#!/bin/bash

set -e
set -v
set -o pipefail
set -o errtrace
set -o nounset
set -o errexit

KEYMAP='us'
LANG='en_US'
TIMEZONE='Canada/Eastern'
FONT=Lat2-Terminus16

BLOCKDEVICEDISK=/dev/sda
BLOCKDEVICEBOOT=/dev/sda1
BLOCKDEVICECRYPT=/dev/sda2

CRYPTDEVICE=archcrypt

VOLUMEGROUP=vg
LOGICALROOT=root
LOGICALROOTSIZE=40G
LOGICALSWAP=swap
LOGICALSWAPSIZE=4G
LOGICALHOME=home

MNT=/mnt

#PACKAGES='dialog wpa_supplicant openssh mesa xf86-video-amdgpu libva-mesa-driver vulkan-radeon intel-ucode xorg xterm xorg-xrandr'
PACKAGES='dialog wpa_supplicant openssh intel-ucode'

HOSTNAME=audrey-arch
DEFAULTUSER=audrey

(
    echo o
    echo Y
    echo n
    echo 1
    echo
    echo +512M
    echo ef00
    echo n
    echo 2
    echo
    echo
    echo 8e00
    echo w
    echo Y
) | sudo gdisk $BLOCKDEVICEDISK > /dev/null

mkfs.fat -F 32 $BLOCKDEVICEBOOT

cryptsetup -v -y -c aes-xts-plain64 -s 512 luksFormat $BLOCKDEVICECRYPT
cryptsetup luksOpen /dev/sda2 $CRYPTDEVICE

pvcreate /dev/mapper/$CRYPTDEVICE -f
vgcreate $VOLUMEGROUP /dev/mapper/$CRYPTDEVICE -f
lvcreate -L$LOGICALSWAPSIZE $VOLUMEGROUP -n $LOGICALSWAP
lvcreate -L$LOGICALROOTSIZE $VOLUMEGROUP -n $LOGICALROOT
lvcreate -l 100%FREE $VOLUMEGROUP -n $LOGICALHOME -q -y

mkfs.ext4 /dev/mapper/$VOLUMEGROUP-$LOGICALROOT
mkfs.ext4 /dev/mapper/$VOLUMEGROUP-$LOGICALHOME
mkswap /dev/mapper/$VOLUMEGROUP-$LOGICALSWAP
swapon /dev/mapper/$VOLUMEGROUP-$LOGICALSWAP

mount /dev/mapper/$VOLUMEGROUP-$LOGICALROOT $MNT
mkdir -p $MNT/{boot,home}
mount $BLOCKDEVICEBOOT $MNT/boot
mount /dev/mapper/$VOLUMEGROUP-$LOGICALHOME $MNT/home

pacstrap $MNT base base-devel $PACKAGES
genfstab -U $MNT >> /mnt/etc/fstab

arch-chroot $MNT ln -sf /usr/share/zoneinfo/$TIMEZONE /etc/localtime
arch-chroot $MNT hwclock --systohc

echo $LANG.UTF-8 UTF-8 > $MNT/etc/locale.gen
arch-chroot $MNT locale-gen

echo LANG=$LANG.UTF-8 >> $MNT/etc/locale.conf
echo KEYMAP=$KEYMAP > $MNT/etc/vconsole.conf
echo FONT=$FONT >> $MNT/etc/vconsole.conf

echo $HOSTNAME >> $MNT/etc/hostname
echo 127.0.0.1  $HOSTNAME.localdomain   $HOSTNAME >> $MNT/etc/hosts

arch-chroot $MNT useradd -m -G wheel -s /bin/bash $DEFAULTUSER
echo 'root ALL=(ALL) ALL' > $MNT/etc/sudoers
echo '%wheel ALL=(ALL) ALL' >> $MNT/etc/sudoers

MKINITCPIOCONF=$MNT/etc/mkinitcpio.conf
echo 'MODULES=()' > $MKINITCPIOCONF
echo 'BINARIES=()' >> $MKINITCPIOCONF
echo 'FILES=()' >> $MKINITCPIOCONF
echo 'HOOKS=(base udev autodetect modconf block keymap keyboard encrypt lvm2 filesystems fsck)' >> $MKINITCPIOCONF
echo 'COMPRESSION=lzma' >> $MKINITCPIOCONF

arch-chroot $MNT mkinitcpio -p linux

LOADERCONF=$MNT/boot/loader/loader.conf
arch-chroot $MNT bootctl --path=/boot install
echo 'default arch' > $LOADERCONF
echo 'timeout 3' >> $LOADERCONF
echo 'editor  1' >> $LOADERCONF
BOOTENTRY=$MNT/boot/loader/entries/arch.conf
echo 'title   Arch Linux' > $BOOTENTRY
echo 'linux   /vmlinuz-linux' >> $BOOTENTRY
echo 'initrd  /intel-ucode.img' >> $BOOTENTRY
echo 'initrd  /initramfs-linux.img' >> $BOOTENTRY
echo "options cryptdevice=UUID=$(blkid -s UUID -o value $BLOCKDEVICECRYPT):$CRYPTDEVICE root=/dev/mapper/$VOLUMEGROUP-$LOGICALROOT rw" >> $BOOTENTRY

arch-chroot $MNT systemctl enable dhcpcd.service
arch-chroot $MNT systemctl enable sshd.service

echo 'Installation almost complete. Setting passwords'
echo 'Choose a root password:'
arch-chroot $MNT passwd

nano /etc/pacman.conf

echo Choose a password for $DEFAULTUSER:
arch-chroot $MNT passwd $DEFAULTUSER

#umount -R $MNT
#clear
echo 'Installation finished, please reboot now.'