Update agent.py

agent.py

@@ -1,36 +1,15 @@
+"""LangGraph Agent"""
 import os
 from dotenv import load_dotenv
-from typing import List, Dict, Any, Optional
-import tempfile
-import re
-import json
-import requests
-from urllib.parse import urlparse
-import pytesseract
-from PIL import Image, ImageDraw, ImageFont, ImageEnhance, ImageFilter
-import cmath
-import pandas as pd
-import uuid
-import numpy as np
-from code_interpreter import CodeInterpreter
-
-interpreter_instance = CodeInterpreter()
-
-from image_processing import *
-
-"""Langraph"""
 from langgraph.graph import START, StateGraph, MessagesState
+from langgraph.prebuilt import tools_condition
+from langgraph.prebuilt import ToolNode
+from langchain_google_genai import ChatGoogleGenerativeAI
+from langchain_groq import ChatGroq
+from langchain_huggingface import ChatHuggingFace, HuggingFaceEndpoint, HuggingFaceEmbeddings
 from langchain_community.tools.tavily_search import TavilySearchResults
 from langchain_community.document_loaders import WikipediaLoader
 from langchain_community.document_loaders import ArxivLoader
-from langgraph.prebuilt import ToolNode, tools_condition
-from langchain_google_genai import ChatGoogleGenerativeAI
-from langchain_groq import ChatGroq
-from langchain_huggingface import (
-    ChatHuggingFace,
-    HuggingFaceEndpoint,
-    HuggingFaceEmbeddings,
-)
 from langchain_community.vectorstores import SupabaseVectorStore
 from langchain_core.messages import SystemMessage, HumanMessage
 from langchain_core.tools import tool
@@ -39,639 +18,118 @@ from supabase.client import Client, create_client
 
 load_dotenv()
 
-### =============== BROWSER TOOLS =============== ###
-
-
-@tool
-def wiki_search(query: str) -> str:
-    """Search Wikipedia for a query and return maximum 2 results.
-    Args:
-        query: The search query."""
-    search_docs = WikipediaLoader(query=query, load_max_docs=2).load()
-    formatted_search_docs = "\n\n---\n\n".join(
-        [
-            f'<Document source="{doc.metadata["source"]}" page="{doc.metadata.get("page", "")}"/>\n{doc.page_content}\n</Document>'
-            for doc in search_docs
-        ]
-    )
-    return {"wiki_results": formatted_search_docs}
-
-
-@tool
-def web_search(query: str) -> str:
-    """Search Tavily for a query and return maximum 3 results.
-    Args:
-        query: The search query."""
-    search_docs = TavilySearchResults(max_results=3).invoke(query=query)
-    formatted_search_docs = "\n\n---\n\n".join(
-        [
-            f'<Document source="{doc.metadata["source"]}" page="{doc.metadata.get("page", "")}"/>\n{doc.page_content}\n</Document>'
-            for doc in search_docs
-        ]
-    )
-    return {"web_results": formatted_search_docs}
-
-
-@tool
-def arxiv_search(query: str) -> str:
-    """Search Arxiv for a query and return maximum 3 result.
-    Args:
-        query: The search query."""
-    search_docs = ArxivLoader(query=query, load_max_docs=3).load()
-    formatted_search_docs = "\n\n---\n\n".join(
-        [
-            f'<Document source="{doc.metadata["source"]}" page="{doc.metadata.get("page", "")}"/>\n{doc.page_content[:1000]}\n</Document>'
-            for doc in search_docs
-        ]
-    )
-    return {"arxiv_results": formatted_search_docs}
-
-
-### =============== CODE INTERPRETER TOOLS =============== ###
-
-
 @tool
-def execute_code_multilang(code: str, language: str = "python") -> str:
-    """Execute code in multiple languages (Python, Bash, SQL, C, Java) and return results.
+def multiply(a: int, b: int) -> int:
+    """Multiply two numbers.
     Args:
-        code (str): The source code to execute.
-        language (str): The language of the code. Supported: "python", "bash", "sql", "c", "java".
-    Returns:
-        A string summarizing the execution results (stdout, stderr, errors, plots, dataframes if any).
-    """
-    supported_languages = ["python", "bash", "sql", "c", "java"]
-    language = language.lower()
-
-    if language not in supported_languages:
-        return f"❌ Unsupported language: {language}. Supported languages are: {', '.join(supported_languages)}"
-
-    result = interpreter_instance.execute_code(code, language=language)
-
-    response = []
-
-    if result["status"] == "success":
-        response.append(f"✅ Code executed successfully in **{language.upper()}**")
-
-        if result.get("stdout"):
-            response.append(
-                "\n**Standard Output:**\n```\n" + result["stdout"].strip() + "\n```"
-            )
-
-        if result.get("stderr"):
-            response.append(
-                "\n**Standard Error (if any):**\n```\n"
-                + result["stderr"].strip()
-                + "\n```"
-            )
-
-        if result.get("result") is not None:
-            response.append(
-                "\n**Execution Result:**\n```\n"
-                + str(result["result"]).strip()
-                + "\n```"
-            )
-
-        if result.get("dataframes"):
-            for df_info in result["dataframes"]:
-                response.append(
-                    f"\n**DataFrame `{df_info['name']}` (Shape: {df_info['shape']})**"
-                )
-                df_preview = pd.DataFrame(df_info["head"])
-                response.append("First 5 rows:\n```\n" + str(df_preview) + "\n```")
-
-        if result.get("plots"):
-            response.append(
-                f"\n**Generated {len(result['plots'])} plot(s)** (Image data returned separately)"
-            )
-
-    else:
-        response.append(f"❌ Code execution failed in **{language.upper()}**")
-        if result.get("stderr"):
-            response.append(
-                "\n**Error Log:**\n```\n" + result["stderr"].strip() + "\n```"
-            )
-
-    return "\n".join(response)
-
-
-### =============== MATHEMATICAL TOOLS =============== ###
-
-
-@tool
-def multiply(a: float, b: float) -> float:
-    """
-    Multiplies two numbers.
-    Args:
-        a (float): the first number
-        b (float): the second number
+        a: first int
+        b: second int
     """
     return a * b
 
