version

var (
	// Version holds the application's version string (e.g., "0.1.0" or "dev").
	Version = "dev"
	// Commit holds the Git commit hash from which the application was built.
	Commit = "none"
	// Date holds the build date of the application.
	Date = "unknown"
)

var VersionCmd = &cobra.Command{
	Use:   "version",
	Short: "Print the version number of eng and check for updates",
	Long: `Displays the application's version, build commit, build date, Go version,
and target OS/Architecture.

It also checks the GitHub repository for the latest official release
and compares it with the currently running version.`,
	Run: func(cmd *cobra.Command, args []string) {
		log.Info("eng version: %s", Version)
		log.Message("  Git Commit: %s", Commit)
		log.Message("  Build Date: %s", Date)
		log.Message("  Go Version: %s", runtime.Version())
		log.Message("  OS/Arch:    %s/%s", runtime.GOOS, runtime.GOARCH)
		log.Message("")

		sp := utils.NewSpinner("Checking for latest version...")
		sp.Start()

		latestRelease, err := getLatestRelease(githubRepoOwner, githubRepoName)

		sp.Stop()

		if err != nil {
			log.Warn("Could not check for updates: %v", err)
			return
		}

		if latestRelease == nil || latestRelease.TagName == "" {
			log.Warn("Could not determine the latest release version from GitHub.")
			return
		}

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

		currentSemVer, err := semver.NewVersion(Version)
		if err != nil {
			log.Warn("Could not parse current version (%s) for comparison: %v", Version, err)

			log.Info("Latest release is %s: %s", latestRelease.TagName, latestRelease.HTMLURL)
			return
		}

		latestSemVer, err := semver.NewVersion(latestRelease.TagName)
		if err != nil {
			log.Warn("Could not parse latest release tag (%s) as semver: %v", latestRelease.TagName, err)

			log.Info("Latest release tag is: %s", latestRelease.TagName)
			log.Info("  Release page: %s", latestRelease.HTMLURL)
			return
		}

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

			log.Info("You are running a version newer than the latest official release (%s).", latestRelease.TagName)
		}
	},
}