import os
import tempfile

# Fix HuggingFace cache directory issue for HuggingFace Spaces
# Set cache directories to writable temporary directories
os.environ['TRANSFORMERS_CACHE'] = tempfile.mkdtemp()
os.environ['HF_HOME'] = tempfile.mkdtemp()
os.environ['SENTENCE_TRANSFORMERS_HOME'] = tempfile.mkdtemp()

import pandas as pd
import plotly.express as px
import plotly.graph_objects as go
from typing import List, Tuple, Dict, Optional
from langchain.schema import Document
import re
import json
import warnings
warnings.filterwarnings('ignore')

# Import vector store components with better error handling
try:
    import chromadb
    from chromadb.config import Settings
    from sentence_transformers import SentenceTransformer
    VECTOR_STORE_AVAILABLE = True
    print("✅ ChromaDB and SentenceTransformers imported successfully")
except ImportError as e:
    VECTOR_STORE_AVAILABLE = False
    print(f"⚠️ Vector store import error: {e}")
except Exception as e:
    VECTOR_STORE_AVAILABLE = False
    print(f"⚠️ Vector store initialization error: {e}")

# Import LLM components
try:
    import openai
    LLM_AVAILABLE = bool(os.getenv("OPENAI_API_KEY"))
    if LLM_AVAILABLE:
        openai.api_key = os.getenv("OPENAI_API_KEY")
        print("✅ OpenAI API key found and configured")
    else:
        print("⚠️ OpenAI API key not found in environment")
except ImportError:
    LLM_AVAILABLE = False
    print("⚠️ OpenAI library not available")

# Import our custom modules
from document_processor import DocumentProcessor
from auth_system import AuthSystem

class EnhancedRAGSystem:
    """Complete RAG system with Vector Store, LLM, and RBAC enforcement"""
    
    def __init__(self):
        self.document_processor = DocumentProcessor()
        self.auth_system = AuthSystem()
        self.documents = []
        self.initialized = False
        self.query_feedback = {}
        
        # Vector Store Components
        self.chroma_client = None
        self.collection = None
        self.embedding_model = None
        self.vector_store_initialized = False
        
        # LLM Components
        self.llm_client = None
        self.llm_model = "gpt-3.5-turbo"
        self.llm_initialized = False
        
        # Intent classification keywords
        self.intent_keywords = {
            "finance": ["revenue", "profit", "cost", "budget", "financial", "expense", "income", "cash", "margin", "roi", "sales"],
            "marketing": ["campaign", "customer", "acquisition", "brand", "marketing", "advertising", "engagement", "conversion", "retention"],
            "hr": ["employee", "hr", "policy", "leave", "benefits", "salary", "attendance", "performance", "training", "recruitment"],
            "engineering": ["architecture", "technology", "system", "development", "technical", "infrastructure", "deployment", "security", "api"],
            "general": ["company", "about", "overview", "mission", "values", "policy", "contact", "help"]
        }
    
    def initialize_system(self):
        """Initialize the complete RAG system with all components"""
        try:
            print("🚀 Initializing Complete RAG System...")
            
            # Initialize Vector Store (ChromaDB)
            self._initialize_vector_store()
            
            # Initialize LLM
            self._initialize_llm()
            
            # Load documents
            self.documents = self.document_processor.get_all_documents()
            
            # Load documents into vector store if available
            if self.vector_store_initialized:
                self._load_documents_to_vector_store()
            
            self.initialized = True
            
            # Print initialization status
            self._print_initialization_status()
            
        except Exception as e:
            print(f"❌ Error initializing RAG system: {str(e)}")
            # Graceful fallback to template-based system
            self.initialized = True
            print("⚠️ Using fallback mode with template responses")
    
    def _initialize_vector_store(self):
        """Initialize ChromaDB vector store with better error handling"""
        if not VECTOR_STORE_AVAILABLE:
            print("⚠️ ChromaDB/SentenceTransformers not available, using in-memory search")
            return
        
        try:
            print("🔧 Initializing ChromaDB...")
            
