import json, os, sys, base64, urllib.parse, urllib.request, urllib.error

BASE = "https://api.intelligence.mandiant.com"


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


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


def _token(cfg):
    creds = str(cfg.get("api_key", "")) + ":" + str(cfg.get("secret_key", ""))
    basic = base64.b64encode(creds.encode("utf-8")).decode("utf-8")
    form = urllib.parse.urlencode({"grant_type": "client_credentials"}).encode("utf-8")
    req = urllib.request.Request(BASE + "/token", data=form, headers={
        "Authorization": "Basic " + basic,
        "Content-Type": "application/x-www-form-urlencoded",
        "Accept": "application/json",
    }, method="POST")
    with urllib.request.urlopen(req, timeout=60) as r:
        tok = json.loads(r.read())
    if not tok.get("access_token"):
        raise Exception("Token request failed: " + json.dumps(tok))
    return tok["access_token"]


def request(method, path, token, body=None, params=None):
    url = BASE + 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", "X-App-Name": "riposte-soar"}
    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 _run(fn):
    try:
        cfg = _cfg()
        inputs = _inputs()
        token = _token(cfg)
        print(json.dumps(fn(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)


def main(token, inputs):
    value = inputs.get("value")
    if not value:
        raise Exception("value is required")
    body = {"requests": [{"values": [value]}]}
    return request("POST", "/v4/indicator", token, body=body)


_run(main)
