readonly QEMU=$(systemd-detect-virt);
readonly REC_DIR="recommendation_templates";

rec_template_names="disk_usage cpu_load free_memory";

for alert in $rec_template_names; do
        rec_template="${alert}_recommendations.sh";
        source "$(dirname "${BASH_SOURCE[0]}")/$REC_DIR/${rec_template}";
done;

cant_upgrade_a_mega_server(){
        echo "Sadly, upgrading your server is not possible, as you are already using one of our most powerful servers available.";
}

plan_upgrade_recommendation_if_optimization_fails(){
        is_not_mega_server && {
                if [[ ! $QEMU =~ ^none$ && $VIRT_CORE_COUNT -lt $VPS_HYPERNOVA_CPU ]]; then
                        echo "In case optimization has little effect, consider upgrading your hosting plan.
You can find our VPS and dedicated server hosting plans by using the following links:
https://www.namecheap.com/hosting/vps/
https://www.namecheap.com/hosting/dedicated-servers/";
                else
                        echo "In case optimization has little effect, consider upgrading your hosting plan.
You can find our dedicated server hosting plans by using the following link:
https://www.namecheap.com/hosting/dedicated-servers/";
                fi;
        } || {
                cant_upgrade_a_mega_server;
        };
}

plan_upgrade_recommendation_as_alternative(){
        is_not_mega_server && {
                if [[ ! $QEMU =~ ^none$ && $VIRT_CORE_COUNT -lt $VPS_HYPERNOVA_CPU ]]; then
                        echo "As an alternative, consider upgrading your hosting plan.
You can find our VPS and dedicated server hosting plans by using the following links:
https://www.namecheap.com/hosting/vps/
https://www.namecheap.com/hosting/dedicated-servers/";
                else
                        echo "As an alternative, consider upgrading your hosting plan.
You can find our dedicated server hosting plans by using the following link:
https://www.namecheap.com/hosting/dedicated-servers/";
                fi;
        } || {
                cant_upgrade_a_mega_server;
        };
}

is_not_mega_server(){
        local cpu_upgrade="cpu_load_check_main";
        local ram_upgrade="memory_check_main";
        local max_cpu_cores=64;
        local max_ram=134000000000; # max ram on our top server is actually 134 489 817 088, but let's keep it a secret
        local cur_max_ram=$(free -b | grep -i mem: | awk '{print $2}');

        if [[ ${FUNCNAME[@]} =~ $cpu_upgrade ]]; then
                if [[ $VIRT_CORE_COUNT -lt $max_cpu_cores ]]; then
                        return 0;
                else
                        return 1;
                fi;
        elif [[ ${FUNCNAME[@]} =~ $ram_upgrade ]]; then
                if [[ $cur_max_ram -lt $max_ram ]]; then
                        return 0;
                else
                        return 1;
                fi;
        else
                if [[ $VIRT_CORE_COUNT -lt $max_cpu_cores || $cur_max_ram -lt $max_ram ]]; then
                        return 0;
                else
                        return 1;
                fi;
        fi;
}