            # Create a writable directory for ChromaDB
            chroma_dir = tempfile.mkdtemp(prefix="chroma_")
            print(f"📁 Using ChromaDB directory: {chroma_dir}")
            
            # Try different ChromaDB configurations for HuggingFace compatibility
            try:
                # First try: PersistentClient (newer API)
                self.chroma_client = chromadb.PersistentClient(path=chroma_dir)
                print("✅ Using ChromaDB PersistentClient")
            except Exception as e1:
                try:
                    # Second try: Client with settings (older API)
                    self.chroma_client = chromadb.Client(Settings(
                        chroma_db_impl="duckdb+parquet",
                        persist_directory=chroma_dir
                    ))
                    print("✅ Using ChromaDB Client with Settings")
                except Exception as e2:
                    # Third try: Simple client
                    self.chroma_client = chromadb.Client()
                    print("✅ Using ChromaDB in-memory client")
            
            # Get or create collection
            collection_name = "finsolve_documents"
            try:
                self.collection = self.chroma_client.get_collection(collection_name)
                print(f"✅ Loaded existing ChromaDB collection: {collection_name}")
            except:
                self.collection = self.chroma_client.create_collection(
                    name=collection_name,
                    metadata={"description": "FinSolve documents with RBAC"}
                )
                print(f"✅ Created new ChromaDB collection: {collection_name}")
            
            # Initialize embedding model with smaller model for HuggingFace
            try:
                # Set cache directory for sentence transformers
                cache_dir = tempfile.mkdtemp(prefix="sentence_transformers_")
                
                self.embedding_model = SentenceTransformer(
                    "all-MiniLM-L6-v2", 
                    cache_folder=cache_dir
                )
                print("✅ Loaded sentence transformer model: all-MiniLM-L6-v2")
            except Exception as e:
                # Fallback to even smaller model
                try:
                    cache_dir = tempfile.mkdtemp(prefix="sentence_transformers_fallback_")
                    self.embedding_model = SentenceTransformer(
                        "paraphrase-MiniLM-L3-v2",
                        cache_folder=cache_dir
                    )
                    print("✅ Loaded fallback sentence transformer model: paraphrase-MiniLM-L3-v2")
                except Exception as e2:
                    print(f"❌ Failed to load embedding model: {e2}")
                    raise e2
            
            self.vector_store_initialized = True
            
        except Exception as e:
            print(f"⚠️ ChromaDB initialization failed: {str(e)}")
            print("⚠️ Falling back to in-memory search")
            self.vector_store_initialized = False
    
    def _initialize_llm(self):
        """Initialize OpenAI LLM"""
        if not LLM_AVAILABLE:
            print("⚠️ OpenAI API key not found, using template responses")
            return
        
        try:
            # Test OpenAI connection with updated API
            response = openai.ChatCompletion.create(
                model=self.llm_model,
                messages=[{"role": "user", "content": "Hello"}],
                max_tokens=10
            )
            
            self.llm_client = openai
            self.llm_initialized = True
            print(f"✅ OpenAI LLM initialized: {self.llm_model}")
            
        except Exception as e:
            print(f"⚠️ OpenAI initialization failed: {str(e)}")
            print("⚠️ Using template-based responses")
    
    def _load_documents_to_vector_store(self):
        """Load documents into ChromaDB vector store"""
        if not self.vector_store_initialized or not self.embedding_model:
            return
        
        try:
            # Check if documents already loaded
            if self.collection.count() > 0:
                print(f"✅ ChromaDB already contains {self.collection.count()} documents")
                return
            
            print("📄 Loading documents into vector store...")
            
            texts = []
            metadatas = []
            ids = []
            
            for i, doc in enumerate(self.documents):
                doc_id = f"doc_{i}_{hash(doc.page_content) % 10000}"
                
                metadata = {
                    "content_type": doc.metadata.get("content_type", "general"),
                    "title": doc.metadata.get("title", "Document"),
                    "department": doc.metadata.get("department", "General"),
                    "type": doc.metadata.get("type", "Document"),
                    "chunk_id": str(doc.metadata.get("chunk_id", 0)),
                    "source": doc.metadata.get("source", "unknown")
                }
                
                texts.append(doc.page_content)
                metadatas.append(metadata)
                ids.append(doc_id)
            
            # Generate embeddings in batches to avoid memory issues
            batch_size = 10
            for i in range(0, len(texts), batch_size):
                batch_texts = texts[i:i+batch_size]
                batch_metadatas = metadatas[i:i+batch_size] 
                batch_ids = ids[i:i+batch_size]
                
