import streamlit as st
import requests
import datetime
from pymongo import MongoClient
from streamlit_cookies_manager import CookieManager

# Inject the scroll control HTML/JS
def load_html(file_name):
    with open(file_name, 'r', encoding='utf-8') as file:
        return file.read()

# Load the scroll controls
st.markdown(load_html("control.html"), unsafe_allow_html=True)

# Initialize the Cookie Manager (no encryption)
cookies = CookieManager(prefix="ktosiek/streamlit-cookies-manager/")
if not cookies.ready():
    st.stop()

# Connect to MongoDB
client = MongoClient("mongodb://localhost:27017/")  # Adjust your MongoDB connection URI
db = client["chatbot_db"]  # Database name
users_collection = db["users"]  # Collection to store user data

# Generate a user ID and store it in cookies if not already set
if 'user_id' not in cookies:
    cookies['user_id'] = str(datetime.datetime.now().timestamp())  # Use timestamp as a unique ID
    cookies.save()

user_id = cookies.get('user_id')
# st.write(f"Current User ID: {user_id}")

# Check if the user exists in the database
user_data = users_collection.find_one({"user_id": user_id})

# If user doesn't exist, create a new entry with the current timestamp and empty chat history
if not user_data:
    timestamp = str(datetime.datetime.now().isoformat())  # Unique timestamp for each user
    users_collection.insert_one({
        "user_id": user_id,
        "timestamp": timestamp,
        "messages": []  # Empty chat history
    })
    st.write("New user detected! Created user entry in the database.")
else:
    # If user exists, load the chat history from the database
    st.session_state.messages = user_data["messages"]
    # st.write("Returning user detected! Loaded chat history from the database.")

# Function to send POST request to a local server
def send_post_request(prompt):
    url = "http://localhost:19194/"  # Update this to your actual server URL
    payload = prompt.title()
    response = requests.post(url, json=payload)
    return response.text

# Custom CSS to fix the input box at the bottom of the page
st.markdown(
    """
    <style>
    .fixed-input-container {
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background-color: #f9f9f9;
        padding: 10px;
        box-shadow: 0px -2px 10px rgba(0, 0, 0, 0.1);
        z-index: 999;
    }
    .input-container input {
        width: 80%;
        padding: 10px;
        font-size: 16px;
        border-radius: 5px;
        border: 1px solid #ccc;
        margin-right: 10px;
    }
    .input-container button {
        padding: 10px 20px;
        font-size: 16px;
        border: none;
        background-color: #4CAF50;
        color: white;
        border-radius: 5px;
        cursor: pointer;
    }
    .input-container button:hover {
        background-color: #45a049;
    }
    .prompt-history {
        margin-bottom: 120px; /* Space to ensure prompt history doesn't overlap input box */
    }
    </style>
    """,
    unsafe_allow_html=True
)

st.title('Ask Maargdarshak')

if 'messages' not in st.session_state:
    st.session_state.messages = []

# Load chat history from session state
for message in st.session_state.messages:
    st.chat_message(message['role']).markdown(message['content'])

# Prompt input
prompt = st.chat_input("Ask your question here")

if prompt:
    # Display the user prompt in the chat UI
    st.chat_message('user').markdown(prompt)
    st.session_state.messages.append({'role': 'user', 'content': prompt})

    # Get the bot's response via a POST request
    response = send_post_request(prompt)

    # Display the bot's response in the chat UI
    st.chat_message('bot').markdown(response)
    st.session_state.messages.append({'role': 'bot', 'content': response})

    # Update the user's chat history in the database
    users_collection.update_one(
        {"user_id": user_id},
        {"$push": {"messages": {'role': 'user', 'content': prompt}}},
    )
    users_collection.update_one(
        {"user_id": user_id},
        {"$push": {"messages": {'role': 'bot', 'content': response}}},
    )

    # Save updated history to cookies (optional, MongoDB handles persistence)
    cookies['history'] = st.session_state.messages
    cookies.save()