// Package metrics provides monitoring of the GitHub related metrics.
//
// This depends on the metrics exporter of kubebuilder.
// See https://book.kubebuilder.io/reference/metrics.html for details.
package actionsmetrics

import (
	"github.com/prometheus/client_golang/prometheus"
	"sigs.k8s.io/controller-runtime/pkg/metrics"
)

func init() {
	metrics.Registry.MustRegister(
		githubWorkflowJobQueueDurationSeconds,
		githubWorkflowJobRunDurationSeconds,
		githubWorkflowJobConclusionsTotal,
		githubWorkflowJobsQueuedTotal,
		githubWorkflowJobsStartedTotal,
		githubWorkflowJobsCompletedTotal,
		githubWorkflowJobFailuresTotal,
	)
}

var runtimeBuckets []float64 = []float64{
	0.01,
	0.05,
	0.1,
	0.5,
	1,
	2,
	3,
	4,
	5,
	6,
	7,
	8,
	9,
	10,
	12,
	15,
	18,
	20,
	25,
	30,
	40,
	50,
	60,
	70,
	80,
	90,
	100,
	110,
	120,
	150,
	180,
	210,
	240,
	300,
	360,
	420,
	480,
	540,
	600,
	900,
	1200,
	1800,
	2400,
	3000,
	3600,
}

func metricLabels(extras ...string) []string {
	return append(append([]string{}, commonLabels...), extras...)
}

var (
	commonLabels                          = []string{"runs_on", "job_name", "organization", "repository", "repository_full_name", "owner", "workflow_name", "head_branch"}
	githubWorkflowJobQueueDurationSeconds = prometheus.NewHistogramVec(
		prometheus.HistogramOpts{
			Name:    "github_workflow_job_queue_duration_seconds",
			Help:    "Queue times for workflow jobs in seconds",
			Buckets: runtimeBuckets,
		},
		metricLabels(),
	)
	githubWorkflowJobRunDurationSeconds = prometheus.NewHistogramVec(
		prometheus.HistogramOpts{
			Name:    "github_workflow_job_run_duration_seconds",
			Help:    "Run times for workflow jobs in seconds",
			Buckets: runtimeBuckets,
		},
		metricLabels("job_conclusion"),
	)
	githubWorkflowJobConclusionsTotal = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Name: "github_workflow_job_conclusions_total",
			Help: "Conclusions for tracked workflow jobs",
		},
		metricLabels("job_conclusion"),
	)
	githubWorkflowJobsQueuedTotal = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Name: "github_workflow_jobs_queued_total",
			Help: "Total count of workflow jobs queued (events where job_status=queued)",
		},
		metricLabels(),
	)
	githubWorkflowJobsStartedTotal = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Name: "github_workflow_jobs_started_total",
			Help: "Total count of workflow jobs started (events where job_status=in_progress)",
		},
		metricLabels(),
	)
	githubWorkflowJobsCompletedTotal = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Name: "github_workflow_jobs_completed_total",
			Help: "Total count of workflow jobs completed (events where job_status=completed)",
		},
		metricLabels(),
	)
	githubWorkflowJobFailuresTotal = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Name: "github_workflow_job_failures_total",
			Help: "Conclusions for tracked workflow runs",
		},
		metricLabels("failed_step", "exit_code"),
	)
)