                # Generate embeddings
                embeddings = self.embedding_model.encode(batch_texts).tolist()
                
                # Add to ChromaDB
                self.collection.add(
                    embeddings=embeddings,
                    documents=batch_texts,
                    metadatas=batch_metadatas,
                    ids=batch_ids
                )
            
            print(f"✅ Loaded {len(self.documents)} documents into ChromaDB")
            
        except Exception as e:
            print(f"⚠️ Error loading documents to vector store: {str(e)}")
    
    def _print_initialization_status(self):
        """Print comprehensive initialization status"""
        print("\n" + "="*50)
        print("🤖 FINSOLVE RAG SYSTEM STATUS")
        print("="*50)
        print(f"✅ Python: Core system initialized")
        print(f"{'✅' if self.vector_store_initialized else '⚠️'} ChromaDB Vector Store: {'Ready' if self.vector_store_initialized else 'Fallback mode'}")
        print(f"{'✅' if self.llm_initialized else '⚠️'} OpenAI LLM: {'OpenAI GPT' if self.llm_initialized else 'Template mode'}")
        print(f"✅ Streamlit: UI active")
        print(f"🔄 FastAPI: {'Real FastAPI' if self._check_fastapi_running() else 'Simulated API'}")
        print(f"✅ Authentication: JWT-style RBAC")
        print(f"✅ NLP: Intent classification + {'LLM' if self.llm_initialized else 'Templates'}")
        print(f"✅ RAG: Vector retrieval + context augmentation")
        print(f"📊 Documents loaded: {len(self.documents)}")
        print("="*50)
    
    def _check_fastapi_running(self) -> bool:
        """Check if FastAPI server is running"""
        try:
            import requests
            response = requests.get("http://localhost:8000/health", timeout=2)
            return response.status_code == 200
        except:
            return False
    
    def _vector_similarity_search(self, query: str, role: str, k: int = 5) -> List[Document]:
        """Perform vector similarity search with role-based filtering"""
        if not self.vector_store_initialized:
            return self._fallback_search(query, role, k)
        
        try:
            # Generate query embedding
            query_embedding = self.embedding_model.encode([query]).tolist()[0]
            
            # Build role-based filter
            where_clause = self._build_role_filter(role)
            
            # Perform vector search
            results = self.collection.query(
                query_embeddings=[query_embedding],
                n_results=k,
                where=where_clause,
                include=["documents", "metadatas", "distances"]
            )
            
            # Convert to Document objects
            documents = []
            if results['documents'] and results['documents'][0]:
                for i, (doc, metadata) in enumerate(zip(results['documents'][0], results['metadatas'][0])):
                    distance = results['distances'][0][i] if results['distances'] else 0
                    metadata['similarity_score'] = 1 - distance
                    
                    documents.append(Document(
                        page_content=doc,
                        metadata=metadata
                    ))
            
            return documents
            
        except Exception as e:
            print(f"❌ Vector search error: {str(e)}")
            return self._fallback_search(query, role, k)
    
    def _build_role_filter(self, role: str) -> Dict:
        """Build ChromaDB filter based on user role"""
        role_access = {
            "Finance": ["financial_reports", "expense_data", "budget_info"],
            "Marketing": ["marketing_reports", "campaign_data", "customer_metrics"],
            "HR": ["employee_data", "hr_policies", "attendance_records"],
            "Engineering": ["technical_docs", "architecture", "development_processes"],
            "C-Level": ["financial_reports", "marketing_reports", "employee_data", "technical_docs", "all_data"],
            "Employee": ["general_policies", "company_info", "benefits"]
        }
        
        accessible_types = role_access.get(role, ["general_policies"])
        
        if len(accessible_types) == 1:
            return {"content_type": {"$eq": accessible_types[0]}}
        else:
            return {"content_type": {"$in": accessible_types}}
    
    def _fallback_search(self, query: str, role: str, k: int = 5) -> List[Document]:
        """Fallback search when vector store is not available"""
        # Get role-specific documents
        role_docs = self.document_processor.get_documents_for_role(role)
        
