#!/bin/bash
set -e

source funcs.sh

#
# stage3 install
#

# sync time
ntpd -q -g || true

# download & unpack stage3 tarball
links https://www.gentoo.org/downloads/mirrors/
LINKS_RUNNING="true"
while [[ $LINKS_RUNNING == "true" ]]; do
  log_msg INFO "Waiting for user to quit links ..."
  LINKS_RUNNING=$(ps -aux | (grep -o '[l]inks') || true)
  sleep 5s
done
tar xpvf stage3-*.tar.xz --xattrs-include="*.*" --numeric-owner
rm stage3-*.tar.xz

# set USE flags for later
rm -rf /mnt/gentoo/etc/package.use
touch /mnt/gentoo/etc/package.use
cat package.use > /mnt/gentoo/etc/package.use

# configure portage (COMMON/USE)
cat make.conf > /mnt/gentoo/etc/make.conf

# make sure DNS works after chroot
cp --dereference /etc/resolv.conf /mnt/gentoo/etc/

# mount filesystems
mount --types proc /proc /mnt/gentoo/proc
mount --rbind /sys /mnt/gentoo/sys
mount --make-rslave /mnt/gentoo/sys
mount --rbind /dev /mnt/gentoo/dev
mount --make-rslave /mnt/gentoo/dev
mount --bind /run /mnt/gentoo/run
mount --make-slave /mnt/gentoo/run

# change root!
chroot /mnt/gentoo /bin/bash << EOF
set -e

source funcs.sh
source /etc/profile
export PS1="(chroot) ${PS1}"

  log_msg INFO "mount boot partition (EFI)" >> /var/log/installer.log
  mkdir -p /boot/efi
  mount ${CFG_BLOCK_PART}1 /boot/efi

log_msg INFO "synchronize gentoo ebuild repo" >> /var/log/installer.log
emerge --ask n --sync

# set some makeopts and default opts
# WARNING: THE DEFAULT USES ALL THE THREADS IN THE SYSTEM!
# IF YOU DO NOT WANT THIS PLEASE CHANGE IT TO WHAT GENTOO RECOMMENDS
# https://wiki.gentoo.org/wiki/Handbook:AMD64/Installation/Stage#MAKEOPTS
emerge --ask n cpuid2cpuflags
cpuid2cpuflags | sed 's/:\s/="/; s/$/"/' >> /etc/portage/make.conf
echo "EMERGE_DEFAULT_OPTS=\"--jobs=$(nproc) --load-average=$(nproc) --keep-going --verbose --quiet-build --with-bdeps=y --complete-graph=y --deep --ask\"" >> /etc/portage/make.conf 
echo "MAKEOPTS=\"-j$(nproc) -l$(nproc)\"" >> /etc/portage/make.conf

# install custom compiler for firefox
mkdir -p /etc/portage/env
curl -L https://gist.githubusercontent.com/emrakyz/23bf6fe9c30aa0b1eb88021889750ace/raw/832a0160ac0d0383c4f600da5cf8af4290019ff6/compiler-firefox -o /etc/portage/env/compiler-firefox
echo "www-client/firefox compiler-firefox" > /etc/portage/package.env

# TODO: select profile

log_msg INFO "update @world set (@system and @selected)" >> /var/log/installer.log
emerge --ask n --update --deep --newuse @world
emerge --ask n @preserved-rebuild
emerge --ask n --depclean

log_msg INFO "configure licenses" >> /var/log/installer.log
echo "ACCEPT_LICENSE=\"*\"" >> /etc/portage/make.conf

log_msg INFO "configure timezone (glibc)" >> /var/log/installer.log
echo ${CFG_TIMEZONE} > /etc/timezone
emerge --ask n --config sys-libs/timezone-data

log_msg INFO "configure locales (glibc)" >> /var/log/installer.log
echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen
locale-gen


log_msg INFO "reload environment" >> /var/log/installer.log
env-update && source /etc/profile && export PS1="(chroot) ${PS1}"