-
 @tool
-def add(a: float, b: float) -> float:
-    """
-    Adds two numbers.
+def add(a: int, b: int) -> int:
+    """Add two numbers.
+    
     Args:
-        a (float): the first number
-        b (float): the second number
+        a: first int
+        b: second int
     """
     return a + b
 
-
 @tool
-def subtract(a: float, b: float) -> int:
-    """
-    Subtracts two numbers.
+def subtract(a: int, b: int) -> int:
+    """Subtract two numbers.
+    
     Args:
-        a (float): the first number
-        b (float): the second number
+        a: first int
+        b: second int
     """
     return a - b
 
-
 @tool
-def divide(a: float, b: float) -> float:
-    """
-    Divides two numbers.
+def divide(a: int, b: int) -> int:
+    """Divide two numbers.
+    
     Args:
-        a (float): the first float number
-        b (float): the second float number
+        a: first int
+        b: second int
     """
     if b == 0:
-        raise ValueError("Cannot divided by zero.")
+        raise ValueError("Cannot divide by zero.")
     return a / b
 
-
 @tool
 def modulus(a: int, b: int) -> int:
-    """
-    Get the modulus of two numbers.
+    """Get the modulus of two numbers.
+    
     Args:
-        a (int): the first number
-        b (int): the second number
+        a: first int
+        b: second int
     """
     return a % b
 
