#!/usr/bin/env python3
# Copyright (C) 2019 Checkmk 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.


from cmk.base.check_api import LegacyCheckDefinition
from cmk.base.check_legacy_includes.aws import check_aws_limits, parse_aws_limits_generic
from cmk.base.config import check_info

import cmk.plugins.aws.constants as aws_types  # pylint: disable=cmk-module-layer-violation

default_running_ondemand_instances = [
    (inst_type, (None, 80.0, 90.0)) for inst_type in aws_types.AWSEC2InstTypes
]

default_running_ondemand_instance_families = [
    ("%s_vcpu" % inst_fam, (None, 80.0, 90.0)) for inst_fam in aws_types.AWSEC2InstFamilies
]


def _transform_ec2_limits(params):
    # Check default reset
    def instance_limits(limits):
        return {"running_ondemand_instances_%s" % inst_type: levels for inst_type, levels in limits}

    transformed = instance_limits(default_running_ondemand_instances)
    transformed.update(instance_limits(default_running_ondemand_instance_families))

    for k, v in params.items():
        if isinstance(v, tuple):
            transformed[k] = v
        elif isinstance(v, list):
            transformed.update(instance_limits(v))
    return transformed


def check_aws_ec2_limits(item, params, parsed):
    if not (region_data := parsed.get(item)):
        return
    # params look like:
    # {'vpc_sec_group_rules': (50, 80.0, 90.0),
    #  'running_ondemand_instances': [('a1.4xlarge', (20, 80.0, 90.0))]}
    params = _transform_ec2_limits(params)
    yield from check_aws_limits("ec2", params, region_data)


def discover_aws_ec2_limits(section):
    yield from ((item, {}) for item in section)


check_info["aws_ec2_limits"] = LegacyCheckDefinition(
    parse_function=parse_aws_limits_generic,
    service_name="AWS/EC2 Limits %s",
    discovery_function=discover_aws_ec2_limits,
    check_function=check_aws_ec2_limits,
    check_ruleset_name="aws_ec2_limits",
    check_default_parameters={
        "vpc_elastic_ip_addresses": (None, 80.0, 90.0),
        "elastic_ip_addresses": (None, 80.0, 90.0),
        "vpc_sec_group_rules": (None, 80.0, 90.0),
        "vpc_sec_groups": (None, 80.0, 90.0),
        "if_vpc_sec_group": (None, 80.0, 90.0),
        "spot_inst_requests": (None, 80.0, 90.0),
        "active_spot_fleet_requests": (None, 80.0, 90.0),
        "spot_fleet_total_target_capacity": (None, 80.0, 90.0),
        "running_ondemand_instances_total": (None, 80.0, 90.0),
        "running_ondemand_instances": default_running_ondemand_instances,
        "running_ondemand_instances_vcpus": default_running_ondemand_instance_families,
    },
)
