# # Shiva
# from flask import Flask, render_template, request, jsonify, session
# import os
# from dotenv import load_dotenv
# import json
# import random
# from werkzeug.utils import secure_filename
# import google.generativeai as genai
# from pathlib import Path

# # Load environment variables
# load_dotenv()

# app = Flask(__name__)
# app.config['SECRET_KEY'] = os.getenv('FLASK_SECRET_KEY', 'dev-secret-key')
# app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024  # 16MB max file size

# # Configure upload settings
# UPLOAD_FOLDER = 'uploads'
# ALLOWED_EXTENSIONS = {'txt', 'pdf', 'docx', 'doc', 'json', 'csv'}
# app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER

# # Create upload directory
# os.makedirs(UPLOAD_FOLDER, exist_ok=True)

# # Configure Gemini API
# GEMINI_API_KEY = os.getenv('GEMINI_API_KEY')
# if GEMINI_API_KEY:
#     genai.configure(api_key=GEMINI_API_KEY)
#     model = genai.GenerativeModel('gemini-1.5-pro')
#     print("✅ Gemini API configured successfully!")
# else:
#     model = None
#     print("⚠️ No Gemini API key found. Using fallback responses.")

# # Import agents and utilities
# from agents.router_agent import RouterAgent
# from utils.helpers import load_quotes, get_greeting
# from utils.file_processor import FileProcessor

# def allowed_file(filename):
#     return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS

# class MyPharmaAI:
#     def __init__(self):
#         self.router = RouterAgent(model)  # Pass model to router
#         self.quotes = load_quotes()
#         self.file_processor = FileProcessor()
        
#     def process_query(self, query, user_name="Student", uploaded_files=None):
#         """Process user query through the router agent with optional file context"""
#         try:
#             # Check if we have uploaded files to reference
#             file_context = ""
#             if uploaded_files and 'uploaded_files' in session:
#                 file_context = self.get_file_context(session['uploaded_files'])
            
#             # Route the query to appropriate agent
#             response = self.router.route_query(query, file_context)
#             return {
#                 'success': True,
#                 'response': response,
#                 'agent_used': response.get('agent_type', 'unknown')
#             }
#         except Exception as e:
#             return {
#                 'success': False,
#                 'response': f"माफ करें (Sorry), I encountered an error: {str(e)}",
#                 'agent_used': 'error'
#             }
    
#     def get_file_context(self, uploaded_files):
#         """Get context from uploaded files"""
#         context = ""
#         for file_info in uploaded_files[-3:]:  # Last 3 files only
#             file_path = file_info['path']
#             if os.path.exists(file_path):
#                 try:
#                     content = self.file_processor.extract_text(file_path)
#                     if content:
#                         context += f"\n\n📄 Content from {file_info['original_name']}:\n{content[:2000]}..."  # Limit context
#                 except Exception as e:
#                     context += f"\n\n❌ Error reading {file_info['original_name']}: {str(e)}"
#         return context
    
#     def get_daily_quote(self):
#         """Get inspirational quote from Gita/Vedas"""
#         return random.choice(self.quotes) if self.quotes else "विद्या धनं सर्व धन प्रधानम्"
    
#     def process_file_upload(self, file):
#         """Process uploaded file and extract information"""
#         try:
#             if file and allowed_file(file.filename):
#                 filename = secure_filename(file.filename)
#                 timestamp = str(int(time.time()))
#                 filename = f"{timestamp}_{filename}"
#                 file_path = os.path.join(app.config['UPLOAD_FOLDER'], filename)
#                 file.save(file_path)
                
#                 # Extract text content
#                 content = self.file_processor.extract_text(file_path)
                
#                 # Store in session
#                 if 'uploaded_files' not in session:
#                     session['uploaded_files'] = []
                
#                 file_info = {
#                     'original_name': file.filename,
#                     'saved_name': filename,
#                     'path': file_path,
#                     'size': os.path.getsize(file_path),
#                     'preview': content[:500] if content else "No text content extracted"
#                 }
                
