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


def _cfg():
    s = json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
    region = str(s.get("region") or "us").strip().lower()
    base = "https://" + region + ".api.insight.rapid7.com/"
    headers = {"X-Api-Key": s.get("api_key", ""), "Content-Type": "application/json", "Accept": "application/json"}
    return base, headers


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


def _prune(d):
    return {k: v for k, v in d.items() if v not in (None, "", {}, [])}


def _list(v):
    if v in (None, ""):
        return []
    if isinstance(v, list):
        return [str(x).strip() for x in v if str(x).strip()]
    return [p.strip() for p in str(v).split(",") if p.strip()]


def request(method, path, body=None):
    base, headers = _cfg()
    data = json.dumps(body).encode("utf-8") if body is not None else None
    req = urllib.request.Request(base + path.lstrip("/"), 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():
    inp = _inputs()
    # The Comments API addresses its target by RRN only. The short investigation ID
    # the v1 endpoints accept is rejected here, and the API answers 400 without
    # naming the parameter — so refuse it up front with the reason.
    target = str(inp.get("investigation_id") or "").strip()
    if not target:
        raise ValueError("investigation_id is required: the RRN of the investigation to comment on")
    if not target.startswith("rrn:"):
        raise ValueError(
            "investigation_id must be an RRN (rrn:investigation:<region>:<org>:investigation:<id>), "
            "not the short investigation ID: the Comments API targets a resource by RRN. Got " + repr(target)
        )
    comment = inp.get("comment")
    attachments = _list(inp.get("attachments"))
    if comment in (None, "") and not attachments:
        raise ValueError("comment is required (or attachments, to post a comment carrying only files)")
    body = _prune({
        "target": target,
        "body": comment,
        "attachments": attachments,
    })
    print(json.dumps(request("POST", "idr/v1/comments", body=body)))


try:
    run()
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)