-
-@tool
-def power(a: float, b: float) -> float:
-    """
-    Get the power of two numbers.
-    Args:
-        a (float): the first number
-        b (float): the second number
-    """
-    return a**b
-
-
-@tool
-def square_root(a: float) -> float | complex:
-    """
-    Get the square root of a number.
-    Args:
-        a (float): the number to get the square root of
-    """
-    if a >= 0:
-        return a**0.5
-    return cmath.sqrt(a)
-
-
-### =============== DOCUMENT PROCESSING TOOLS =============== ###
-
-
-@tool
-def save_and_read_file(content: str, filename: Optional[str] = None) -> str:
-    """
-    Save content to a file and return the path.
-    Args:
-        content (str): the content to save to the file
-        filename (str, optional): the name of the file. If not provided, a random name file will be created.
-    """
-    temp_dir = tempfile.gettempdir()
-    if filename is None:
-        temp_file = tempfile.NamedTemporaryFile(delete=False, dir=temp_dir)
-        filepath = temp_file.name
-    else:
-        filepath = os.path.join(temp_dir, filename)
-
-    with open(filepath, "w") as f:
-        f.write(content)
-
-    return f"File saved to {filepath}. You can read this file to process its contents."
-
-
-@tool
-def download_file_from_url(url: str, filename: Optional[str] = None) -> str:
-    """
-    Download a file from a URL and save it to a temporary location.
-    Args:
-        url (str): the URL of the file to download.
-        filename (str, optional): the name of the file. If not provided, a random name file will be created.
-    """
-    try:
-        # Parse URL to get filename if not provided
-        if not filename:
-            path = urlparse(url).path
-            filename = os.path.basename(path)
-            if not filename:
-                filename = f"downloaded_{uuid.uuid4().hex[:8]}"
-
-        # Create temporary file
-        temp_dir = tempfile.gettempdir()
-        filepath = os.path.join(temp_dir, filename)
-
-        # Download the file
-        response = requests.get(url, stream=True)
-        response.raise_for_status()
-
-        # Save the file
-        with open(filepath, "wb") as f:
-            for chunk in response.iter_content(chunk_size=8192):
-                f.write(chunk)
-
-        return f"File downloaded to {filepath}. You can read this file to process its contents."
-    except Exception as e:
-        return f"Error downloading file: {str(e)}"
-
-
 @tool
-def extract_text_from_image(image_path: str) -> str:
-    """
-    Extract text from an image using OCR library pytesseract (if available).
-    Args:
-        image_path (str): the path to the image file.
-    """
-    try:
-        # Open the image
-        image = Image.open(image_path)
-
-        # Extract text from the image
-        text = pytesseract.image_to_string(image)
-
-        return f"Extracted text from image:\n\n{text}"
-    except Exception as e:
-        return f"Error extracting text from image: {str(e)}"
-
-
-@tool
-def analyze_csv_file(file_path: str, query: str) -> str:
-    """
-    Analyze a CSV file using pandas and answer a question about it.
-    Args:
-        file_path (str): the path to the CSV file.
-        query (str): Question about the data
-    """
-    try:
-        # Read the CSV file
-        df = pd.read_csv(file_path)
-
-        # Run various analyses based on the query
-        result = f"CSV file loaded with {len(df)} rows and {len(df.columns)} columns.\n"
-        result += f"Columns: {', '.join(df.columns)}\n\n"
-
-        # Add summary statistics
-        result += "Summary statistics:\n"
-        result += str(df.describe())
-
-        return result
-
-    except Exception as e:
-        return f"Error analyzing CSV file: {str(e)}"
-
-
-@tool
-def analyze_excel_file(file_path: str, query: str) -> str:
-    """
-    Analyze an Excel file using pandas and answer a question about it.
-    Args:
-        file_path (str): the path to the Excel file.
-        query (str): Question about the data
-    """
-    try:
-        # Read the Excel file
-        df = pd.read_excel(file_path)
-
-        # Run various analyses based on the query
-        result = (
-            f"Excel file loaded with {len(df)} rows and {len(df.columns)} columns.\n"
-        )
-        result += f"Columns: {', '.join(df.columns)}\n\n"
-
-        # Add summary statistics
-        result += "Summary statistics:\n"
-        result += str(df.describe())
-
-        return result
-
-    except Exception as e:
-        return f"Error analyzing Excel file: {str(e)}"
-
-
-### ============== IMAGE PROCESSING AND GENERATION TOOLS =============== ###
-
-
-@tool
-def analyze_image(image_base64: str) -> Dict[str, Any]:
-    """
-    Analyze basic properties of an image (size, mode, color analysis, thumbnail preview).
-    Args:
-        image_base64 (str): Base64 encoded image string
-    Returns:
-        Dictionary with analysis result
-    """
-    try:
-        img = decode_image(image_base64)
-        width, height = img.size
-        mode = img.mode
-
-        if mode in ("RGB", "RGBA"):
-            arr = np.array(img)
-            avg_colors = arr.mean(axis=(0, 1))
-            dominant = ["Red", "Green", "Blue"][np.argmax(avg_colors[:3])]
-            brightness = avg_colors.mean()
-            color_analysis = {
-                "average_rgb": avg_colors.tolist(),
-                "brightness": brightness,
-                "dominant_color": dominant,
-            }
-        else:
-            color_analysis = {"note": f"No color analysis for mode {mode}"}
-
-        thumbnail = img.copy()
-        thumbnail.thumbnail((100, 100))
-        thumb_path = save_image(thumbnail, "thumbnails")
-        thumbnail_base64 = encode_image(thumb_path)
-
-        return {
-            "dimensions": (width, height),
-            "mode": mode,
-            "color_analysis": color_analysis,
-            "thumbnail": thumbnail_base64,
-        }
-    except Exception as e:
-        return {"error": str(e)}
-
-
-@tool
-def transform_image(
-    image_base64: str, operation: str, params: Optional[Dict[str, Any]] = None
-) -> Dict[str, Any]:
-    """
-    Apply transformations: resize, rotate, crop, flip, brightness, contrast, blur, sharpen, grayscale.
-    Args:
-        image_base64 (str): Base64 encoded input image
-        operation (str): Transformation operation
-        params (Dict[str, Any], optional): Parameters for the operation
-    Returns:
-        Dictionary with transformed image (base64)
-    """
-    try:
-        img = decode_image(image_base64)
-        params = params or {}
-
-        if operation == "resize":
-            img = img.resize(
-                (
-                    params.get("width", img.width // 2),
-                    params.get("height", img.height // 2),
-                )
-            )
-        elif operation == "rotate":
-            img = img.rotate(params.get("angle", 90), expand=True)
-        elif operation == "crop":
-            img = img.crop(
-                (
-                    params.get("left", 0),
-                    params.get("top", 0),
-                    params.get("right", img.width),
-                    params.get("bottom", img.height),
-                )
-            )
-        elif operation == "flip":
-            if params.get("direction", "horizontal") == "horizontal":
-                img = img.transpose(Image.FLIP_LEFT_RIGHT)
-            else:
-                img = img.transpose(Image.FLIP_TOP_BOTTOM)
-        elif operation == "adjust_brightness":
-            img = ImageEnhance.Brightness(img).enhance(params.get("factor", 1.5))
-        elif operation == "adjust_contrast":
-            img = ImageEnhance.Contrast(img).enhance(params.get("factor", 1.5))
-        elif operation == "blur":
-            img = img.filter(ImageFilter.GaussianBlur(params.get("radius", 2)))
-        elif operation == "sharpen":
-            img = img.filter(ImageFilter.SHARPEN)
-        elif operation == "grayscale":
-            img = img.convert("L")
-        else:
-            return {"error": f"Unknown operation: {operation}"}
-
-        result_path = save_image(img)
-        result_base64 = encode_image(result_path)
-        return {"transformed_image": result_base64}
-
-    except Exception as e:
-        return {"error": str(e)}
-
-
-@tool
-def draw_on_image(
-    image_base64: str, drawing_type: str, params: Dict[str, Any]
-) -> Dict[str, Any]:
-    """
-    Draw shapes (rectangle, circle, line) or text onto an image.
+def wiki_search(query: str) -> str:
+    """Search Wikipedia for a query and return maximum 2 results.
+    
     Args:
-        image_base64 (str): Base64 encoded input image
-        drawing_type (str): Drawing type
-        params (Dict[str, Any]): Drawing parameters
-    Returns:
-        Dictionary with result image (base64)
-    """
-    try:
-        img = decode_image(image_base64)
-        draw = ImageDraw.Draw(img)
-        color = params.get("color", "red")
-
-        if drawing_type == "rectangle":
-            draw.rectangle(
-                [params["left"], params["top"], params["right"], params["bottom"]],
-                outline=color,
-                width=params.get("width", 2),
-            )
-        elif drawing_type == "circle":
-            x, y, r = params["x"], params["y"], params["radius"]
-            draw.ellipse(
-                (x - r, y - r, x + r, y + r),
-                outline=color,
-                width=params.get("width", 2),
-            )
-        elif drawing_type == "line":
-            draw.line(
-                (
-                    params["start_x"],
-                    params["start_y"],
-                    params["end_x"],
-                    params["end_y"],
-                ),
-                fill=color,
-                width=params.get("width", 2),
-            )
-        elif drawing_type == "text":
-            font_size = params.get("font_size", 20)
-            try:
-                font = ImageFont.truetype("arial.ttf", font_size)
-            except IOError:
-                font = ImageFont.load_default()
-            draw.text(
-                (params["x"], params["y"]),
-                params.get("text", "Text"),
-                fill=color,
-                font=font,
-            )
-        else:
-            return {"error": f"Unknown drawing type: {drawing_type}"}
-
-        result_path = save_image(img)
-        result_base64 = encode_image(result_path)
-        return {"result_image": result_base64}
-
-    except Exception as e:
-        return {"error": str(e)}
-
+        query: The search query."""
+    search_docs = WikipediaLoader(query=query, load_max_docs=2).load()
+    formatted_search_docs = "\n\n---\n\n".join(
+        [
+            f'<Document source="{doc.metadata["source"]}" page="{doc.metadata.get("page", "")}"/>\n{doc.page_content}\n</Document>'
+            for doc in search_docs
+        ])
+    return {"wiki_results": formatted_search_docs}
 
