package recipe

import (
	"fmt"
	"os/exec"
	"path"

	"coopcloud.tech/abra/cli/internal"
	"coopcloud.tech/abra/pkg/autocomplete"
	"coopcloud.tech/abra/pkg/config"
	"github.com/sirupsen/logrus"
	"github.com/urfave/cli"
)

// getGitDiffArgs builds the `git diff` invocation args
func getGitDiffArgs(repoPath string) []string {
	return []string{
		"-C",
		repoPath,
		"--no-pager",
		"-c",
		"color.diff=always",
		"diff",
	}
}

var recipeDiffCommand = cli.Command{
	Name:        "diff",
	Usage:       "Show unstaged changes in recipe config",
	Description: "Due to limitations in our underlying Git dependency, this command requires /usr/bin/git.",
	Aliases:     []string{"d"},
	ArgsUsage:   "<recipe>",
	Flags: []cli.Flag{
		internal.DebugFlag,
		internal.NoInputFlag,
	},
	Before:       internal.SubCommandBefore,
	BashComplete: autocomplete.RecipeNameComplete,
	Action: func(c *cli.Context) error {
		recipeName := c.Args().First()

		if recipeName != "" {
			internal.ValidateRecipe(c)
		}

		_, err := exec.LookPath("git")
		if err != nil {
			logrus.Fatal("unable to locate 'git' command?")
		}

		gitDiffArgs := getGitDiffArgs(path.Join(config.RECIPES_DIR, recipeName))
		diff, err := exec.Command("git", gitDiffArgs...).Output()
		if err != nil {
			logrus.Fatal(err)
		}

		fmt.Print(string(diff))

		return nil
	},
}