version

var (
	Version = "dev"     // Default value if not built with ldflags
	Commit  = "none"    // Default value
	Date    = "unknown" // Default value
)

var VersionCmd = &cobra.Command{
	Use:   "version",
	Short: "Print the version number of eng and check for updates",
	Long: `All software has versions. This is eng's.
It shows the Git tag, commit hash, build date, Go version, OS/Arch,
and checks GitHub for the latest available release.`,
	Run: func(cmd *cobra.Command, args []string) {

		fmt.Printf("eng version: %s\n", Version)
		fmt.Printf("  Git Commit: %s\n", Commit)
		fmt.Printf("  Build Date: %s\n", Date)
		fmt.Printf("  Go Version: %s\n", runtime.Version())
		fmt.Printf("  OS/Arch:    %s/%s\n", runtime.GOOS, runtime.GOARCH)
		fmt.Println()

		fmt.Println("Checking for latest version...")
		latestRelease, err := getLatestRelease(githubRepoOwner, githubRepoName)
		if err != nil {
			fmt.Printf("  Warning: Could not check for updates: %v\n", err)
			return
		}

		if latestRelease == nil || latestRelease.TagName == "" {
			fmt.Println("  Could not determine latest release version.")
			return
		}

		if Version == "dev" {
			fmt.Printf("  Currently running development version.\n")
			fmt.Printf("  Latest release is %s: %s\n", latestRelease.TagName, latestRelease.HTMLURL)
			return
		}

		currentSemVer, err := semver.NewVersion(Version)
		if err != nil {
			fmt.Printf("  Warning: Could not parse current version (%s) for comparison: %v\n", Version, err)
			fmt.Printf("  Latest release is %s: %s\n", latestRelease.TagName, latestRelease.HTMLURL)
			return
		}

		latestSemVer, err := semver.NewVersion(latestRelease.TagName)
		if err != nil {
			fmt.Printf("  Warning: Could not parse latest release tag (%s) for comparison: %v\n", latestRelease.TagName, err)
			return
		}

		if latestSemVer.GreaterThan(currentSemVer) {
			fmt.Printf("  A newer version is available: %s\n", latestRelease.TagName)
			fmt.Printf("  Get it here: %s\n", latestRelease.HTMLURL)
		} else if latestSemVer.Equal(currentSemVer) {
			fmt.Println("  You are running the latest version.")
		} else {

			fmt.Printf("  You are running a version newer than the latest release (%s).\n", latestRelease.TagName)
		}
	},
}