#!/bin/bash

ask_envs() {

	echo "Public proxy? (y/N)";
	read -r ANSWER;
	if [ "$ANSWER" == "y" ] || [ "$ANSWER" == "Y" ]; then
		PUBLIC_PROXY="yes";
	else
		PUBLIC_PROXY="no";
	fi

	echo "Smarthost proxy? (Y/n)";
	read -r ANSWER;
	if [ "$ANSWER" == "n" ] || [ "$ANSWER" == "N" ]; then
		SMARTHOST_PROXY="no";
	else
		SMARTHOST_PROXY="yes";
	fi

	echo "Local proxy? (Y/n)";
	read -r ANSWER;
	if [ "$ANSWER" == "n" ] || [ "$ANSWER" == "N" ]; then
		LOCAL_PROXY="no";
	else
		LOCAL_PROXY="yes";
	fi

	echo "VPN proxy? (Y/n)";
	read -r ANSWER;
	if [ "$ANSWER" == "n" ] || [ "$ANSWER" == "N" ]; then
		VPN_PROXY="no";
	else
		VPN_PROXY="yes";
	fi

	echo "Cron? (Y/n)";
	read -r ANSWER;
	if [ "$ANSWER" == "n" ] || [ "$ANSWER" == "N" ]; then
		CRON="no";
	else
		CRON="yes";
	fi

	echo "Please add the letsencrypt mail address:";
	while read -r LETSENCRYPT_MAIL; do
                if [ "$LETSENCRYPT_MAIL" != "" ]; then
                        if [ "$(echo "$LETSENCRYPT_MAIL" | grep '@')" != "" ]; then
                                if [ "$(echo "$LETSENCRYPT_MAIL" | grep '\.')" != "" ]; then
                                        break;
                                fi;
                        fi;
                fi;
                echo "Invalid email address.";
	done
}

check_dirs_and_files() {

	if [ ! -d "/etc/user/config" ]; then
		mkdir -p "/etc/user/config"
	fi;
	if [ ! -d "/etc/system" ]; then
		mkdir "/etc/system"
	fi;

	if [ ! -f "/etc/user/config/system.json" ]; then
		{
			echo '
{
	"NETWORK": {
		"IP_POOL_START": "172.19.0.0",
		"IP_POOL_END": "172.19.254.0",
		"IP_SUBNET": "24"
	}
}
';
		} > "/etc/user/config/system.json"
	fi;

	{
		echo "alias service-debian='docker run --rm \
 -w /services/ \
 -e DOCKER_REGISTRY_URL=registry.format.hu \
 -e USER_INIT_PATH=/etc/user/config \
 -e CA_PATH=/etc/ssl/certs \
 -e DNS_DIR=/etc/system/data/dns \
 -e HOST_FILE=/etc/dns/hosts.local \
 -v /etc/system/data/dns:/etc/dns:rw \
 -v /etc/ssl/certs:/etc/ssl/certs:ro \
 -v /etc/user/config/user.json:/etc/user/config/user.json:ro \
 -v /etc/user/config/system.json:/etc/user/config/system.json:ro \
 -v /etc/user/config/services/:/services/:ro \
 -v /etc/user/config/services/tmp:/services/tmp:rw \
 -v /var/run/docker.sock:/var/run/docker.sock \
 -v /usr/bin/docker:/usr/bin/docker:ro \
 registry.format.hu/setup'";

		echo "alias service-galaxis='docker run --rm \
 -w /services/ \
 -e DOCKER_REGISTRY_URL=registry.galaxis.xyz \
 -e USER_INIT_PATH=/etc/user/data/galaxis \
 -e CA_PATH=/etc/ssl/certs \
 -e DNS_DIR=/etc/system/data/dns \
 -e HOST_FILE=/etc/dns/hosts.local \
 -v /etc/system/data/dns:/etc/dns:rw \
 -v /etc/ssl/certs:/etc/ssl/certs:ro \
 -v /etc/user/data/galaxis/user.json:/etc/user/data/galaxis/user.json:ro \
 -v /etc/user/data/galaxis/system.json:/etc/user/data/galaxis/system.json:ro \
 -v /etc/user/data/galaxis/services/:/services/:ro \
 -v /etc/user/data/galaxis/services/tmp:/services/tmp:rw \
 -v /var/run/docker.sock:/var/run/docker.sock \
 -v /usr/bin/docker:/usr/bin/docker:ro \
 registry.galaxis.xyz/setup'";

	} > $HOME/.bash_aliases

}

check_running() {
	
	DOCKERD_STATUS=$(systemctl status docker | grep running | wc -l)
	if [ "$DOCKERD_STATUS" == "0" ]; then 
		systemctl start docker
		sleep 5;
		DOCKERD_STATUS=$(systemctl status docker | grep running | wc -l)
		if [ "$DOCKERD_STATUS" == "0" ]; then 
			echo "Docker daemon not running, please check and execute again install script";
			exit;
		fi
	fi
	
