#!/bin/bash

SM_DIR={{ smartgears_install_path }}
SM_CONF_F={{ smartgears_user_home }}/.containerxml/1-container.xml
SM_CONF_TOKENS_F={{ smartgears_user_home }}/.containerxml/2-container.xml
SM_CONF_TAIL_F={{ smartgears_user_home }}/.containerxml/3-container.xml
SM_CONF_SCOPES_F=/usr/local/etc/scopes.list
SM_CONF_DEST_F=${SM_DIR}/container.xml
SM_LIB_DIR=${SM_DIR}/lib
SM_STATE_DIR=${SM_DIR}/state/
GET_KEYS_SCRIPT=/usr/local/bin/get-gcube-keys
GET_SCOPES_SCRIPT=/usr/local/bin/get-scopes
SVC=tomcat-instance-{{ smartgears_http_port }}
TOMCAT_DEFAULT=/etc/default/${SVC}
LOG_FILE=/var/log/smartgears-node-setup.log
HOSTS_FILE=/etc/hosts
FQDN_HOST=
PUB_FQDN_HOST=
PUBLIC_IP=
MAIN_IP=
RETVAL=0
CLOUD_INSTANCE_DIR=/var/lib/cloud/instance
MEM=$( free -m | egrep ^Mem | awk '{ print $2 }'  )
JAVA_MAX_HEAP=$( expr $MEM - 2048 )

# Init some variables that should be passed
if [ -z "${SMARTGEARS_SCOPES}" ] ; then
    SMARTGEARS_SCOPES=
fi
if [ -z "${HOST}" ] ; then
    HOST=
fi

{% raw %}
> $LOG_FILE
function setup_hostname() {
    echo "-- setup_hostname" >> $LOG_FILE
    if [ -z "${HOST}" ] ; then
        echo "No hostname was passed from the outside. Trying to find it out by ourselves" >> $LOG_FILE
        FQDN_HOST=$( /bin/hostname -f )
        if [ -z "${FQDN_HOST}" ] ; then
            echo "The machine has no FQDN. Revert to plain hostname if available" >> $LOG_FILE
            HOST=$( /bin/hostname )
            echo "Setting the plain hostname: $HOST" >> $LOG_FILE
        else
            HOST=$FQDN_HOST
        fi
    fi
}

function find_public_ip() {
    echo "-- find_public_ip" >> $LOG_FILE
    # We don't know if we have been assigned a private or public IP address
    PUBLIC_IP=$( wget http://ipecho.net/plain -qO - )
    MAIN_IP=$( ip addr show scope global dev eth0 | grep inet | awk '{ print $2 }' | cut -d "/" -f 1 )
    echo "Our main IP is ${MAIN_IP}" >> $LOG_FILE
    if [ -z $PUBLIC_IP ] ; then
        # We have some kind of problem
        echo "We cannot obtain our public IP from outside. Using our main IP address as public IP" >> $LOG_FILE
        PUBLIC_IP=$MAIN_IP
    else
        echo "Our public IP is ${PUBLIC_IP}"  >> $LOG_FILE
    fi
    # Try to know our public FQDN
    TMP_FQDN_HOST=$( host $PUBLIC_IP )
    RET_FQDN=$?
    if [ $RET_FQDN -eq 0 ] ; then
        PUB_FQDN_HOST=$( host $PUBLIC_IP | awk '{print $5}' | sed -e 's/\.$//g' )
    fi
}

function modify_hosts_file() {
    echo "-- modify_hosts_file" >> $LOG_FILE
    # Set the hosts file with the new data
    grep -v $HOST $HOSTS_FILE > $HOSTS_FILE.tmp
    if [ "${FQDN_HOST}" == "${HOST}" ] ; then
        FQDN_HOST=${HOST}.localhost
    fi
    echo "${PUBLIC_IP} ${FQDN_HOST} ${PUB_FQDN_HOST} ${HOST}" >> $HOSTS_FILE.tmp
    mv $HOSTS_FILE.tmp $HOSTS_FILE
    chmod 644 $HOSTS_FILE
    chown root:root $HOSTS_FILE
}
    
function smartgears_config_parameters_check() {
    echo "-- smartgears_config_parameters_check" >> $LOG_FILE
    if [ -z "${INFRA_NAME}" ] ; then
        echo "The infrastructure name is void" >> $LOG_FILE
        RETVAL=1
    fi
    if [ -z "${COUNTRY}" ] ; then
        echo "The country code is void, setting a default" >> $LOG_FILE
        export COUNTRY="IT"
    elif [ ${#COUNTRY} -ne 2 ] ; then
        echo "The country code is wrong. It must be two characters long" >> $LOG_FILE
        RETVAL=1
    fi
    if [ $RETVAL -eq 1 ] ; then
        echo "Exiting because of errors. The SmartExecutor will not start" >> $LOG_FILE
        exit 1
    fi
}

function populate_head_containerxml() {
    echo "-- populate_head_containerxml" >> $LOG_FILE
    # We use the public FQDN if there's one. Otherwise we use the public IP
    if [ ! -z ${PUB_FQDN_HOST} ] ; then
        sed -i -e "s#@SMARTGEARS_HOSTNAME@#${PUB_FQDN_HOST}#g" $SM_CONF_F
    else
        sed -i -e "s#@SMARTGEARS_HOSTNAME@#${PUBLIC_IP}#g" $SM_CONF_F
    fi
    sed -i -e "s#@SMARTGEARS_INFRASTRUCTURE_NAME@#${INFRA_NAME}#g" $SM_CONF_F
    sed -i -e "s#@SMARTGEARS_VO_NAME@#${SCOPE}#g" $SM_CONF_F
    sed -i -e "s#@SMARTGEARS_COUNTRY@#${COUNTRY}#g" $SM_CONF_F
    sed -i -e "s#@SMARTGEARS_LOCATION@#${LOCATION}#g" $SM_CONF_F
}

