#!/bin/bash

ACTION="$1"
PKG="$2"

case $ACTION in

	addRepoKeys)		

		echo "[EPI]:Adding repository key..."
		apt-get install --yes apt-transport-https ca-certificates curl gnupg-agent software-properties-common
		
		curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key --keyring /tmp/epi_keyring add -

	
	;;

	preInstall)
	
		echo "[EPI]:Preparing installation..."
		if dpkg-query -l $PKG>/dev/null 2>&1;then

			echo "Nothing to do"
		else
			OLD_PACKAGES="docker docker-engine docker.io containerd runc"
			for ix in $OLD_PACKAGES
			do
				if dpkg-query -l $ix>/dev/null 2>&1;then
					apt-get remove --yes $ix
				fi
			done

		fi	

	;;
	postInstall)
		if [ -f "/usr/bin/docker-compose" ]; then
		    echo "Skipping docker-compose installation..."
		else
		    echo "[EPI]:Installing docker-compose from github..."
		    TAG="$(curl -sSL "https://github.com/docker/compose/releases/latest" | sed -nr 's@.*compose/releases/tag/v([1-9]+(\.[0-9]+)*)".*@\1@p' | tr ' ' '\n'|sort -n|uniq|tail -1)"
		    nTAG="$(echo ${TAG}|wc -w)"
		    if [ -z "${nTAG}" -o "x${nTAG}" != "x1" ];then
		        echo "[EPI]:fail installing docker-compose! from tag"
		        exit 1
		    fi
		    if [ -n "${TAG}" ]; then
			echo "[EPI]:Downloading docker-compose version ${TAG}"
			curl -sSL "https://github.com/docker/compose/releases/download/v${TAG}/docker-compose-$(uname -s)-$(uname -m)" -o /tmp/docker-compose
		    fi
		    if [ -f "/tmp/docker-compose" -a -n "$(file /tmp/docker-compose|grep -o 'ELF 64-bit')" ]; then
			mv /tmp/docker-compose /usr/bin/docker-compose
			chmod +x /usr/bin/docker-compose
			echo "[EPI]:docker-compose installed!"
		    else
		        echo "[EPI]:fail installing docker-compose!"
		        exit 1
		    fi
		fi
	;;

esac
exit 0