import React, { useState, useEffect, useMemo } from 'react';
import { 
  X, TrendingUp, BarChart4, PieChart, Info, Building2, Layers, RotateCw 
} from 'lucide-react';
import { StockItem, MarketType, StockTick } from '../types';
import { DbService } from '../services/dbService';

interface StockDetailModalProps {
  stock: StockItem;
  onClose: () => void;
}

const StockDetailModal: React.FC<StockDetailModalProps> = ({ stock, onClose }) => {
  const [ticks, setTicks] = useState<StockTick[]>([]);
  const dbService = useMemo(() => new DbService(), []);

  useEffect(() => {
    const refreshTicks = async () => {
      const history = await dbService.getStockTicks(stock.code);
      setTicks(history);
    };

    refreshTicks();
    const interval = setInterval(refreshTicks, 5000);
    return () => clearInterval(interval);
  }, [stock.code, dbService]);

  return (
    <div className="fixed inset-0 z-[300] bg-slate-900/40 backdrop-blur-xl flex items-center justify-center p-6 animate-in fade-in duration-300">
      <div className="bg-white w-full max-w-7xl rounded-[4rem] h-[85vh] shadow-2xl flex flex-col overflow-hidden border border-slate-100 animate-in slide-in-from-bottom-10">
        {/* Header */}
        <div className="px-16 py-10 flex justify-between items-center border-b border-slate-50">
          <div className="flex items-center gap-8">
            <div className="w-20 h-20 bg-slate-900 rounded-[2rem] flex items-center justify-center text-white shadow-xl">
              <BarChart4 size={40} />
            </div>
            <div>
              <div className="flex items-center gap-4 mb-2">
                <h2 className="text-4xl font-black text-slate-900 tracking-tighter italic">{stock.name}</h2>
                <span className={`px-4 py-1 rounded-full text-[10px] font-black uppercase tracking-[0.2em] ${stock.market === MarketType.DOMESTIC ? 'bg-red-50 text-red-500' : 'bg-blue-50 text-blue-600'}`}>
                  {stock.market}
                </span>
              </div>
              <p className="text-base text-slate-400 font-mono font-bold tracking-[0.3em] uppercase">{stock.code}</p>
            </div>
          </div>
          <div className="flex items-center gap-8">
            <div className="text-right">
              <p className="text-5xl font-black text-slate-900 tracking-tighter mb-2">
                {stock.market === MarketType.DOMESTIC ? stock.price.toLocaleString() : `$${stock.price}`}
              </p>
              <p className={`text-xl font-bold ${stock.changePercent >= 0 ? 'text-rose-500' : 'text-blue-600'} flex items-center justify-end gap-2`}>
                {stock.changePercent >= 0 ? <TrendingUp size={24}/> : <TrendingUp size={24} className="rotate-180" />}
                {Math.abs(stock.changePercent)}%
              </p>
            </div>
            <button onClick={onClose} className="p-4 bg-slate-50 hover:bg-slate-100 text-slate-400 rounded-full transition-all">
              <X size={32} />
            </button>
          </div>
        </div>

        {/* Body */}
        <div className="flex-1 flex overflow-hidden">
          {/* Left: Chart */}
          <div className="flex-[1.5] p-16 border-r border-slate-50 overflow-hidden flex flex-col">
            <div className="flex items-center justify-between mb-10">
              <h4 className="text-[12px] font-black text-slate-400 uppercase tracking-[0.3em] flex items-center gap-3">
                <PieChart size={20} className="text-blue-500" /> 시계열 시세 차트 (실시간)
              </h4>
              <span className="text-[10px] bg-slate-900 text-white px-4 py-1.5 rounded-lg font-black uppercase tracking-widest flex items-center gap-2">
                <span className="w-2 h-2 bg-emerald-500 rounded-full animate-pulse"></span> 데이터 수집 중
              </span>
            </div>
            <div className="flex-1 relative bg-slate-50/50 rounded-[3rem] border border-slate-100 overflow-hidden group">
              {ticks.length > 0 ? (
                <div className="w-full h-full p-10">
                  <SimpleLineChart data={ticks} />
                </div>
              ) : (
                <div className="w-full h-full flex flex-col items-center justify-center text-slate-300 gap-6">
                  <RotateCw size={48} className="animate-spin" />
                  <p className="text-sm font-black uppercase tracking-widest">분 단위 시세 데이터 수집 중...</p>
                </div>
              )}
            </div>
          </div>

