center py-8 bg-slate-50/50 rounded-xl border border-dashed border-slate-200">
                    <p className="text-[11px] font-black text-slate-300 uppercase tracking-widest">등록된 엔진이 없습니다</p>
                  </div>
                ) : (
                  formData.aiConfigs.map(config => (
                    <div key={config.id} className="flex items-center gap-4 p-4 bg-slate-50/50 rounded-xl border border-slate-100 group">
                      <div className={`p-2 rounded-lg ${config.providerType === 'gemini' ? 'bg-blue-100 text-blue-600' : 'bg-emerald-100 text-emerald-600'}`}>
                        <Cpu size={16} />
                      </div>
                      <div className="flex-1 min-w-0">
                        <h5 className="text-[13px] font-black text-slate-800 truncate">{config.name}</h5>
                        <p className="text-[10px] text-slate-400 font-bold uppercase tracking-widest mt-0.5">
                          {config.providerType === 'gemini' ? 'Gemini Flash' : 'Ollama (OpenAI)'} • {config.modelName}
                        </p>
                      </div>
                      <div className="flex items-center gap-1 opacity-0 group-hover:opacity-100 transition-opacity">
                        <button type="button" onClick={() => { setEditingAi(config); setShowAiModal(true); }} className="p-2 text-slate-400 hover:text-blue-600 transition-colors"><Edit3 size={16} /></button>
                        <button type="button" onClick={() => handleDeleteAi(config.id)} className="p-2 text-slate-400 hover:text-rose-500 transition-colors"><Trash2 size={16} /></button>
                      </div>
                    </div>
                  ))
                )}
              </div>
            </section>

            <section className="bg-white p-6 rounded-2xl shadow-sm border border-slate-100">
              <div className="flex items-center justify-between mb-6">
                <div className="flex items-center gap-3">
                  <div className={`p-2 rounded-xl shadow-lg ${formData.useTelegram ? 'bg-blue-100 text-blue-600 shadow-blue-50' : 'bg-slate-200 text-slate-400 shadow-slate-50'}`}>
                    <MessageCircle size={20} />
                  </div>
                  <div>
                    <h4 className="text-[13px] font-black text-slate-800 uppercase tracking-tight">텔레그램 알림 봇 연동</h4>
                    <p className="text-[11px] text-slate-400 font-bold uppercase tracking-widest mt-0.5">체결 알림 및 상태 보고</p>
                  </div>
                </div>
                <ToggleButton active={formData.useTelegram} onClick={() => toggleService('useTelegram')} />
              </div>
              
              <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
                <InputGroup label="봇 토큰" value={formData.telegramToken} onChange={(v) => setFormData({...formData, telegramToken: v})} placeholder="Bot API Token" />
                <InputGroup label="채팅 ID" value={formData.telegramChatId} onChange={(v) => setFormData({...formData, telegramChatId: v})} placeholder="Chat ID" />
              </div>
            </section>

            <section className="bg-white p-6 rounded-2xl shadow-sm border border-slate-100">
              <div className="flex items-center justify-between mb-6">
                <div className="flex items-center gap-3">
                  <div className={`p-2 rounded-xl shadow-lg ${formData.useNaverNews ? 'bg-emerald-100 text-emerald-600 shadow-emerald-50' : 'bg-slate-200 text-slate-400 shadow-slate-50'}`}>
                    <Globe size={20} />
                  </div>
                  <div>
                    <h4 className="text-[13px] font-black text-slate-800 uppercase tracking-tight">네이버 뉴스 스크랩 연동</h4>
                    <p className="text-[11px] text-slate-400 font-bold uppercase tracking-widest mt-0.5">실시간 금융 뉴스 분석</p>
                  </div>
                </div>
                <ToggleButton active={formData.useNaverNews} onClick={() => toggleService('useNaverNews')} />
              </div>
              
              <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
                <InputGroup label="Client ID" value={formData.naverClientId} onChange={(v) => setFormData({...formData, naverClientId: v})} placeholder="Naver Client ID" />
                <InputGroup label="Client Secret" value={formData.naverClientSecret} onChange={(v) => setFormData({...formData, naverClientSecret: v})} type="password" placeholder="Naver Client Secret" />
              </div>
            </section>