#                 session['uploaded_files'].append(file_info)
#                 session.modified = True
                
#                 return {
#                     'success': True,
#                     'message': f'File "{file.filename}" uploaded successfully! You can now ask questions about its content.',
#                     'file_info': file_info
#                 }
#             else:
#                 return {
#                     'success': False,
#                     'message': 'Invalid file type. Supported: TXT, PDF, DOCX, DOC, JSON, CSV'
#                 }
#         except Exception as e:
#             return {
#                 'success': False,
#                 'message': f'Error uploading file: {str(e)}'
#             }

# # Initialize the AI system
# import time
# pharma_ai = MyPharmaAI()

# @app.route('/')
# def index():
#     """Main chat interface"""
#     greeting = get_greeting()
#     daily_quote = pharma_ai.get_daily_quote()
    
#     # Get uploaded files info
#     uploaded_files = session.get('uploaded_files', [])
    
#     return render_template('index.html', 
#                          greeting=greeting, 
#                          daily_quote=daily_quote,
#                          uploaded_files=uploaded_files,
#                          api_available=bool(GEMINI_API_KEY))

# @app.route('/chat', methods=['POST'])
# def chat():
#     """Main chat endpoint"""
#     try:
#         data = request.get_json()
        
#         if not data or 'query' not in data:
#             return jsonify({
#                 'success': False,
#                 'error': 'No query provided'
#             }), 400
        
#         user_query = data.get('query', '').strip()
#         user_name = data.get('user_name', 'Student')
        
#         if not user_query:
#             return jsonify({
#                 'success': False,
#                 'error': 'Empty query'
#             }), 400
        
#         # Process the query (with file context if available)
#         result = pharma_ai.process_query(user_query, user_name, session.get('uploaded_files'))
        
#         return jsonify(result)
        
#     except Exception as e:
#         return jsonify({
#             'success': False,
#             'error': f'Server error: {str(e)}'
#         }), 500

# @app.route('/upload', methods=['POST'])
# def upload_file():
#     """Handle file upload"""
#     try:
#         if 'file' not in request.files:
#             return jsonify({
#                 'success': False,
#                 'error': 'No file provided'
#             }), 400
        
#         file = request.files['file']
        
#         if file.filename == '':
#             return jsonify({
#                 'success': False,
#                 'error': 'No file selected'
#             }), 400
        
#         result = pharma_ai.process_file_upload(file)
#         return jsonify(result)
        
#     except Exception as e:
#         return jsonify({
#             'success': False,
#             'error': f'Upload error: {str(e)}'
#         }), 500

# @app.route('/files')
# def get_uploaded_files():
#     """Get list of uploaded files"""
#     uploaded_files = session.get('uploaded_files', [])
#     return jsonify({
#         'files': uploaded_files,
#         'count': len(uploaded_files)
#     })

# @app.route('/clear_files', methods=['POST'])
# def clear_files():
#     """Clear uploaded files"""
#     try:
#         # Remove files from disk
#         if 'uploaded_files' in session:
#             for file_info in session['uploaded_files']:
#                 file_path = file_info['path']
#                 if os.path.exists(file_path):
#                     os.remove(file_path)
        
#         # Clear session
#         session.pop('uploaded_files', None)
        
#         return jsonify({
#             'success': True,
#             'message': 'All files cleared successfully'
#         })
#     except Exception as e:
#         return jsonify({
#             'success': False,
#             'error': f'Error clearing files: {str(e)}'
#         }), 500

# @app.route('/quote')
# def get_quote():
#     """Get a random inspirational quote"""
#     quote = pharma_ai.get_daily_quote()
#     return jsonify({'quote': quote})

# @app.route('/health')
# def health_check():
#     """Health check endpoint"""
#     return jsonify({
#         'status': 'healthy',
#         'app': 'MyPharma AI',
#         'version': '2.0.0',
#         'gemini_api': 'connected' if GEMINI_API_KEY else 'not configured',
#         'features': ['chat', 'file_upload', 'multi_agent', 'indian_theme']
#     })

# if __name__ == '__main__':
#     # Create necessary directories
#     for directory in ['data', 'static/css', 'static/js', 'templates', 'agents', 'utils', 'uploads']:
#         os.makedirs(directory, exist_ok=True)
    
