# This script is meant to be sourced.
# It's not for directly running.
function print_os_group_id(){
    printf "${STY_CYAN}"
    printf "===INFO===\n"
    printf "Detected OS_DISTRO_ID: ${OS_DISTRO_ID}\n"
    printf "Detected OS_DISTRO_ID_LIKE: ${OS_DISTRO_ID_LIKE}\n"
    printf "Determined OS_GROUP_ID: ${OS_GROUP_ID}\n"
    printf "==========\n\n"
    printf "${STY_RST}"
}
function print_os_group_id_alike(){
    printf "${STY_YELLOW}"
    printf "===WARNING===\n"
    printf "Your OS_GROUP_ID has been determined by \"alike\" match.\n"
    printf "Ideally, it should also work for your distro.\n"
    printf "Still, there is a chance that it not works as expected or even fails.\n"
    printf "Proceed only at your own risk.\n"
    printf "=============\n\n"
    printf "${STY_RST}"
}
function print_os_group_id_unofficial(){
    printf "${STY_PURPLE}"
    printf "===NOTICE===\n"
    printf "The support for your distro is provided by the community.\n"
    printf "It is not officially supported by github:end-4/dots-hyprland .\n"
    printf "${STY_BOLD}"
    printf "If you find out any problems about it, PR is welcomed if you are able to address it.\n"
    printf "Or, create a discussion about it, but please do not submit issue, \n"
    printf "because the developers do not use this distro, therefore they cannot help.${STY_RST}\n"
    printf "${STY_PURPLE}"
    printf "Proceed only at your own risk.\n"
    printf "============\n\n"
    printf "${STY_RST}"
}
function print_os_group_id_unsupported(){
    printf "${STY_RED}"
    printf "===CAUTION===\n"
    printf "\"--via-nix\" is forcely specified \n"
    printf "as the only way to try to install on your distro.\n"
    printf "It is still experimental.\n"
    printf "Some functionalities are missing.\n"
    printf "It may also behave unexpectedly.\n"
    printf "Proceed only at your own risk.\n"
    printf "=============\n\n"
    printf "${STY_RST}"
    sleep 3
}
function print_os_group_id_fallback(){
    printf "${STY_RED}"
    printf "===CAUTION===\n"
    printf "Distro not recognized, determined as fallback.\n"
    printf "=============\n\n"
    printf "${STY_RST}"
}
function print_os_group_id_architecture(){
    printf "${STY_RED}"
    printf "===CAUTION===\n"
    printf "Detected machine architecture: ${MACHINE_ARCH}\n"
    printf "This script only supports x86_64.\n"
    printf "It is very likely to fail when installing dependencies on your machine.\n"
    printf "=============\n\n"
    printf "${STY_RST}"
}
#####################################################################################

####################
# Detect distro
# Helpful link(s):
# http://stackoverflow.com/questions/29581754
# https://github.com/which-distro/os-release
OS_RELEASE_FILE_CUSTOM="${REPO_ROOT}/os-release"
if test -f "${OS_RELEASE_FILE_CUSTOM}"; then
  printf "${STY_YELLOW}Warning: using custom os-release file \"${OS_RELEASE_FILE_CUSTOM}\".${STY_RST}\n"
  OS_RELEASE_FILE="${OS_RELEASE_FILE_CUSTOM}"
elif test -f /etc/os-release; then
  OS_RELEASE_FILE=/etc/os-release
else
  printf "${STY_RED}/etc/os-release does not exist, aborting...${STY_RST}\n" ; exit 1
fi
export OS_DISTRO_ID=$(awk -F'=' '/^ID=/ { gsub("\"","",$2); print tolower($2) }' ${OS_RELEASE_FILE} 2> /dev/null)
export OS_DISTRO_ID_LIKE=$(awk -F'=' '/^ID_LIKE=/ { gsub("\"","",$2); print tolower($2) }' ${OS_RELEASE_FILE} 2> /dev/null)


####################
# Determine distro ID

if [[ "$OS_DISTRO_ID" =~ ^(arch|endeavouros|cachyos)$ ]]; then
  OS_GROUP_ID="arch"
  print_os_group_id_functions=(print_os_group_id)
elif [[ "$OS_DISTRO_ID_LIKE" == "arch" ]]; then
  OS_GROUP_ID="arch"
  print_os_group_id_functions=(print_os_group_id{,_alike})
elif [[ "$OS_DISTRO_ID" == "gentoo" ]]; then
  OS_GROUP_ID="gentoo"
  print_os_group_id_functions=(print_os_group_id{,_unofficial})
elif [[ "$OS_DISTRO_ID_LIKE" == "gentoo" ]]; then
  OS_GROUP_ID="gentoo"
  print_os_group_id_functions=(print_os_group_id{,_alike,_unofficial})
elif [[ "$OS_DISTRO_ID" == "fedora" ]]; then
  OS_GROUP_ID="fedora"
  print_os_group_id_functions=(print_os_group_id{,_unofficial})
elif [[ "$OS_DISTRO_ID_LIKE" == "fedora" ]]; then
  OS_GROUP_ID="fedora"
  print_os_group_id_functions=(print_os_group_id{,_alike,_unofficial})
elif [[ "$OS_DISTRO_ID" =~ ^(opensuse-leap|opensuse-tumbleweed)$ ]] || [[ "$OS_DISTRO_ID_LIKE" =~ ^(opensuse|suse)(\ (opensuse|suse))?$ ]]; then
  OS_GROUP_ID="suse"
  INSTALL_VIA_NIX=true
  print_os_group_id_functions=(print_os_group_id{,_unsupported})
elif [[ "$OS_DISTRO_ID" == "debian" || "$OS_DISTRO_ID_LIKE" == "debian" ]]; then
  OS_GROUP_ID="debian"
  INSTALL_VIA_NIX=true
  print_os_group_id_functions=(print_os_group_id{,_unsupported})
else
  OS_GROUP_ID="fallback"
  INSTALL_VIA_NIX=true
  print_os_group_id_functions=(print_os_group_id{,_fallback,_unsupported})
fi

####################
# Detect architecture
# Helpful link(s):
# http://stackoverflow.com/questions/45125516
export MACHINE_ARCH=$(uname -m)
case "${MACHINE_ARCH}" in
  "x86_64") sleep 0;;
  *) print_os_group_id_functions+=(print_os_group_id_architecture);;
esac