import sys
import os
import time

# Add backend to path
sys.path.append(os.path.join(os.getcwd(), 'backend'))

from services.vector_store import VectorStore

def verify_isolation():
    print("Starting Verification of Session Isolation (Collection-based)...")
    
    # Initialize Store
    store = VectorStore()
    
    # Define Sessions
    session_a = "session_A_123"
    session_b = "session_B_456"
    
    # Define Data
    doc_a = [{"text": "The capital of France is Paris.", "metadata": {"source": "geography.pdf"}}]
    doc_b = [{"text": "The capital of Spain is Madrid.", "metadata": {"source": "geography.pdf"}}]
    
    # 1. Add Documents
    print("\n1️⃣ Adding documents...")
    store.add_document_chunks(1, doc_a, session_a)
    store.add_document_chunks(2, doc_b, session_b)
    
    # 2. Query Session A
    print("\n2️⃣ Querying Session A (Expect 'Paris')...")
    results_a = store.find_similar_chunks("capital", session_id=session_a, n_results=1)
    text_a = results_a['documents'][0][0] if results_a['documents'] and results_a['documents'][0] else ""
    print(f"   Result: {text_a}")
    if "Paris" in text_a and "Madrid" not in text_a:
        print("   PASS: Session A sees only its own data.")
    else:
        print("   FAIL: Session A saw wrong data.")

    # 3. Query Session B
    print("\n3️⃣ Querying Session B (Expect 'Madrid')...")
    results_b = store.find_similar_chunks("capital", session_id=session_b, n_results=1)
    text_b = results_b['documents'][0][0] if results_b['documents'] and results_b['documents'][0] else ""
    print(f"   Result: {text_b}")
    if "Madrid" in text_b and "Paris" not in text_b:
        print("   PASS: Session B sees only its own data.")
    else:
        print("   FAIL: Session B saw wrong data.")
        
    # 4. Delete Session A
    print("\n4️⃣ Deleting Session A...")
    store.delete_session_documents(session_a)
    
    # 5. Verify Deletion
    print("\n5️⃣ Verifying Deletion...")
    results_a_after = store.find_similar_chunks("capital", session_id=session_a, n_results=1)
    if not results_a_after['documents']:
        print("   PASS: Session A data is gone (Collection empty/deleted).")
    else:
        print("   FAIL: Session A data still exists.")
        
    results_b_after = store.find_similar_chunks("capital", session_id=session_b, n_results=1)
    if results_b_after['documents'] and results_b_after['documents'][0]:
        print("   PASS: Session B data still exists.")
    else:
        print("   FAIL: Session B data was accidentally deleted.")

if __name__ == "__main__":
    verify_isolation()