import os
import streamlit as st
import requests
import msal
from datetime import datetime, timedelta
import calendar

# Configuration
APPLICATION_ID_KEY = os.getenv('APPLICATION_ID_KEY')
CLIENT_SECRET_KEY = os.getenv('CLIENT_SECRET_KEY')
AUTHORITY_URL = 'https://login.microsoftonline.com/common'
REDIRECT_URI = 'https://huggingface.co/spaces/awacke1/MSGraphAPI'

# Define product to scope mapping and links
PRODUCT_SCOPES = {
    "📧 Outlook": ['Mail.Read', 'Mail.Send', 'Calendars.ReadWrite'],
    "📒 OneNote": ['Notes.Read', 'Notes.Create'],
    "📊 Excel": ['Files.ReadWrite.All'],
    "📄 Word": ['Files.ReadWrite.All'],
    "🗃️ SharePoint": ['Sites.Read.All', 'Sites.ReadWrite.All'],
    "📅 Teams": ['Team.ReadBasic.All', 'Channel.ReadBasic.All'],
    "💬 Viva": ['Analytics.Read'],
    "🚀 Power Platform": ['Flow.Read.All'],
    "🧠 Copilot": ['Cognitive.Read'],
    "🗂️ OneDrive": ['Files.ReadWrite.All'],
    "💡 PowerPoint": ['Files.ReadWrite.All'],
    "📚 Microsoft Bookings": ['Bookings.Read.All', 'Bookings.ReadWrite.All'],
    "📓 Loop": ['Files.ReadWrite.All'],
    "🗣️ Translator": ['Translation.Read'],
    "📋 To Do & Planner": ['Tasks.ReadWrite'],
    "🔗 Azure OpenAI Service": ['AzureAIServices.ReadWrite.All']
}

BASE_SCOPES = ['User.Read']

# MSAL App Instance
def get_msal_app():
    return msal.ConfidentialClientApplication(
        client_id=APPLICATION_ID_KEY,
        client_credential=CLIENT_SECRET_KEY,
        authority=AUTHORITY_URL
    )

# Get Access Token
def get_access_token(code):
    client_instance = get_msal_app()
    try:
        result = client_instance.acquire_token_by_authorization_code(
            code=code,
            scopes=st.session_state.get('request_scopes', BASE_SCOPES),
            redirect_uri=REDIRECT_URI
        )
        if 'access_token' in result:
            return result['access_token']
        else:
            raise Exception(f"Error acquiring token: {result.get('error_description')}")
    except Exception as e:
        st.error(f"Exception in get_access_token: {str(e)}")
        raise

# Make API call
def make_api_call(access_token, endpoint, method='GET', data=None):
    headers = {'Authorization': f'Bearer {access_token}', 'Content-Type': 'application/json'}
    url = f'https://graph.microsoft.com/v1.0/{endpoint}'
    
    if method == 'GET':
        response = requests.get(url, headers=headers)
    elif method == 'POST':
        response = requests.post(url, headers=headers, json=data)
    else:
        raise ValueError(f"Unsupported method: {method}")
    
    if response.status_code in [200, 201]:
        return response.json()
    else:
        st.error(f"API call failed: {response.status_code} - {response.text}")
        return None

# Define product integration handlers
def handle_outlook_integration(access_token):
    st.subheader("📧 Outlook Integration")
    st.markdown(f"[Open Outlook]({PRODUCT_SCOPES['📧 Outlook']['link']})")
    emails = make_api_call(access_token, 'me/messages?$top=10&$orderby=receivedDateTime desc')
    if emails and 'value' in emails:
        for email in emails['value']:
            with st.expander(f"From: {email['from']['emailAddress']['name']} - Subject: {email['subject']}"):
                st.write(f"Received: {email['receivedDateTime']}")
                st.write(f"Body: {email['bodyPreview']}")
    else:
        st.write("No emails found or unable to fetch emails.")

# More handlers for other products like Calendar, OneDrive, etc., go here...

# Main Function
def main():
    st.title("🦄 MS Graph API with AI & Cloud Integration for M365")
    
    # Sidebar product selection
    st.sidebar.title("📝 M365 Products")
    st.sidebar.write("Select products to integrate:")
    
    selected_products = {}
    for product, info in PRODUCT_SCOPES.items():
        selected = st.sidebar.checkbox(product)
        if selected:
            selected_products[product] = True
            st.sidebar.write(f"**AI Capabilities:** {info['ai_capabilities']}")
            st.sidebar.write(f"**Graph API:** {info['graph_api']}")

    # Request scopes based on selected products
    request_scopes = BASE_SCOPES.copy()
    for product in selected_products:
        request_scopes.extend(PRODUCT_SCOPES[product]['scopes'])
    request_scopes = list(set(request_scopes))  # Remove duplicates
    st.session_state['request_scopes'] = request_scopes

    # MSAL login and token handling
    if 'access_token' not in st.session_state:
        client_instance = get_msal_app()
        auth_url = client_instance.get_authorization_request_url(
            scopes=request_scopes,
            redirect_uri=REDIRECT_URI
        )
        st.write(f'👋 Please [click here]({auth_url}) to log in and authorize the app.')
        
        query_params = st.experimental_get_query_params()
        if 'code' in query_params:
            code = query_params.get('code')
            st.write(f'🔑 Authorization Code Obtained: {code[:10]}...')
            
            try:
                access_token = get_access_token(code)
                st.session_state['access_token'] = access_token
                st.success("Access token acquired successfully!")
                st.rerun()
            except Exception as e:
                st.error(f"Error acquiring access token: {str(e)}")
                st.stop()
    else:
        access_token = st.session_state['access_token']
        
        user_info = make_api_call(access_token, 'me')
        if user_info:
            st.sidebar.write(f"👋 Hello, {user_info.get('displayName', 'User')}!")
        
        if selected_products:
            # Integrate selected products
            for product in selected_products:
                if product == "📧 Outlook":
                    handle_outlook_integration(access_token)
                # Add other product integration handlers as needed
        else:
            st.write("No products selected. Please select products from the sidebar.")

    # Sidebar navigation menu
    st.sidebar.title("Navigation")
    menu = st.sidebar.radio("Go to", [
        "1️⃣ Dashboard",
        "🏠 Landing Page",
        "📅 Upcoming Events",
        "📆 Schedule",
        "📝 Agenda",
        "🔍 Event Details",
        "➕ Add Event",
        "🔎 Filter By"
    ])

if __name__ == "__main__":
    main()