// Package version carries build identification for the binary.
package version

import (
	"fmt"
	"runtime"
	"runtime/debug"
)

// These are overridable at build time with -ldflags.
var (
	Version   = "0.1.0"
	Commit    = ""
	BuildDate = ""
)

// Name is the product name shown in the UI and on the CLI.
const Name = "VibeDNS"

func init() {
	if Commit != "" {
		return
	}
	info, ok := debug.ReadBuildInfo()
	if !ok {
		return
	}
	for _, s := range info.Settings {
		switch s.Key {
		case "vcs.revision":
			if len(s.Value) > 12 {
				Commit = s.Value[:12]
			} else {
				Commit = s.Value
			}
		case "vcs.time":
			if BuildDate == "" {
				BuildDate = s.Value
			}
		}
	}
}

// Short returns just the semantic version.
func Short() string { return Version }

// Long returns a multi-line description suitable for `vibedns version`.
func Long() string {
	s := fmt.Sprintf("%s %s\n", Name, Version)
	if Commit != "" {
		s += fmt.Sprintf("commit:  %s\n", Commit)
	}
	if BuildDate != "" {
		s += fmt.Sprintf("built:   %s\n", BuildDate)
	}
	s += fmt.Sprintf("go:      %s\n", runtime.Version())
	s += fmt.Sprintf("platform: %s/%s\n", runtime.GOOS, runtime.GOARCH)
	return s
}

// UserAgent identifies the server in outbound HTTP requests.
func UserAgent() string { return Name + "/" + Version }