#!/usr/bin/env bash

set -eux -o pipefail

BASE="$(dirname "$(readlink -f "$0")")"
. "${BASE}/helpers.sh"

export HOST=serverle
export DRIVE_ROOT=/dev/disk/by-id/usb-Seagate_Expansion_2HC015KJ-0\:0

export NIXOS_FILES="${NIXOS_FILES:-$PWD}"
export CHROOT_BASE="/mnt/newroot-${HOST}"

export DRIVE_ROOT_LUKS=/dev/mapper/luks-root
PARTSEP="-part"

ask_if_sure

mp_umount /

################################################################################################
echo "Starting Root SSD"

lvm_remove_lv /dev/vg_root/lv_root
lvm_remove_lv /dev/vg_root/lv_srv
lvm_remove_vg vg_root
lvm_remove_pv "${DRIVE_ROOT_LUKS}"

luks_close "$(basename "${DRIVE_ROOT_LUKS}")"
#zero_blockdev "${DRIVE_ROOT}" # trim support is not available on external drives

parttable_clear "${DRIVE_ROOT}"

# ROOT SSD SETUP
sgdisk \
	-o "${DRIVE_ROOT}" \
	-n 1:2048:4095   -c 1:"BIOS Boot Partition"  -t 1:ef02 \
	-n 2:4096:823295 -c 2:"EFI System Partition" -t 2:ef00 \
	--largest-new=3  -c 3:"Crypt"                -t 3:8309 \
	-p

sleep 3

cryptsetup luksFormat "${DRIVE_ROOT}${PARTSEP}3"
cryptsetup luksOpen --allow-discards "${DRIVE_ROOT}${PARTSEP}3" "$(basename "${DRIVE_ROOT_LUKS}")"

pvcreate         "${DRIVE_ROOT_LUKS}"
vgcreate vg_root "${DRIVE_ROOT_LUKS}"

lvcreate -L 50GiB -n lv_root vg_root
mkfs.ext4 -L "${HOST}-root" /dev/vg_root/lv_root

lvcreate -L 100GiB -n lv_srv vg_root
mkfs.ext4 -L "${HOST}-srv" /dev/vg_root/lv_srv

lvcreate -L 4GiB -n lv_swap vg_root
mkswap -L "${HOST}-swap" /dev/vg_root/lv_swap

zero_overwrite "${DRIVE_ROOT}${PARTSEP}2"
mkfs.vfat -n "${HOST}-boot" "${DRIVE_ROOT}${PARTSEP}2"

mp_mount /dev/vg_root/lv_root /
mp_mount /dev/vg_root/lv_srv /srv
mp_mount "${DRIVE_ROOT}${PARTSEP}2" /boot

mkdir -p /etc/secrets/initrd
ssh-keygen -t ed25519 -N "" -f "/etc/secrets/initrd/ssh_host_ed25519_key"

mkdir -p "${CHROOT_BASE}/etc/nixos/"
rsync -avH "${NIXOS_FILES}/" "${CHROOT_BASE}/etc/nixos/"

mkdir -p "${CHROOT_BASE}/etc/secrets/initrd"
rsync -avH "/etc/secrets/" "${CHROOT_BASE}/etc/secrets/"

install_os "${CHROOT_BASE}"