import { useMemo, useState } from 'react';
import { Marker, Popup } from 'react-map-gl/maplibre';
import type { PowerFacility } from '../services/infra';

// SVG Wind Turbine Icon
function WindTurbineIcon({ color, size = 14 }: { color: string; size?: number }) {
  return (
    <svg width={size} height={size} viewBox="0 0 24 24" fill="none">
      {/* Tower */}
      <line x1="12" y1="10" x2="11" y2="23" stroke={color} strokeWidth="1.5" />
      <line x1="12" y1="10" x2="13" y2="23" stroke={color} strokeWidth="1.5" />
      {/* Hub */}
      <circle cx="12" cy="9" r="1.5" fill={color} />
      {/* Blade 1 - top */}
      <path d="M12 9 L11.5 1 Q12 0 12.5 1 Z" fill={color} opacity="0.9" />
      {/* Blade 2 - bottom-right */}
      <path d="M12 9 L18 14 Q18.5 13 17.5 12.5 Z" fill={color} opacity="0.9" />
      {/* Blade 3 - bottom-left */}
      <path d="M12 9 L6 14 Q5.5 13 6.5 12.5 Z" fill={color} opacity="0.9" />
      {/* Base */}
      <line x1="8" y1="23" x2="16" y2="23" stroke={color} strokeWidth="1.5" />
    </svg>
  );
}

interface Props {
  facilities: PowerFacility[];
}

// Source → icon & color
const SOURCE_STYLE: Record<string, { icon: string; color: string; label: string }> = {
  nuclear:  { icon: '☢️', color: '#e040fb', label: '원자력' },
  coal:     { icon: '🏭', color: '#795548', label: '석탄' },
  gas:      { icon: '🔥', color: '#ff9800', label: 'LNG' },
  oil:      { icon: '🛢️', color: '#5d4037', label: '석유' },
  hydro:    { icon: '💧', color: '#2196f3', label: '수력' },
  solar:    { icon: '☀️', color: '#ffc107', label: '태양광' },
  wind:     { icon: '🌀', color: '#00bcd4', label: '풍력' },
  biomass:  { icon: '🌿', color: '#4caf50', label: '바이오' },
};

const SUBSTATION_STYLE = { icon: '⚡', color: '#ffeb3b', label: '변전소' };

function getStyle(f: PowerFacility) {
  if (f.type === 'substation') return SUBSTATION_STYLE;
  return SOURCE_STYLE[f.source || ''] || { icon: '⚡', color: '#9e9e9e', label: '발전소' };
}

function formatVoltage(v?: string): string {
  if (!v) return '';
  const kv = parseInt(v) / 1000;
  if (isNaN(kv)) return v;
  return `${kv}kV`;
}

export function InfraLayer({ facilities }: Props) {
  const [selectedId, setSelectedId] = useState<string | null>(null);

  const plants = useMemo(() => facilities.filter(f => f.type === 'plant'), [facilities]);
  const substations = useMemo(() => facilities.filter(f => f.type === 'substation'), [facilities]);

  const selected = selectedId ? facilities.find(f => f.id === selectedId) ?? null : null;

  return (
    <>
      {/* Substations — smaller, show at higher zoom */}
      {substations.map(f => {
        const s = getStyle(f);
        return (
          <Marker key={f.id} longitude={f.lng} latitude={f.lat} anchor="center"
            onClick={(e) => { e.originalEvent.stopPropagation(); setSelectedId(f.id); }}>
            <div style={{
              width: 7, height: 7, borderRadius: 1,
              background: '#1a1a2e', border: `1px solid ${s.color}`,
              display: 'flex', alignItems: 'center', justifyContent: 'center',
              fontSize: 4, cursor: 'pointer',
            }}>
              <span>{s.icon}</span>
            </div>
          </Marker>
        );
      })}

      {/* Power plants — larger, always visible */}
      {plants.map(f => {
        const s = getStyle(f);
        const isWind = f.source === 'wind';
        return (
          <Marker key={f.id} longitude={f.lng} latitude={f.lat} anchor="center"
            onClick={(e) => { e.originalEvent.stopPropagation(); setSelectedId(f.id); }}>
            <div style={{
              display: 'flex', flexDirection: 'column', alignItems: 'center',
              cursor: 'pointer', pointerEvents: 'auto',
            }}>
              {isWind ? (
                <WindTurbineIcon color={s.color} size={14} />
              ) : (
                <div style={{
                  width: 12, height: 12, borderRadius: 2,
                  background: '#111', border: `1px solid ${s.color}`,
                  display: 'flex', alignItems: 'center', justifyContent: 'center',
                  fontSize: 7, boxShadow: `0 0 3px ${s.color}33`,
                }}>
                  <span>{s.icon}</span>
                </div>
              )}
              <div style={{
                fontSize: 6, color: s.color, marginTop: 1,
                textShadow: '0 0 3px #000, 0 0 3px #000',
                whiteSpace: 'nowrap', fontWeight: 600,
              }}>
                {f.name.length > 10 ? f.name.slice(0, 10) + '..' : f.name}
              </div>
            </div>
          </Marker>
        );
      })}

      {/* Popup */}
      {selected && (
        <Popup longitude={selected.lng} latitude={selected.lat}
          onClose={() => setSelectedId(null)} closeOnClick={false}
          anchor="bottom" maxWidth="280px" className="gl-popup">
          <div style={{ fontFamily: 'monospace', fontSize: 12, minWidth: 200 }}>
            <div style={{
              background: getStyle(selected).color, color: '#000',
              padding: '4px 8px', borderRadius: '4px 4px 0 0',
              margin: '-10px -10px 8px -10px',
              fontWeight: 700, fontSize: 13,
              display: 'flex', alignItems: 'center', gap: 6,
            }}>
              <span>{getStyle(selected).icon}</span>
              {selected.name}
            </div>
            <div style={{ display: 'flex', gap: 4, marginBottom: 6 }}>
              <span style={{
                background: getStyle(selected).color, color: '#000',
                padding: '1px 6px', borderRadius: 3, fontSize: 10, fontWeight: 700,
              }}>
                {getStyle(selected).label}
              </span>
              <span style={{
                background: '#333', color: '#ccc',
                padding: '1px 6px', borderRadius: 3, fontSize: 10,
              }}>
                {selected.type === 'plant' ? '발전소' : '변전소'}
              </span>
            </div>
            <div style={{ fontSize: 11, display: 'flex', flexDirection: 'column', gap: 2 }}>
              {selected.output && (
                <div><span style={{ color: '#888' }}>출력: </span><strong>{selected.output}</strong></div>
              )}
              {selected.voltage && (
                <div><span style={{ color: '#888' }}>전압: </span><strong>{formatVoltage(selected.voltage)}</strong></div>
              )}
              {selected.operator && (
                <div><span style={{ color: '#888' }}>운영: </span>{selected.operator}</div>
              )}
              {selected.source && (
                <div><span style={{ color: '#888' }}>연료: </span>{selected.source}</div>
              )}
              <div style={{ fontSize: 9, color: '#666', marginTop: 2 }}>
                {selected.lat.toFixed(4)}°N, {selected.lng.toFixed(4)}°E
              </div>
            </div>
          </div>
        </Popup>
      )}
    </>
  );
}