import os
import chainlit as cl
import re
from datetime import datetime
import shutil
import uuid
from qdrant_client import QdrantClient
from qdrant_client.http.models import PointStruct

# Define user roles mapping
USER_ROLES = {
    'moglie@esempio.com': 'business',
    'ingegnere@esempio.com': 'engineering',
    'architetto@esempio.com': 'architecture',
    'admin@esempio.com': 'admin'
}

# Define the path for workspaces
WORKSPACES_DIR = "./workspaces"

def create_workspace(user_role):
    workspace_path = os.path.join(WORKSPACES_DIR, user_role)
    if not os.path.exists(workspace_path):
        os.makedirs(workspace_path)

def save_code_to_file(code, user_role):
    timestamp = datetime.now().strftime("%Y%m%d%H%M%S")
    file_name = f"code_{timestamp}.py"
    file_path = os.path.join(WORKSPACES_DIR, user_role, file_name)
    
    with open(file_path, "w") as file:
        file.write(code)
    
    return file_path

def limit_history(history):
    if len(history) > 20:
        history = history[-20:]
    return history

async def connect_to_qdrant():
    client = QdrantClient("http://qdrant:6333")
    collection_name = "documents"
    
    try:
        client.get_collection(collection_name)
    except Exception as e:
        client.create_collection(
            collection_name=collection_name,
            vectors_config={"size": 768, "distance": "Cosine"}
        )
    
    return client

async def get_embeddings(text):
    import ollama
    client = ollama.Client(os.getenv('OLLAMA_API_BASE', 'http://192.168.1.243:11434'))
    response = client.embed(model='nomic-embed-text', input=text)
    return response['embedding']

@cl.on_chat_start
async def chat_start():
    # Set the user's email to a hardcoded value for testing purposes
    user_email = "admin@esempio.com"
    
    # Determine the user's role based on the email
    user_role = USER_ROLES.get(user_email, 'guest')
    
    # Create workspace directory if it doesn't exist
    create_workspace(user_role)
    
    # Initialize history in the session
    cl.user_session.set("history", [])
    
    # Set the user's role in the session
    cl.user_session.set("role", user_role)
    
    # Send a welcome message based on the user's role
    if user_role == 'admin':
        await cl.Message(content="Welcome, Admin!").send()
    elif user_role == 'engineering':
        await cl.Message(content="Welcome, Engineer!").send()
    elif user_role == 'business':
        await cl.Message(content="Welcome, Business User!").send()
    elif user_role == 'architecture':
        await cl.Message(content="Welcome, Architect!").send()
    else:
        await cl.Message(content="Welcome, Guest!").send()

@cl.on_message
async def message(message):
    # Retrieve the user's role from the session
    user_role = cl.user_session.get("role", 'guest')
    
    if not user_role:
        await cl.Message(content="User role not found").send()
        return
    
    # Initialize the Ollama client using the environment variable
    ollama_api_base = os.getenv('OLLAMA_API_BASE', 'http://192.168.1.243:11434')
    
    try:
        import ollama
        client = ollama.Client(ollama_api_base)
        
        # Retrieve the history from the session and limit it
        history = cl.user_session.get("history", [])
        history = limit_history(history)
        
        # Append the new user message to the history
        history.append({"role": "user", "content": message.content})
        
        # Check if there are any elements in the message
        if message.elements:
            uploaded_files = []
            for element in message.elements:
                try:
                    # Save the content of the file
                    temp_file_path = element.path
                    destination_file_path = os.path.join(WORKSPACES_DIR, user_role, element.name)
                    
                    with open(temp_file_path, 'rb') as src, open(destination_file_path, 'wb') as dst:
                        shutil.copyfileobj(src, dst)
                    
                    uploaded_files.append(element.name)
                except Exception as e:
                    await cl.Message(content=f"Error saving {element.name}: {e}").send()
            
            if uploaded_files:
                await cl.Message(content=f"Files uploaded and saved: {', '.join(uploaded_files)}").send()
        
        # Call the model and get the response
        response = client.chat(model='qwen2.5-coder:7b', messages=history)
        
        # Extract code blocks from the AI response
        code_blocks = re.findall(r"```python(.*?)```", response['message']['content'], re.DOTALL)
        
        elements = []
        if code_blocks:
            for code in code_blocks:
                file_path = save_code_to_file(code, user_role)
                elements.append(cl.File(name=os.path.basename(file_path), path=file_path))
        
        # Append the AI response to the history
        history.append({"role": "assistant", "content": response['message']['content']})
        
        # Save the updated history in the session
        cl.user_session.set("history", history)
        
        # Handle text files and index them in Qdrant
        for element in message.elements:
            if element.name.endswith('.txt'):
                with open(element.path, 'r') as f:
                    content = f.read()
                
                embeddings = await get_embeddings(content)
                
                qdrant_client = await connect_to_qdrant()
                point_id = uuid.uuid4()
                point = PointStruct(id=point_id, vector=embeddings, payload={"file_name": element.name})
                qdrant_client.upsert(collection_name="documents", points=[point])
                
                await cl.Message(content=f"Documento indicizzato con successo su Qdrant.").send()
        
        # Send the final message including both text and files
        await cl.Message(content=response['message']['content'], elements=elements).send()
    except Exception as e:
        await cl.Message(content=f"Error: {e}").send()