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

API = "https://graph.microsoft.com/v1.0"


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


def _token():
    cfg = _cfg()
    data = urllib.parse.urlencode({
        "grant_type": "client_credentials",
        "client_id": str(cfg.get("client_id") or ""),
        "client_secret": str(cfg.get("client_secret") or ""),
        "scope": "https://graph.microsoft.com/.default",
    }).encode("utf-8")
    url = "https://login.microsoftonline.com/" + str(cfg.get("tenant_id") or "") + "/oauth2/v2.0/token"
    req = urllib.request.Request(url, data=data,
                                 headers={"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, params=None, body=None, extra_headers=None, token=None):
    url = API + path
    q = {k: str(x) for k, x in (params or {}).items() if x not in (None, "")}
    if q:
        url += ("&" if "?" in url else "?") + urllib.parse.urlencode(q)
    data = json.dumps(body).encode("utf-8") if body is not None else None
    headers = {"Accept": "application/json", "Authorization": "Bearer " + (token or _token())}
    if data is not None:
        headers["Content-Type"] = "application/json"
    if extra_headers:
        headers.update(extra_headers)
    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 main():
    inputs = json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
    filt = inputs.get("filter")
    search = inputs.get("search")
    limit = inputs.get("limit", 50)

    params = {"$top": limit}
    extra_headers = None
    if filt:
        params["$filter"] = filt
        extra_headers = {"ConsistencyLevel": "eventual"}
    if search:
        params["$search"] = "\"" + str(search) + "\""
        extra_headers = {"ConsistencyLevel": "eventual"}

    resp = request("GET", "/users", params=params, extra_headers=extra_headers)
    print(json.dumps(resp))


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)