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

# Assignment rides the same alertTriggerActions mutation as the status and
# verdict updates, with the assignUser payload. The action id is the console's,
# and can be overridden for a tenant that names it differently.
DEFAULT_ACTION_ID = "S1/alert/assignUser"

MUTATION = """mutation AlertTriggerActions($id: String!, $actionId: String!, $user: ID!) {
  alertTriggerActions(
    filter: { or: [ { and: [ { fieldId: "id", stringEqual: { value: $id } } ] } ] },
    actions: [ { id: $actionId, payload: { assignUser: { value: $user } } } ]
  ) {
    __typename
    ... on ActionsTriggered {
      actions { actionId alertCount
        success { id }
        failure { id errorType errorMessage }
        skip { id } }
    }
  }
}"""


def request(method, url, headers, body=None):
    data = json.dumps(body).encode("utf-8") if body is not None else None
    req = urllib.request.Request(url, data=data, headers=headers, method=method)
    with urllib.request.urlopen(req, timeout=30) as resp:
        raw = resp.read()
        return json.loads(raw) if raw else {}


def main():
    secrets = json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
    inputs = json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
    base = secrets.get("url", "").rstrip("/") + "/web/api/v2.1"
    headers = {
        "Authorization": "ApiToken " + secrets.get("api_token", ""),
        "Accept": "application/json",
        "Content-Type": "application/json",
    }
    alert_id = str(inputs.get("alert_id") or "").strip()
    user_id = str(inputs.get("assignee_user_id") or "").strip()
    if not alert_id or not user_id:
        raise ValueError("alert_id and assignee_user_id are required")

    variables = {
        "id": alert_id,
        "actionId": str(inputs.get("action_id") or "").strip() or DEFAULT_ACTION_ID,
        # The console types the user id as an ID, which accepts the number it
        # returns in assignee.userId as well as its string form.
        "user": int(user_id) if user_id.isdigit() else user_id,
    }
    resp = request("POST", base + "/unifiedalerts/graphql", headers, {"query": MUTATION, "variables": variables})
    if resp.get("errors"):
        print(json.dumps({"error": "GraphQL error", "detail": resp["errors"]}))
        sys.exit(1)
    print(json.dumps({"alert_id": alert_id, "assignee_user_id": user_id, "result": resp.get("data") or {}}))


try:
    main()
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)