#     print("🇮🇳 MyPharma AI Starting...")
#     print(f"📁 Upload folder: {UPLOAD_FOLDER}")
#     print(f"🤖 Gemini API: {'✅ Ready' if GEMINI_API_KEY else '❌ Not configured'}")
#     print("🚀 Server starting on http://localhost:5000")
    
#     # Run the app
#     app.run(debug=True, port=5000)
# # #### app.py (Main Application)
# # from flask import Flask, render_template, request, jsonify
# # import os
# # from dotenv import load_dotenv
# # import json
# # import random

# # # Load environment variables
# # load_dotenv()

# # app = Flask(__name__)
# # app.config['SECRET_KEY'] = os.getenv('FLASK_SECRET_KEY', 'dev-secret-key')

# # # Import agents
# # from agents.router_agent import RouterAgent
# # from utils.helpers import load_quotes, get_greeting

# # class MyPharmaAI:
# #     def __init__(self):
# #         self.router = RouterAgent()
# #         self.quotes = load_quotes()
        
# #     def process_query(self, query, user_name="Student"):
# #         """Process user query through the router agent"""
# #         try:
# #             # Route the query to appropriate agent
# #             response = self.router.route_query(query)
# #             return {
# #                 'success': True,
# #                 'response': response,
# #                 'agent_used': response.get('agent_type', 'unknown')
# #             }
# #         except Exception as e:
# #             return {
# #                 'success': False,
# #                 'response': f"माफ करें (Sorry), I encountered an error: {str(e)}",
# #                 'agent_used': 'error'
# #             }
    
# #     def get_daily_quote(self):
# #         """Get inspirational quote from Gita/Vedas"""
# #         return random.choice(self.quotes) if self.quotes else "विद्या धनं सर्व धन प्रधानम्"

# # # Initialize the AI system
# # pharma_ai = MyPharmaAI()

# # @app.route('/')
# # def index():
# #     """Main chat interface"""
# #     greeting = get_greeting()
# #     daily_quote = pharma_ai.get_daily_quote()
# #     return render_template('index.html', 
# #                          greeting=greeting, 
# #                          daily_quote=daily_quote)

# # @app.route('/chat', methods=['POST'])
# # def chat():
# #     """Main chat endpoint"""
# #     try:
# #         data = request.get_json()
        
# #         if not data or 'query' not in data:
# #             return jsonify({
# #                 'success': False,
# #                 'error': 'No query provided'
# #             }), 400
        
# #         user_query = data.get('query', '').strip()
# #         user_name = data.get('user_name', 'Student')
        
# #         if not user_query:
# #             return jsonify({
# #                 'success': False,
# #                 'error': 'Empty query'
# #             }), 400
        
# #         # Process the query
# #         result = pharma_ai.process_query(user_query, user_name)
        
# #         return jsonify(result)
        
# #     except Exception as e:
# #         return jsonify({
# #             'success': False,
# #             'error': f'Server error: {str(e)}'
# #         }), 500

# # @app.route('/quote')
# # def get_quote():
# #     """Get a random inspirational quote"""
# #     quote = pharma_ai.get_daily_quote()
# #     return jsonify({'quote': quote})

# # @app.route('/health')
# # def health_check():
# #     """Health check endpoint"""
# #     return jsonify({
# #         'status': 'healthy',
# #         'app': 'MyPharma AI',
# #         'version': '1.0.0'
# #     })

# # if __name__ == '__main__':
# #     # Create data directories if they don't exist
# #     os.makedirs('data', exist_ok=True)
# #     os.makedirs('static/css', exist_ok=True)
# #     os.makedirs('static/js', exist_ok=True)
# #     os.makedirs('templates', exist_ok=True)
# #     os.makedirs('agents', exist_ok=True)
# #     os.makedirs('utils', exist_ok=True)
    
# #     # Run the app
# #     app.run(debug=True, port=5000)

# app.py
# Main Flask application for MyPharma AI

from flask import Flask, render_template, request, jsonify, session
import os
import json
import random
import time
from dotenv import load_dotenv
from werkzeug.utils import secure_filename
import google.generativeai as genai