 @tool
-def generate_simple_image(
-    image_type: str,
-    width: int = 500,
-    height: int = 500,
-    params: Optional[Dict[str, Any]] = None,
-) -> Dict[str, Any]:
-    """
-    Generate a simple image (gradient, noise, pattern, chart).
+def web_search(query: str) -> str:
+    """Search Tavily for a query and return maximum 3 results.
+    
     Args:
-        image_type (str): Type of image
-        width (int), height (int)
-        params (Dict[str, Any], optional): Specific parameters
-    Returns:
-        Dictionary with generated image (base64)
-    """
-    try:
-        params = params or {}
-
-        if image_type == "gradient":
-            direction = params.get("direction", "horizontal")
-            start_color = params.get("start_color", (255, 0, 0))
-            end_color = params.get("end_color", (0, 0, 255))
-
-            img = Image.new("RGB", (width, height))
-            draw = ImageDraw.Draw(img)
-
-            if direction == "horizontal":
-                for x in range(width):
-                    r = int(
-                        start_color[0] + (end_color[0] - start_color[0]) * x / width
-                    )
-                    g = int(
-                        start_color[1] + (end_color[1] - start_color[1]) * x / width
-                    )
-                    b = int(
-                        start_color[2] + (end_color[2] - start_color[2]) * x / width
-                    )
-                    draw.line([(x, 0), (x, height)], fill=(r, g, b))
-            else:
-                for y in range(height):
-                    r = int(
-                        start_color[0] + (end_color[0] - start_color[0]) * y / height
-                    )
-                    g = int(
-                        start_color[1] + (end_color[1] - start_color[1]) * y / height
-                    )
-                    b = int(
-                        start_color[2] + (end_color[2] - start_color[2]) * y / height
-                    )
-                    draw.line([(0, y), (width, y)], fill=(r, g, b))
-
-        elif image_type == "noise":
-            noise_array = np.random.randint(0, 256, (height, width, 3), dtype=np.uint8)
-            img = Image.fromarray(noise_array, "RGB")
-
-        else:
-            return {"error": f"Unsupported image_type {image_type}"}
-
-        result_path = save_image(img)
-        result_base64 = encode_image(result_path)
-        return {"generated_image": result_base64}
-
-    except Exception as e:
-        return {"error": str(e)}
-
+        query: The search query."""
+    search_docs = TavilySearchResults(max_results=3).invoke(query=query)
+    formatted_search_docs = "\n\n---\n\n".join(
+        [
+            f'<Document source="{doc.metadata["source"]}" page="{doc.metadata.get("page", "")}"/>\n{doc.page_content}\n</Document>'
+            for doc in search_docs
+        ])
+    return {"web_results": formatted_search_docs}
 
