"""
Simple HuggingFace MCP Spaces Finder Module
A minimal module to discover MCP servers on HuggingFace Spaces.
Just a dropdown that displays the selected value in a textbox.
Usage:
    from mcp_spaces_finder import create_simple_mcp_selector
    
    # One-liner in your Gradio app
    dropdown, textbox = create_simple_mcp_selector()
"""

import gradio as gr
from huggingface_hub import list_spaces
import time
from typing import List, Tuple
from concurrent.futures import ThreadPoolExecutor, as_completed

class SimpleMCPFinder:
    """Simple MCP spaces finder with caching."""
    
    def __init__(self, cache_duration: int = 300):
        self.cache = None
        self.cache_time = None
        self.cache_duration = cache_duration
    
    def get_mcp_spaces(self) -> List[str]:
        """Get list of running MCP space IDs."""
        
        # Check cache
        if (self.cache is not None and 
            self.cache_time is not None and 
            time.time() - self.cache_time < self.cache_duration):
            return self.cache
        
        print("Fetching MCP spaces...")
        
        # Get MCP spaces sorted by likes
        spaces = list(list_spaces(
            filter="mcp-server",
            sort="likes",
            direction=-1,
            limit=1000,
            full=True
        ))
        
        # Extract just the space IDs 
        space_ids = [space.id for space in spaces]
        
        # Cache results
        self.cache = space_ids
        self.cache_time = time.time()
        
        print(f"Found {len(space_ids)} MCP spaces")
        return space_ids

# Global instance
_finder = SimpleMCPFinder()

def create_simple_mcp_selector(
    dropdown_label: str = "🤖 Select MCP Server",
    textbox_label: str = "Selected MCP Server",
    placeholder: str = "No server selected"
) -> Tuple[gr.Dropdown, gr.Textbox]:
    """
    Create a simple MCP selector with dropdown and textbox.
    
    Args:
        dropdown_label (str): Label for the dropdown
        textbox_label (str): Label for the textbox  
        placeholder (str): Placeholder text when nothing selected
        
    Returns:
        Tuple[gr.Dropdown, gr.Textbox]: The dropdown and textbox components
    """
    
    # Get MCP spaces
    spaces = _finder.get_mcp_spaces()
    
    # Create dropdown with space choices
    dropdown = gr.Dropdown(
        choices=spaces,
        label=f"{dropdown_label} ({len(spaces)} available)",
        value=None
    )
    
    # Create textbox to display selection
    textbox = gr.Textbox(
        label=textbox_label,
        value=placeholder,
        interactive=False
    )
    
    # Connect dropdown to textbox
    def update_textbox(selected_value):
        return selected_value if selected_value else placeholder
    
    dropdown.change(
        fn=update_textbox,
        inputs=[dropdown], 
        outputs=[textbox]
    )
    
    return dropdown, textbox

def refresh_mcp_spaces():
    """Clear cache to force refresh."""
    _finder.cache = None
    _finder.cache_time = None