#!/bin/ash

failed(){
   echo "Error: Command $1 failed."
   exit 1
}


debian_install(){
  mkdir -p /tmp/newroot
  mount -t ext4 ${1} /tmp/newroot
  debootstrap --arch=mipsel --include=vim,openssh-server,ntpdate,cron,locales,udev,ca-certificates,apt-transport-https,vlan jessie /tmp/newroot http://httpredir.debian.org/debian || failed debootstrap
}

debian_fix(){

cat << EOF > /tmp/newroot/etc/network/interfaces
auto lo
iface lo inet loopback

auto eth0.1
iface eth0.1 inet static
    address 192.168.1.1
    netmask 255.255.255.0

auto eth0.2
iface eth0.2 inet dhcp

EOF

  mkdir /tmp/newroot/rom
  mknod /tmp/newroot/dev/console c 5 1
  mknod /tmp/newroot/dev/ttyS0 c 4 64
  mknod /tmp/newroot/dev/tty0 c 4 0
  mknod /tmp/newroot/dev/tty1 c 4 1

  sed -i "s/^root:\*:/root:\$6\$l80E2NNrh32z0N\$HX1nhaV6TcdM3OcMm8PVyzQZAl6c9Q2GYugdS9MuDcG6NkxW3eLCvLbw05tMKkbyRlieU1QeZ4tngZpaS9Fnf0:/" /tmp/newroot/etc/shadow
  mkdir -p /tmp/newroot/etc/cron.d
  echo "10 */4 * * * root /usr/sbin/ntpdate -u pool.ntp.org " > /tmp/newroot/etc/cron.d/ntp
  sed -i "s/^exit 0/ntpdate -u pool.ntp.org\nexit 0/g" /tmp/newroot/etc/rc.local
  echo "gnubee-pc1.gnubee" > /tmp/newroot/etc/hostname
  echo "LABEL=GNUBEE-ROOT /  ext4  noatime,errors=remount-ro 0  1" >> /tmp/newroot/etc/fstab
  sed -i "s/^127.0.0.1.*/& gnubee-pc1 gnubee-pc1.gnubee/" /tmp/newroot/etc/hosts
  sed -i "s/^PermitRootLogin.*/PermitRootLogin yes/" /tmp/newroot/etc/ssh/sshd_config
  sync

}


format_partition(){
   echo -n "Partition will be formatted, please type CONFIRM if you agree: "
   read IN
   if [[ $IN == "CONFIRM" ]]
   then
      umount ${1}
      echo "Formatting ${1}, please wait..."
      echo y | mkfs.ext4 -m 2 -L GNUBEE-ROOT ${1}
      debian_install ${1}
      debian_fix
      echo "Debian successfully installed into ${1}, please reboot your device now."
   else
      echo "Operation cancelled."
   fi
}

error_partition(){
   echo "Partition not found, operation cancelled."
}

choose_partition(){
  echo "Detecting connected partitions, please wait a few moments."
  OPTIONS=`blkid | grep "/dev/sd\|/dev/md0"`
  echo "$OPTIONS"
  echo -n "Choose partition to install (will be formatted !!!): ";
  read STR
  echo
  echo "$OPTIONS" | grep "^${STR}:" && format_partition ${STR} || error_partition
}

choose_partition