from __future__ import annotations

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

from fastapi import FastAPI

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

app = FastAPI(title="chemlib MCP Supplementary App")


def _tool_to_dict(tool: Any) -> dict[str, str]:
    name = getattr(tool, "name", None)
    description = getattr(tool, "description", None)

    if isinstance(tool, dict):
        name = name or tool.get("name")
        description = description or tool.get("description")

    return {
        "name": str(name) if name is not None else "unknown",
        "description": str(description) if description is not None else "",
    }


@app.get("/")
def root() -> dict[str, Any]:
    return {
        "service": "chemlib-mcp",
        "description": "Supplementary info API for chemlib MCP deployment.",
        "mcp_http_endpoint": "/mcp",
        "note": "This FastAPI app is not the MCP server entry point.",
    }


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


@app.get("/tools")
def list_tools() -> dict[str, Any]:
    import importlib

    mcp_service = importlib.import_module("mcp_service")
    mcp = mcp_service.create_app()
    tools = getattr(mcp, "tools", [])
    return {"tools": [_tool_to_dict(tool) for tool in tools]}


if __name__ == "__main__":
    import uvicorn

    port = int(os.getenv("PORT", "7860"))
    uvicorn.run("app:app", host="0.0.0.0", port=port, reload=False)