#!/bin/bash

source install.conf

# make command silent
s() {
	$* >/dev/null 2>&1
}

# check for internet
s ping -c1 archlinux.org
if [[ "$?" -ne 0 ]]; then
	echo "internet connection needed"
	exit 1
fi

# determine efi or bios boot mode
if [[ ! "$boot_mode" ]]; then
	s ls /sys/firmware/efi/efivars
	if [[ "$?" -eq 0 ]]; then
		echo "selected efi boot mode"
		boot_mode='efi'
	else
		echo "selected bios boot mode"
		boot_mode='bios'
	fi
fi

echo "update system clock"
s timedatectl set-ntp true

echo "create partitions"
s wipefs -af "$storage_device"
if [[ "$boot_mode" == "efi" ]]; then
	sgdisk -n "1:2048:+1G" -t "1:EF00" "$storage_device"
else
	sgdisk -n "1:2048:+1G" -t "1:EF02" "$storage_device"
fi
sgdisk -n "2:0:0" -t "2:8309" "$storage_device"

echo "creating luks partition"
echo "$encryption_password" | cryptsetup -q luksFormat --type luks1 "${storage_device}2"
echo "$encryption_password" | cryptsetup -q open "${storage_device}2" lvm

echo "creating lvm"
s pvcreate /dev/mapper/lvm
s vgcreate vg /dev/mapper/lvm
s lvcreate -L 8G vg -n swap
s lvcreate -l 100%FREE vg -n root

echo "formatting filesystems"
if [[ "$boot_mode" == "efi" ]]; then
	s mkfs.vfat -F32 "${storage_device}1"
else
	s mkfs.vfat "${storage_device}1"
fi
s mkfs.ext4 /dev/vg/root
s mkswap /dev/cg/swap

echo "mounting filesystems"
s mount /dev/vg/root /mnt
if [[ "$boot_mode" == "efi" ]]; then
	s mkdir /mnt/efi
	s mount "${storage_device}1" /mnt/efi
else
	s mkdir /mnt/boot
	s mount "${storage_device}1" /mnt/boot
fi

echo "installing base system"
pacstrap /mnt base

echo "generating fstab"
s genfstab -U /mnt >> /mnt/etc/fstab