        # Simple keyword matching
        query_terms = query.lower().split()
        scored_docs = []
        
        for doc in role_docs:
            content_lower = doc.page_content.lower()
            score = 0
            
            for term in query_terms:
                score += content_lower.count(term)
            
            if query.lower() in content_lower:
                score += 10
            
            if score > 0:
                scored_docs.append((doc, score))
        
        scored_docs.sort(key=lambda x: x[1], reverse=True)
        return [doc for doc, score in scored_docs[:k]]
    
    def _classify_query_intent(self, query: str) -> str:
        """Classify query intent using keyword matching"""
        query_lower = query.lower()
        intent_scores = {}
        
        for intent, keywords in self.intent_keywords.items():
            score = sum(1 for keyword in keywords if keyword in query_lower)
            if score > 0:
                intent_scores[intent] = score
        
        if intent_scores:
            return max(intent_scores, key=intent_scores.get)
        return "general"
    
    def _enforce_rbac_at_retrieval(self, query: str, role: str) -> Tuple[List[Document], bool]:
        """Enforce RBAC at retrieval level with intent validation"""
        query_intent = self._classify_query_intent(query)
        
        # Check if user role can access the queried domain
        role_domain_access = {
            "Finance": ["finance", "general"],
            "Marketing": ["marketing", "general"],
            "HR": ["hr", "general"],
            "Engineering": ["engineering", "general"],
            "C-Level": ["finance", "marketing", "hr", "engineering", "general"],
            "Employee": ["general"]
        }
        
        allowed_domains = role_domain_access.get(role, ["general"])
        
        if query_intent not in allowed_domains:
            return [], False  # Unauthorized access
        
        # Get relevant documents using vector search or fallback
        relevant_docs = self._vector_similarity_search(query, role)
        
        return relevant_docs, True
    
    async def _generate_llm_response(self, query: str, context: str, user_role: str, query_intent: str) -> str:
        """Generate response using OpenAI LLM"""
        if not self.llm_initialized:
            return self._generate_template_response(query, [], user_role, query_intent)
        
        try:
            system_prompt = f"""You are an AI assistant for FinSolve Technologies, a leading FinTech company. 
You are responding to a {user_role} team member with access to {query_intent} information.

Guidelines:
- Provide accurate, concise, and role-appropriate responses
- Use the provided context to answer questions
- If information is not in the context, clearly state this
- Format responses professionally with clear structure
- Include relevant metrics and data when available
- Maintain confidentiality and data access boundaries

Context: {context}

User Role: {user_role}
Query Domain: {query_intent}"""

            user_prompt = f"Question: {query}\n\nPlease provide a comprehensive answer based on the context provided."

            response = self.llm_client.ChatCompletion.create(
                model=self.llm_model,
                messages=[
                    {"role": "system", "content": system_prompt},
                    {"role": "user", "content": user_prompt}
                ],
                max_tokens=1000,
                temperature=0.7,
            )
            
            return response.choices[0].message.content.strip()
            
        except Exception as e:
            print(f"❌ LLM error: {str(e)}")
            return self._generate_template_response(query, [], user_role, query_intent)
    
    def _generate_template_response(self, query: str, context_docs: List[Document], user_role: str, query_intent: str) -> str:
        """Generate template-based response when LLM is not available"""
        response_parts = []
        response_parts.append(f"**Based on your {user_role} access level:**\n")
        
        # Generate intent-specific responses
        if query_intent == "finance":
            response_parts.extend(self._generate_finance_insights(query, context_docs))
        elif query_intent == "marketing":
            response_parts.extend(self._generate_marketing_insights(query, context_docs))
        elif query_intent == "hr":
            response_parts.extend(self._generate_hr_insights(query, context_docs))
        elif query_intent == "engineering":
            response_parts.extend(self._generate_technical_insights(query, context_docs))
        else:
            response_parts.extend(self._generate_general_insights(query, context_docs))
        
        return "\n".join(response_parts)
    
    def _generate_finance_insights(self, query: str, context_docs: List[Document]) -> List[str]:
        """Generate finance-specific insights"""
        insights = ["💰 **Financial Insights:**", ""]
        
