#!/usr/bin/env bash

trap clean EXIT

function clean() {
  rm -f "$pid_pipe" "$zenity_pipe" "$zenity_status_pipe" "$windows2usb_status_pipe"
  kill 0
}


log_file="/tmp/windows2usb.log"

pid_pipe="$(mktemp -u)"
zenity_pipe="$(mktemp -u)"
zenity_status_pipe="$(mktemp -u)"
windows2usb_status_pipe="$(mktemp -u)"

mkfifo "$pid_pipe"
mkfifo "$zenity_pipe"
mkfifo "$zenity_status_pipe"
mkfifo "$windows2usb_status_pipe"


devices_available="$(lsblk -dn -I 8 -o RM,NAME,SIZE,MODEL | awk '($1 == 1) { print "FALSE " substr($0, index($0, $2)) }')"

while [[ -z "$device" ]]
do
  device="$(zenity --list --radiolist \
    --title='Choose device' \
    --column='' --column='ID' --column='Size' --column='Name' \
    ${devices_available})"

  test $? -eq 1 && exit 1
done

while [[ -z "$image" ]]
do
  image="$(zenity --file-selection --title='Select image')"

  test $? -eq 1 && exit 1
done

while [[ -z "$mode" ]]
do
  mode="$(zenity --list --radiolist \
    --title='Select bootloader mode' \
    --column='' --column='ID' --column='Mode' --hide-column=2 \
    FALSE 'mbr'     'BIOS Boot' \
    TRUE  'gpt'     'UEFI Boot' \
    FALSE 'gptntfs' 'UEFI Boot with NTFS partition')"

  test $? -eq 1 && exit 1
done

echo "-------------------" >> "$log_file" 2>&1
echo "$(date '+%Y-%m-%d %H:%M:%S')" >> "$log_file" 2>&1
echo "-------------------" >> "$log_file" 2>&1


(
  zenity --progress --title='Writing' --pulsate --auto-close < <(tail -f "$zenity_pipe") &

  zenity_pid="$!"
  echo "$zenity_pid" > "$pid_pipe"

  wait "$zenity_pid"
  echo "$?" > "$zenity_status_pipe"
) &

read -st 3 zenity_pid <> "$pid_pipe"


(
  windows2usb "/dev/${device}" "$image" "$mode" >> "$log_file" 2>&1 &

  windows2usb_pid="$!"
  echo "$windows2usb_pid" > "$pid_pipe"

  wait "$windows2usb_pid"
  echo "$?" > "$windows2usb_status_pipe"
) &

read -st 3 windows2usb_pid <> "$pid_pipe"


while sleep 1
do
  if ! kill -0 "$zenity_pid" >/dev/null 2>&1 && [[ -p "$zenity_status_pipe" ]]
  then
    read -st 3 zenity_status <> "$zenity_status_pipe" || true
    rm -f "$zenity_status_pipe"
    
    if [[ -z "$zenity_status" ]] ||  [[ "$zenity_status" != 0 ]]
    then
      echo 'Cancel'
      kill "$windows2usb_pid"
      exit 1
    else
      exit 0
    fi
  fi

  if ! kill -0 "$windows2usb_pid" >/dev/null 2>&1 && [[ -p "$windows2usb_status_pipe" ]]
  then
    read -st 3 windows2usb_status <> "$windows2usb_status_pipe" || true
    rm -f "$windows2usb_status_pipe"

    echo '100' > "$zenity_pipe"

    if [[ -z "$windows2usb_status" ]] || [[ "$windows2usb_status" != 0 ]]
    then
      zenity --error --text="Error occured, see log at ${log_file}"
      exit 1
    else
      zenity --info --text="Image has been successfully written!"
      exit 0
    fi
  fi
done