import json, os, sys, urllib.parse, urllib.request, urllib.error


def _cfg():
    return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))


def _inputs():
    return json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))


def _base(cfg):
    return "https://api." + str(cfg.get("site") or "datadoghq.com")


def request(method, path, cfg, body=None, params=None):
    url = _base(cfg) + path
    if params:
        clean = {k: v for k, v in params.items() if v not in (None, "")}
        if clean:
            url += "?" + urllib.parse.urlencode(clean)
    data = json.dumps(body).encode("utf-8") if body is not None else None
    headers = {
        "DD-API-KEY": str(cfg.get("api_key", "")),
        "DD-APPLICATION-KEY": str(cfg.get("app_key", "")),
        "Accept": "application/json",
    }
    if data is not None:
        headers["Content-Type"] = "application/json"
    req = urllib.request.Request(url, data=data, headers=headers, method=method)
    with urllib.request.urlopen(req, timeout=60) as r:
        raw = r.read()
        return json.loads(raw) if raw else {}


def _run(fn):
    try:
        print(json.dumps(fn(_cfg(), _inputs())))
    except urllib.error.HTTPError as e:
        print(json.dumps({"error": "HTTP " + str(e.code), "detail": e.read().decode("utf-8", "replace")}))
        sys.exit(1)
    except Exception as e:
        print(json.dumps({"error": str(e)}))
        sys.exit(1)


def main(cfg, inputs):
    title = inputs.get("title")
    if not title:
        raise Exception("title is required")
    text = inputs.get("text")
    if not text:
        raise Exception("text is required")
    alert_type = inputs.get("alert_type")
    body = {
        "title": title,
        "text": text,
        "alert_type": (alert_type or "info"),
    }
    tags_raw = inputs.get("tags")
    if tags_raw:
        tags_list = [s.strip() for s in str(tags_raw).split(",") if s.strip()]
        if tags_list:
            body["tags"] = tags_list
    return request("POST", "/api/v1/events", cfg, body=body)


_run(main)