        # Extract content for analysis
        content = " ".join([doc.page_content for doc in context_docs])
        
        if "revenue" in query.lower() or "2.6 billion" in content:
            insights.extend([
                "📈 **Revenue Performance:**",
                "• Q4 2024: $2.6 billion (35% YoY growth)",
                "• Annual 2024: $9.4 billion (28% YoY increase)",
                "• Strong growth trajectory maintained throughout the year",
                ""
            ])
        
        if "margin" in query.lower() or "profit" in query.lower():
            insights.extend([
                "📊 **Profitability Metrics:**",
                "• Gross Margin: 64% (improved from 58% in Q1)",
                "• Net Income: $325M (18% YoY increase)",
                "• Operating Income: $650M",
                ""
            ])
        
        if "cost" in query.lower() or "expense" in query.lower():
            insights.extend([
                "💸 **Cost Analysis:**",
                "• Vendor Services: $30M (18% increase)",
                "• Software Subscriptions: $25M (22% increase)",
                "• Marketing Investment: $2.3B with strong ROI",
                ""
            ])
        
        insights.append("🎯 **Key Takeaway:** Strong revenue growth with improving margins despite increased operational costs.")
        return insights
    
    def _generate_marketing_insights(self, query: str, context_docs: List[Document]) -> List[str]:
        """Generate marketing-specific insights"""
        insights = ["📈 **Marketing Insights:**", ""]
        
        insights.extend([
            "🎯 **Campaign Performance:**",
            "• Customer Acquisition: 20% increase year-over-year",
            "• Digital Campaign ROI: 3.5x return on $5M investment",
            "• Q4 Results: 220,000 new customers (exceeded target)",
            "",
            "💰 **ROI Analysis:**",
            "• Overall Marketing ROI: 4.5x",
            "• Digital Channels: 3.5x return",
            "• Event Marketing: 5.0x return",
            "• Email Marketing: 2.0x return",
            "",
            "🚀 **Key Takeaway:** Successful global expansion with strong ROI across all marketing channels."
        ])
        
        return insights
    
    def _generate_hr_insights(self, query: str, context_docs: List[Document]) -> List[str]:
        """Generate HR-specific insights"""
        insights = ["👥 **HR Insights:**", ""]
        
        if "benefits" in query.lower():
            insights.extend([
                "🏥 **Employee Benefits:**",
                "• Health Insurance: Family floater policy",
                "• Provident Fund: 12% employer contribution",
                "• Maternity Leave: 26 weeks paid leave",
                "• Flexible Work: Up to 2 days/week WFH",
                ""
            ])
        
        if "leave" in query.lower():
            insights.extend([
                "📅 **Leave Policies:**",
                "• Annual Leave: 15-21 days/year",
                "• Sick Leave: 12 days/year",
                "• Casual Leave: 7 days/year",
                "• Emergency Leave: Available with manager approval",
                ""
            ])
        
        insights.append("💡 **Key Takeaway:** Comprehensive benefits package with competitive compensation and flexible work arrangements.")
        return insights
    
    def _generate_technical_insights(self, query: str, context_docs: List[Document]) -> List[str]:
        """Generate technical/engineering insights"""
        insights = ["🔧 **Technical Insights:**", ""]
        
        if "architecture" in query.lower():
            insights.extend([
                "🏗️ **System Architecture:**",
                "• Microservices-based, cloud-native design",
                "• AWS infrastructure with Kubernetes orchestration",
                "• PostgreSQL, MongoDB, Redis for data storage",
                "• 99.99% uptime target with auto-scaling",
                ""
            ])
        
        if "technology" in query.lower():
            insights.extend([
                "💻 **Technology Stack:**",
                "• Frontend: React 18, TypeScript, Tailwind CSS",
                "• Backend: Node.js, Python, Go",
                "• Mobile: Swift (iOS), Kotlin (Android)",
                "• Infrastructure: AWS, Kubernetes, Docker",
                ""
            ])
        
        insights.append("⚡ **Key Takeaway:** Modern, scalable architecture with strong security and compliance standards.")
        return insights
    
    def _generate_general_insights(self, query: str, context_docs: List[Document]) -> List[str]:
        """Generate general company insights"""
        insights = ["🏢 **Company Information:**", ""]
        
        insights.extend([
            "📋 **About FinSolve Technologies:**",
            "• Founded: 2018",
            "• Headquarters: Bangalore, India",
            "• Global presence: North America, Europe, Asia-Pacific",
            "• Services: Digital banking, payments, wealth management",
            "",
            "🎯 **Mission & Values:**",
            "• Mission: Empower financial freedom through technology",
            "• Core Values: Integrity, Innovation, Customer Focus",
            "• Commitment: Secure, scalable financial solutions",
        ])
        
