package cli

import (
	"fmt"
	"log"
	"os"
	"time"

	"github.com/pterm/pterm"
	"github.com/urfave/cli/v2"
)

type CLIApp struct {
	appname     string
	version     string
	buildarch   string
	startupTime time.Time
	exitCode    int
	errorString string
	app         *cli.App
}

func (m *CLIApp) printBanner() {
	s, _ := pterm.DefaultBigText.WithLetters(pterm.NewLettersFromString(m.appname)).Srender()
	pterm.DefaultCenter.Println(s) // Print BigLetters with the default CenterPrinter
}

func (m *CLIApp) disableStyling() {
	pterm.DisableColor()
	pterm.DisableStyling()
	pterm.Debug.Prefix.Text = ""
	pterm.Info.Prefix.Text = ""
	pterm.Success.Prefix.Text = ""
	pterm.Warning.Prefix.Text = ""
	pterm.Error.Prefix.Text = ""
	pterm.Fatal.Prefix.Text = ""
}

func (m *CLIApp) run() {

	if NO_COLOR {
		// shoutout to rob pike who thinks it's juvenile
		m.disableStyling()
	}

	m.printBanner()

	m.app = &cli.App{
		Name:                 m.appname,
		Usage:                "Manifest generator",
		Version:              m.version,
		EnableBashCompletion: true,
		Commands: []*cli.Command{
			{
				Name:    "generate",
				Aliases: []string{"gen"},
				Usage:   "Generate manifest file",
				Action: func(c *cli.Context) error {
					return m.generateManifestOperation(c)
				},
				Flags: []cli.Flag{
					&cli.StringFlag{
						Name:    "input",
						Value:   ".",
						Aliases: []string{"i"},
						Usage:   "Specify input directory.",
					},
					&cli.StringFlag{
						Name:    "output",
						Value:   "./index.mf",
						Aliases: []string{"o"},
						Usage:   "Specify output filename",
					},
				},
			},
			{
				Name:  "check",
				Usage: "Validate files using manifest file",
				Action: func(c *cli.Context) error {
					return m.validateManifestOperation(c)
				},
			},
		},
	}

	err := m.app.Run(os.Args)

	if err != nil {
		m.exitCode = 1
		log.Fatal(err)
	}
}

func (m *CLIApp) validateManifestOperation(c *cli.Context) error {
	log.Fatal("unimplemented")
	return nil
}

func (m *CLIApp) generateManifestOperation(c *cli.Context) error {
	fmt.Println("generateManifest()")
	fmt.Printf("called with arg: %s", c.String("input"))

	/*

		mgj, err := NewMFGenerationJobFromFilesystem(c.String("input"))
		if err != nil {
			log.Fatal(err)
			return err
		}
		mgj.scanForFiles()
		//mgj.outputFile = c.String("output")

	*/
	return nil
}