          {/* Right: Info */}
          <div className="flex-1 p-16 overflow-y-auto scrollbar-hide space-y-12">
            <section>
              <h4 className="text-[12px] font-black text-slate-400 uppercase tracking-[0.3em] mb-8 flex items-center gap-3">
                <Layers size={20} className="text-blue-500" /> 연관 테마 분석
              </h4>
              <div className="flex flex-wrap gap-3">
                {stock.themes?.map(theme => (
                  <span key={theme} className="px-6 py-3 bg-blue-50 text-blue-600 rounded-2xl text-[12px] font-black uppercase tracking-widest shadow-sm border border-blue-100">
                    #{theme}
                  </span>
                ))}
              </div>
            </section>

            <section>
              <h4 className="text-[12px] font-black text-slate-400 uppercase tracking-[0.3em] mb-8 flex items-center gap-3">
                <Building2 size={20} className="text-purple-500" /> 기업 분석 핵심 지표
              </h4>
              <div className="grid grid-cols-2 gap-6">
                <DataCard label="PER" value={stock.per} desc="Price Earning Ratio" />
                <DataCard label="PBR" value={stock.pbr} desc="Price Book-value Ratio" />
                <DataCard label="ROE" value={stock.roe} suffix="%" desc="Return On Equity" />
                <DataCard label="시가총액" value={stock.marketCap} suffix="억" desc="Market Cap" />
              </div>
            </section>

            <section className="bg-slate-900 p-10 rounded-[2.5rem] shadow-2xl">
              <h4 className="text-[11px] font-black text-blue-400 uppercase tracking-[0.25em] mb-6">AI Strategy Insight</h4>
              <div className="space-y-6">
                <ScoreBar label="BUY" score={stock.aiScoreBuy} color="blue" />
                <ScoreBar label="SELL" score={stock.aiScoreSell} color="rose" />
              </div>
            </section>
          </div>
        </div>
      </div>
    </div>
  );
};

// --- Helpers ---
const SimpleLineChart: React.FC<{ data: StockTick[] }> = ({ data }) => {
  const prices = data.map(d => d.price);
  const min = Math.min(...prices) * 0.9995;
  const max = Math.max(...prices) * 1.0005;
  const range = max - min || 1;
  const width = 800;
  const height = 400;

  if (data.length <= 1) return <div className="flex items-center justify-center h-full text-slate-400 uppercase font-black text-xs tracking-widest">데이터 수집 부족</div>;

  const points = data.map((d, i) => {
    const x = (i / (data.length - 1)) * width;
    const y = height - ((d.price - min) / range) * height;
    return `${x},${y}`;
  }).join(' ');

  return (
    <svg viewBox={`0 0 ${width} ${height}`} className="w-full h-full overflow-visible">
      <polyline fill="none" stroke="#3b82f6" strokeWidth="4" strokeLinecap="round" strokeLinejoin="round" points={points} />
      <polygon points={`0,${height} ${points} ${width},${height}`} fill="url(#grad-dash)" />
      <circle cx={width} cy={height - ((data[data.length-1].price - min) / range) * height} r="6" fill="#3b82f6" className="animate-pulse" />
    </svg>
  );
};

const DataCard: React.FC<{ label: string, value?: number, suffix?: string, desc: string }> = ({ label, value, suffix = '', desc }) => (
  <div className="bg-white border border-slate-100 p-8 rounded-[2rem] shadow-sm hover:border-blue-100 transition-all group">
    <div className="flex justify-between items-start mb-2">
      <span className="text-[10px] font-black text-slate-400 uppercase tracking-widest">{label}</span>
      <Info size={14} className="text-slate-200 group-hover:text-blue-400 transition-colors" />
    </div>
    <div className="flex items-baseline gap-1 mb-1">
      <span className="text-2xl font-black text-slate-900 leading-none">{value !== undefined ? value.toLocaleString() : 'N/A'}</span>
      <span className="text-[12px] font-black text-slate-400">{suffix}</span>
    </div>
    <p className="text-[9px] font-bold text-slate-300 uppercase tracking-widest">{desc}</p>
  </div>
);

const ScoreBar: React.FC<{ label: string, score: number, color: 'rose' | 'blue' }> = ({ label, score, color }) => (
  <div className="space-y-1.5">
    <div className="flex justify-between items-center text-[10px] font-black">
      <span className={color === 'rose' ? 'text-rose-500' : 'text-blue-600'}>{label}</span>
      <span className="text-slate-400">{score}pt</span>
    </div>
    <div className="h-2 w-full bg-white/10 rounded-full overflow-hidden">
      <div className={`h-full transition-all duration-1000 ${color === 'rose' ? 'bg-rose-500' : 'bg-blue-600'}`} style={{ width: `${score}%` }} />
    </div>
  </div>
);

export default StockDetailModal;