# Load environment variables from a .env file
load_dotenv()

# --- App Configuration ---
app = Flask(__name__)
app.config['SECRET_KEY'] = os.getenv('FLASK_SECRET_KEY', 'a-very-secret-key-for-dev')
app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024  # 16MB max file size

# --- Upload Configuration ---
UPLOAD_FOLDER = '/tmp/uploads'
ALLOWED_EXTENSIONS = {'txt', 'pdf', 'docx', 'json', 'csv'}
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
os.makedirs(UPLOAD_FOLDER, exist_ok=True)

# --- Gemini API Configuration ---
GEMINI_API_KEY = os.getenv('GEMINI_API_KEY')
model = None
if GEMINI_API_KEY:
    try:
        genai.configure(api_key=GEMINI_API_KEY)
        # Using gemini-1.5-flash for speed and cost-effectiveness
        model = genai.GenerativeModel('gemini-1.5-flash')
        print("✅ Gemini 1.5 Flash Model configured successfully!")
    except Exception as e:
        print(f"❌ Error configuring Gemini API: {e}")
else:
    print("⚠️ No Gemini API key found. AI features will be disabled.")

# --- Import Agents and Utilities ---
# (Ensure these files exist in their respective directories)
from agents.router_agent import RouterAgent
from utils.helpers import load_quotes, get_greeting
from utils.file_processor import FileProcessor

def allowed_file(filename):
    """Check if the uploaded file has an allowed extension."""
    return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS

# --- Main AI Application Class ---
class MyPharmaAI:
    """Orchestrator for the entire AI system."""
    def __init__(self):
        self.router = RouterAgent(model)  # The router now gets the configured model
        self.quotes = load_quotes()
        self.file_processor = FileProcessor()

    def process_query(self, query, user_name="Student", viva_state=None, uploaded_files=None,chat_history=None):
        """Routes a user's query to the appropriate agent, handling context."""
        try:
            file_context = ""
            if uploaded_files:
                file_context = self.get_file_context(uploaded_files)
            
            # --- ADD THIS LINE FOR DEBUGGING ---
            print(f"--- DEBUG: Here is the text extracted from the file ---\n{file_context[:1000]}\n--- END DEBUG ---")
            
            # Pass all context to the router
            response_data = self.router.route_query(query, file_context, viva_state, chat_history)
            
            return {
                'success': True,
                **response_data # Unpack the dictionary from the agent
            }
        except Exception as e:
            print(f"Error in MyPharmaAI.process_query: {e}")
            return {
                'success': False,
                'message': f"माफ करें (Sorry), a critical error occurred: {str(e)}",
                'agent_used': 'error'
            }

    def get_file_context(self, uploaded_files_session):
        """Extracts text from the most recent files to use as context."""
        context = ""
        # Limit context to the last 3 uploaded files to manage token size
        for file_info in uploaded_files_session[-3:]:
            file_path = file_info.get('path')
            if file_path and os.path.exists(file_path):
                try:
                    content = self.file_processor.extract_text(file_path)
                    if content:
                        # Limit context from each file to 2000 characters
                        context += f"\n\n--- Content from {file_info['original_name']} ---\n{content[:2000]}..."
                except Exception as e:
                    context += f"\n\n--- Error reading {file_info['original_name']}: {str(e)} ---"
        return context

    def get_daily_quote(self):
        """Returns a random quote."""
        return random.choice(self.quotes) if self.quotes else "विद्या धनं सर्व धन प्रधानम्"

# Initialize the AI system
pharma_ai = MyPharmaAI()

# --- Flask Routes ---

@app.route('/')
def index():
    """Renders the main chat interface."""
    greeting = get_greeting()
    daily_quote = pharma_ai.get_daily_quote()
    uploaded_files = session.get('uploaded_files', [])
    return render_template('index.html', 
                           greeting=greeting, 
                           daily_quote=daily_quote,
                           uploaded_files=uploaded_files)

@app.route('/chat', methods=['POST'])
def chat():
    """Handles the main chat logic, including session management for the Viva Agent."""
    try:
        data = request.get_json()
        query = data.get('query', '').strip()
        if not query:
            return jsonify({'success': False, 'error': 'Empty query'}), 400
        
