package cmd

import (
	"apkovl-cli/compression"
	"embed"
	"io"
	"os"

	log "github.com/s00500/env_logger"
)

//go:embed templates/*
var embeddedFS embed.FS

func prepareWorkdir() {
	log.Info("Extracting APKovl ", apkovlFile, " to: ", workdir)
	// Extract apkovl
	err := os.RemoveAll(workdir)
	log.MustFatal(err)
	err = os.MkdirAll(workdir, 0755)
	log.MustFatal(err)
	r, err := os.Open(apkovlFile)
	log.MustFatal(err)
	err = compression.ExtractTarGz(r, workdir)
	log.MustFatal(err)
}

func createOutput() {
	log.Info("Compress Workdir (", workdir, "), outputting: ", apkovlFileOutput)
	//Compress APKovl
	err := compression.Compress(workdir, apkovlFileOutput)
	log.MustFatal(err)
}

func copyEmbeddedFile(src, dst string) error {
	srcfd, err := embeddedFS.Open(src)
	if err != nil {
		return err
	}

	defer srcfd.Close()

	dstfd, err := os.Create(dst)
	if err != nil {
		return err
	}
	defer dstfd.Close()

	if _, err = io.Copy(dstfd, srcfd); err != nil {
		return err
	}

	return nil // Do not change permissions
}

// copyFile copies a single file from src to dst
func copyFile(src, dst string) error {
	var err error
	var srcfd *os.File
	var dstfd *os.File
	var srcinfo os.FileInfo

	if srcfd, err = os.Open(src); err != nil {
		return err
	}
	defer srcfd.Close()

	if dstfd, err = os.Create(dst); err != nil {
		return err
	}
	defer dstfd.Close()

	if _, err = io.Copy(dstfd, srcfd); err != nil {
		return err
	}
	if srcinfo, err = os.Stat(src); err != nil {
		return err
	}
	return os.Chmod(dst, srcinfo.Mode())
}