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

# The single-alert view of the UAM model. get_unified_alerts reads the list
# shape; this adds what the list cannot carry per alert: the indicators behind
# the detection, their MITRE mapping, the observables and the sibling alerts.
QUERY = """query GetAlertDetails($id: ID!) {
  alert(id: $id) {
    id externalId name description severity status classification confidenceLevel
    analystVerdict result detectedAt createdAt updatedAt firstSeenAt lastSeenAt
    storylineId attackSurfaces noteExists
    asset { id name osType osVersion agentVersion lastLoggedInUser }
    assignee { userId fullName email }
    detectionSource { vendor product engine }
    process { cmdLine parentName username file { name path md5 sha1 sha256 size } }
    indicators { uid type message severity eventTime
      attacks { tactic { name uid } technique { name uid } }
      observables { name value type typeName } }
    observables { name value type typeName }
    relatedAlerts { id name }
  }
}"""


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=60) 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()
    if not alert_id:
        raise ValueError("alert_id is required")

    body = {"query": QUERY, "variables": {"id": alert_id}}
    resp = request("POST", base + "/unifiedalerts/graphql", headers, body)
    # GraphQL answers 200 with an errors array; reported as an error rather than
    # printed as an empty alert, which would read as "this alert has no detail".
    if resp.get("errors"):
        print(json.dumps({"error": "GraphQL error", "detail": resp["errors"]}))
        sys.exit(1)
    print(json.dumps((resp.get("data") or {}).get("alert") 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)