#!/bin/bash

set -e -o pipefail

cd {{ backup_folder }}
if [ -f {{ backup_lock }} ]; then
    echo "Backup lock! Cannot procceed as lock '{{ backup_lock }}' exist."
    echo "Associated PID is $(cat {{ backup_lock }})"
    exit 1
fi

echo "$$" > {{ backup_lock }}
BKPTIMESTAMP=$(date +"%y-%m-%d.%H")
BKP=$BKPTIMESTAMP"_backup"


# generate rolling folder
{% for target in backup_targets %}
{% for host in backup_hosts %}
{% if 'domain' in host %}
mkdir -p {{ target }}/{{ host.name + '_' + host.domain }}/$BKP
{% elif 'ip' in host %}
mkdir -p {{ target }}/{{ host.name + '_' + host.ip }}/$BKP
{% endif %}
{% endfor %}
{% endfor %}


# pull backups
{% for target in backup_targets %}
{% for host in backup_hosts %}
{% if 'domain' in host %}
rsync --rsh='ssh -p{{ ssh_port }} -i ~{{ backup_owner }}/.ssh/id_rsa'  -chav --stats --ignore-missing-args {{ backup_owner }}@{{ host.domain }}:{{ backup_folder }}/{{ target }}.tgz {{ target }}/{{ host.name + '_' + host.domain }}/$BKP
{% elif 'ip' in host %}
rsync --rsh='ssh -p{{ ssh_port }} -i ~{{ backup_owner }}/.ssh/id_rsa' -chav --stats --ignore-missing-args {{ backup_owner }}@{{ host.ip }}:{{ backup_folder }}/{{ target }}.tgz {{ target }}/{{ host.name + '_' + host.ip }}/$BKP
{% endif %}
{% endfor %}
{% endfor %}


# link to latest
{% for target in backup_targets %}
{% for host in backup_hosts %}
{% if 'domain' in host %}
ln -sf {{ backup_folder }}/{{ target }}/{{ host.name + '_' + host.domain }}/$BKP {{ backup_folder }}/{{ target }}/{{ host.name + '_' + host.domain }}/LATEST
{% elif 'ip' in host %}
ln -sf {{ backup_folder }}/{{ target }}/{{ host.name + '_' + host.ip }}/$BKP {{ backup_folder }}/{{ target }}/{{ host.name + '_' + host.ip }}/LATEST
{% endif %}
{% endfor %}
{% endfor %}


# keep only last {{ backup_keep_days * ( backup_times_hour | length ) }}
{% for target in backup_targets %}
{% for host in backup_hosts %}
{% if 'domain' in host %}
DELETE_LIST=$(ls -1dtr {{ target }}/{{ host.name + '_' + host.domain }}/* | head -n -{{ backup_keep_days * ( backup_times_hour | length ) }})
{% elif 'ip' in host %}
DELETE_LIST=$(ls -1dtr {{ target }}/{{ host.name + '_' + host.ip }}/* | head -n -{{ backup_keep_days * ( backup_times_hour | length ) }})
{% endif %}
if (( $( echo $DELETE_LIST | wc -w ) > 0 )); then
    rm -rf $DELETE_LIST
fi
{% endfor %}
{% endfor %}


rm {{ backup_lock }}