        return insights
    
    def _generate_unauthorized_response(self, query: str, user_role: str, query_intent: str) -> str:
        """Generate graceful unauthorized access message"""
        intent_role_map = {
            "finance": "Finance and Executive",
            "marketing": "Marketing and Executive",
            "hr": "HR and Executive",
            "engineering": "Engineering and Executive"
        }
        
        required_roles = intent_role_map.get(query_intent, "appropriate")
        
        return f"""🛡️ **Access Restricted**

This information is restricted to **{required_roles}** roles only.

Your current role (**{user_role}**) does not have permission to access {query_intent} data.

**Available to you:**
{chr(10).join(['• ' + doc.replace('_', ' ').title() for doc in self.auth_system.get_accessible_documents(user_role)])}

Please contact your administrator if you need access to additional information."""
    
    def _extract_key_metrics(self, content: str, query_intent: str) -> Dict:
        """Extract key metrics for visualization"""
        metrics = {}
        
        if query_intent == "finance":
            revenue_match = re.search(r'revenue[:\s]*\$?([\d.,]+)\s*(billion|million)', content.lower())
            if revenue_match:
                amount = revenue_match.group(1).replace(',', '')
                unit = revenue_match.group(2)
                multiplier = 1000 if unit == 'billion' else 1
                metrics['revenue'] = float(amount) * multiplier
            
            growth_match = re.search(r'(\d+)%\s*(yoy|growth)', content.lower())
            if growth_match:
                metrics['growth_rate'] = int(growth_match.group(1))
        
        elif query_intent == "marketing":
            acq_match = re.search(r'(\d+,?\d*)\s*new customers', content.lower())
            if acq_match:
                metrics['customer_acquisition'] = int(acq_match.group(1).replace(',', ''))
            
            roi_match = re.search(r'(\d+\.?\d*)x\s*r[oe]i', content.lower())
            if roi_match:
                metrics['roi'] = float(roi_match.group(1))
        
        return metrics
    
    def _create_visualization(self, metrics: Dict, query_intent: str) -> Optional[str]:
        """Create visualizations for metrics"""
        if not metrics:
            return None
        
        try:
            if query_intent == "finance" and 'revenue' in metrics:
                quarters = ['Q1', 'Q2', 'Q3', 'Q4']
                revenues = [2100, 2300, 2400, 2600]
                
                fig = px.bar(
                    x=quarters,
                    y=revenues,
                    title="Quarterly Revenue 2024 ($ Millions)",
                    labels={'x': 'Quarter', 'y': 'Revenue ($ Millions)'},
                    color=revenues,
                    color_continuous_scale="viridis"
                )
                fig.update_layout(height=400, showlegend=False)
                return fig.to_html(include_plotlyjs='cdn', div_id="revenue_chart")
            
            elif query_intent == "marketing" and 'customer_acquisition' in metrics:
                months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun']
                acquisitions = [18000, 22000, 25000, 28000, 32000, 35000]
                
                fig = px.line(
                    x=months,
                    y=acquisitions,
                    title="Customer Acquisition Trend 2024",
                    labels={'x': 'Month', 'y': 'New Customers'},
                    markers=True
                )
                fig.update_layout(height=400, showlegend=False)
                return fig.to_html(include_plotlyjs='cdn', div_id="acquisition_chart")
            
            return None
            
        except Exception as e:
            print(f"❌ Error creating visualization: {str(e)}")
            return None
    
    def _create_data_table(self, content: str, query_intent: str) -> Optional[str]:
        """Create data tables from content"""
        try:
            if query_intent == "finance":
                data = {
                    'Metric': ['Q4 Revenue', 'Annual Revenue', 'Net Income', 'Gross Margin', 'ROI'],
                    'Value': ['$2.6B', '$9.4B', '$325M', '64%', '15%'],
                    'YoY Growth': ['+35%', '+28%', '+18%', '+6%', '+3%']
                }
                df = pd.DataFrame(data)
                return df.to_html(index=False, classes='table table-striped', table_id='financial-metrics')
            
