import { useState, useMemo } from 'react';
import { useTranslation } from 'react-i18next';
import { Marker, Popup } from 'react-map-gl/maplibre';
import type { OsintItem } from '../services/osint';

const CAT_COLOR: Record<string, string> = {
  maritime_accident: '#ef4444',
  fishing: '#22c55e',
  maritime_traffic: '#3b82f6',
  military: '#f97316',
  shipping: '#eab308',
};

const CAT_ICON: Record<string, string> = {
  maritime_accident: '🚨',
  fishing: '🐟',
  maritime_traffic: '🚢',
  military: '🎯',
  shipping: '🚢',
};

function useTimeAgo() {
  const { t } = useTranslation();
  return (ts: number): string => {
    const diff = Date.now() - ts;
    const m = Math.floor(diff / 60000);
    if (m < 60) return t('time.minutesAgo', { count: m });
    const h = Math.floor(m / 60);
    if (h < 24) return t('time.hoursAgo', { count: h });
    return t('time.daysAgo', { count: Math.floor(h / 24) });
  };
}

interface Props {
  osintFeed: OsintItem[];
  currentTime: number;
}

const THREE_HOURS = 3 * 60 * 60 * 1000;
const ONE_HOUR = 3600000;
const MAP_CATEGORIES = new Set(['maritime_accident', 'fishing', 'maritime_traffic', 'shipping', 'military']);

export function OsintMapLayer({ osintFeed, currentTime }: Props) {
  const [selected, setSelected] = useState<OsintItem | null>(null);
  const { t } = useTranslation();
  const timeAgo = useTimeAgo();

  const geoItems = useMemo(() => osintFeed.filter(
    (item): item is OsintItem & { lat: number; lng: number } =>
      item.lat != null && item.lng != null
      && MAP_CATEGORIES.has(item.category)
      && (currentTime - item.timestamp) < THREE_HOURS
  ), [osintFeed, currentTime]);

  return (
    <>
      {geoItems.map(item => {
        const color = CAT_COLOR[item.category] || '#888';
        const isRecent = currentTime - item.timestamp < ONE_HOUR;
        return (
          <Marker key={item.id} longitude={item.lng} latitude={item.lat} anchor="center"
            onClick={(e) => { e.originalEvent.stopPropagation(); setSelected(item); }}>
            <div style={{
              cursor: 'pointer',
              filter: `drop-shadow(0 0 6px ${color}aa)`,
            }} className="flex flex-col items-center">
              <div style={{
                border: `2px solid ${color}`,
                animation: isRecent ? 'pulse 2s ease-in-out infinite' : undefined,
              }} className="flex size-[22px] items-center justify-center rounded-full bg-black/60 text-xs">
                {CAT_ICON[item.category] || '📰'}
              </div>
              {isRecent && (
                <div style={{
                  fontSize: 5, color,
                  textShadow: `0 0 3px ${color}, 0 0 2px #000`,
                }} className="mt-px font-bold tracking-wide">
                  NEW
                </div>
              )}
            </div>
          </Marker>
        );
      })}

      {selected && selected.lat != null && selected.lng != null && (
        <Popup longitude={selected.lng} latitude={selected.lat}
          onClose={() => setSelected(null)} closeOnClick={false}
          anchor="bottom" maxWidth="320px" className="gl-popup">
          <div className="min-w-[240px] font-mono text-xs">
            <div style={{
              background: CAT_COLOR[selected.category] || '#888',
            }} className="-mx-2.5 -mt-2.5 mb-2 flex items-center gap-1.5 rounded-t px-2 py-1 text-[11px] font-bold text-white">
              <span>{CAT_ICON[selected.category] || '📰'}</span>
              OSINT
            </div>
            <div className="mb-1.5 text-[11px] leading-snug text-kcg-text-secondary">
              {selected.title}
            </div>
            <div className="mb-1.5 flex flex-wrap gap-1">
              <span style={{
                background: CAT_COLOR[selected.category] || '#888',
              }} className="rounded-sm px-1.5 py-px text-[9px] font-bold text-white">
                {selected.category.replace('_', ' ').toUpperCase()}
              </span>
              <span className="rounded-sm bg-kcg-card px-1.5 py-px text-[9px] text-kcg-muted">
                {selected.source}
              </span>
              <span className="rounded-sm bg-kcg-card px-1.5 py-px text-[9px] text-kcg-dim">
                {timeAgo(selected.timestamp)}
              </span>
            </div>
            {selected.url && (
              <a
                href={selected.url}
                target="_blank"
                rel="noopener noreferrer"
                className="text-[10px] text-kcg-accent underline"
              >{t('osintMap.viewOriginal')}</a>
            )}
          </div>
        </Popup>
      )}
    </>
  );
}
