package commands

import (
	"os"

	"github.com/github/git-lfs/lfs"
	"github.com/spf13/cobra"
)

var (
	forceInstall      = false
	localInstall      = false
	systemInstall     = false
	skipSmudgeInstall = false
)

func installCommand(cmd *cobra.Command, args []string) {
	requireGitVersion()

	if localInstall {
		requireInRepo()
	}

	if systemInstall && os.Geteuid() != 0 {
		Print("WARNING: current user is not root/admin, system install is likely to fail.")
	}

	if localInstall && systemInstall {
		Exit("Only one of --local and --system options can be specified.")
	}

	opt := lfs.InstallOptions{Force: forceInstall, Local: localInstall, System: systemInstall}
	if skipSmudgeInstall {
		// assume the user is changing their smudge mode, so enable force implicitly
		opt.Force = true
	}

	if err := lfs.InstallFilters(opt, skipSmudgeInstall); err != nil {
		Error(err.Error())
		Exit("Run `git lfs install --force` to reset git config.")
	}

	if localInstall || lfs.InRepo() {
		installHooksCommand(cmd, args)
	}

	Print("Git LFS initialized.")
}

func installHooksCommand(cmd *cobra.Command, args []string) {
	updateForce = forceInstall
	updateCommand(cmd, args)
}

func init() {
	RegisterSubcommand(func() *cobra.Command {
		cmd := &cobra.Command{
			Use:    "install",
			PreRun: resolveLocalStorage,
			Run:    installCommand,
		}

		cmd.Flags().BoolVarP(&forceInstall, "force", "f", false, "Set the Git LFS global config, overwriting previous values.")
		cmd.Flags().BoolVarP(&localInstall, "local", "l", false, "Set the Git LFS config for the local Git repository only.")
		cmd.Flags().BoolVarP(&systemInstall, "system", "", false, "Set the Git LFS config in system-wide scope.")
		cmd.Flags().BoolVarP(&skipSmudgeInstall, "skip-smudge", "s", false, "Skip automatic downloading of objects on clone or pull.")
		cmd.AddCommand(&cobra.Command{
			Use:    "hooks",
			PreRun: resolveLocalStorage,
			Run:    installHooksCommand,
		})
		return cmd
	})
}