package cmd

import (
	"fmt"
	"io"
	"log"
	"os"
	"os/user"
	"strings"

	"github.com/spf13/cobra"
)

var (
	configDirectory string      = strings.Join([]string{getHomeDir(), ".muldap"}, "/")
	configFile      string      = "config.toml"
	configFilePath  string      = strings.Join([]string{configDirectory, configFile}, "/")
	defaultPerms    os.FileMode = 0700
)

var setupCmd = &cobra.Command{
	Use:   "setup",
	Short: "Set up your user environment for muldap",
	Long:  "An easy way to get your environment up and running using muldap",
	Run: func(cmd *cobra.Command, args []string) {
		// check if the configuration directory exists
		if _, err := os.Stat(configDirectory); os.IsNotExist(err) {
			fmt.Printf("Creating new configuration directory at %s\n", configDirectory)
			_ = os.Mkdir(configDirectory, defaultPerms)
		}

		// check if the configuration file exists
		if _, err := os.Stat(configFilePath); os.IsNotExist(err) {
			fmt.Printf("Creating new configuration file at %s\n", configFilePath)
			_, err = os.Create(configFilePath)
			if err != nil {
				log.Fatal(err)
			}

			// write the configuration to the new file
			copyFile("./config.toml", configFilePath)
		} else {
			// notify the user the file already exists
			fmt.Printf("Your configuration file already exists at %s\n", configFilePath)
		}
	},
}

// get user's home directory
func getHomeDir() string {
	usr, err := user.Current()
	if err != nil {
		log.Fatal(err)
	}

	return usr.HomeDir
}

// copy a file
func copyFile(src, dst string) {
	in, err := os.OpenFile(src, os.O_RDONLY, os.ModeAppend)
	if err != nil {
		log.Fatal(err)
	}
	defer in.Close()

	out, err := os.OpenFile(dst, os.O_WRONLY, os.ModeAppend)
	if err != nil {
		log.Fatal(err)
	}
	defer out.Close()

	_, err = io.Copy(out, in)
	if err != nil {
		log.Fatal(err)
	}
}