            <div className="p-5 bg-slate-50/50 rounded-xl border border-slate-100 border-dashed text-center">
              <p className="text-[11px] font-black text-slate-400 uppercase tracking-widest">추가 확장 기능 준비 중</p>
            </div>
          </div>
        </div>

        {/* Save Bar */}
        <div className="bg-white p-6 rounded-2xl shadow-sm border border-slate-100 flex flex-col sm:flex-row items-center justify-between gap-6">
          <div className="flex items-center gap-3 text-slate-400 text-[12px] font-medium bg-slate-50 px-4 py-3 rounded-xl border border-slate-100">
             <Shield size={18} className="text-emerald-500" />
             로컬 보안 격리 저장 활성화됨
          </div>
          <button 
            type="submit"
            className={`w-full sm:w-auto px-12 py-3.5 rounded-xl font-black uppercase text-[14px] tracking-widest shadow-xl transition-all flex items-center justify-center gap-2 ${isSaved ? 'bg-emerald-500 text-white shadow-emerald-100 scale-95' : 'bg-slate-900 text-white hover:bg-slate-800 shadow-slate-100 active:scale-95'}`}
          >
            {isSaved ? <><Check size={18} /> 저장됨</> : <><Save size={18} /> 설정 저장</>}
          </button>
        </div>
      </form>

      {/* AI Engine Modal */}
      {showAiModal && (
        <div className="fixed inset-0 z-[150] bg-slate-900/40 backdrop-blur-sm flex items-center justify-center p-6">
          <div className="bg-white w-full max-w-sm rounded-2xl p-6 shadow-2xl animate-in zoom-in-95 duration-200 border border-slate-100">
            <div className="flex justify-between items-center mb-8">
              <h3 className="text-[18px] font-black text-slate-900 flex items-center gap-2 uppercase tracking-tight">
                <Cpu size={20} className="text-blue-600" /> AI 엔진 프로필
              </h3>
              <button onClick={() => setShowAiModal(false)} className="p-1 hover:bg-slate-100 rounded-full transition-colors"><X size={24} className="text-slate-400" /></button>
            </div>
            
            <div className="space-y-5">
              <InputGroup label="엔진 식별 이름" value={editingAi?.name || ''} onChange={(v) => setEditingAi({...editingAi, name: v})} placeholder="예: 구글 고성능 모델" />
              <div className="space-y-2">
                <label className="text-[10px] font-black text-slate-400 uppercase tracking-widest ml-1">프로바이더</label>
                <div className="flex bg-slate-100 p-1 rounded-xl">
                  <button type="button" onClick={() => setEditingAi({...editingAi, providerType: 'gemini'})} className={`flex-1 py-2 rounded-lg text-[10px] font-black transition-all ${editingAi?.providerType === 'gemini' ? 'bg-white text-blue-600 shadow-sm' : 'text-slate-400'}`}>Gemini Flash</button>
                  <button type="button" onClick={() => setEditingAi({...editingAi, providerType: 'openai-compatible'})} className={`flex-1 py-2 rounded-lg text-[10px] font-black transition-all ${editingAi?.providerType === 'openai-compatible' ? 'bg-white text-blue-600 shadow-sm' : 'text-slate-400'}`}>Ollama (OpenAI)</button>
                </div>
              </div>
              <InputGroup label="모델명" value={editingAi?.modelName || ''} onChange={(v) => setEditingAi({...editingAi, modelName: v})} placeholder="gemini-pros" />
              <button 
                type="button"
                onClick={handleSaveAi}
                className="w-full py-3 bg-blue-600 text-white rounded-xl font-black uppercase text-[12px] tracking-widest hover:bg-blue-700 transition-all shadow-lg shadow-blue-50 mt-4"
              >
                저장하기
              </button>
            </div>
          </div>
        </div>
      )}
    </div>
  );
};

export default Settings;