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


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


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


def request(method, path, cfg, body=None, params=None):
    url = str(cfg.get("base_url", "")).rstrip("/") + "/api/v4" + 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 " + str(cfg.get("token", "")), "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=60) as r:
        raw = r.read()
        return json.loads(raw) if raw else {}


def _run(fn):
    try:
        print(json.dumps(fn(_cfg(), _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(cfg, inputs):
    team_id = inputs.get("team_id")
    name = inputs.get("name")
    display_name = inputs.get("display_name")
    channel_type = inputs.get("channel_type")
    if not team_id:
        raise Exception("team_id is required")
    if not name:
        raise Exception("name is required")
    if not display_name:
        raise Exception("display_name is required")

    return request(
        "POST",
        "/channels",
        cfg,
        body={
            "team_id": team_id,
            "name": name,
            "display_name": display_name,
            "type": (channel_type or "O"),
        },
    )


_run(main)