import requests


def get_local_weather(
    fallback_lat=40.59, 
    fallback_lon=-74.62, 
    fallback_city="Bridgewater", 
    fallback_region="New Jersey",
    fallback_country_code="US"
):
    """
    Fetches the user's current location and automatically determines 
    whether to return Metric or Imperial units based on their country.
    """
    lat, lon = fallback_lat, fallback_lon
    city, region = fallback_city, fallback_region
    country_code = fallback_country_code

    # Geolocation Lookup 
    try:
        geo_url = "http://ip-api.com/json"
        geo_response = requests.get(geo_url, timeout=5).json()
        
        if geo_response.get("status") == "success":
            lat = geo_response["lat"]
            lon = geo_response["lon"]
            city = geo_response["city"]
            region = geo_response["regionName"]
            country_code = geo_response.get("countryCode", "US") 
        else:
            print("IP lookup API returned an error status. Using fallback coordinates.")
    except Exception:
        print("Network error during IP lookup. Using fallback coordinates.")

    # Unit System 'n Weather URL
    is_imperial = country_code in ["US", "LR", "MM"] 
    
    unit_suffix = ""
    if is_imperial:
        unit_suffix = "&temperature_unit=fahrenheit&precipitation_unit=inch"

    weather_url = (
        f"https://api.open-meteo.com/v1/forecast?"
        f"latitude={lat}&longitude={lon}"
        f"&current=temperature_2m,precipitation,cloud_cover"
        f"&daily=temperature_2m_max,temperature_2m_min"
        f"&timezone=auto"
        f"{unit_suffix}"  
    )

    try:
        response = requests.get(weather_url, timeout=5)
        
        if response.status_code == 200:
            data = response.json()
            current = data["current"]
            daily = data["daily"]
            
            temp_unit = "°F" if is_imperial else "°C"
            precip_unit = "inch" if is_imperial else "mm"
            
            return {
                "location": {
                    "city": city, 
                    "region": region, 
                    "country_code": country_code,
                    "lat": lat, 
                    "lon": lon
                },
                "unit_system": "imperial" if is_imperial else "metric",
                "units": {"temp": temp_unit, "precipitation": precip_unit},
                "current_temp": current['temperature_2m'],
                "high_temp": daily['temperature_2m_max'][0],
                "low_temp": daily['temperature_2m_min'][0],
                "precipitation": current['precipitation'],
                "cloud_cover_pct": current['cloud_cover']
            }
        else:
            print(f"Weather API returned error code: {response.status_code}")
            return None
            
    except Exception as e:
        print(f"Network error while fetching weather: {e}")
        return None

if __name__ == "__main__":
    # Test block
    weather_data = get_local_weather()
    if weather_data:
        u = weather_data["units"]
        print(f"\n--- Location: {weather_data['location']['city']}, {weather_data['location']['region']} ({weather_data['location']['country_code']}) ---")
        print(f"System Chosen: {weather_data['unit_system'].upper()}")
        print(f"Current Temperature: {weather_data['current_temp']}{u['temp']}")
        print(f"Today's High: {weather_data['high_temp']}{u['temp']}")
        print(f"Precipitation: {weather_data['precipitation']} {u['precipitation']}")