import { useEffect } from 'react';
import { useTranslation } from 'react-i18next';
import { Card, CardContent } from '@shared/components/ui/card';
import { Badge } from '@shared/components/ui/badge';
import { Activity, AlertTriangle, Ship, Eye, Anchor, Radar, Shield, Bell, Clock, Target, ChevronRight } from 'lucide-react';
import type { LucideIcon } from 'lucide-react';
import { AreaChart, PieChart } from '@lib/charts';
import { useKpiStore } from '@stores/kpiStore';
import { useEventStore } from '@stores/eventStore';

/* SFR-12: 모니터링 및 경보 현황판(대시보드) */

// KPI UI 매핑 (icon, color는 store에 없으므로 라벨 기반 매핑)
const KPI_UI_MAP: Record<string, { icon: LucideIcon; color: string }> = {
  '실시간 탐지': { icon: Radar, color: '#3b82f6' },
  'EEZ 침범': { icon: AlertTriangle, color: '#ef4444' },
  '다크베셀': { icon: Eye, color: '#f97316' },
  '불법환적 의심': { icon: Anchor, color: '#a855f7' },
  '추적 중': { icon: Target, color: '#06b6d4' },
  '나포/검문': { icon: Shield, color: '#10b981' },
};
const TREND = Array.from({ length: 24 }, (_, i) => ({ h: `${i}시`, risk: 30 + Math.floor(Math.random() * 50), alarms: Math.floor(Math.random() * 8) }));
// 위반 유형 → 차트 색상 매핑
const PIE_COLOR_MAP: Record<string, string> = {
  'EEZ 침범': '#ef4444', '다크베셀': '#f97316', 'MMSI 변조': '#eab308',
  '불법환적': '#a855f7', '어구 불법': '#6b7280',
};
const LV: Record<string, string> = { CRITICAL: 'text-red-400 bg-red-500/15', HIGH: 'text-orange-400 bg-orange-500/15', MEDIUM: 'text-yellow-400 bg-yellow-500/15', LOW: 'text-blue-400 bg-blue-500/15' };

export function MonitoringDashboard() {
  const { t } = useTranslation('dashboard');
  const kpiStore = useKpiStore();
  const eventStore = useEventStore();

  useEffect(() => { if (!kpiStore.loaded) kpiStore.load(); }, [kpiStore.loaded, kpiStore.load]);
  useEffect(() => { if (!eventStore.loaded) eventStore.load(); }, [eventStore.loaded, eventStore.load]);

  // KPI: store metrics + UI 매핑
  const KPI = kpiStore.metrics.map((m) => ({
    label: m.label,
    value: m.value,
    icon: KPI_UI_MAP[m.label]?.icon ?? Radar,
    color: KPI_UI_MAP[m.label]?.color ?? '#3b82f6',
  }));

  // PIE: store violationTypes → 차트 데이터 변환
  const PIE = kpiStore.violationTypes.map((v) => ({
    name: v.type,
    value: v.pct,
    color: PIE_COLOR_MAP[v.type] ?? '#6b7280',
  }));

  // 이벤트: store events → 첫 6개, time 포맷 변환
  const EVENTS = eventStore.events.slice(0, 6).map((e) => ({
    time: e.time.includes(' ') ? e.time.split(' ')[1].slice(0, 5) : e.time,
    level: e.level,
    title: e.title,
    detail: e.detail,
  }));

  return (
    <div className="p-5 space-y-4">
      <div>
        <h2 className="text-lg font-bold text-heading whitespace-nowrap flex items-center gap-2"><Activity className="w-5 h-5 text-green-400" />{t('monitoring.title')}</h2>
        <p className="text-[10px] text-hint mt-0.5">{t('monitoring.desc')}</p>
      </div>
      <div className="flex gap-2">
        {KPI.map(k => (
          <div key={k.label} className="flex-1 flex items-center gap-2 px-3 py-2 rounded-xl border border-border bg-card">
            <div className="p-1.5 rounded-lg" style={{ backgroundColor: `${k.color}15` }}><k.icon className="w-4 h-4" style={{ color: k.color }} /></div>
            <span className="text-lg font-bold text-heading">{k.value}</span>
            <span className="text-[9px] text-hint">{k.label}</span>
          </div>
        ))}
      </div>
      <div className="grid grid-cols-3 gap-3">
        <Card className="col-span-2 bg-surface-raised border-border"><CardContent className="p-4">
          <div className="text-[12px] font-bold text-label mb-3">24시간 위험도·경보 추이</div>
          <AreaChart data={TREND} xKey="h" height={200} series={[{ key: 'risk', name: '위험도', color: '#ef4444' }, { key: 'alarms', name: '경보', color: '#3b82f6' }]} />
        </CardContent></Card>
        <Card><CardContent className="p-4">
          <div className="text-[12px] font-bold text-label mb-3">탐지 유형 분포</div>
          <PieChart data={PIE} height={140} innerRadius={30} outerRadius={55} />
          <div className="space-y-1 mt-2">{PIE.map(d => (
            <div key={d.name} className="flex justify-between text-[10px]"><div className="flex items-center gap-1.5"><div className="w-2 h-2 rounded-full" style={{ backgroundColor: d.color }} /><span className="text-muted-foreground">{d.name}</span></div><span className="text-heading font-bold">{d.value}%</span></div>
          ))}</div>
        </CardContent></Card>
      </div>
      <Card><CardContent className="p-4">
        <div className="text-[12px] font-bold text-label mb-3 flex items-center gap-1.5"><Bell className="w-4 h-4 text-red-400" />실시간 이벤트 타임라인</div>
        <div className="space-y-2">
          {EVENTS.map((e, i) => (
            <div key={i} className="flex items-center gap-3 px-3 py-2 bg-surface-overlay rounded-lg">
              <span className="text-[10px] text-hint font-mono w-10">{e.time}</span>
              <Badge className={`border-0 text-[9px] w-16 text-center ${LV[e.level]}`}>{e.level}</Badge>
              <span className="text-[11px] text-heading font-medium flex-1">{e.title}</span>
              <span className="text-[10px] text-hint">{e.detail}</span>
            </div>
          ))}
        </div>
      </CardContent></Card>
    </div>
  );
}