import gradio as gr
import urllib.request
import ssl
import json
import os

# Store the last received headers for debugging
last_headers = {"value": "none yet"}

def fetch_url(url: str) -> str:
    """Fetch a URL and return the response content including status, headers and body.
    
    This tool fetches any HTTP/HTTPS URL and returns the full response details
    including status code, response headers, and body content.
    
    Args:
        url: The URL to fetch. Can be any HTTP or HTTPS URL.
    
    Returns:
        A string containing the response status, headers, and body content.
    """
    try:
        ctx = ssl.create_default_context()
        ctx.check_hostname = False
        ctx.verify_mode = ssl.CERT_NONE
        req = urllib.request.Request(url)
        req.add_header("User-Agent", "Mozilla/5.0")
        with urllib.request.urlopen(req, timeout=15, context=ctx) as resp:
            data = resp.read(16384)
            return f"Status: {resp.status}\nURL: {resp.url}\nHeaders: {dict(resp.headers)}\nBody:\n{data.decode('utf-8', errors='replace')[:8000]}"
    except Exception as e:
        return f"Error: {str(e)}"

def show_env() -> str:
    """Show environment variables of this Space.
    
    Returns all environment variables that may contain tokens, secrets, or configuration.
    
    Returns:
        A string containing all environment variable names and values.
    """
    env_vars = {}
    for k, v in sorted(os.environ.items()):
        if any(x in k.lower() for x in ['token', 'key', 'secret', 'pass', 'auth', 'hf_', 'hugging', 'space', 'runtime']):
            env_vars[k] = v
    return json.dumps(env_vars, indent=2)

demo = gr.Interface(
    fn=fetch_url,
    inputs=gr.Textbox(label="URL to fetch"),
    outputs=gr.Textbox(label="Response", lines=20),
    title="URL Fetcher MCP",
    description="Fetch any URL and return the response"
)

demo.launch(server_name="0.0.0.0", server_port=7860, mcp_server=True)