import json, os, sys, ssl, 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 _ctx(cfg):
    if cfg.get("insecure"):
        c = ssl.create_default_context()
        c.check_hostname = False
        c.verify_mode = ssl.CERT_NONE
        return c
    return None


def _root(cfg):
    return str(cfg.get("base_url", "")).rstrip("/")


def _base(cfg):
    return _root(cfg) + "/ProtectManager/webservices/v2"


def _token(cfg):
    form = urllib.parse.urlencode({
        "grant_type": "password",
        "username": cfg.get("username", ""),
        "password": cfg.get("password", ""),
    }).encode("utf-8")
    req = urllib.request.Request(_root(cfg) + "/ProtectManager/oauth/token", data=form,
                                 headers={"Content-Type": "application/x-www-form-urlencoded",
                                          "Accept": "application/json"}, method="POST")
    with urllib.request.urlopen(req, timeout=60, context=_ctx(cfg)) as r:
        tok = json.loads(r.read())
    if not tok.get("access_token"):
        raise Exception("Auth failed: " + json.dumps(tok))
    return tok["access_token"]


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=90, context=_ctx(cfg)) 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)


q = lambda v: urllib.parse.quote(str(v), safe="")


def main(cfg, token, inputs):
    incident_id = inputs.get("incident_id")
    if not incident_id:
        raise Exception("incident_id is required")
    status = inputs.get("status")
    severity = inputs.get("severity")
    patch = {}
    if status not in (None, ""):
        patch["incidentStatusId"] = status
    if severity not in (None, ""):
        patch["severityId"] = severity
    if not patch:
        raise Exception("status or severity is required")
    response = request("PATCH", "/incidents/" + q(incident_id), cfg, token, body=patch)
    if not response:
        return {"ok": True, "incident_id": incident_id}
    return response


_run(main)
