package main

import (
	"errors"
	"fmt"
	"log"
	"os"
	"runtime"

	selfupdate "github.com/creativeprojects/go-selfupdate"
)

//go:generate sh injectGitVars.sh

var version = "v0.1.0"

func main() {
	if len(os.Args) < 2 {
		fmt.Println("provide a command")
		os.Exit(1)
	} else if os.Args[1] == "upgrade" {
		fmt.Print("Trying Upgrade... ")
		update(gitTag)
	} else if os.Args[1] == "version" {
		fmt.Print("Version ")
		fmt.Println(gitTag)
	} else {
		fmt.Println("provide a valid command (version or upgrade)")
	}
}

func update(version string) error {
	latest, found, err := selfupdate.DetectLatest("lbsadmin/goselfupdatetest")
	if err != nil {
		return fmt.Errorf("error occurred while detecting version: %v", err)
	}
	if !found {
		return fmt.Errorf("latest version for %s/%s could not be found from github repository", runtime.GOOS, runtime.GOARCH)
	}

	if latest.LessOrEqual(version) {
		log.Printf("Current version (%s) is the latest", version)
		return nil
	}

	exe, err := os.Executable()
	if err != nil {
		return errors.New("could not locate executable path")
	}
	if err := selfupdate.UpdateTo(latest.AssetURL, latest.AssetName, exe); err != nil {
		return fmt.Errorf("error occurred while updating binary: %v", err)
	}
	log.Printf("Successfully updated to version %s", latest.Version())
	return nil
}