altered WorldTides fucntion to accept location name

app.py

@@ -24,36 +24,48 @@ except ModuleNotFoundError:
 
 
 @tool
-def get_tides_for_date(lat: float, lon: float, date: str = "today") -> str:
+def get_tides_for_location(location: str, date: str = "today") -> str:
     """Fetches the high and low tides for a specific date at a given location.
 
     Args:
-        lat: The latitude of the location.
-        lon: The longitude of the location.
+        location: The name of the city or place (e.g., 'San Francisco').
         date: The date for which to fetch tide data (format: 'YYYY-MM-DD' or 'today').
 
     Returns:
-        A string containing high and low tide times for the specified date.
-
-    Example:
-        get_tides_for_date(36.97, -122.02, "2025-02-20")  # Santa Cruz, CA on Feb 20
+        A string containing high and low tide times for the specified date and location.
     """
     try:
-        API_KEY = os.environ.get("WORLD_TIDES_KEY")
+        # Load API key from environment variable
+        API_KEY = os.getenv("WORLD_TIDES_KEY")
+
+        if not API_KEY:
+            return "API key is missing. Please set WORLDTIDES_API_KEY in Hugging Face Secrets."
+
+        # Step 1: Convert location name to latitude & longitude
+        geo_url = f"https://nominatim.openstreetmap.org/search?format=json&q={location}"
+        geo_response = requests.get(geo_url).json()
+        
+        if not geo_response:
+            return f"Could not find coordinates for {location}."
+        
+        lat = geo_response[0]["lat"]
+        lon = geo_response[0]["lon"]
+
+        # Step 2: Fetch tide data
         if date == "today":
             date = datetime.datetime.utcnow().strftime("%Y-%m-%d")  # Get today's date in UTC
 
-        url = f"https://www.worldtides.info/api/v3?extremes&lat={lat}&lon={lon}&date={date}&key={API_KEY}"
-        response = requests.get(url).json()
+        tide_url = f"https://www.worldtides.info/api/v3?extremes&lat={lat}&lon={lon}&date={date}&key={API_KEY}"
+        tide_response = requests.get(tide_url).json()
 
-        if "extremes" not in response:
-            return f"Could not fetch tide data for {date}. Ensure the location and date are valid."
+        if "extremes" not in tide_response:
+            return f"Could not fetch tide data for {location} on {date}."
 
-        tides = response["extremes"]
+        tides = tide_response["extremes"]
         if not tides:
-            return f"No tide data available for {date} at this location."
+            return f"No tide data available for {location} on {date}."
 
-        result = f"Tide data for {date}:\n"
+        result = f"Tide data for {location} on {date}:\n"
         for tide in tides:
             time_utc = tide["date"]
             tide_type = "High Tide" if tide["type"] == "High" else "Low Tide"