app.py

#!/usr/bin/env python3
"""
Hugging Face Spaces deployment for Residential Architecture Assistant
Multi-Agent LangGraph System for Architecture Consultation
"""

import os
import gradio as gr
import json
import traceback
from typing import List, Tuple, Dict, Any
from datetime import datetime

# Import the core system
from graph import ArchitectureAssistant

class HuggingFaceArchitectureApp:
    """Hugging Face Spaces compatible wrapper for the Architecture Assistant"""
    
    def __init__(self):
        self.assistant = None
        self.conversation_history = []
        
    def initialize_assistant(self, api_key: str, user_id: str = None) -> Tuple[str, bool]:
        """Initialize the assistant with API key"""
        try:
            if not api_key or api_key.strip() == "":
                return "❌ Please provide your OpenAI API key to get started.", False
            
            # Initialize the assistant
            self.assistant = ArchitectureAssistant(
                openai_api_key=api_key.strip(),
                user_id=user_id or f"hf_user_{datetime.now().strftime('%Y%m%d_%H%M%S')}"
            )
            
            return "✅ Architecture Assistant initialized! You can now start your consultation.", True
            
        except Exception as e:
            error_msg = f"❌ Error initializing assistant: {str(e)}"
            print(f"Initialization error: {traceback.format_exc()}")
            return error_msg, False
    
    def chat_with_assistant(self, message: str, history: List[List[str]], api_key: str) -> Tuple[List[List[str]], str]:
        """Process chat message and return updated history"""
        try:
            # Check if assistant is initialized
            if not self.assistant or not api_key:
                error_response = "❌ Please provide your OpenAI API key first."
                history.append([message, error_response])
                return history, ""
            
            # Get response from assistant
            response = self.assistant.chat(message, save_state=True)
            
            # Add to history
            history.append([message, response])
            
            return history, ""
            
        except Exception as e:
            error_response = f"❌ Error: {str(e)}\n\nPlease check your API key and try again."
            print(f"Chat error: {traceback.format_exc()}")
            history.append([message, error_response])
            return history, ""
    
    def get_conversation_summary(self, api_key: str) -> str:
        """Get current conversation summary"""
        try:
            if not self.assistant or not api_key:
                return "❌ Assistant not initialized. Please provide your API key first."
            
            summary = self.assistant.get_conversation_summary()
            
            # Format summary nicely
            formatted_summary = f"""📋 **CONVERSATION SUMMARY**

👤 **User Requirements:**
• Budget: ${summary['user_requirements'].get('budget', 0):,} CAD
• Location: {summary['user_requirements'].get('location', 'Not specified')}
• Family Size: {summary['user_requirements'].get('family_size', 'Not specified')}
• Preferences: {', '.join(summary['user_requirements'].get('lifestyle_preferences', []) or ['None specified'])}

🏠 **Floorplan Requirements:**
• Total Square Footage: {summary['floorplan_requirements'].get('total_sqft', 'Not specified')} sq ft
• Number of Floors: {summary['floorplan_requirements'].get('num_floors', 'Not specified')}
• Lot Dimensions: {summary['floorplan_requirements'].get('lot_dimensions', 'Not specified')}
• Rooms: {len(summary['floorplan_requirements'].get('rooms', []))} room types specified

📊 **Progress:**
• Total Messages: {summary['total_messages']}
• Current Topic: {summary['current_topic'] or 'General consultation'}
"""
            
            return formatted_summary
            
        except Exception as e:
            return f"❌ Error getting summary: {str(e)}"
    
    def reset_conversation(self, api_key: str) -> Tuple[List, str, str]:
        """Reset the conversation"""
        try:
            if self.assistant and api_key:
                self.assistant.reset_conversation()
                return [], "", "✅ Conversation reset. You can start a new consultation."
            else:
                return [], "", "❌ Please initialize with your API key first."
        except Exception as e:
            return [], "", f"❌ Error resetting: {str(e)}"

# Create app instance
app = HuggingFaceArchitectureApp()

# Create Gradio interface
def create_gradio_interface():
    """Create the Gradio interface for Hugging Face Spaces"""
    
    with gr.Blocks(
        title="🏠 Residential Architecture Assistant",
        theme=gr.themes.Soft(),
        css="""
        .container { max-width: 1200px; margin: auto; }
        .header { text-align: center; padding: 20px; }
        .chat-container { height: 500px; }
        .summary-box { background-color: #f8f9fa; padding: 15px; border-radius: 10px; }
        """
    ) as demo:
        
        # Header
        gr.HTML("""
        <div class="header">
            <h1>🏠 Residential Architecture Assistant</h1>
            <p><em>Multi-Agent LangGraph System for Professional Architecture Consultation</em></p>
            <p><strong>✨ 7 AI Specialists | 📐 Professional Floorplans | 💰 Montreal Market Analysis | 📋 Building Codes</strong></p>
        </div>
        """)
        