#
# firmware install
#

log_msg INFO "installing microcode and firmware" >> /var/log/installer.log
emerge --ask n intel-microcode
SIGNATURE=$(iucode_tool -S 2>&1 | grep -o "0.*$")
sed -i "s/MICROCODE_SIGNATURES=\"-S\"/MICROCODE_SIGNATURES=\"-s $SIGNATURE\"/" /etc/portage/make.conf
emerge --ask n intel-microcode
USE="-compress-xz" emerge --ask n linux-firmware
emerge --oneshot --ask n pciutils
GPU_CODE=$(lspci | grep -i 'vga\|3d\|2d' | awk -F'[[]' '{print $1}' | awk '{print $NF}' | tr '[:upper:]' '[:lower:]')
sed -i "/^nvidia\/\($GPU_CODE\)/!d" /etc/portage/savedconfig/sys-kernel/linux-firmware-*

# fix depen problems with freetype and harfbuzz
USE="-harfbuzz" emerge --oneshot --ask n freetype
emerge --oneshot --ask n freetype

#
# kernel install
#

log_msg INFO "install kernel sources" >> /var/log/installer.log
emerge --ask n sys-kernel/gentoo-sources
# testing if cd works, if curl screws up this is probably the main issue
cd /usr/src/linux
curl -L https://gist.githubusercontent.com/emrakyz/0ff8674792bd844fcab6afb2063ffa94/raw/e91e60ae2f74ccee8fcd7b7b93db942ba60277ce/.config -o .config
PARTUUID_ROOT=PARTUUID_ROOT=$(blkid -s PARTUUID -o value ${CFG_BLOCK_PART}3)
sed -i -e '/^CONFIG_CMDLINE="root=PARTUUID=.*/c\' -e "CONFIG_CMDLINE=\"root=PARTUUID=$PARTUUID_ROOT\"" /usr/src/linux/.config
MICROCODE_PATH=$(iucode_tool -S -l /lib/firmware/intel-ucode/* 2>&1 | grep 'microcode bundle' | awk -F': ' '{print $2}' | cut -d'/' -f4-)
sed -i "s#CONFIG_EXTRA_FIRMWARE=.*#CONFIG_EXTRA_FIRMWARE=\"$MICROCODE_PATH\"#g" /usr/src/linux/.config
THREAD_NUM=$(nproc)
sed -i "s#CONFIG_NR_CPUS=.*#CONFIG_NR_CPUS=$THREAD_NUM#g" /usr/src/linux/.config
make menuconfig
MAKEMENUCONFIG_RUNNING="true"
while [[ $MAKEMENUCONFIG_RUNNING == "true" ]]; do
  log_msg INFO "Waiting for user to end modifying kernel ..."
  MAKEMENUCONFIG_RUNNING=$(ps -aux | (grep -o '[m]ake') || true)
  sleep 5s
done
make -j$(nproc)
emerge nvidia-drivers linux-firmware
make modules_install

#
# filesystem install
#

#needed so motherboard can detect it
mkdir -p /boot/EFI/BOOT
cp /usr/src/linux/arch/x86/boot/bzImage /boot/EFI/BOOT/BOOTX64.EFI

log_msg INFO "set swap, / and cdrom in fstab" >> /var/log/installer.log
mkdir -p /mnt/cdrom
UUID_BOOT=$(blkid -s UUID -o value ${CFG_BLOCK_PART}1)
UUID_ROOT=$(blkid -s UUID -o value ${CFG_BLOCK_PART}3)
UUID_HOME=$(blkid -s UUID -o value ${CFG_BLOCK_PART}4)
echo "UUID=$UUID_BOOT /boot vfat defaults,noatime 0 2
echo "${CFG_BLOCK_PART}"2 none swap sw 0 0 >> /etc/fstab
echo "${CFG_BLOCK_PART}"3 / ext4 defaults,noatime 0 1 >> /etc/fstab
echo "${CFG_BLOCK_PART}"4 /home ext4 defaults,noatime 0 1" >> /etc/fstab
echo /dev/cdrom /mnt/cdrom auto noauto,user 0 0 >> /etc/fstab

