package runtime

import (
	"fmt"
	"os"

	"github.com/helmfile/helmfile/pkg/envvar"
)

var (
	// GoYamlV3 is set to true in order to let Helmfile use
	// gopkg.in/yaml.v3 instead of gopkg.in/yaml.v2.
	// It's false by default in Helmfile v0.x and true in Helmfile v1.x.
	GoYamlV3 bool
)

func Info() string {
	yamlLib := "gopkg.in/yaml.v2"
	if GoYamlV3 {
		yamlLib = "gopkg.in/yaml.v3"
	}

	return fmt.Sprintf("YAML library = %v", yamlLib)
}

func init() {
	// You can switch the YAML library at runtime via an envvar:
	switch os.Getenv(envvar.GoYamlV3) {
	case "true":
		GoYamlV3 = true
	case "false":
		GoYamlV3 = false
	default:
		GoYamlV3 = true
	}
}