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


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


def _headers(cfg):
    h = {"Accept": "application/json", "Content-Type": "application/json"}
    if str(cfg.get("auth_type") or "basic").lower() == "oauth":
        data = urllib.parse.urlencode({
            "grant_type": "password",
            "client_id": cfg.get("client_id", ""),
            "client_secret": cfg.get("client_secret", ""),
            "username": cfg.get("username", ""),
            "password": cfg.get("password", ""),
        }).encode("utf-8")
        req = urllib.request.Request(
            cfg.get("url", "").rstrip("/") + "/oauth_token.do", 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("OAuth token request failed: " + json.dumps(tok))
        h["Authorization"] = "Bearer " + tok["access_token"]
    else:
        cred = (cfg.get("username", "") + ":" + cfg.get("password", "")).encode("utf-8")
        h["Authorization"] = "Basic " + base64.b64encode(cred).decode("ascii")
    return h


def main():
    cfg = _cfg()
    inputs = json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
    method = str(inputs.get("method") or "GET").upper()
    if method not in ("GET", "POST", "PATCH", "PUT", "DELETE"):
        raise Exception("Unsupported method: " + method)
    path = str(inputs.get("path") or "")
    if not path.startswith("/"):
        raise Exception("path must start with /")

    url = cfg.get("url", "").rstrip("/") + path
    params = inputs.get("params")
    if params:
        if isinstance(params, str):
            params = json.loads(params)
        q = {k: str(v) for k, v in params.items() if v not in (None, "")}
        if q:
            url += ("&" if "?" in url else "?") + urllib.parse.urlencode(q)

    body = inputs.get("body")
    data = None
    if body not in (None, ""):
        if isinstance(body, str):
            body = json.loads(body)
        data = json.dumps(body).encode("utf-8")

    req = urllib.request.Request(url, data=data, headers=_headers(cfg), method=method)
    with urllib.request.urlopen(req, timeout=90) as r:
        raw = r.read()
        print(json.dumps(json.loads(raw) if raw else {}))


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)
