// Copyright 2016 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package prober

import (
	"context"

	"github.com/go-kit/log"
	"github.com/prometheus/client_golang/prometheus"

	"github.com/prometheus/blackbox_exporter/config"
)

type ProbeFn func(ctx context.Context, target string, config config.Module, registry *prometheus.Registry, logger log.Logger) bool

const (
	helpSSLEarliestCertExpiry     = "Returns last SSL chain expiry in unixtime"
	helpSSLChainExpiryInTimeStamp = "Returns last SSL chain expiry in timestamp"
	helpProbeTLSInfo              = "Returns the TLS version used or NaN when unknown"
)

var (
	sslEarliestCertExpiryGaugeOpts = prometheus.GaugeOpts{
		Name: "probe_ssl_earliest_cert_expiry",
		Help: helpSSLEarliestCertExpiry,
	}

	sslChainExpiryInTimeStampGaugeOpts = prometheus.GaugeOpts{
		Name: "probe_ssl_last_chain_expiry_timestamp_seconds",
		Help: helpSSLChainExpiryInTimeStamp,
	}

	probeTLSInfoGaugeOpts = prometheus.GaugeOpts{
		Name: "probe_tls_version_info",
		Help: helpProbeTLSInfo,
	}
)