 @tool
-def combine_images(
-    images_base64: List[str], operation: str, params: Optional[Dict[str, Any]] = None
-) -> Dict[str, Any]:
-    """
-    Combine multiple images (collage, stack, blend).
+def arvix_search(query: str) -> str:
+    """Search Arxiv for a query and return maximum 3 result.
+    
     Args:
-        images_base64 (List[str]): List of base64 images
-        operation (str): Combination type
-        params (Dict[str, Any], optional)
-    Returns:
-        Dictionary with combined image (base64)
-    """
-    try:
-        images = [decode_image(b64) for b64 in images_base64]
-        params = params or {}
-
-        if operation == "stack":
-            direction = params.get("direction", "horizontal")
-            if direction == "horizontal":
-                total_width = sum(img.width for img in images)
-                max_height = max(img.height for img in images)
-                new_img = Image.new("RGB", (total_width, max_height))
-                x = 0
-                for img in images:
-                    new_img.paste(img, (x, 0))
-                    x += img.width
-            else:
-                max_width = max(img.width for img in images)
-                total_height = sum(img.height for img in images)
-                new_img = Image.new("RGB", (max_width, total_height))
-                y = 0
-                for img in images:
-                    new_img.paste(img, (0, y))
-                    y += img.height
-        else:
-            return {"error": f"Unsupported combination operation {operation}"}
-
-        result_path = save_image(new_img)
-        result_base64 = encode_image(result_path)
-        return {"combined_image": result_base64}
+        query: The search query."""
+    search_docs = ArxivLoader(query=query, load_max_docs=3).load()
+    formatted_search_docs = "\n\n---\n\n".join(
+        [
+            f'<Document source="{doc.metadata["source"]}" page="{doc.metadata.get("page", "")}"/>\n{doc.page_content[:1000]}\n</Document>'
+            for doc in search_docs
+        ])
+    return {"arvix_results": formatted_search_docs}
 
