import json
import os
import sys
import urllib.request


def emit(key: str, value) -> None:
    # JSON string literals are valid YAML scalars (YAML 1.2 is a superset of JSON).
    print(f"{key}: {json.dumps(value)}")


def require_env(name: str) -> str:
    value = os.environ.get(name)
    if not value:
        print(f"Error: {name} environment variable is not set.", file=sys.stderr)
        sys.exit(1)
    return value


def main() -> None:
    url = require_env("URL")

    req = urllib.request.Request(url, data=b"hello", method="POST")
    req.add_header("Content-Type", "text/plain")
    req.add_header("X-Test", "123")

    with urllib.request.urlopen(req, timeout=10) as resp:
        data = json.loads(resp.read().decode())

    emit("method", data.get("method"))
    emit("path", data.get("path"))
    emit("query", data.get("query"))
    emit("body", data.get("body"))

    headers = data.get("headers") or {}
    x_test = None
    if isinstance(headers.get("X-Test"), list) and headers["X-Test"]:
        x_test = headers["X-Test"][0]
    emit("x_test", x_test)


if __name__ == "__main__":
    main()