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 / "qlib" / "mcp_output" / "mcp_plugin"
if str(PLUGIN_DIR) not in sys.path:
    sys.path.insert(0, str(PLUGIN_DIR))

app = FastAPI(title="qlib MCP Info App", version="1.0.0")


def _extract_tools(mcp_instance: Any) -> list[dict[str, str]]:
    tools_obj = getattr(mcp_instance, "tools", None)
    if tools_obj is None:
        return []

    tool_items: list[Any]
    if isinstance(tools_obj, dict):
        tool_items = list(tools_obj.values())
    elif isinstance(tools_obj, list):
        tool_items = tools_obj
    else:
        try:
            tool_items = list(tools_obj)
        except Exception:
            return []

    result: list[dict[str, str]] = []
    for tool in tool_items:
        name = getattr(tool, "name", None)
        if name is None:
            name = getattr(tool, "__name__", "unknown")
        description = getattr(tool, "description", "") or ""
        result.append({"name": str(name), "description": str(description)})
    return result


@app.get("/")
def root() -> dict[str, Any]:
    return {
        "service": "qlib-mcp-deployment",
        "mcp_entrypoint": "qlib/mcp_output/start_mcp.py",
        "transport_env": "MCP_TRANSPORT",
        "default_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, Any]:
    from mcp_service import create_app

    mcp_instance = create_app()
    return {"tools": _extract_tools(mcp_instance)}


if __name__ == "__main__":
    import uvicorn

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