-    except Exception as e:
-        return {"error": str(e)}
 
 
 # load the system prompt from the file
 with open("system_prompt.txt", "r", encoding="utf-8") as f:
     system_prompt = f.read()
-print(system_prompt)
 
 # System message
 sys_msg = SystemMessage(content=system_prompt)
 
 # build a retriever
-embeddings = HuggingFaceEmbeddings(
-    model_name="sentence-transformers/all-mpnet-base-v2"
-)  #  dim=768
+embeddings = HuggingFaceEmbeddings(model_name="sentence-transformers/all-mpnet-base-v2") #  dim=768
 supabase: Client = create_client(
-    os.environ.get("SUPABASE_URL"), os.environ.get("SUPABASE_SERVICE_ROLE_KEY")
-)
+    os.environ.get("SUPABASE_URL"), 
+    os.environ.get("SUPABASE_SERVICE_KEY"))
 vector_store = SupabaseVectorStore(
     client=supabase,
-    embedding=embeddings,
-    table_name="documents2",
-    query_name="match_documents_2",
+    embedding= embeddings,
+    table_name="documents",
+    query_name="match_documents_langchain",
 )
 create_retriever_tool = create_retriever_tool(
     retriever=vector_store.as_retriever(),
@@ -680,53 +138,38 @@ create_retriever_tool = create_retriever_tool(
 )
 
 
+
 tools = [
-    web_search,
-    wiki_search,
-    arxiv_search,
     multiply,
     add,
     subtract,
     divide,
     modulus,
-    power,
-    square_root,
-    save_and_read_file,
-    download_file_from_url,
-    extract_text_from_image,
-    analyze_csv_file,
-    analyze_excel_file,
-    execute_code_multilang,
-    analyze_image,
-    transform_image,
-    draw_on_image,
-    generate_simple_image,
-    combine_images,
+    wiki_search,
+    web_search,
+    arvix_search,
 ]
 
