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

_UNITS = {"second": 1, "minute": 60, "hour": 3600, "day": 86400, "week": 604800, "month": 2592000, "year": 31536000}


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 _rel_ms_range(text):
    if not text:
        return None, None
    num = unit = None
    for t in str(text).lower().replace("last", "").split():
        if t.isdigit():
            num = int(t)
        elif t.rstrip("s") in _UNITS:
            unit = t.rstrip("s")
    if num is None or not unit:
        return None, None
    now_ms = int(time.time() * 1000)
    return now_ms - num * _UNITS[unit] * 1000, now_ms


def request(method, url, params=None):
    base, headers = _cfg()
    full = url if url.startswith("http") else base + url.lstrip("/")
    if params:
        clean = {k: v for k, v in params.items() if v not in (None, "")}
        if clean:
            full += ("&" if "?" in full else "?") + urllib.parse.urlencode(clean, doseq=True)
    req = urllib.request.Request(full, headers=headers, method=method)
    with urllib.request.urlopen(req, timeout=90) as r:
        raw = r.read()
        return json.loads(raw) if raw else {}


def _collect(first):
    # Follow the query's pagination links until no more pages remain.
    events = []
    queue = [first]
    while queue:
        page = queue.pop(0)
        events.extend(page.get("events", []) or [])
        for link in page.get("links", []) or []:
            href = link.get("href")
            if href:
                queue.append(request("GET", href))
    return events


def run():
    inp = _inputs()
    start_time = inp.get("start_time")
    end_time = inp.get("end_time")
    if inp.get("time_range"):
        start_time, end_time = _rel_ms_range(inp.get("time_range"))
    params = {
        "query": inp.get("query"),
        "from": start_time,
        "to": end_time,
        "per_page": inp.get("logs_per_page"),
        "sequence_number": inp.get("sequence_number"),
    }
    log_id = inp.get("log_id", "")
    first = request("GET", "log_search/query/logs/" + urllib.parse.quote(log_id, safe=""), params=params)
    print(json.dumps({"events": _collect(first)}))


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)