"""
Event handlers for connecting UI to backend
"""

import logging
import uuid
from typing import Dict, Any

logger = logging.getLogger(__name__)

class EventHandlers:
    def __init__(self, components: Dict[str, Any]):
        self.components = components
        self.sessions = {}  # In-memory session storage
    
    async def handle_message_submit(self, message: str, chat_history: list, 
                                  session_id: str, show_reasoning: bool, 
                                  show_agent_trace: bool, request):
        """Handle user message submission"""
        try:
            # Ensure session exists
            if session_id not in self.sessions:
                self.sessions[session_id] = {
                    'history': [],
                    'context': {},
                    'created_at': uuid.uuid4().hex
                }
            
            # Add user message to history
            chat_history.append((message, None))  # None for pending response
            
            # Generate response based on available components
            if self.components.get('mock_mode'):
                response = self._generate_mock_response(message)
            else:
                response = await self._generate_ai_response(message, session_id)
            
            # Update chat history with response
            chat_history[-1] = (message, response)
            
            # Prepare additional data for UI
            reasoning_data = {}
            performance_data = {}
            
            if show_reasoning:
                reasoning_data = {
                    "chain_of_thought": {
                        "step_1": {
                            "hypothesis": "Mock reasoning for demonstration",
                            "evidence": ["Mock mode active", f"User input: {message[:50]}..."],
                            "confidence": 0.5,
                            "reasoning": "Demonstration mode - enhanced reasoning chain not available"
                        }
                    },
                    "alternative_paths": [],
                    "uncertainty_areas": [
                        {
                            "aspect": "System mode",
                            "confidence": 0.5,
                            "mitigation": "Mock mode - full reasoning chain not available"
                        }
                    ],
                    "evidence_sources": [],
                    "confidence_calibration": {"overall_confidence": 0.5, "mock_mode": True}
                }
            
            if show_agent_trace:
                performance_data = {"agents_used": ["intent", "synthesis", "safety"]}
            
            return "", chat_history, reasoning_data, performance_data
            
        except Exception as e:
            logger.error(f"Error handling message: {e}")
            error_response = "I apologize, but I'm experiencing technical difficulties. Please try again."
            chat_history.append((message, error_response))
            return "", chat_history, {"error": str(e)}, {"status": "error"}
    
    def _generate_mock_response(self, message: str) -> str:
        """Generate mock response for demonstration"""
        mock_responses = [
            f"I understand you're asking about: {message}. This is a mock response while the AI system initializes.",
            f"Thank you for your question: '{message}'. The research assistant is currently in demonstration mode.",
            f"Interesting question about {message}. In a full implementation, I would analyze this using multiple AI agents.",
            f"I've received your query: '{message}'. The system is working properly in mock mode."
        ]
        
        import random
        return random.choice(mock_responses)
    
    async def _generate_ai_response(self, message: str, session_id: str) -> str:
        """Generate AI response using orchestrator"""
        try:
            if 'orchestrator' in self.components:
                result = await self.components['orchestrator'].process_request(
                    session_id=session_id,
                    user_input=message
                )
                return result.get('final_response', 'No response generated')
            else:
                return "Orchestrator not available. Using mock response."
        except Exception as e:
            logger.error(f"AI response generation failed: {e}")
            return f"AI processing error: {str(e)}"
    
    def handle_new_session(self):
        """Handle new session creation"""
        new_session_id = uuid.uuid4().hex[:8]  # Short session ID for display
        self.sessions[new_session_id] = {
            'history': [],
            'context': {},
            'created_at': uuid.uuid4().hex
        }
        return new_session_id, []  # New session ID and empty history
    
    def handle_settings_toggle(self, current_visibility: bool):
        """Toggle settings panel visibility"""
        return not current_visibility
    
    def handle_tab_change(self, tab_name: str):
        """Handle tab changes in mobile interface"""
        return tab_name, False  # Return tab name and hide mobile nav

# Factory function
def create_event_handlers(components: Dict[str, Any]):
    return EventHandlers(components)