//go:build dump_metrics

package metrics

import (
	"encoding/json"
	"flag"
	"os"
	"testing"

	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
	"github.com/stretchr/testify/require"
)

type mock struct{}

func (m mock) Statistic() pool.Statistic {
	return pool.Statistic{}
}

var metricsPath = flag.String("out", "", "File to export http gateway metrics to.")

func TestDescribeAll(t *testing.T) {
	// to check correct metrics type mapping
	_ = NewGateMetrics(mock{})

	flag.Parse()

	require.NotEmpty(t, metricsPath, "flag 'out' must be provided to dump metrics description")

	desc := DescribeAll()
	data, err := json.Marshal(desc)
	require.NoError(t, err)

	err = os.WriteFile(*metricsPath, data, 0644)
	require.NoError(t, err)
}