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 (str(cfg.get("base_url") or "https://api.us.onelogin.com")).rstrip("/")


def _token(cfg):
    body = json.dumps({"grant_type": "client_credentials"}).encode("utf-8")
    auth = "client_id:" + str(cfg.get("client_id", "")) + ", client_secret:" + str(cfg.get("client_secret", ""))
    req = urllib.request.Request(_base(cfg) + "/auth/oauth2/v2/token", data=body,
                                 headers={"Authorization": auth, "Content-Type": "application/json",
                                          "Accept": "application/json"}, method="POST")
    with urllib.request.urlopen(req, timeout=60) as r:
        tok = json.loads(r.read())
    at = tok.get("access_token")
    if not at:
        raise Exception("Token request failed: " + json.dumps(tok))
    return at


def request(method, path, cfg, token, 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": "bearer " + token, "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:
        cfg = _cfg()
        inputs = _inputs()
        token = _token(cfg)
        print(json.dumps(fn(cfg, token, 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, token, inputs):
    email = inputs.get("email")
    limit = inputs.get("limit")
    return request("GET", "/api/2/users", cfg, token, params={"email": email, "limit": int(limit or 50)})


_run(main)
