#!/bin/bash

set -e

command_exists () {
	type "$1" &> /dev/null;
}

check_hardware () {
    DISK_REQUIREMENTS=40960;
    MEMORY_REQUIREMENTS=5500;
    CORE_REQUIREMENTS=2;

	AVAILABLE_DISK_SPACE=$(df -m /  | tail -1 | awk '{ print $4 }');

	if [ ${AVAILABLE_DISK_SPACE} -lt ${DISK_REQUIREMENTS} ]; then
		echo "Minimal requirements are not met: need at least $DISK_REQUIREMENTS MB of free HDD space"
		exit 1;
	fi

	TOTAL_MEMORY=$(free -m | grep -oP '\d+' | head -n 1);

	if [ ${TOTAL_MEMORY} -lt ${MEMORY_REQUIREMENTS} ]; then
		echo "Minimal requirements are not met: need at least $MEMORY_REQUIREMENTS MB of RAM"
		exit 1;
	fi

	CPU_CORES_NUMBER=$(cat /proc/cpuinfo | grep processor | wc -l);

	if [ ${CPU_CORES_NUMBER} -lt ${CORE_REQUIREMENTS} ]; then
		echo "The system does not meet the minimal hardware requirements. CPU with at least $CORE_REQUIREMENTS cores is required"
		exit 1;
	fi
}

if [ "$SKIP_HARDWARE_CHECK" != "true" ]; then
	check_hardware
fi

ARCH="$(dpkg --print-architecture)"
if [ "$ARCH" != "amd64" ]; then
    echo "ONLYOFFICE ${product^^} doesn't support architecture '$ARCH'"
    exit;
fi

REV=`cat /etc/debian_version`
DIST='Debian'
if [ -f /etc/lsb-release ] ; then
        DIST=`cat /etc/lsb-release | grep '^DISTRIB_ID' | awk -F=  '{ print $2 }'`
        REV=`cat /etc/lsb-release | grep '^DISTRIB_RELEASE' | awk -F=  '{ print $2 }'`
        DISTRIB_CODENAME=`cat /etc/lsb-release | grep '^DISTRIB_CODENAME' | awk -F=  '{ print $2 }'`
        DISTRIB_RELEASE=`cat /etc/lsb-release | grep '^DISTRIB_RELEASE' | awk -F=  '{ print $2 }'`
elif [ -f /etc/lsb_release ] || [ -f /usr/bin/lsb_release ] ; then
        DIST=`lsb_release -a 2>&1 | grep 'Distributor ID:' | awk -F ":" '{print $2 }' | tr -d '[:space:]'`
        REV=`lsb_release -a 2>&1 | grep 'Release:' | awk -F ":" '{print $2 }' | tr -d '[:space:]'`
        DISTRIB_CODENAME=`lsb_release -a 2>&1 | grep 'Codename:' | awk -F ":" '{print $2 }' | tr -d '[:space:]'`
        DISTRIB_RELEASE=`lsb_release -a 2>&1 | grep 'Release:' | awk -F ":" '{print $2 }' | tr -d '[:space:]'`
elif [ -f /etc/os-release ] ; then
        DISTRIB_CODENAME=$(grep "VERSION=" /etc/os-release |awk -F= {' print $2'}|sed s/\"//g |sed s/[0-9]//g | sed s/\)$//g |sed s/\(//g | tr -d '[:space:]')
        DISTRIB_RELEASE=$(grep "VERSION_ID=" /etc/os-release |awk -F= {' print $2'}|sed s/\"//g |sed s/[0-9]//g | sed s/\)$//g |sed s/\(//g | tr -d '[:space:]')
fi

DIST=`echo "$DIST" | tr '[:upper:]' '[:lower:]' | xargs`;
DISTRIB_CODENAME=`echo "$DISTRIB_CODENAME" | tr '[:upper:]' '[:lower:]' | xargs`;