package cmd

import (
	"regexp"
	"strings"

	"go.jolheiser.com/gpm/config"

	"github.com/AlecAivazis/survey/v2"
	"github.com/urfave/cli/v2"
	"go.jolheiser.com/beaver"
)

var Add = cli.Command{
	Name:  "add",
	Usage: "Add a package",
	Flags: []cli.Flag{
		&cli.BoolFlag{
			Name:    "force",
			Aliases: []string{"f"},
			Usage:   "Overwrite existing package without prompt",
		},
	},
	Action: doAdd,
}

var vPattern = regexp.MustCompile(`v\d+$`)

func doAdd(ctx *cli.Context) error {
	cfg, err := config.Load()
	if err != nil {
		return err
	}

	goGetQuestion := &survey.Input{
		Message: "Package go-get import",
	}
	var goGetAnswer string

	if err := survey.AskOne(goGetQuestion, &goGetAnswer); err != nil {
		return err
	}

	goGet := strings.Split(goGetAnswer, "/")
	defaultName := goGet[len(goGet)-1]
	// Check if go-get is actually pointing to a versioned module
	if vPattern.MatchString(defaultName) {
		defaultName = goGet[len(goGet)-2]
	}

	nameQuestion := &survey.Input{
		Message: "Package name for gpm",
		Default: defaultName,
	}
	var nameAnswer string

	if err := survey.AskOne(nameQuestion, &nameAnswer); err != nil {
		return err
	}

	pkg := config.Package{
		Name:   nameAnswer,
		Import: goGetAnswer,
	}
	cfg.AddPackages(ctx.Bool("force"), pkg)

	if err := cfg.Save(); err != nil {
		return err
	}

	beaver.Infof("Added `%s` to local gpm.", nameAnswer)
	return nil
}