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

BASE = "https://my.imperva.com/api/prov/v1"


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


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


def post(path, cfg, fields=None):
    body = {"api_id": str(cfg.get("api_id", "")), "api_key": str(cfg.get("api_key", ""))}
    if fields:
        body.update({k: v for k, v in fields.items() if v not in (None, "")})
    data = urllib.parse.urlencode(body).encode("utf-8")
    req = urllib.request.Request(BASE + path, data=data,
                                 headers={"Content-Type": "application/x-www-form-urlencoded",
                                          "Accept": "application/json"}, method="POST")
    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):
    site_id = inputs.get("site_id")
    if not site_id:
        raise Exception("site_id is required")
    ips = inputs.get("ips")
    if not ips:
        raise Exception("ips is required")
    return post("/sites/configure/acl", cfg, {
        "site_id": site_id,
        "rule_id": "api.acl.blacklisted_ips",
        "ips": ips,
    })


_run(main)