'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 { formatPrice } from '@/lib/currency';
import {
  PROJECT_STATUS_LABELS,
  type ProjectSummary,
} from '@/lib/du-an-api';
import { useMapboxStyle } from '@/lib/mapbox-style';

interface ProjectMapProps {
  projects: ProjectSummary[];
  className?: string;
}

const DEFAULT_CENTER: [number, number] = [106.6297, 10.8231]; // HCMC
const DEFAULT_ZOOM = 12;

export function ProjectMap({ projects, className }: ProjectMapProps) {
  const mapContainerRef = React.useRef<HTMLDivElement>(null);
  const mapRef = React.useRef<mapboxgl.Map | null>(null);
  const markersRef = React.useRef<mapboxgl.Marker[]>([]);
  const mapStyle = useMapboxStyle();

  const geoProjects = React.useMemo(
    () => projects.filter((p) => p.latitude != null && p.longitude != null),
    [projects],
  );

  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;
    // setStyle wipes user-added sources/layers — but these components re-add
    // markers/sources in another effect that fires after geo data changes.
    // We only need to preserve markers. Since markers are DOM-attached, they
    // survive the style swap automatically.
    map.setStyle(mapStyle);
  }, [mapStyle]);

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

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

    if (geoProjects.length === 0) return;

    const bounds = new mapboxgl.LngLatBounds();

    geoProjects.forEach((project) => {
      // Mapbox owns `transform: translate(...)` on the marker element.
      // Apply hover scale to an inner wrapper so we don't clobber it.
      const el = document.createElement('div');
      el.className = 'project-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(0,0,0,0.3);
        white-space: nowrap;
        cursor: pointer;
        border-left: 3px solid hsl(var(--primary));
        transition: transform 0.15s;
        transform: scale(1);
        max-width: 160px;
        overflow: hidden;
        text-overflow: ellipsis;
      `;
      inner.textContent = project.name;
      el.appendChild(inner);
      el.addEventListener('mouseenter', () => {
        inner.style.transform = 'scale(1.05)';
      });
      el.addEventListener('mouseleave', () => {
        inner.style.transform = 'scale(1)';
      });

      const statusLabel = PROJECT_STATUS_LABELS[project.status];
      const priceText = project.minPrice ? formatPrice(project.minPrice) : 'Liên hệ';

      const popup = new mapboxgl.Popup({ offset: 15, maxWidth: '240px', closeButton: false })
        .setHTML(
          `<div style="font-family:system-ui,sans-serif;background:hsl(var(--card));color:hsl(var(--card-foreground));padding:8px;border-radius:6px;">
            <p style="font-weight:600;font-size:13px;margin:0 0 4px;">${project.name}</p>
            <p style="font-size:12px;color:hsl(var(--muted-foreground));margin:0 0 4px;">${project.district}, ${project.city}</p>
            <p style="font-size:12px;margin:0 0 4px;">
              <span style="background:hsl(var(--secondary));padding:2px 6px;border-radius:4px;">${statusLabel}</span>
              <span style="margin-left:4px;font-weight:600;color:hsl(var(--primary));">${priceText}</span>
            </p>
            <a href="/du-an/${project.slug}" style="font-size:12px;color:hsl(var(--primary));text-decoration:none;">Xem chi tiết →</a>
          </div>`,
        );

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

      markersRef.current.push(marker);
      bounds.extend([project.longitude!, project.latitude!]);
    });

    if (geoProjects.length > 1) {
      map.fitBounds(bounds, { padding: 60, maxZoom: 15 });
    } else {
      map.flyTo({ center: [geoProjects[0]!.longitude!, geoProjects[0]!.latitude!], zoom: 14 });
    }
  }, [geoProjects]);

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

  return (
    <div className={`relative overflow-hidden rounded-lg border ${className || 'h-[400px] md:h-[500px]'}`}>
      <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">
          <p className="text-sm text-muted-foreground">
            Thiết lập NEXT_PUBLIC_MAPBOX_TOKEN để hiển thị bản đồ
          </p>
        </div>
      )}

      <div className="absolute bottom-3 left-3 rounded bg-white/90 px-2 py-1 text-xs text-muted-foreground shadow">
        {geoProjects.length} dự án trên bản đồ
      </div>
    </div>
  );
}