#
# networking install
#

log_msg INFO "set hostname" >> /var/log/installer.log
echo "hostname=\"${CFG_HOSTNAME}\"" > /etc/conf.d/hostname

log_msg INFO "install networkmanager" >> /var/log/installer.log
emerge --ask n --noreplace net-misc/networkmanager

log_msg INFO "install dhcpcd" >> /var/log/installer.log
emerge --ask n net-misc/dhcpcd

log_msg INFO "install wireless" >> /var/log/installer.log
emerge --ask n net-wireless/iw net-wireless/wpa_supplicant

log_msg INFO "configure networking" >> /var/log/installer.log

# placeholder /etc/hosts file, replace later
curl https://git.keyemail.dev/lurk/really-bad-gentoo-install/raw/branch/master/README.md >> /etc/hosts

log_msg INFO "configure hosts" >> /var/log/installer.log
echo "127.0.0.1 ${CFG_HOSTNAME} localhost" >> /etc/hosts

#
# system install
#

log_msg INFO "set root password" >> /var/log/installer.log
echo "root:${CFG_ROOT_PASSWORD}" | chpasswd

log_msg INFO "set keymap" >> /var/log/installer.log
sed -i '/^keymap/s/=.*$/=$"'"fi"'"/' /etc/conf.d/keymaps
rc-update add keymaps boot
rc-service keymaps restart

log_msg INFO "install syslog" >> /var/log/installer.log
emerge --ask n app-admin/sysklogd
rc-update add sysklogd default

log_msg INFO "install crond" >> /var/log/installer.log
emerge --ask n sys-process/cronie
rc-update add cronie default

log_msg INFO "install file indexer" >> /var/log/installer.log
emerge --ask n sys-apps/mlocate

log_msg INFO "install filesystem tools" >> /var/log/installer.log
emerge --ask n sys-fs/e2fsprogs
emerge --ask n sys-fs/dosfstools

log_msg INFO "set clock" >> /var/log/installer.log
sed -i 's/clock=.*/clock=\"local\"/g' /etc/conf.d/hwclock

log_msg INFO "install doas (sudo replacement)" >> /var/log/installer.log
emerge --ask n doas

echo "permit :wheel
permit nopass keepenv :$CFG_USER_USERNAME
permit nopass keepenv :root" > /etc/doas.conf

log_msg INFO "install git" >> /var/log/installer.log
emerge --ask n app-eselect/eselect-repository dev-vcs/git

log_msg INFO "set up git ver of gentoo repo" >> /var/log/installer.log
eselect repository remove gentoo
rm -rf /var/db/repos/gentoo
eselect repository add gentoo git https://github.com/gentoo-mirror/gentoo.git

log_msg INFO "install pipewire" >> /var/log/installer.log
emerge --ask n pipewire
emerge --ask n wireplumber

log_msg INFO "install efibootmgr" >> /var/log/installer.log
emerge --ask n efibootmgr

# create user
useradd -mG wheel,audio,video,usb,input,portage,pipewire $CFG_USER_USERNAME
echo "$CFG_USER_USERNAME:$CFG_USER_PASSWORD" | chpasswd

# nvidia modules
mkdir -p /etc/modules-load.d
echo "nvidia
nvidia_modeset
nvidia_uvm
nvidia_drm" > /etc/modules-load.d/video.conf
echo "nvidia-drm
options nvidia-drm modeset=1" > /etc/modules-load.d/nvidia-drm.conf

# clean up portage
rm -rf /var/tmp/portage/*
rm -rf /var/cache/distfiles/*
rm -rf /var/cache/binpkgs/*

#
# bootloader install should be done manually
#

EOF