app.py

from __future__ import annotations

import os
import sys
from pathlib import Path
from typing import Any

from fastapi import FastAPI

PLUGIN_DIR = Path(__file__).resolve().parent / "langgraph" / "mcp_output" / "mcp_plugin"
plugin_dir_str = str(PLUGIN_DIR)
if plugin_dir_str not in sys.path:
    sys.path.insert(0, plugin_dir_str)

PORT = int(os.getenv("PORT", "7860"))
app = FastAPI(title="langgraph-mcp-info", version="1.0.0")


@app.get("/")
def root() -> dict[str, Any]:
    return {
        "service": "langgraph-mcp",
        "description": "Supplementary info API for local development",
        "mcp_transport": os.getenv("MCP_TRANSPORT", "stdio"),
        "mcp_port": os.getenv("MCP_PORT", "8000"),
        "port": PORT,
    }


@app.get("/health")
def health() -> dict[str, str]:
    return {"status": "healthy"}


@app.get("/tools")
def tools() -> dict[str, Any]:
    try:
        from mcp_service import create_app

        mcp = create_app()
        tool_items: list[dict[str, str]] = []
        tools_obj = getattr(mcp, "tools", None)

        if isinstance(tools_obj, dict):
            iterable = tools_obj.values()
        elif isinstance(tools_obj, list):
            iterable = tools_obj
        else:
            iterable = []

        for tool in iterable:
            name = getattr(tool, "name", getattr(tool, "__name__", "unknown"))
            description = getattr(tool, "description", "")
            tool_items.append({"name": str(name), "description": str(description)})

        return {"count": len(tool_items), "tools": tool_items}
    except Exception as exc:
        return {"count": 0, "tools": [], "error": str(exc)}


if __name__ == "__main__":
    import uvicorn

    uvicorn.run(app, host="0.0.0.0", port=PORT)