#!/usr/bin/env python3

"""
Deletes MCP (Model Control Protocol) tools from the TrustGraph system.
Removes MCP tool configurations by name from the 'mcp' configuration group.
"""

import argparse
import os
from trustgraph.api import Api, ConfigKey
import textwrap

default_url = os.getenv("TRUSTGRAPH_URL", 'http://localhost:8088/')

def delete_mcp_tool(
        url : str,
        name : str,
):

    api = Api(url).config()

    # Check if the tool exists first
    try:
        values = api.get([
            ConfigKey(type="mcp", key=name)
        ])
        
        if not values or not values[0].value:
            print(f"MCP tool '{name}' not found.")
            return False
            
    except Exception as e:
        print(f"MCP tool '{name}' not found.")
        return False

    # Delete the MCP tool configuration from the 'mcp' group
    try:
        api.delete([
            ConfigKey(type="mcp", key=name)
        ])
        
        print(f"MCP tool '{name}' deleted successfully.")
        return True
        
    except Exception as e:
        print(f"Error deleting MCP tool '{name}': {e}")
        return False

def main():

    parser = argparse.ArgumentParser(
        prog='tg-delete-mcp-tool',
        description=__doc__,
        epilog=textwrap.dedent('''
            This utility removes MCP tool configurations from the TrustGraph system.
            Once deleted, the tool will no longer be available for use.
            
            Examples:
              %(prog)s --name weather
              %(prog)s --name calculator
              %(prog)s --api-url http://localhost:9000/ --name file-reader
        ''').strip(),
        formatter_class=argparse.RawDescriptionHelpFormatter
    )

    parser.add_argument(
        '-u', '--api-url',
        default=default_url,
        help=f'API URL (default: {default_url})',
    )

    parser.add_argument(
        '--name',
        required=True,
        help='MCP tool name to delete',
    )

    args = parser.parse_args()

    try:

        if not args.name:
            raise RuntimeError("Must specify --name for MCP tool to delete")

        delete_mcp_tool(
            url=args.api_url, 
            name=args.name
        )

    except Exception as e:

        print("Exception:", e, flush=True)

main()