from __future__ import annotations

import sys
from threading import Event
from typing import Callable

from agents import Agent
from tools import Tool

ToolBuilder = Callable[[str], Tool]
ToolRunner = Callable[[Tool], None]


def run_agent(
    agent: Agent,
    *,
    build_tool: ToolBuilder,
    run_tool: ToolRunner,
    stop_event: Event,
) -> None:
    """Execute *agent* by wiring it to the tool runtime."""

    def invoke_tool(spec: str) -> bool:
        name = spec.strip()
        if not name:
            print("[Agent] Ignoring empty tool spec", file=sys.stderr)
            return False
        try:
            tool = build_tool(name)
        except RuntimeError as exc:
            print(f"[Agent] Failed to load tool '{name}': {exc}", file=sys.stderr)
            return False
        print(f"[Agent] Running tool '{name}'")
        run_tool(tool)
        return True

    agent.run(invoke_tool=invoke_tool, stop_event=stop_event)