import os
import sys
import importlib
from pathlib import Path

try:
    FastAPI = importlib.import_module("fastapi").FastAPI
except Exception:
    FastAPI = None

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

if FastAPI is None:
    class _FallbackApp:
        def get(self, _: str):
            def decorator(func):
                return func
            return decorator

    app = _FallbackApp()
else:
    app = FastAPI(title="climlab MCP info app", version="1.0.0")


@app.get("/")
def root() -> dict:
    return {
        "name": "climlab-mcp",
        "description": "Supplementary API for local development and tool discovery.",
        "mcp_http_path": "/mcp",
        "port": int(os.getenv("PORT", "7860")),
    }


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


@app.get("/tools")
def tools() -> dict:
    mcp_service = importlib.import_module("mcp_service")
    create_app = getattr(mcp_service, "create_app")

    mcp = create_app()
    tool_entries = []

    raw_tools = getattr(mcp, "tools", [])
    if isinstance(raw_tools, dict):
        iterable = raw_tools.values()
    else:
        iterable = raw_tools

    for item in iterable:
        if isinstance(item, dict):
            name = item.get("name", "unknown")
            description = item.get("description", "")
        else:
            name = getattr(item, "name", "unknown")
            description = getattr(item, "description", "")
        tool_entries.append({"name": name, "description": description})

    return {"count": len(tool_entries), "tools": tool_entries}