         # --- HISTORY MANAGEMENT START ---

        # Get the conversation history from the session (or start a new one)
        chat_history = session.get('chat_history', [])

        # Get current viva state from session for the Viva Agent
        viva_state = session.get('viva_state', None)
        uploaded_files = session.get('uploaded_files', None)

        # Process the query through the main orchestrator
        result = pharma_ai.process_query(query, viva_state=viva_state, uploaded_files=uploaded_files,chathistory=chat_history)
        # If the query was successful, update the history
        if result.get('success'):
            # Add the user's query and the AI's message to the history
            chat_history.append({'role': 'user', 'parts': [query]})
            chat_history.append({'role': 'model', 'parts': [result.get('message', '')]})

            # Keep the history from getting too long (e.g., last 10 exchanges)
            session['chat_history'] = chat_history[-20:]

        # --- HISTORY MANAGEMENT END ---

        # If the Viva agent returns an updated state, save it to the session
        if 'viva_state' in result:
            session['viva_state'] = result.get('viva_state')
        
        return jsonify(result)
        
    except Exception as e:
        print(f"Error in /chat endpoint: {e}")
        return jsonify({'success': False, 'error': f'Server error: {str(e)}'}), 500

@app.route('/upload', methods=['POST'])
def upload_file():
    """Handles file uploads."""
    if 'file' not in request.files:
        return jsonify({'success': False, 'error': 'No file part'}), 400
    file = request.files['file']
    if file.filename == '':
        return jsonify({'success': False, 'error': 'No selected file'}), 400
    if file and allowed_file(file.filename):
        filename = secure_filename(file.filename)
        file_path = os.path.join(app.config['UPLOAD_FOLDER'], filename)
        file.save(file_path)

        if 'uploaded_files' not in session:
            session['uploaded_files'] = []
        
        file_info = {'original_name': filename, 'path': file_path}
        session['uploaded_files'].append(file_info)
        session.modified = True

        return jsonify({
            'success': True, 
            'message': f'File "{filename}" uploaded. You can now ask questions about it.',
            'files': session['uploaded_files']
        })
    return jsonify({'success': False, 'error': 'File type not allowed'}), 400

@app.route('/files', methods=['GET'])
def get_uploaded_files():
    """Returns the list of uploaded files from the session."""
    return jsonify({'files': session.get('uploaded_files', [])})

@app.route('/clear_files', methods=['POST'])
def clear_files():
    """Deletes uploaded files from disk and clears them from the session."""
    if 'uploaded_files' in session:
        for file_info in session['uploaded_files']:
            if os.path.exists(file_info['path']):
                os.remove(file_info['path'])
    session.pop('uploaded_files', None)
    session.pop('viva_state', None) # Also clear viva state
    return jsonify({'success': True, 'message': 'All files and sessions cleared.'})

@app.route('/quote')
def get_quote():
    """Returns a new random quote."""
    return jsonify({'quote': pharma_ai.get_daily_quote()})

# --- Main Execution ---
# if __name__ == '__main__':
#     # Ensure all necessary directories exist
#     for directory in ['data', 'static/css', 'static/js', 'templates', 'agents', 'utils', 'uploads']:
#         os.makedirs(directory, exist_ok=True)
    
#     print("🇮🇳 MyPharma AI Starting...")
#     print(f"🤖 Gemini API Status: {'✅ Ready' if model else '❌ Not configured'}")
#     print("🚀 Server starting on http://127.0.0.1:5000")
#     app.run(debug=True, port=5000)
if __name__ == '__main__':
    # Create necessary directories (this is good practice)
    for directory in ['data', 'uploads', 'templates']:
        os.makedirs(directory, exist_ok=True)
    
    # Get port from environment variable, defaulting to 5000 for local testing
    port = int(os.environ.get('PORT', 7860))
    
    print("🇮🇳 MyPharma AI Starting...")
    print(f"🤖 Gemini API Status: {'✅ Ready' if model else '❌ Not configured'}")
    print(f"🚀 Server starting on http://0.0.0.0:{port}")
    
    # Run the app to be accessible on the server
    app.run(host='0.0.0.0', port=port)