#!/usr/bin/env bash

### https://wiki.archlinux.org/title/Archiso

set -eou pipefail
set -x

# Test if archiso is installed
if ! pacman -Qs archiso > /dev/null; then
    echo "Error: archiso is not installed."

    read -p "Do youwant to install archiso? [Y]es or [N]o. \n" -n 1 -r
        if [[ $REPLY =~ ^[Yy]$ ]]; then
            sudo pacman -Sy archiso
        else
            echo "Exiting."
            exit 0
        fi
fi

# Write log
logdir="/home/$USER/.archiso/logs"
mkdir -p "${logdir}"
logfile="${logdir}/$(date +%Y-%m-%d_%H:%M).log"
exec >> >(tee -i "${logfile}")
exec 2>&1

# Ask password for ISO user
pw_hash=$(openssl passwd -6)

# Profile to use
profile="releng"
#profile="baseline"

# releng is used to create the official monthly installation ISO.
# It can be used as a starting point for creating a customized ISO image.

# baseline is a minimal configuration, that includes only the bare minimum
# packages required to boot the live environment from the medium.

# Define directories
dir="/home/$USER/.archiso"
prof_dir="${dir}/${profile}"
pkgs_file="${prof_dir}/packages.x86_64"
#workdir="${dir}/.tmp"
workdir="/tmp/archiso"
root_etc="${prof_dir}/airootfs/etc"

# Delete old profile
sudo rm -rf ${prof_dir}
sudo rm -rf ${dir}/output/*
sudo rm -rf ${dir}/.tmp/*

# Copy new profile template
# https://wiki.archlinux.org/title/Archiso#Prepare_a_custom_profile
cp -r "/usr/share/archiso/configs/${profile}" "${dir}"

# Define packages to install
# https://wiki.archlinux.org/title/Archiso#Selecting_packages
touch "${pkgs_file}"

declare -a pkgs=(
    firefox
    konsole
    plasma-desktop
    sddm
    sddm-kcm
)

for pkg in "${pkgs[@]}"; do
    echo "${pkg}" >> "${pkgs_file}"
done

# Activate sddm.service
# https://wiki.archlinux.org/title/Archiso#Login_manager
ln -s /usr/lib/systemd/system/sddm.service \
    "${root_etc}/systemd/system/display-manager.service"

# Autologin config
# https://wiki.archlinux.org/title/Archiso#Changing_automatic_login
mkdir "${root_etc}/sddm.conf.d"
cat << EOF > "${root_etc}/sddm.conf.d/autologin.conf"
[Autologin]
Relogin=false
Session=plasmax11
User=$USER

[Theme]
Current=breeze
CursorTheme=Breeze_Light
EOF

# Create user
# https://wiki.archlinux.org/title/Archiso#Users_and_passwords
root_etc="${prof_dir}/airootfs/etc"

echo root:x:0:0:root:/root:/usr/bin/zsh > "${root_etc}/passwd"
echo "${USER}":x:1000:1000::/home/"${USER}":/usr/bin/zsh >> "${root_etc}/passwd"

echo "${USER}:${pw_hash}:14871::::::" >> "${root_etc}/shadow"

echo root:x:0:root > "${root_etc}/group"
echo adm:x:4:"${USER}" >> "${root_etc}/group"
echo wheel:x:10:"${USER}" >> "${root_etc}/group"
echo uucp:x:14:"${USER}" >> "${root_etc}/group"
echo "${USER}":x:1000: >> "${root_etc}/group"

echo root:!*::root > "${root_etc}/gshadow"
echo "${USER}":!*:: >> "${root_etc}/gshadow"

sed -i '27s/.*/  ["\/etc\/gshadow"]="0:0:0400"/' "$HOME/.archiso/releng/profiledef.sh"
echo ")" >> "$HOME/.archiso/releng/profiledef.sh"

echo "%wheel ALL=(ALL) ALL" > "${root_etc}/sudoers"

# Create image
mkdir -p "${workdir}"
nice -n 19 ionice -c 3 sudo mkarchiso -w "${workdir}" -o "${dir}/output" "${prof_dir}"

exit 0

# To-Dos
# - NetworkManager?
# - SDDM Loginscreen?