            elif query_intent == "marketing":
                data = {
                    'Campaign': ['Digital Ads', 'Influencer', 'Email', 'Events'],
                    'Spend': ['$5M', '$1.5M', '$0.2M', '$2M'],
                    'ROI': ['3.5x', '4.2x', '2.0x', '5.0x'],
                    'Leads': ['180K', '60K', '25K', '300']
                }
                df = pd.DataFrame(data)
                return df.to_html(index=False, classes='table table-striped', table_id='marketing-metrics')
            
            return None
            
        except Exception as e:
            print(f"❌ Error creating table: {str(e)}")
            return None
    
    def store_feedback(self, query: str, response: str, rating: int, role: str):
        """Store user feedback for system improvement"""
        feedback_id = len(self.query_feedback)
        self.query_feedback[feedback_id] = {
            'query': query,
            'response': response,
            'rating': rating,
            'role': role,
            'timestamp': pd.Timestamp.now(),
            'intent': self._classify_query_intent(query)
        }
    
    def query(self, query: str, user_role: str) -> Tuple[str, List[str], Optional[str], Optional[str]]:
        """Enhanced query method with complete RAG pipeline"""
        try:
            if not self.initialized:
                return "System not initialized. Please try again.", [], None, None
            
            # Enforce RBAC at retrieval level
            relevant_docs, authorized = self._enforce_rbac_at_retrieval(query, user_role)
            
            if not authorized:
                query_intent = self._classify_query_intent(query)
                unauthorized_msg = self._generate_unauthorized_response(query, user_role, query_intent)
                return unauthorized_msg, [], None, None
            
            if not relevant_docs:
                return f"No relevant information found in your accessible documents for: {query}", [], None, None
            
            # Generate response using LLM or templates
            query_intent = self._classify_query_intent(query)
            
            if self.llm_initialized:
                # Prepare context for LLM
                context = "\n\n".join([doc.page_content for doc in relevant_docs])
                import asyncio
                try:
                    # Try to get event loop, create one if it doesn't exist
                    loop = asyncio.get_event_loop()
                except RuntimeError:
                    loop = asyncio.new_event_loop()
                    asyncio.set_event_loop(loop)
                
                response = loop.run_until_complete(
                    self._generate_llm_response(query, context, user_role, query_intent)
                )
            else:
                response = self._generate_template_response(query, relevant_docs, user_role, query_intent)
            
            # Extract sources
            sources = []
            for doc in relevant_docs:
                source = doc.metadata.get('title', 'Company Documents')
                if source not in sources:
                    sources.append(source)
            
            # Generate visualizations and tables
            context_content = " ".join([doc.page_content for doc in relevant_docs])
            metrics = self._extract_key_metrics(context_content, query_intent)
            visualization = self._create_visualization(metrics, query_intent)
            table = self._create_data_table(context_content, query_intent)
            
            return response, sources, visualization, table
            
        except Exception as e:
            error_response = f"I apologize, but I encountered an error while processing your query: {str(e)}"
            return error_response, [], None, None
    
    def get_system_status(self) -> Dict:
        """Get comprehensive system status"""
        return {
            "documents_loaded": len(self.documents),
            "system_initialized": self.initialized,
            "vector_store_available": self.vector_store_initialized,
            "llm_available": self.llm_initialized,
            "feedback_entries": len(self.query_feedback),
            "tech_stack": {
                "python": "✅ Active",
                "streamlit": "✅ Active", 
                "vector_store": "✅ ChromaDB" if self.vector_store_initialized else "⚠️ Fallback",
                "llm": f"✅ {self.llm_model}" if self.llm_initialized else "⚠️ Templates",
                "fastapi": "✅ Real FastAPI" if self._check_fastapi_running() else "🔄 Simulated",
                "authentication": "✅ JWT-style RBAC"
            }
        }
    
    def get_available_documents_for_role(self, role: str) -> List[Dict]:
        """Get list of documents available for a specific role"""
        accessible_docs = self.auth_system.get_accessible_documents(role)
        doc_info = self.document_processor.get_document_info()
        
        available = []
        for doc_name in accessible_docs:
            if doc_name in doc_info:
                available.append({
                    "content_type": doc_name,
                    **doc_info[doc_name]
                })
        
        return available