package command

import (
	"log"
	"net/url"
	"os"

	"gitlab.com/wpetit/scaffold/internal/template"

	"github.com/manifoldco/promptui"
	"gitlab.com/wpetit/scaffold/internal/project"

	"github.com/pkg/errors"
	"github.com/urfave/cli/v2"
)

func newProjectCommand() *cli.Command {
	return &cli.Command{
		Name:      "new",
		Aliases:   []string{"n"},
		Usage:     "generate a new project from a given template url",
		ArgsUsage: "<URL>",
		Flags: []cli.Flag{
			&cli.StringFlag{
				Name:    "directory",
				Aliases: []string{"d"},
				Usage:   "Set destination to `DIR`",
				Value:   "./",
			},
			&cli.StringFlag{
				Name:    "manifest",
				Aliases: []string{"m"},
				Usage:   "The scaffold manifest `FILE`",
				Value:   "scaffold.yml",
			},
		},
		Action: newProjectAction,
	}
}

func newProjectAction(c *cli.Context) error {
	rawURL := c.Args().First()

	projectURL, err := url.Parse(rawURL)
	if err != nil {
		return errors.Wrap(err, "could not parse url")
	}

	availableFetchers := []project.Fetcher{
		project.NewGitFetcher(),
		project.NewLocalFetcher(),
	}

	var fetcher project.Fetcher

	for _, f := range availableFetchers {
		if f.Match(projectURL) {
			fetcher = f
			break
		}
	}

	vfs, err := fetcher.Fetch(projectURL)
	if err != nil {
		return errors.Wrap(err, "could not fetch project")
	}

	manifestFile := c.String("manifest")

	manifestStat, err := vfs.Stat(manifestFile)
	if err != nil && !os.IsNotExist(err) {
		return errors.Wrap(err, "could not stat manifest file")
	}

	templateData := make(map[string]interface{})

	if os.IsNotExist(err) {
		log.Println("Could not find scaffold manifest.")
	} else {
		if manifestStat.IsDir() {
			return errors.New("scaffold manifest is not a file")
		}

		log.Println("Loading template scaffold manifest...")
	}

	directory := c.String("directory")

	return template.CopyDir(vfs, ".", directory, &template.Option{
		TemplateData:   templateData,
		TemplateExt:    ".gotpl",
		IgnorePatterns: []string{manifestFile},
	})
}

func promptForProjectName() (string, error) {
	validate := func(input string) error {
		if input == "" {
			return errors.New("Project name cannot be empty")
		}

		return nil
	}

	prompt := promptui.Prompt{
		Label:    "Project Name",
		Validate: validate,
	}

	return prompt.Run()
}

func promptForProjectNamespace() (string, error) {
	validate := func(input string) error {
		if input == "" {
			return errors.New("Project namespace cannot be empty")
		}

		return nil
	}

	prompt := promptui.Prompt{
		Label:    "Project namespace",
		Validate: validate,
	}

	return prompt.Run()
}

func promptForProjectType() (string, error) {
	prompt := promptui.Select{
		Label: "Project Type",
		Items: []string{"web"},
	}

	_, result, err := prompt.Run()

	return result, err
}