package metrics

import "github.com/prometheus/client_golang/prometheus"

// Option is the functional interface that is used to provide public options for
// creating metrics structs.
type Option func(*options)

// WithCollectors adds custom collectors in addition to the built in controller
// metrics.
func WithCollectors(c ...prometheus.Collector) Option {
	return func(o *options) {
		o.customCollectors = c
	}
}

// WithSuspend adds a collector for recording an objects suspension status via
// Metrics.RecordSuspend()
func WithSuspend() Option {
	return func(o *options) {
		o.suspend = true
	}
}

// WithReason adds the `reason` label to the reconcile_condition_status gauge
func WithReason() Option {
	return func(o *options) {
		o.reason = true
	}
}

type options struct {
	// whether or not to add the gauge for recording object suspension
	suspend bool
	// whether or not to use the `reason` label in reconcile_condition_status
	reason           bool
	customCollectors []prometheus.Collector
}

func makeOptions(opts ...Option) *options {
	o := &options{customCollectors: []prometheus.Collector{}}
	for _, opt := range opts {
		opt(o)
	}

	return o
}