import React from 'react'
import { Brain, RefreshCw } from 'lucide-react'

const formatTime = (isoStr?: string) => {
    if (!isoStr) return null
    const d = new Date(isoStr)
    return d.toLocaleTimeString('ko-KR', { hour: '2-digit', minute: '2-digit', second: '2-digit', hour12: false, timeZone: 'Asia/Seoul' })
}

interface RecommendationPanelProps {
    recommendations: any | undefined
    isError: boolean
    onRefetch: () => void
    selectedStock: string
    onSelectStock: (code: string) => void
    onRefetchAiAnalysis: () => void
    heldStockCodes: Set<string>
    pendingBuyStockCodes: Set<string>
    livePrices: Record<string, number> | undefined
}

const RecommendationPanel = React.memo(({
    recommendations,
    isError,
    onRefetch,
    selectedStock,
    onSelectStock,
    onRefetchAiAnalysis,
    heldStockCodes,
    pendingBuyStockCodes,
    livePrices,
}: RecommendationPanelProps) => {
    return (
        <div className="bg-gray-800/50 backdrop-blur-sm border border-gray-700/50 rounded-xl overflow-hidden flex flex-col h-1/2 shadow-lg">
            <div className="p-3 border-b border-gray-700/50 flex justify-between items-center bg-[#1c222c]">
                <h3 className="font-semibold flex items-center gap-2 text-gray-200 text-sm">
                    <Brain className="w-4 h-4 text-purple-400" />
                    분석 종목
                </h3>
                <div className="flex items-center gap-2">
                    {recommendations?.batch_time && (
                        <span className="text-[10px] text-gray-500 font-mono">
                            {formatTime(recommendations.batch_time)}
                        </span>
                    )}
                    <span className="text-xs bg-purple-500/20 text-purple-300 px-2 py-0.5 rounded-full">
                        {recommendations?.analyzed_stocks || 0}
                    </span>
                    <button
                        onClick={onRefetch}
                        className="p-1 hover:bg-gray-700/50 rounded transition-colors"
                        title="분석 종목 새로고침"
                    >
                        <RefreshCw className="w-3 h-3 text-gray-400 hover:text-purple-400" />
                    </button>
                </div>
            </div>
            <div className="divide-y divide-gray-700/50 overflow-y-auto custom-scrollbar flex-1">
                {isError ? (
                    <div className="h-full flex flex-col items-center justify-center text-red-500 text-xs p-4 text-center">
                        <p>⚠️ API 오류</p>
                        <p className="text-[10px] text-gray-500 mt-1">백엔드 로그 확인 필요</p>
                        <button onClick={onRefetch} className="mt-2 px-2 py-1 bg-red-500/20 text-red-400 rounded text-[10px]">재시도</button>
                    </div>
                ) : recommendations === undefined ? (
                    <div className="h-full flex flex-col items-center justify-center text-gray-500 text-xs p-4">
                        <RefreshCw className="w-6 h-6 animate-spin mb-2 text-purple-400" />
                        <p>분석 종목 로딩 중...</p>
                        <p className="text-[10px] text-gray-600 mt-1">최초 로딩 시 10초 정도 소요됩니다</p>
                    </div>
                ) : (recommendations?.analyzed_stock_list || []).length > 0 ? (
                    (recommendations.analyzed_stock_list as any[]).map((stock: any, idx: number) => {
                        const isRecommended = (recommendations?.recommendations || []).some((r: any) => r.stock_code === stock.stock_code)
                        const isHeld = heldStockCodes.has(stock.stock_code)
                        const isPending = pendingBuyStockCodes.has(stock.stock_code)
                        const changeRate = stock.change_rate || 0
                        return (
                            <button
                                key={`${stock.stock_code}-${idx}`}
                                onClick={() => {
                                    if (selectedStock === stock.stock_code) {
                                        onRefetchAiAnalysis() // 같은 종목 재클릭 → 강제 새로고침
                                    } else {
                                        onSelectStock(stock.stock_code) // 새 종목 → queryKey 변경으로 자동 fetch
                                    }
                                }}
                                className={`w-full p-3 text-left hover:bg-gray-700/30 transition-all duration-200 ${selectedStock === stock.stock_code ? 'bg-purple-500/10 border-l-2 border-purple-500' : 'border-l-2 border-transparent'}`}
                            >
                                <div className="flex justify-between items-start mb-1">
                                    <div className="flex-1 min-w-0">
                                        <div className="flex items-center gap-1.5 mb-0.5">
                                            <span className="font-bold text-gray-200 text-xs truncate">{stock.stock_name}</span>
                                            <span className="text-[9px] text-gray-500 flex-shrink-0">({stock.stock_code})</span>
                                        </div>
                                        {stock.signals && stock.signals.length > 0 && (
                                            <div className="text-[9px] text-gray-500 truncate">
                                                {stock.signals.slice(0, 2).join(' · ')}
                                            </div>
                                        )}
                                    </div>
                                    <div className="flex flex-col items-end gap-0.5 flex-shrink-0 ml-1">
                                        {isPending ? (
                                            <span className="text-[9px] text-orange-400 border border-orange-500/20 bg-orange-500/10 px-1 py-0.5 rounded flex items-center gap-0.5">
                                                <RefreshCw className="w-2 h-2 animate-spin" />매수중
                                            </span>
                                        ) : isHeld ? (
                                            <span className="text-[9px] text-blue-400 border border-blue-500/20 bg-blue-500/10 px-1 py-0.5 rounded">보유중</span>
                                        ) : isRecommended ? (
                                            <span className="text-[9px] text-green-400 border border-green-500/20 bg-green-500/10 px-1 py-0.5 rounded">매수신호</span>
                                        ) : null}
                                        <span className={`text-[9px] font-bold ${changeRate > 0 ? 'text-red-400' : changeRate < 0 ? 'text-blue-400' : 'text-gray-500'}`}>
                                            {changeRate > 0 ? '+' : ''}{changeRate.toFixed(2)}%
                                        </span>
                                    </div>
                                </div>
                                <div className="flex justify-between items-center text-[9px] text-gray-500 mt-0.5">
                                    <span>{Math.round(livePrices?.[stock.stock_code] ?? stock.current_price ?? 0).toLocaleString()}원</span>
                                    <span className="flex gap-2">
                                        {stock.rsi != null && <span>RSI {stock.rsi.toFixed(0)}</span>}
                                        {stock.stochastic_k != null && <span>K {stock.stochastic_k.toFixed(0)}</span>}
                                        {stock.score > 0 && <span className="text-purple-400">{stock.score}점</span>}
                                    </span>
                                </div>
                            </button>
                        )
                    })
                ) : (
                    <div className="h-full flex flex-col items-center justify-center text-gray-500 p-4 text-center text-xs">
                        <p>배치 분석 데이터가 없습니다.</p>
                        <p className="text-[10px] text-gray-600 mt-1">make batch-test 실행 필요</p>
                    </div>
                )}
            </div>
        </div>
    )
})

RecommendationPanel.displayName = 'RecommendationPanel'
export default RecommendationPanel