'use client';

import { useEffect, useState } from 'react';
import dynamic from 'next/dynamic';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Loader2, Milestone, Maximize2, Minimize2 } from 'lucide-react';
import { Button } from '@/components/ui/button';
import { Detection } from '@/types';
import { DETECTION_TYPES } from '@/constants/detectionModeConfig';

// Dynamically import the map to avoid SSR issues with Leaflet
const DashboardMapContent = dynamic(() => import('./dashboard-map-content'), {
  ssr: false,
  loading: () => (
    <div className="h-full w-full flex items-center justify-center">
      <Loader2 className="h-8 w-8 text-primary" />
    </div>
  ),
});

interface DashboardMapProps {
  className?: string;
  selectedProjectId?: string | null;
  selectedPackageId?: string | null;
  selectedChainageId?: string | null;
  projectSummary?: any;
}

export function DashboardMap({
  className,
  selectedProjectId,
  selectedPackageId,
  selectedChainageId,
  projectSummary,
}: DashboardMapProps) {
  const [detections, setDetections] = useState<Detection[]>([]);
  const [isLoading, setIsLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [isMaximized, setIsMaximized] = useState(false);
  const [selectedTypes, setSelectedTypes] = useState<string[]>([]);

  useEffect(() => {
    if (!projectSummary) {
      setDetections([]);
      setIsLoading(false);
      return;
    }

    try {
      setIsLoading(true);
      setError(null);

      const filteredDetections: Detection[] = [];

      const packagesToProcess =
        selectedPackageId && selectedPackageId !== 'all'
          ? { [selectedPackageId]: projectSummary.packages[selectedPackageId] }
          : projectSummary.packages || {};

      for (const [pkgName, pkg] of Object.entries(packagesToProcess)) {
        if (!pkg) continue;

        const chainagesToProcess =
          selectedChainageId && selectedChainageId !== 'all'
            ? {
                [selectedChainageId]: (pkg as any).chainages?.[
                  selectedChainageId
                ],
              }
            : (pkg as any).chainages || {};

        for (const [chnName, chn] of Object.entries(chainagesToProcess)) {
          if (!chn) continue;
          const chainageDetections = ((chn as any).detections || []).filter(
            (d: any) =>
              (d.type || d.class || '').toLowerCase() !== 'good_sign_board',
          );
          filteredDetections.push(...chainageDetections);
        }
      }

      setDetections(filteredDetections);
    } catch (err) {
      console.error('Failed to extract detections:', err);
      setError('Failed to load detection data');
    } finally {
      setIsLoading(false);
    }
  }, [projectSummary, selectedPackageId, selectedChainageId]);

  // Handle detection type toggle
  const toggleType = (typeId: string) => {
    setSelectedTypes((prev) => {
      if (prev.includes(typeId)) {
        const next = prev.filter((id) => id !== typeId);
        return next.length === 0 ? [] : next;
      } else {
        return [...prev, typeId];
      }
    });
  };

  // Filter detections with valid GPS coordinates and selected types
  const validDetections = detections.filter((d) => {
    const hasGps = d.latitude && d.longitude;
    if (!hasGps) return false;

    if (selectedTypes.length === 0) return true;
    const typeId = (d.type || d.class || '').toLowerCase();
    return selectedTypes.includes(typeId);
  });

  return (
    <Card
      className={`overflow-hidden transition-all duration-300 p-2 rounded-lg ${
        isMaximized
          ? 'fixed inset-0 z-100 m-0 rounded-none bg-background'
          : className
      }`}
    >
      <CardContent className="p-0 relative rounded-lg">
        {/* Top Right Actions */}
        <div className="absolute top-4 right-4 z-1000 pointer-events-none">
          <div className="pointer-events-auto">
            <Button
              variant="default"
              size="icon"
              onClick={() => setIsMaximized(!isMaximized)}
              title={isMaximized ? 'Exit Fullscreen' : 'Maximize Map'}
            >
              {isMaximized ? (
                <Minimize2 className="h-5 w-5" />
              ) : (
                <Maximize2 className="h-5 w-5" />
              )}
            </Button>
          </div>
        </div>

        {/* Bottom Left Legend */}
        <div className="absolute bottom-4 left-4 z-1000 pointer-events-none">
          <div className="pointer-events-auto bg-zinc-950/80 backdrop-blur-xl border rounded-md p-2">
            <div className="flex flex-wrap items-center gap-2 max-w-4xl">
              {Object.values(DETECTION_TYPES).map((type) => {
                const typeId = type.id.toLowerCase();
                const count = detections.filter(
                  (d) =>
                    (d.type || d.class || '').toLowerCase() === typeId &&
                    d.latitude &&
                    d.longitude,
                ).length;

                if (
                  count === 0 &&
                  (type.id.includes('culvert') || type.id === 'drain_issue')
                )
                  return null;
                if (type.id === 'good_sign_board') return null;

                const isSelected =
                  selectedTypes.length === 0 || selectedTypes.includes(typeId);

                return (
                  <button
                    key={type.id}
                    onClick={() => toggleType(typeId)}
                    className={`flex items-center gap-2 px-2 py-1.5 text-zinc-100 rounded-full transition-all text-xs ${
                      isSelected ? 'bg-zinc-800/80  ' : 'bg-transparent '
                    }`}
                  >
                    <div
                      className="w-3 h-3 rounded-sm"
                      style={{ backgroundColor: type.color }}
                    />
                    <span>
                      {type.label} ({count})
                    </span>
                  </button>
                );
              })}
            </div>
          </div>
        </div>

        <div
          className={`${isMaximized ? 'h-screen' : 'h-[600px]'} w-full relative transition-all`}
        >
          {isLoading ? (
            <div className="h-full w-full flex items-center justify-center bg-muted/50">
              <Loader2 className="h-8 w-8 text-primary animate-spin" />
            </div>
          ) : error ? (
            <div className="h-full w-full flex items-center justify-center bg-muted/50">
              <p className="text-muted-foreground">{error}</p>
            </div>
          ) : validDetections.length === 0 ? (
            <div className="h-full w-full flex items-center justify-center bg-muted/50">
              <div className="text-center">
                <p className="text-muted-foreground">
                  No detections with GPS coordinates found
                </p>
                <p className="text-sm text-muted-foreground mt-1 opacity-70">
                  Process some videos to see detections on the map
                </p>
              </div>
            </div>
          ) : (
            <DashboardMapContent detections={validDetections} />
          )}

          {/* Bottom Left Label Overlay */}
        </div>
      </CardContent>
    </Card>
  );
}