"""
PANSEA University Requirements Assistant - Gradio Version (Modular)
A comprehensive tool for navigating university admission requirements across Southeast Asia.
"""
import gradio as gr
import os
import sys
from datetime import datetime

# Add the current directory to Python path for imports
sys.path.append(os.path.dirname(os.path.abspath(__file__)))

# Import our RAG system
from utils.rag_system import DocumentIngestion, RAGSystem

# Import modular tab components
from tabs.initialize import create_initialize_tab
from tabs.upload import create_upload_tab
from tabs.query import create_query_tab
from tabs.manage import create_manage_tab
from tabs.help import create_help_tab

def create_interface():
    """Create the main Gradio interface using modular components"""
    
    # Global state management - shared across all tabs
    global_vars = {
        'doc_ingestion': None,
        'rag_system': None,
        'vectorstore': None
    }
    
    # Custom CSS for better styling
    custom_css = """
    .gradio-container {
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }
    .tab-nav button {
        font-weight: 500;
        font-size: 14px;
    }
    .tab-nav button[aria-selected="true"] {
        background: linear-gradient(45deg, #1e3a8a, #3b82f6);
        color: white;
    }
    .feedback-box {
        background: #f8fafc;
        border: 1px solid #e2e8f0;
        border-radius: 8px;
        padding: 16px;
        margin: 8px 0;
    }
    .success-message {
        background: #dcfce7;
        color: #166534;
        border: 1px solid #bbf7d0;
        padding: 12px;
        border-radius: 6px;
        margin: 8px 0;
    }
    .error-message {
        background: #fef2f2;
        color: #dc2626;
        border: 1px solid #fecaca;
        padding: 12px;
        border-radius: 6px;
        margin: 8px 0;
    }
    """
    
    # Create the main interface
    with gr.Blocks(
        title="🌏 PANSEA University Assistant",
        theme=gr.themes.Soft(
            primary_hue="blue",
            secondary_hue="slate"
        ),
        css=custom_css,
        analytics_enabled=False
    ) as interface:
        
        # Header
        gr.Markdown("""
        # 🌏 TopEdu
        
        **Navigate University Admission Requirements Across Southeast Asia with AI-Powered Assistance**
        
        Upload university documents, ask questions, and get intelligent answers about admission requirements,
        programs, deadlines, and more across Southeast Asian universities.
        
        ---
        """)
        
        # Main tabs using modular components
        with gr.Tabs():
            create_initialize_tab(global_vars)
            create_upload_tab(global_vars)
            create_query_tab(global_vars)
            create_manage_tab(global_vars)
            create_help_tab(global_vars)
        
        # Footer
        gr.Markdown(f"""
        ---
        
        **🔧 System Status**: Ready | **📅 Session**: {datetime.now().strftime('%Y-%m-%d %H:%M')} | **🔄 Version**: Modular Gradio
        
        💡 **Tip**: Start by initializing the system, then upload your university documents, and begin querying!
        """)
    
    return interface

def main():
    """Launch the application"""
    interface = create_interface()
    
    # Launch configuration
    interface.launch(
        share=False,           # Set to True for public sharing
        server_name="0.0.0.0", # Allow external connections
        server_port=7860,      # Default Gradio port
        show_api=False,        # Hide API documentation
        show_error=True,       # Show detailed error messages
        quiet=False,           # Show startup messages
        favicon_path=None,     # Could add custom favicon
        app_kwargs={
            "docs_url": None,  # Disable FastAPI docs
            "redoc_url": None  # Disable ReDoc docs
        }
    )

if __name__ == "__main__":
    print("🚀 Starting PANSEA University Requirements Assistant...")
    print("📍 Access the application at: http://localhost:7860")
    print("🔗 For public sharing, set share=True in the launch() method")
    print("-" * 60)
    main()