"""
Server Info Tool

Exposes server version, capabilities, and metadata as an MCP tool
so that LLM clients can query the server's current state.
"""

import importlib.metadata
import os
from datetime import datetime, timezone

from mcp.server.fastmcp import FastMCP
from mcp.types import EmbeddedResource, TextResourceContents

from strava_mcp_server.strava_client import StravaClient


def _get_version() -> str:
    try:
        return importlib.metadata.version("strava-mcp-server-hnrx")
    except importlib.metadata.PackageNotFoundError:
        return "dev"


def register(mcp: FastMCP, strava: StravaClient) -> None:

    @mcp.tool(
        name="get_server_info",
        description=(
            "Returns metadata about this MCP server instance: version, available tools, "
            "transport mode, and connection status. Call this first to understand the "
            "server's capabilities and current configuration."
        ),
    )
    async def get_server_info() -> list:
        version = _get_version()
        transport = os.getenv("MCP_TRANSPORT", "stdio")
        host = os.getenv("HOST", "0.0.0.0")
        port = os.getenv("PORT", "8000")
        has_token = bool(os.getenv("STRAVA_REFRESH_TOKEN"))
        queried_at = datetime.now(timezone.utc).isoformat()

        # Human-readable summary
        status = (
            "✅ Authenticated" if has_token else "⚠️ Unauthenticated (no REFRESH_TOKEN)"
        )
        endpoint = f"http://{host}:{port}/mcp" if transport == "http" else "stdio"

        markdown = f"""## Strava MCP Server

| Field         | Value                          |
|---------------|-------------------------------|
| **Version**   | `{version}`                   |
| **Transport** | `{transport}` → `{endpoint}` |
| **Status**    | {status}                      |
| **Queried**   | {queried_at}                  |

### Available Tool Categories
- 🏃 **Athlete** – Profile, stats, heart rate zones
- 🚴 **Activities** – List, detail, laps, streams, comments
- 🏆 **Segments** – Popular segments, starred segments, efforts
- 🛣️ **Routes** – Athlete routes
- 🏟️ **Clubs** – Membership, club activities
- ⚙️ **Gear** – Bikes and shoes with mileage

### Quick Links
- [Repository](https://git.hnrx.net/hnrx/strava-mcp-server)
- [Website](https://strava-mcp.web.s3.hnrx.net)
- [PyPI](https://pypi.org/project/strava-mcp-server-hnrx/)
"""

        data = {
            "server": "strava-mcp-server-hnrx",
            "version": version,
            "transport": transport,
            "endpoint": endpoint,
            "authenticated": has_token,
            "queried_at": queried_at,
            "tool_categories": [
                "athlete",
                "activities",
                "segments",
                "routes",
                "clubs",
                "gear",
            ],
            "links": {
                "repository": "https://git.hnrx.net/hnrx/strava-mcp-server",
                "website": "https://strava-mcp.web.s3.hnrx.net",
                "pypi": "https://pypi.org/project/strava-mcp-server-hnrx/",
            },
        }

        import json

        return [
            {"type": "text", "text": markdown},
            EmbeddedResource(
                type="resource",
                resource=TextResourceContents(
                    uri="strava://server/info",
                    mimeType="application/json",
                    text=json.dumps(data, indent=2),
                ),
            ),
        ]