	# bridge check
	BRIDGE_NUM=$(docker network ls | grep bridge | awk '{print $2":"$3}' | sort | uniq | wc -l);

	CONTAINER_NUM=$(docker ps -a | wc -l);

	if [ "$BRIDGE_NUM" != "1" ] && [ "$CONTAINER_NUM" != "1" ]; then

		echo "There are existsing containers and/or networks.";
		echo "Please select from the following options (1/2/3):";

		echo "1 - Delete all existing containers and networks before installation";
		echo "2 - Stop the installation process";
		echo "3 - Just continue on my own risk";
		
		read -r ANSWER;

		if [ "$ANSWER" == "1" ]; then
			echo "1 - Removing exising containers and networks";
			# delete and continue
			docker stop $(docker ps |grep Up | awk '{print $1}')
			docker system prune -a

		elif [ "$ANSWER" == "3" ]; then
			echo "3 - You have chosen to continue installation process."

		else # default: 2 - stop installastion
			echo "2 - Installation process was stopped";
			exit;
		fi;

	fi;
}

install_docker() {

	# set package names
	CONTAINERD="containerd.io_"$CONTAINERD_VERSION"_"$DOCKER_ARCH".deb";
	DOCKER_CE="docker-ce_"$DOCKER_VERSION"_"$DOCKER_ARCH".deb";
	DOCKER_CE_CLI="docker-ce-cli_"$DOCKER_VERSION"_"$DOCKER_ARCH".deb";
	#DOCKER_BUILDX="docker-buildx-plugin_"$DOCKER_VERSION"_"$DOCKER_ARCH".deb";
	#DOCKER_COMPOSE="docker-compose-plugin_"$DOCKER_VERSION"_"$DOCKER_ARCH".deb";

	CONTAINERD_INSTALLED=$(dpkg -s containerd.io | wc -l);
	if [ "$CONTAINERD_INSTALLED" == "0" ]; then
		# Download debian package
		echo "Download package from: " $DOCKER_URL$CONTAINERD;
		wget -O $PKG_DIR/$CONTAINERD $DOCKER_URL$CONTAINERD;

		# Install package
		dpkg -i $PKG_DIR/$CONTAINERD;
	fi;

	DOCKERCE_INSTALLED=$(dpkg -s docker-ce | wc -l);
	if [ "$DOCKERCE_INSTALLED" == "0" ]; then
		# Download debian package
		echo "Download package from: " $DOCKER_URL$DOCKER_CE;
		wget -O $PKG_DIR/$DOCKER_CE $DOCKER_URL$DOCKER_CE;

		# Install package
		dpkg -i $PKG_DIR/$DOCKER_CE;
	fi;

	DOCKERCECLI_INSTALLED=$(dpkg -s docker-ce-cli | wc -l);
	if [ "$DOCKERCECLI_INSTALLED" == "0" ]; then
		# Download debian package
		echo "Download package from: " $DOCKER_URL$DOCKER_CE_CLI;
		wget -O $PKG_DIR/$DOCKER_CE_CLI $DOCKER_URL$DOCKER_CE_CLI;

		# Install package
		dpkg -i $PKG_DIR/$DOCKER_CE_CLI;
	fi;

	# verify ???
	systemctl start docker

	# remove downloaded packages ???
	# rm $PKG_DIR/$CONTAINERD $PKG_DIR/$DOCKER_CE $PKG_DIR/$DOCKER_CE_CLI $PKG_DIR/$DOCKER_BUILDX $PKG_DIR/$DOCKER_COMPOSE

}

# set variables to install docker from debian packages
DOCKER_URL="https://download.docker.com/linux/debian/dists/bullseye/pool/stable/amd64/";
CONTAINERD_VERSION="1.6.20-1";
DOCKER_VERSION="23.0.5-1~debian.11~bullseye";
DOCKER_ARCH="amd64";
PKG_DIR="/tmp"

#install_docker;
# install docker using apt-get
echo exit 101 > /usr/sbin/policy-rc.d
chmod +x /usr/sbin/policy-rc.d
apt-get update
apt-get install ca-certificates curl gnupg
install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
chmod a+r /etc/apt/keyrings/docker.gpg
. /etc/os-release;
echo "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian "$VERSION_CODENAME" stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null

apt-get -y install --no-install-recommends docker-ce docker-ce-cli containerd.io
sleep 5

check_running;

check_dirs_and_files;

ask_envs;

docker run \
--volume $HOME/.ssh/installer:/root/.ssh/id_rsa \
--env PUBLIC_PROXY=$PUBLIC_PROXY \
--env SMARTHOST_PROXY=$SMARTHOST_PROXY \
--env LOCAL_PROXY=$LOCAL_PROXY \
--env VPN_PROXY=$VPN_PROXY \
--env CRON=$CRON \
--volume /etc/user/:/etc/user/ \
--volume /etc/system/:/etc/system/ \
--env LETSENCRYPT_MAIL=$LETSENCRYPT_MAIL registry.format.hu/proxy-deployment-tool

# test - alias doesn't work inside a function
shopt -s expand_aliases
source $HOME/.bash_aliases
service-debian core-dns start info