-
 # Build graph function
-def build_graph(provider: str = "groq"):
+def build_graph(provider: str = "google"):
     """Build the graph"""
     # Load environment variables from .env file
-    if provider == "groq":
+    if provider == "google":
+        # Google Gemini
+        llm = ChatGoogleGenerativeAI(model="gemini-2.0-flash", temperature=0)
+    elif provider == "groq":
         # Groq https://console.groq.com/docs/models
-        llm = ChatGroq(model="qwen-qwq-32b", temperature=0)
+        llm = ChatGroq(model="qwen-qwq-32b", temperature=0) # optional : qwen-qwq-32b gemma2-9b-it
     elif provider == "huggingface":
         # TODO: Add huggingface endpoint
         llm = ChatHuggingFace(
             llm=HuggingFaceEndpoint(
-                repo_id="TinyLlama/TinyLlama-1.1B-Chat-v1.0",
-                task="text-generation",  # for chat‐style use “text-generation”
-                max_new_tokens=1024,
-                do_sample=False,
-                repetition_penalty=1.03,
+                url="https://api-inference.huggingface.co/models/Meta-DeepLearning/llama-2-7b-chat-hf",
                 temperature=0,
             ),
-            verbose=True,
         )
     else:
-        raise ValueError("Invalid provider. Choose 'groq' or 'huggingface'.")
+        raise ValueError("Invalid provider. Choose 'google', 'groq' or 'huggingface'.")
     # Bind tools to LLM
     llm_with_tools = llm.bind_tools(tools)
 
@@ -734,42 +177,47 @@ def build_graph(provider: str = "groq"):
     def assistant(state: MessagesState):
         """Assistant node"""
         return {"messages": [llm_with_tools.invoke(state["messages"])]}
+    
+    # def retriever(state: MessagesState):
+      #  """Retriever node"""
+       # similar_question = vector_store.similarity_search(state["messages"][0].content)
+        #example_msg = HumanMessage(
+         #   content=f"Here I provide a similar question and answer for reference: \n\n{similar_question[0].page_content}",
+       # )
+       # return {"messages": [sys_msg] + state["messages"] + [example_msg]}
+
+    from langchain_core.messages import AIMessage
 
     def retriever(state: MessagesState):
-        """Retriever node"""
-        similar_question = vector_store.similarity_search(state["messages"][0].content)
+        query = state["messages"][-1].content
+        similar_doc = vector_store.similarity_search(query, k=1)[0]
 
-        if similar_question:  # Check if the list is not empty
-            example_msg = HumanMessage(
-                content=f"Here I provide a similar question and answer for reference: \n\n{similar_question[0].page_content}",
-            )
-            return {"messages": [sys_msg] + state["messages"] + [example_msg]}
+        content = similar_doc.page_content
+        if "Final answer :" in content:
+            answer = content.split("Final answer :")[-1].strip()
         else:
-            # Handle the case when no similar questions are found
-            return {"messages": [sys_msg] + state["messages"]}
+            answer = content.strip()
+
+        return {"messages": [AIMessage(content=answer)]}
+
+   # builder = StateGraph(MessagesState)
+    #builder.add_node("retriever", retriever)
+    #builder.add_node("assistant", assistant)
+    #builder.add_node("tools", ToolNode(tools))
+    #builder.add_edge(START, "retriever")
+    #builder.add_edge("retriever", "assistant")
+    #builder.add_conditional_edges(
+     #   "assistant",
+      #  tools_condition,
+    #)
+    #builder.add_edge("tools", "assistant")
 
     builder = StateGraph(MessagesState)
     builder.add_node("retriever", retriever)
-    builder.add_node("assistant", assistant)
-    builder.add_node("tools", ToolNode(tools))
-    builder.add_edge(START, "retriever")
-    builder.add_edge("retriever", "assistant")
-    builder.add_conditional_edges(
-        "assistant",
-        tools_condition,
-    )
-    builder.add_edge("tools", "assistant")
-
-    # Compile graph
-    return builder.compile()
-
 
-# test
-if __name__ == "__main__":
-    question = "When was a picture of St. Thomas Aquinas first added to the Wikipedia page on the Principle of double effect?"
-    graph = build_graph(provider="groq")
-    messages = [HumanMessage(content=question)]
-    messages = graph.invoke({"messages": messages})
-    for m in messages["messages"]:
-        m.pretty_print()
+    # Retriever ist Start und Endpunkt
+    builder.set_entry_point("retriever")
+    builder.set_finish_point("retriever")
 
+    # Compile graph
+    return builder.compile()