change id logic for no-overwrites and easy route deletion

semantic_router/index/pinecone.py

 from pydantic.v1 import BaseModel, Field
+import requests
 import time
+import hashlib
 import os
 from typing import Any, List, Tuple, Optional, Union
 from semantic_router.index.base import BaseIndex
+from semantic_router.utils.logger import logger
 import numpy as np
-import uuid
 
 
+def clean_route_name(route_name: str) -> str:
+    return route_name.strip().replace(" ", "-")
 
 class PineconeRecord(BaseModel):
-    id: str = Field(default_factory=lambda: f"utt_{uuid.uuid4().hex}")
+    id: str = ""
     values: List[float]
     route: str
     utterance: str
 
+    def __init__(self, **data):
+        super().__init__(**data)
+        # generate ID based on route name and utterances to prevent duplicates
+        clean_route = clean_route_name(self.route)
+        utterance_id = hashlib.md5(self.utterance.encode()).hexdigest()
+        self.id = f"{clean_route}#{utterance_id}"
+
     def to_dict(self):
         return {
-            "id": f"{self.route}#{self.id}",
+            "id": self.id,
             "values": self.values,
             "metadata": {
                 "sr_route": self.route,
@@ -32,8 +43,10 @@ class PineconeIndex(BaseIndex):
     metric: str = "cosine"
     cloud: str = "aws"
     region: str = "us-west-2" 
+    host: str = ""
     client: Any = Field(default=None, exclude=True)
     index: Optional[Any] = Field(default=None, exclude=True)
+    ServerlessSpec: Any = Field(default=None, exclude=True)
 
     def __init__(self, **data):
         super().__init__(**data) 
@@ -91,7 +104,10 @@ class PineconeIndex(BaseIndex):
         else:
             # if the index doesn't exist and we don't have the dimensions
             # we return None
+            logger.warning("Index could not be initialized.")
             index = None
+        if index is not None:
+            self.host = self.client.describe_index(self.index_name)["host"]
         return index
         
     def add(self, embeddings: List[List[float]], routes: List[str], utterances: List[str]):
@@ -105,8 +121,17 @@ class PineconeIndex(BaseIndex):
             vectors_to_upsert.append(record.to_dict())
         self.index.upsert(vectors=vectors_to_upsert)
 
+    def _get_route_vecs(self, route_name: str):
+        clean_route = clean_route_name(route_name)
+        res = requests.get(
+            f"https://{self.host}/vectors/list?prefix={clean_route}#",
+            headers={"Api-Key": os.environ["PINECONE_API_KEY"]}
+        )
+        return [vec["id"] for vec in res.json()["vectors"]]
+
     def delete(self, route_name: str):
-        self.index.delete(ids=ids_to_remove)
+        route_vec_ids = self._get_route_vecs(route_name=route_name)
+        self.index.delete(ids=route_vec_ids)
 
     def delete_all(self):
         self.index.delete(delete_all=True)
@@ -124,11 +149,14 @@ class PineconeIndex(BaseIndex):
         results = self.index.query(
             vector=[query_vector_list], 
             top_k=top_k,
-            include_metadata=True
+            include_metadata=True,
         )
         scores = [result["score"] for result in results["matches"]]
         route_names = [result["metadata"]["sr_route"] for result in results["matches"]]
         return np.array(scores), route_names
 
     def delete_index(self):
-        self.client.delete_index(self.index_name)
+        self.client.delete_index(self.index_name)
\ No newline at end of file
+
+    def __len__(self):
+        return self.index.describe_index_stats()["total_vector_count"]
\ No newline at end of file