package cli

import (
	"fmt"
	"io"
	"runtime"

	"github.com/spf13/cobra"
	"sneak.berlin/go/vaultik/internal/globals"
)

// NewVersionCommand creates the version command
func NewVersionCommand() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "version",
		Short: "Print version information",
		Long:  `Print version, git commit, and build information for vaultik.`,
		Args:  cobra.NoArgs,
		Run: func(cmd *cobra.Command, _ []string) {
			writeVersion(cmd.OutOrStdout())
		},
	}

	return cmd
}

// writeVersion prints the version report. It takes a writer rather than
// using os.Stdout directly so the output can be asserted on in tests.
func writeVersion(w io.Writer) {
	_, _ = fmt.Fprintf(w, "vaultik %s\n", globals.Version)
	_, _ = fmt.Fprintf(w, "  commit:     %s\n", globals.Commit)
	_, _ = fmt.Fprintf(w, "  build date: %s\n", globals.CommitDate)
	_, _ = fmt.Fprintf(w, "  go:         %s\n", runtime.Version())
	_, _ = fmt.Fprintf(w, "  os/arch:    %s/%s\n", runtime.GOOS, runtime.GOARCH)
	_, _ = fmt.Fprintf(w, "  author:     %s\n", globals.Author)
	_, _ = fmt.Fprintf(w, "  homepage:   %s\n", globals.Homepage)
	_, _ = fmt.Fprintf(w, "  license:    %s\n", globals.License)

	if globals.IsDevVersion(globals.Version) {
		_, _ = fmt.Fprintln(w)
		_, _ = fmt.Fprintln(w,
			"This is a development build: it was not built from a tagged")
		_, _ = fmt.Fprintln(w,
			"commit, so it carries no release version. Released binaries")
		_, _ = fmt.Fprintf(w,
			"are published at %s\n", globals.ReleasesURL)
		_, _ = fmt.Fprintln(w,
			"and report their tag on the first line above.")
	}
}