#!/bin/bash

set -o errexit -o nounset -o pipefail

. hosts.sh

[[ $# -eq 1 ]] || exit 1

readonly host=$1
readonly ip=${hosts_ipv4_address[$host]}
readonly hostname=${hosts_hostname[$host]}
readonly agcount=${hosts_agcount[$host]:-4}
readonly swap=${hosts_swap[$host]:-2048}
readonly remote=root@$ip

readonly drive=$(ssh $remote '[[ -e /dev/sda ]] && echo sda || echo vda')

# check for Arch ISO
ssh $remote '[[ $(grep IMAGE_ID /etc/os-release) = "IMAGE_ID=archlinux" ]]' || exit 5
ssh $remote '[[ $(grep IMAGE_VERSION /etc/os-release) = "IMAGE_VERSION=2024.11.01" ]]' || exit 5

ssh $remote "sfdisk /dev/$drive -w always <<< ';'"
ssh $remote "mkfs.xfs -d agcount=$agcount -f /dev/${drive}1"
rsync -cv pacman.d/mirrorlist $remote:/etc/pacman.d/mirrorlist
ssh $remote "mount /dev/${drive}1 /mnt"
ssh $remote "pacstrap -K /mnt $(tr '\n' ' ' < packages/$host)"

rsync -cv grub $remote:/mnt/etc/default/grub
ssh $remote "arch-chroot /mnt grub-install /dev/$drive"
ssh $remote "arch-chroot /mnt grub-mkconfig -o /boot/grub/grub.cfg"

ssh $remote "echo $hostname >/mnt/etc/hostname"

rsync -cpv --chmod=644 systemd/network/$host.link $remote:/mnt/etc/systemd/network/10-public.link
rsync -cpv --chmod=644 systemd/network/$host.network $remote:/mnt/etc/systemd/network/10-public.network

rsync -cpv --chmod=644 crypttab fstab locale.conf mkinitcpio.conf pacman.conf pacreport.conf resolv.conf $remote:/mnt/etc/

rsync -cv unbound.conf $remote:/mnt/etc/unbound/unbound.conf

if [[ $host = @(0.grapheneos.network|1.grapheneos.network|2.grapheneos.network|3.grapheneos.network) ]]; then
    cp chrony.conf chrony.conf.tmp
    echo -e '\nallow' >> chrony.conf.tmp
    rsync -cv chrony.conf.tmp $remote:/mnt/etc/chrony.conf
    rm chrony.conf.tmp
else
    rsync -cv chrony.conf $remote:/mnt/etc/chrony.conf
fi
ssh $remote mkdir -vp /mnt/etc/sysconfig
rsync -cpv --chmod 644 sysconfig/chronyd $remote:/mnt/etc/sysconfig/chronyd

rsync -cv authorized_keys $remote:/mnt/root/.ssh/authorized_keys
cp ssh/sshd_config ssh/sshd_config.tmp
sed -i "s/{{ssh_users}}/${hosts_ssh_users[$host]:-root}/g" ssh/sshd_config.tmp
rsync -cv ssh/sshd_config.tmp $remote:/mnt/etc/ssh/sshd_config
rm ssh/sshd_config.tmp

rsync -cv nftables/nftables-${hosts_firewall[$host]:-web}.conf $remote:/mnt/etc/nftables.conf

ssh $remote "arch-chroot /mnt systemctl enable chronyd.service fstrim.timer logrotate.timer nftables.service plocate-updatedb.timer systemd-networkd.service systemd-oomd.service sshd.service sysstat.service unbound.service"
ssh $remote "arch-chroot /mnt systemctl disable remote-fs.target systemd-network-generator.service"
ssh $remote "arch-chroot /mnt groupadd -g 2000 io_uring"

ssh $remote "umask 077 && dd if=/dev/random of=/mnt/swapfile bs=1M count=$swap status=progress"

ssh $remote "arch-chroot chsh -s /usr/bin/fish"

password=$(head -c32 <(tr -dc A-Za-z0-9 </dev/random))
echo password: $password
ssh $remote "echo root:$password | arch-chroot /mnt chpasswd"
ssh $remote umount /mnt
ssh $remote reboot