import json, os, sys, base64, 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 (str(cfg.get("url") or "https://tap-api-v2.proofpoint.com")).rstrip("/") + "/v2"


def _auth_header(cfg):
    raw = str(cfg.get("service_principal", "")) + ":" + str(cfg.get("secret", ""))
    return "Basic " + base64.b64encode(raw.encode("utf-8")).decode("utf-8")


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 = {"Authorization": _auth_header(cfg), "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=90) 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 _time_params(inputs):
    interval = inputs.get("interval")
    if interval:
        return {"format": "json", "interval": interval}
    since_seconds = inputs.get("since_seconds")
    try:
        since = int(since_seconds) if since_seconds not in (None, "") else 3600
    except Exception:
        since = 3600
    since = max(60, min(3600, since))
    return {"format": "json", "sinceSeconds": since}


def main(cfg, inputs):
    return request("GET", "/siem/clicks/permitted", cfg, params=_time_params(inputs))


_run(main)