        # API Key input (persistent across the session)
        with gr.Row():
            api_key_input = gr.Textbox(
                label="🔑 OpenAI API Key",
                placeholder="Enter your OpenAI API key (sk-...)",
                type="password",
                info="Your API key is used securely and not stored. Required for AI agent functionality."
            )
            
        with gr.Row():
            init_btn = gr.Button("🚀 Initialize Assistant", variant="primary", size="sm")
            reset_btn = gr.Button("🔄 Reset Conversation", variant="secondary", size="sm")
        
        init_status = gr.HTML("")
        
        # Main chat interface
        with gr.Row():
            with gr.Column(scale=2):
                chatbot = gr.Chatbot(
                    label="💬 Architecture Consultation",
                    height=500,
                    show_label=True
                )
                
                with gr.Row():
                    msg_input = gr.Textbox(
                        label="Your Message",
                        placeholder="Ask about home design, budgets, floorplans, building codes...",
                        lines=2,
                        scale=4
                    )
                    send_btn = gr.Button("📤 Send", variant="primary", scale=1)
            
            with gr.Column(scale=1):
                gr.HTML("<h3>📊 Project Status</h3>")
                summary_display = gr.HTML(
                    value="<div class='summary-box'>Initialize the assistant to see your project summary.</div>",
                    label="Conversation Summary"
                )
                
                summary_btn = gr.Button("🔄 Update Summary", variant="secondary", size="sm")
        
        # Usage instructions
        with gr.Accordion("📖 How to Use", open=False):
            gr.HTML("""
            <div style="padding: 15px;">
                <h4>🚀 Getting Started:</h4>
                <ol>
                    <li>Enter your OpenAI API key above</li>
                    <li>Click "Initialize Assistant"</li>
                    <li>Start your consultation with questions like:</li>
                </ol>
                
                <h4>💡 Example Questions:</h4>
                <ul>
                    <li>"I want to design a home but don't know where to start"</li>
                    <li>"I have a $800,000 budget for Montreal - is that realistic?"</li>
                    <li>"We're a family of 4, what size house do we need?"</li>
                    <li>"Can you generate a floorplan for a 2500 sq ft house?"</li>
                    <li>"What building permits do I need in Montreal?"</li>
                </ul>
                
                <h4>🤖 Our AI Specialists:</h4>
                <ul>
                    <li><strong>RouterAgent:</strong> Intelligent conversation routing</li>
                    <li><strong>GeneralDesignAgent:</strong> Architecture principles & design guidance</li>
                    <li><strong>BudgetAnalysisAgent:</strong> Montreal market cost analysis</li>
                    <li><strong>FloorplanAgent:</strong> Spatial planning & requirements</li>
                    <li><strong>FloorplanGeneratorAgent:</strong> Detailed architectural specifications</li>
                    <li><strong>DetailedBudgetAgent:</strong> Comprehensive cost breakdowns</li>
                    <li><strong>RegulationAgent:</strong> Montreal building codes & permits</li>
                </ul>
            </div>
            """)
        
        # Event handlers
        def handle_init(api_key):
            status_msg, success = app.initialize_assistant(api_key)
            if success:
                return gr.HTML(f"<div style='color: green; padding: 10px;'>{status_msg}</div>")
            else:
                return gr.HTML(f"<div style='color: red; padding: 10px;'>{status_msg}</div>")
        
        def handle_chat(message, history, api_key):
            return app.chat_with_assistant(message, history, api_key)
        
        def handle_summary(api_key):
            summary = app.get_conversation_summary(api_key)
            return f"<div class='summary-box'>{summary}</div>"
        
        def handle_reset(api_key):
            history, msg, status = app.reset_conversation(api_key)
            return history, msg, gr.HTML(f"<div style='color: green; padding: 10px;'>{status}</div>")
        
        # Wire up events
        init_btn.click(
            handle_init,
            inputs=[api_key_input],
            outputs=[init_status]
        )
        
        msg_input.submit(
            handle_chat,
            inputs=[msg_input, chatbot, api_key_input],
            outputs=[chatbot, msg_input]
        )
        
        send_btn.click(
            handle_chat,
            inputs=[msg_input, chatbot, api_key_input],
            outputs=[chatbot, msg_input]
        )
        
        summary_btn.click(
            handle_summary,
            inputs=[api_key_input],
            outputs=[summary_display]
        )
        
        reset_btn.click(
            handle_reset,
            inputs=[api_key_input],
            outputs=[chatbot, msg_input, init_status]
        )
        
        # Footer
        gr.HTML("""
        <div style="text-align: center; padding: 20px; margin-top: 30px; border-top: 1px solid #ddd;">
            <p><strong>🏠 Residential Architecture Assistant v3.0</strong></p>
            <p>Built with <a href="https://langchain.ai/langgraph">LangGraph</a> • 
               Powered by <a href="https://openai.com">OpenAI</a> • 
               Interface by <a href="https://gradio.app">Gradio</a></p>
            <p><em>Professional architecture consultation from concept to construction</em></p>
        </div>
        """)
    
    return demo

# Create and launch the interface
if __name__ == "__main__":
    demo = create_gradio_interface()
    
    # Launch configuration for Hugging Face Spaces
    demo.launch(
        server_name="0.0.0.0",
        server_port=7860,
        share=False,
        show_error=True,
        max_threads=10
    )