from __future__ import annotations

import os
import sys
import importlib
from pathlib import Path
from typing import Any, Dict, List

try:
    FastAPI = importlib.import_module("fastapi").FastAPI
except Exception:  # pragma: no cover
    FastAPI = None

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

if FastAPI is None:
    raise RuntimeError("fastapi is required to run app.py")

app = FastAPI(title="GStools MCP Info Service", version="1.0.0")


@app.get("/")
def root() -> Dict[str, Any]:
    return {
        "service": "GStools MCP Deployment",
        "mcp_endpoint": "/mcp",
        "transport": os.getenv("MCP_TRANSPORT", "stdio"),
        "default_port": int(os.getenv("PORT", "7860")),
        "note": "This FastAPI app is supplementary and does not run MCP transport.",
    }


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


@app.get("/tools")
def tools() -> Dict[str, List[Dict[str, Any]]]:
    module = importlib.import_module("mcp_service")
    create_app = getattr(module, "create_app")
    mcp = create_app()
    discovered: List[Dict[str, Any]] = []

    tools_obj = getattr(mcp, "tools", None)
    if isinstance(tools_obj, dict):
        for name, tool in tools_obj.items():
            description = getattr(tool, "description", "")
            discovered.append({"name": str(name), "description": description})
    elif isinstance(tools_obj, list):
        for tool in tools_obj:
            name = getattr(tool, "name", str(tool))
            description = getattr(tool, "description", "")
            discovered.append({"name": name, "description": description})

    return {"tools": discovered}


if __name__ == "__main__":
    import uvicorn

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