"""根据配置文件构造 MCP runner。"""

from __future__ import annotations

from pathlib import Path

from .mcp_client import McpClientConfig, StdioMcpToolClient, load_mcp_client_config
from .mcp_runner import McpActionRunner


def build_mcp_runner_from_config(path: str | Path) -> McpActionRunner:
    """读取 MCP 配置文件，并构造可直接给 Agent 使用的 runner。"""
    config = load_mcp_client_config(path)
    client = build_mcp_client(config)
    return McpActionRunner(client=client, tool_names=config.tool_names or None)


def build_mcp_client(config: McpClientConfig):
    """根据 transport 类型创建 MCP client。"""
    if config.transport == "stdio":
        return StdioMcpToolClient(
            command=config.command,
            args=config.args,
            env=config.env,
            cwd=config.cwd or None,
            timeout_seconds=config.timeout_seconds,
        )
    raise ValueError(f"不支持的 MCP transport: {config.transport}")