# utils/storage_init.py

import os
import streamlit as st
from pathlib import Path

def initialize_storage_structure():
    """Initialize the storage structure and verify its existence."""
    # Check if /data exists (Hugging Face persistent storage)
    if os.path.exists('/data'):
        base_path = Path('/data')
    else:
        # Fallback to local data directory in project
        base_path = Path(os.getcwd()) / 'data'
    
    try:
        # Create main directories
        directories = [
            base_path / 'database',
            base_path / 'files',
            base_path / 'vectorstore',
            base_path / 'metadata'
        ]
        
        # Create each directory
        for directory in directories:
            directory.mkdir(parents=True, exist_ok=True)
            
        # Print debug information
        st.write("Storage directories initialized at:", str(base_path))
        st.write("Available directories:")
        for directory in directories:
            st.write(f"- {directory}: {'Exists' if directory.exists() else 'Failed to create'}")
            
        # Try to create a test file to verify write permissions
        test_file = base_path / 'database' / '.test_write'
        try:
            test_file.touch()
            test_file.unlink()  # Remove the test file
            st.success("Storage system initialized successfully!")
        except Exception as e:
            st.error(f"Write permission test failed: {e}")
            
        return base_path
            
    except Exception as e:
        st.error(f"Error initializing storage structure: {e}")
        return None

def verify_storage_access(base_path: Path):
    """Verify storage access and permissions."""
    try:
        # Check directory existence and permissions
        checks = {
            'exists': base_path.exists(),
            'is_dir': base_path.is_dir(),
            'readable': os.access(base_path, os.R_OK),
            'writable': os.access(base_path, os.W_OK),
            'executable': os.access(base_path, os.X_OK)
        }
        
        # Print debug information
        st.write("Storage Access Verification:")
        for check, result in checks.items():
            st.write(f"- {check}: {'✅' if result else '❌'}")
            
        # Return overall status
        return all(checks.values())
        
    except Exception as e:
        st.error(f"Error verifying storage access: {e}")
        return False