package commands

import (
	"io"
	"os"

	"git.cheetah.cat/cheetah/moto-flash-data/motolol/cpe"
)

type DecryptDBFCommand struct {
	SourceFileName string `long:"src" alias:"i" required:"true" description:"input-filename"`
	DestFileName   string `long:"dest" alias:"o" required:"true" description:"output-filename"`
}

func (command *DecryptDBFCommand) Execute(args []string) error {
	inputFile, err := os.Open(command.SourceFileName)
	if err != nil {
		return err
	}
	defer inputFile.Close()
	outputFile, err := os.Create(command.DestFileName)
	if err != nil {
		return err
	}
	defer outputFile.Close()

	inputFileStat, err := inputFile.Stat()
	if err != nil {
		return err
	}

	pdata := make([]byte, inputFileStat.Size())
	_, err = io.ReadFull(inputFile, pdata)
	if err != nil {
		return err
	}

	decrypted := cpe.DecryptDBFFile(pdata)

	_, err = outputFile.Write(decrypted)
	if err != nil {
		return err
	}

	return nil
}