'use client';

/* eslint-disable import-x/no-named-as-default-member */
import mapboxgl from 'mapbox-gl';
import * as React from 'react';
import 'mapbox-gl/dist/mapbox-gl.css';
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from '@/components/ui/card';
import { formatPrice, formatPricePerM2 } from '@/lib/currency';
import { useMapboxStyle } from '@/lib/mapbox-style';
import type { ValuationComparable } from '@/lib/valuation-api';

interface ComparablesMapProps {
  comparables: ValuationComparable[];
  subjectLatitude?: number;
  subjectLongitude?: number;
  className?: string;
}

const DEFAULT_CENTER: [number, number] = [106.6297, 10.8231];
const DEFAULT_ZOOM = 11;

function similarityColor(sim: number): string {
  if (sim >= 0.85) return '#16a34a';
  if (sim >= 0.7) return '#eab308';
  return '#dc2626';
}

function escapeHtml(str: string): string {
  return str
    .replace(/&/g, '&')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;')
    .replace(/'/g, '&#39;');
}

export function ComparablesMap({
  comparables,
  subjectLatitude,
  subjectLongitude,
  className,
}: ComparablesMapProps) {
  const mapContainerRef = React.useRef<HTMLDivElement>(null);
  const mapRef = React.useRef<mapboxgl.Map | null>(null);
  const markersRef = React.useRef<mapboxgl.Marker[]>([]);
  const mapStyle = useMapboxStyle();

  const geoComparables = React.useMemo(
    () =>
      comparables.filter(
        (c) => c.latitude != null && c.longitude != null,
      ),
    [comparables],
  );

  React.useEffect(() => {
    if (!mapContainerRef.current) return;

    const token = process.env['NEXT_PUBLIC_MAPBOX_TOKEN'];
    if (!token) return;

    mapboxgl.accessToken = token;

    const map = new mapboxgl.Map({
      container: mapContainerRef.current,
      style: mapStyle,
      center: DEFAULT_CENTER,
      zoom: DEFAULT_ZOOM,
      attributionControl: false,
    });

    map.addControl(new mapboxgl.NavigationControl(), 'top-right');
    map.addControl(
      new mapboxgl.AttributionControl({ compact: true }),
      'bottom-right',
    );

    mapRef.current = map;

    return () => {
      map.remove();
      mapRef.current = null;
    };
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);

  React.useEffect(() => {
    const map = mapRef.current;
    if (!map) return;
    map.setStyle(mapStyle);
  }, [mapStyle]);

  React.useEffect(() => {
    const map = mapRef.current;
    if (!map) return;

    markersRef.current.forEach((m) => m.remove());
    markersRef.current = [];

    const bounds = new mapboxgl.LngLatBounds();
    let extended = false;

    if (subjectLatitude != null && subjectLongitude != null) {
      const subjectEl = document.createElement('div');
      subjectEl.setAttribute('data-testid', 'comparables-map-subject');
      subjectEl.style.cssText = `
        width: 22px;
        height: 22px;
        border-radius: 50%;
        background: hsl(221.2, 83.2%, 53.3%);
        border: 3px solid white;
        box-shadow: 0 0 0 2px hsl(221.2, 83.2%, 53.3%), 0 2px 6px rgba(0,0,0,0.3);
      `;
      const marker = new mapboxgl.Marker({ element: subjectEl })
        .setLngLat([subjectLongitude, subjectLatitude])
        .addTo(map);
      markersRef.current.push(marker);
      bounds.extend([subjectLongitude, subjectLatitude]);
      extended = true;
    }

