#!/bin/sh

[ "${EUID:-$(id -u)}" -eq 0 ] || { >&2 echo "Please run this as root."; exit 1; }

ZSHENV_PATH="/etc/zshenv"

case "$(realpath $ZSHENV_PATH)" in
	*"/nix/"* )
		ZSHENV_PATH="/etc/zshenv.local"
		;;
esac 

case "$OSTYPE" in
	"darwin"* )  # We can't access ZI_IS_DARWIN just yet, so we'll do it manually
		# REF: https://github.com/null2264/Hackintosh-L460?tab=readme-ov-file#bluetooth-workaround
		BT_ADDRESS="$(system_profiler SPBluetoothDataType | grep "Address:" | head -1 | sed "s/ *Address: \(.*\)/\1/g")"
		[ "$BT_ADDRESS" = "" ] && \
		__EXTRA="" || \
		__EXTRA="export BT_DEVICE_ADDRESS=\"$BT_ADDRESS\""
		;;
	* )
		__EXTRA=""
		;;
esac

echo_config() {
	echo "#!/bin/zsh"
	[ "$__EXTRA" = "" ] || echo ""
	echo "$__EXTRA"
	echo "export ZDOTDIR=\"\${XDG_CONFIG_HOME:-\$HOME/.config}/zsh\""
	echo "[ -d \$ZDOTDIR ] || mkdir -p \$ZDOTDIR"
}

echo_config > /tmp/__zshenv || exit 1
echo "========/etc/zshenv========="
cat /tmp/__zshenv
echo "============================"
mv -i /tmp/__zshenv $ZSHENV_PATH
ln -si $ZSHENV_PATH /etc/zsh/zshenv