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

SECRETS = json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
INPUTS = json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
BASE = SECRETS.get("base_url", "https://api.crowdstrike.com").rstrip("/")


def token():
    data = urllib.parse.urlencode({"client_id": SECRETS.get("client_id", ""), "client_secret": SECRETS.get("client_secret", "")}).encode()
    req = urllib.request.Request(BASE + "/oauth2/token", data=data, headers={"Content-Type": "application/x-www-form-urlencoded", "Accept": "application/json"}, method="POST")
    with urllib.request.urlopen(req, timeout=30) as r:
        return json.loads(r.read()).get("access_token", "")


def call(method, path, tok, params=None, body=None):
    url = BASE + path
    if params:
        # params is a list of (key, value) tuples to allow repeated keys (e.g. ids)
        url += "?" + urllib.parse.urlencode(params)
    data = json.dumps(body).encode() if body is not None else None
    headers = {"Authorization": "Bearer " + tok, "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) as r:
        raw = r.read()
        return json.loads(raw) if raw else {}


def csv(v):
    return [x.strip() for x in str(v or "").split(",") if x.strip()]


def main():
    tok = token()
    ids = INPUTS.get("ids", "")
    filter_ = INPUTS.get("filter", "")
    limit = INPUTS.get("limit", "")
    offset = INPUTS.get("offset", "")

    if ids:
        result = call("GET", "/ods/entities/scan-hosts/v1", tok, params=[("ids", x) for x in csv(ids)])
    else:
        params = []
        if filter_:
            params.append(("filter", filter_))
        if limit:
            params.append(("limit", limit))
        if offset:
            params.append(("offset", offset))
        query_res = call("GET", "/ods/queries/scan-hosts/v1", tok, params=params or None)
        resources = query_res.get("resources", [])
        if resources:
            result = call("GET", "/ods/entities/scan-hosts/v1", tok, params=[("ids", x) for x in resources])
        else:
            result = {"resources": []}
    print(json.dumps(result))


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)