#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright (C) 2019 tribe29 GmbH - License: GNU General Public License v2
# This file is part of Checkmk (https://checkmk.com). It is subject to the terms and
# conditions defined in the file COPYING, which is part of this source code package.

# NOTE: Careful when replacing the *-import below with a more specific import. This can cause
# problems because it might remove variables from the check-context which are necessary for
# resolving legacy discovery results such as [("SUMMARY", "diskstat_default_levels")]. Furthermore,
# it might also remove variables needed for accessing discovery rulesets.
from cmk.base.check_legacy_includes.couchbase import *  # pylint: disable=wildcard-import,unused-wildcard-import


@get_parsed_item_data
def check_couchbase_nodes_cache(item, params, data):

    misses = data.get("ep_bg_fetched")
    hits = data.get("get_hits")
    if None in (misses, hits):
        return
    total = misses + hits
    hit_perc = (hits / float(total)) * 100.0 if total != 0 else 100.0
    miss_rate = get_rate("%s.cache_misses" % item, time.time(), misses)

    yield check_levels(
        miss_rate,
        "cache_misses_rate",
        params.get("cache_misses"),
        human_readable_func=str,
        unit="/s",
        infoname="Cache misses",
    )

    yield check_levels(
        hit_perc,
        "cache_hit_ratio",
        (None, None) + params.get("cache_hits", (None, None)),
        human_readable_func=get_percent_human_readable,
        infoname="Cache hits",
        boundaries=(0, 100),
    )


check_info["couchbase_nodes_cache"] = {
    "parse_function": parse_couchbase_lines,
    "inventory_function": discover(lambda k, v: "get_hits" in v and "ep_bg_fetched" in v),
    "check_function": check_couchbase_nodes_cache,
    "service_description": "Couchbase %s Cache",
    "group": "couchbase_cache",
    "has_perfdata": True,
}