    geoComparables.forEach((comp) => {
      const color = similarityColor(comp.similarity);
      // Mapbox owns `transform: translate(...)` on the outer element;
      // apply hover scale to an inner wrapper to avoid clobbering it.
      const el = document.createElement('div');
      el.setAttribute('data-testid', 'comparables-map-marker');
      const inner = document.createElement('div');
      inner.style.cssText = `
        background: hsl(var(--card));
        color: hsl(var(--card-foreground));
        border-radius: 8px;
        padding: 4px 8px;
        font-size: 11px;
        font-weight: 600;
        box-shadow: 0 2px 6px rgba(0,0,0,0.15);
        white-space: nowrap;
        cursor: pointer;
        border-left: 3px solid ${color};
        transition: transform 0.15s;
        transform: scale(1);
        max-width: 180px;
        overflow: hidden;
        text-overflow: ellipsis;
      `;
      inner.textContent = formatPrice(comp.priceVND);
      el.appendChild(inner);
      el.addEventListener('mouseenter', () => {
        inner.style.transform = 'scale(1.08)';
      });
      el.addEventListener('mouseleave', () => {
        inner.style.transform = 'scale(1)';
      });

      const popup = new mapboxgl.Popup({
        offset: 15,
        maxWidth: '280px',
        closeButton: false,
      }).setHTML(
        `<div style="font-family:system-ui,sans-serif;padding:4px 0;">
          <p style="font-weight:600;font-size:13px;margin:0 0 4px;">${escapeHtml(comp.title)}</p>
          <p style="font-size:12px;color:#666;margin:0 0 4px;">${escapeHtml(comp.address)}</p>
          <p style="font-size:12px;margin:0 0 2px;">
            <span style="font-weight:600;color:hsl(221.2,83.2%,53.3%);">${formatPrice(comp.priceVND)} VNĐ</span>
            <span style="color:#666;margin-left:6px;">${formatPricePerM2(comp.pricePerM2)}</span>
          </p>
          <p style="font-size:12px;color:#666;margin:0;">
            ${comp.areaM2} m² · Tương đồng ${Math.round(comp.similarity * 100)}%
          </p>
        </div>`,
      );

      const marker = new mapboxgl.Marker({ element: el, anchor: 'left' })
        .setLngLat([comp.longitude!, comp.latitude!])
        .setPopup(popup)
        .addTo(map);

      markersRef.current.push(marker);
      bounds.extend([comp.longitude!, comp.latitude!]);
      extended = true;
    });

    if (!extended) return;

    if (!bounds.isEmpty() && markersRef.current.length > 1) {
      map.fitBounds(bounds, { padding: 60, maxZoom: 14 });
    } else if (markersRef.current.length === 1) {
      const first = geoComparables[0] ?? {
        latitude: subjectLatitude,
        longitude: subjectLongitude,
      };
      if (first.latitude != null && first.longitude != null) {
        map.flyTo({ center: [first.longitude, first.latitude], zoom: 14 });
      }
    }
  }, [geoComparables, subjectLatitude, subjectLongitude]);

  const hasToken =
    typeof process !== 'undefined' &&
    Boolean(process.env['NEXT_PUBLIC_MAPBOX_TOKEN']);

  const hasAnyGeo =
    geoComparables.length > 0 ||
    (subjectLatitude != null && subjectLongitude != null);

  return (
    <Card>
      <CardHeader>
        <CardTitle className="text-lg">Bản đồ so sánh</CardTitle>
        <CardDescription>
          Vị trí các bất động sản tương tự được sử dụng trong mô hình AVM
        </CardDescription>
      </CardHeader>
      <CardContent>
        <div
          className={`relative overflow-hidden rounded-lg border ${className || 'h-[360px] md:h-[420px]'}`}
        >
          <div ref={mapContainerRef} className="h-full w-full" />

          {!hasToken && (
            <div className="absolute inset-0 flex items-center justify-center bg-gradient-to-b from-blue-50 to-green-50 text-center text-sm text-muted-foreground">
              Thiết lập NEXT_PUBLIC_MAPBOX_TOKEN để hiển thị bản đồ
            </div>
          )}

          {hasToken && !hasAnyGeo && (
            <div className="absolute inset-0 flex items-center justify-center bg-muted/40 text-center text-sm text-muted-foreground">
              Không có toạ độ cho các BĐS so sánh
            </div>
          )}

          <div className="absolute bottom-3 left-3 rounded bg-white/90 px-2 py-1 text-xs text-muted-foreground shadow">
            {geoComparables.length} BĐS so sánh
          </div>
        </div>
      </CardContent>
    </Card>
  );
}