package Package

import (
	"errors"
	"fmt"
	"io/ioutil"
	"os"
	"path/filepath"
	"strconv"
	"strings"

	"PackageManager/Archive"
	"PackageManager/Client/Filesystem"
	"PackageManager/Color"
	"PackageManager/Helper"
)

func CreatePackage() error {
	var (
		dirtyFiles     map[int]string
		newFiles       map[int]string
		pkgFiles       map[int]string = make(map[int]string)
		choices        string
		choicesSplit   []string
		filePath       string
		pkgName        string
		pkgVersion     string
		pkgNameVersion string
		tmpDir         string
		index          int
		ok             bool
		e              error
	)

	fmt.Println("Initialising package creation...")

	dirtyFiles, newFiles, e = Filesystem.GetFilesystemDiff()
	if e != nil {
		return e
	}

	fmt.Println("\nModified files...")
	for i, file := range dirtyFiles {
		fmt.Printf(
			"\t%d - %s\n",
			i,
			Color.Red(file),
		)
	}

	fmt.Println("\nNew files...")
	for i, file := range newFiles {
		fmt.Printf(
			"\t%d - %s\n",
			i,
			Color.Red(file),
		)
	}

	fmt.Println("Please select the files you would like to use to create the package. Leave empty for all.")
	choices = Helper.Input()

	if choices == "" {
		for i, file := range dirtyFiles {
			pkgFiles[i] = file
		}
		for i, file := range newFiles {
			pkgFiles[i] = file
		}
	} else {

		choicesSplit = strings.Split(choices, ",")

		for _, i := range choicesSplit {
			index, e = strconv.Atoi(i)
			if e != nil {
				// TODO: Handle this error
				panic(e)
			}
			filePath, ok = dirtyFiles[index]
			if !ok {
				filePath, ok = newFiles[index]
				if !ok {
					return errors.New("Invalid package selection")
				}
			}
			pkgFiles[index] = filePath
		}
	}

	fmt.Println("Please enter the package name:")
	pkgName = Helper.Input()
	if pkgName == "" {
		return errors.New("Invalid package name")
	}

	fmt.Println("Please enter the package version:")
	pkgVersion = Helper.Input()
	if pkgVersion == "" {
		return errors.New("Invalid package name")
	}

	fmt.Printf("Package Name: %s\n", pkgName)
	fmt.Printf("Package Version: %s\n", pkgVersion)

	fmt.Println("Files to be added")
	for i, file := range pkgFiles {
		fmt.Printf(
			"\t%d - %s\n",
			i,
			Color.Green(file),
		)
	}

	fmt.Println("Is this correct? [y/N]")
	if strings.ToLower(Helper.Input()) != "y" {
		return errors.New("User aborted")
	}

	pkgNameVersion = fmt.Sprintf("%s-%s", pkgName, pkgVersion)

	tmpDir, e = ioutil.TempDir("/tmp", pkgNameVersion)
	if e != nil {
		return e
	}
	defer os.RemoveAll(tmpDir)

	for _, file := range pkgFiles {
		Filesystem.CopyFile(file, filepath.Join(tmpDir, file))
	}

	// TODO: Add dependancy management here

	e = Archive.TarGzip(tmpDir, pkgNameVersion+".tar.gz")
	if e != nil {
		return e
	}

	fmt.Printf(
		Color.Green("\nSuccessfully created package %s\n"),
		pkgNameVersion,
	)

	return nil
}