import { useState, useCallback } from "react";

interface LocationData {
  latitude: number;
  longitude: number;
  accuracy?: number;
  googleMapsUrl: string;
  timestamp: Date;
}

interface LocationError {
  code: number;
  message: string;
}

export const useLocation = () => {
  const [isLoading, setIsLoading] = useState(false);
  const [location, setLocation] = useState<LocationData | null>(null);
  const [error, setError] = useState<LocationError | null>(null);

  const getLocation = useCallback(() => {
    if (!navigator.geolocation) {
      setError({
        code: 0,
        message: "Geolocation is not supported by this browser."
      });
      return;
    }

    setIsLoading(true);
    setError(null);

    navigator.geolocation.getCurrentPosition(
      (position) => {
        const lat = position.coords.latitude;
        const lng = position.coords.longitude;
        const accuracy = position.coords.accuracy;
        const googleMapsUrl = `https://maps.google.com/?q=${lat},${lng}`;
        
        const locationData: LocationData = {
          latitude: lat,
          longitude: lng,
          accuracy,
          googleMapsUrl,
          timestamp: new Date(position.timestamp)
        };

        setLocation(locationData);
        setIsLoading(false);
      },
      (err) => {
        let errorMessage: string;
        
        switch (err.code) {
          case err.PERMISSION_DENIED:
            errorMessage = "User denied the location request. Please enable location services and try again.";
            break;
          case err.POSITION_UNAVAILABLE:
            errorMessage = "Location information is unavailable. Please check your GPS/network connection.";
            break;
          case err.TIMEOUT:
            errorMessage = "Location request timed out. Please try again.";
            break;
          default:
            errorMessage = "An unknown error occurred while retrieving location.";
            break;
        }

        setError({
          code: err.code,
          message: errorMessage
        });
        setIsLoading(false);
      },
      {
        enableHighAccuracy: true,
        timeout: 10000,
        maximumAge: 60000
      }
    );
  }, []);

  const copyToClipboard = useCallback((url: string) => {
    if (navigator.clipboard) {
      return navigator.clipboard.writeText(url);
    }
    return Promise.reject("Clipboard not supported");
  }, []);

  const shareLocation = useCallback((locationData: LocationData) => {
    if (navigator.share) {
      return navigator.share({
        title: "My Location",
        url: locationData.googleMapsUrl
      });
    }
    return Promise.reject("Web Share API not supported");
  }, []);

  const clearLocation = useCallback(() => {
    setLocation(null);
    setError(null);
  }, []);

  return {
    location,
    error,
    isLoading,
    getLocation,
    copyToClipboard,
    shareLocation,
    clearLocation
  };
};