#!/usr/bin/env python3
"""Verify connectivity to Context7's hosted MCP server.

Sends a lightweight JSON-RPC initialize to https://mcp.context7.com/mcp
and checks for a successful response. No API key required — Context7's
remote MCP endpoint works on the free tier without authentication.

Prints a single JSON object on stdout:
    {"ok": true,  "message": "Context7 MCP endpoint is reachable"}
    {"ok": false, "message": "Context7 MCP endpoint is unreachable: <reason>"}

Exit code is 0 on success, 1 on any failure.
stdlib only (urllib).
"""
import json
import sys
import urllib.error
import urllib.request


def _result(ok, message):
    print(json.dumps({"ok": ok, "message": message}))
    sys.exit(0 if ok else 1)


def main():
    url = "https://mcp.context7.com/mcp"

    body = json.dumps({
        "jsonrpc": "2.0",
        "id": 1,
        "method": "initialize",
        "params": {
            "protocolVersion": "2025-03-26",
            "capabilities": {},
            "clientInfo": {"name": "skald-verify", "version": "1.0.0"},
        },
    }).encode("utf-8")

    req = urllib.request.Request(
        url,
        data=body,
        headers={
            "Content-Type": "application/json",
            "Accept": "application/json, text/event-stream",
        },
        method="POST",
    )

    try:
        with urllib.request.urlopen(req, timeout=15) as resp:
            data = resp.read().decode("utf-8")
            if 200 <= resp.status < 300:
                # Check for a valid JSON-RPC result in the SSE event stream
                if '"result"' in data and '"serverInfo"' in data:
                    _result(True, "Context7 MCP endpoint is reachable")
                _result(False, f"Context7 returned unexpected response: {data[:200]}")
            _result(False, f"Context7 returned HTTP {resp.status}")
    except urllib.error.HTTPError as e:
        _result(False, f"Context7 returned HTTP {e.code}: {e.reason}")
    except Exception as e:
        _result(False, f"Context7 MCP endpoint is unreachable: {e}")


if __name__ == "__main__":
    main()