package runtime

import (
	"fmt"
	"os"
	"strconv"

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

// V1Mode is false by default for Helmfile v0.x and
// true by default for Helmfile v1.x
var (
	V1Mode bool

	// We set this via ldflags at build-time so that we can use the
	// value specified at the build time as the runtime default.
	v1Mode string
)

func Info() string {
	return fmt.Sprintf("V1 mode = %v", V1Mode)
}

func init() {
	// You can toggle the V1 mode at runtime via an envvar:
	// - Helmfile v1.x behaves like v0.x by running it with HELMFILE_V1MODE=false
	// - Helmfile v0.x behaves like v1.x by with HELMFILE_V1MODE=true
	switch os.Getenv(envvar.V1Mode) {
	case "true":
		V1Mode = true
	case "false":
		V1Mode = false
	default:
		V1Mode, _ = strconv.ParseBool(v1Mode)
	}
}