#!/bin/bash

TARGET=$1
DEBIAN_CODENAME=$2
LANG=C
VERSION="$(date +%g.%m)"

APT_PARAM=''
STDOUT='/dev/stdout'
if [ !$MKRESCUE_VERBOSE ]; then
        APT_PARAM='-qq -o=Dpkg::Use-Pty=0';
        STDOUT='/dev/null'
fi

SOFTWARE="acl acpi-support-base attr \
  bash-completion bind9-host binutils bridge-utils bsdmainutils \
  ca-certificates \
  debootstrap dialog dosfstools dmidecode \
  efibootmgr ethtool \
  fdisk file \
  gddrescue gdisk grub-pc grub-efi-amd64-bin \
  hdparm \
  ifenslave iproute2 iputils-ping ipxe \
  less lsof lvm2 lzip \
  mdadm mtr-tiny mtools \
  nano netcat-traditional net-tools nfs-common ntfs-3g nvme-cli \
  parted pciutils pixz procps psmisc pv \
  rsync \
  screen scrub smartmontools ssh strace sysstat systemd systemd-resolved systemd-sysv \
  tar tcpdump telnet traceroute tree \
  usbutils \
  vim vlan \
  wget \
  xz-utils xfsprogs \
  zfsutils-linux zstd"

chroot ${TARGET} apt-get $APT_PARAM --yes install ${SOFTWARE} > $STDOUT
chroot ${TARGET} systemctl enable systemd-networkd.service
chroot ${TARGET} systemctl enable systemd-resolved.service
chroot ${TARGET} systemctl enable acpid.service

echo "Etc/UTC" > ${TARGET}/etc/timezone
chroot ${TARGET} dpkg-reconfigure -f noninteractive tzdata

cat << EOF > ${TARGET}/etc/motd

WARNING: Authorized access only!

EOF

cat << EOF > ${TARGET}/etc/issue
WMI Rescue Linux (based on Debian GNU/Linux ${DEBIAN_CODENAME^})
Version ${VERSION} AMD64

EOF

#disable console blanking
#(consoleblank=0 as kernel param or setterm -blank 0)
#current value can be checked in /sys/module/kernel/parameters/consoleblank
echo -ne "\033[9;0]" >> ${TARGET}/etc/issue

sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/g' ${TARGET}/etc/ssh/sshd_config
cat << EOF > ${TARGET}/etc/systemd/network/all.network
[Match]
Name=*

[Network]
DHCP=yes
EOF
cat << EOF > ${TARGET}/etc/systemd/resolved.conf
[Resolve]
FallbackDNS=8.8.8.8 8.8.4.4 2001:4860:4860::8888 2001:4860:4860::8844
EOF

rm ${TARGET}/etc/resolv.conf
ln -s /run/systemd/resolve/resolv.conf ${TARGET}/etc/resolv.conf
rm ${TARGET}/etc/systemd/system/network-online.target.wants/systemd-networkd-wait-online.service
#use old network device names
ln -s /dev/null ${TARGET}/etc/systemd/network/99-default.link

cat << EOF > ${TARGET}/etc/systemd/system/ssh-session-cleanup.service
[Unit]
Description=OpenBSD Secure Shell session cleanup
Wants=network.target
After=network.target

[Service]
ExecStart=/bin/true
ExecStop=/usr/lib/openssh/ssh-session-cleanup
RemainAfterExit=yes
Type=oneshot

[Install]
WantedBy=multi-user.target
EOF

chroot ${TARGET} systemctl enable ssh-session-cleanup.service

cat << EOF > ${TARGET}/etc/screenrc
startup_message off
defscrollback 5000
EOF

cat << EOF > ${TARGET}/etc/sysctl.d/60-panic.conf
kernel.panic = 5
kernel.panic_on_oops = 1
EOF

# VIM
sed -i 's/" let g:skip_defaults_vim = 1/let g:skip_defaults_vim = 1/g' ${TARGET}/etc/vim/vimrc

cat << EOF > ${TARGET}/etc/vim/vimrc.local
syntax enable
set background=dark

" spaces & tabs
set tabstop=4           " number of visual spaces per TAB
set softtabstop=4       " number of spaces in tab when editing
set expandtab           " tabs are spaces
set shiftwidth=4        " indent shift
set autoindent

" UI config
set number              " show line numbers
set showcmd             " show command in bottom bar
filetype indent on      " load filetype-specific indent files
set wildmenu            " visual autocomplete for command menu
set lazyredraw          " redraw only when we need to
set showmatch           " highlight matching [{()}]
set laststatus=2        " always display status line
set ruler               " show the line and column number
set showmode            " show current mode
set mousemodel=extend
set history=100
set pastetoggle=<F12>

" searching
set incsearch           " search as characters are entered
set hlsearch            " highlight matches

" folding
set foldenable          " enable folding
set foldlevelstart=10   " open most folds by default
set foldnestmax=10      " 10 nested fold max
nnoremap <space> za
set foldmethod=indent

" movement
set backspace=indent,eol,start

" language-specific settings
autocmd FileType mail,news set textwidth=74 formatoptions=tln21cq
autocmd FileType text setlocal textwidth=78
autocmd FileType make set noexpandtab tabstop=8
let bash_is_sh = 1
let c_gnu=1
let c_comment_strings=1
let java_highlight_java_lang_ids=1
let python_highlight_all = 1
EOF

rsync -avS ${TARGET}/etc/skel/ ${TARGET}/root/


echo zfs >> ${TARGET}/etc/modules

mkdir ${TARGET}/etc/bash_completion.d
cp ${TARGET}/usr/share/bash-completion/completions/zfs ${TARGET}/etc/bash_completion.d/