{% endraw %}

function set_scopes_list() {
    echo "-- set_scopes_list" >> $LOG_FILE
    if [ -z "${SMARTGEARS_SCOPES}" ] ; then
        SMARTGEARS_SCOPES=""
        echo "No scopes were defined" >> $LOG_FILE
    else
        echo "The scopes list is $SMARTGEARS_SCOPES" >> $LOG_FILE
    fi
    echo "SCOPES_LIST='${SMARTGEARS_SCOPES}'" > $SM_CONF_SCOPES_F
}

function fix_get_scopes() {
    echo "-- fix_get_scopes" >> $LOG_FILE
    # We use the public FQDN if there's one. Otherwise we use the public IP
    if [ ! -z ${PUB_FQDN_HOST} ] ; then
        sed -i -e "s#@SMARTGEARS_HOSTNAME@#${PUB_FQDN_HOST}#g" $GET_SCOPES_SCRIPT
    else
        sed -i -e "s#@SMARTGEARS_HOSTNAME@#${PUBLIC_IP}#g" $GET_SCOPES_SCRIPT
    fi
}

function get_smartgears_scope_tokens() {
    # The SMARTGEARS_TOKEN variable need to be set outside the contextualization script
    echo "-- get_smartgears_scope_tokens" >> $LOG_FILE
    if [ -z "${SMARTGEARS_TOKEN}" ] ; then
        echo "No infrastructure token was passed, aborting" >> $LOG_FILE
        echo "" > $SM_CONF_TOKENS_F
    else
        $GET_SCOPES_SCRIPT $( echo ${SMARTGEARS_TOKEN}) >> $LOG_FILE
    fi
}

function merge_container_xml() {
    echo "-- merge_container_xml: compose the file" >> $LOG_FILE
    cat $SM_CONF_F $SM_CONF_TOKENS_F $SM_CONF_TAIL_F > $SM_CONF_DEST_F
    chown gcube:gcube $SM_CONF_DEST_F
    chmod 640 $SM_CONF_DEST_F
}

function get_gcube_keys() {
    echo "-- get_gcube_keys" >> $LOG_FILE
    # Get and install the gcube security keys
    if [ -x $GET_KEYS_SCRIPT ] ; then
        echo "Getting the infrastructure keys" >> $LOG_FILE
        $GET_KEYS_SCRIPT ${INFRA_NAME} >> $LOG_FILE
        rm -f $GET_KEYS_SCRIPT
        echo "Done" >> $LOG_FILE
    else
        echo "Not getting the infrastructure keys, the script is not available." >> $LOG_FILE
    fi
}

function set_java_heap() {
    echo "-- set_java_heap" >> $LOG_FILE
    if [ $JAVA_MAX_HEAP -lt 1024 ] ; then
        JAVA_MAX_HEAP=1024
    fi
    grep -v ^JAVA_HEAP $TOMCAT_DEFAULT > $TOMCAT_DEFAULT.tmp
    echo "JAVA_HEAP='-Xms${JAVA_MAX_HEAP}m -Xmx${JAVA_MAX_HEAP}m'" > $TOMCAT_DEFAULT.heap
    cat $TOMCAT_DEFAULT.heap $TOMCAT_DEFAULT.tmp > $TOMCAT_DEFAULT
}

function cleanup_cloud_user_data() {
    # Remove the token from the use provided data file
    echo "-- cleanup_cloud_user_data" >> $LOG_FILE
    grep -v SMARTGEARS_TOKEN $CLOUD_INSTANCE_DIR/user-data.txt > $CLOUD_INSTANCE_DIR/user-data.txt.tmp
    mv $CLOUD_INSTANCE_DIR/user-data.txt.tmp $CLOUD_INSTANCE_DIR/user-data.txt
    grep -v SMARTGEARS_TOKEN $CLOUD_INSTANCE_DIR/user-data.txt.i > $CLOUD_INSTANCE_DIR/user-data.txt.i.tmp
    mv $CLOUD_INSTANCE_DIR/user-data.txt.i.tmp $CLOUD_INSTANCE_DIR/user-data.txt.i
}

##############################
#
# Main
#

/etc/init.d/${SVC} stop >> $LOG_FILE 2>&1
rm -fr ${SM_STATE_DIR}/*
rm -f ${SM_DIR}/ghn.log

setup_hostname
find_public_ip
modify_hosts_file
smartgears_config_parameters_check
set_scopes_list
populate_head_containerxml
fix_get_scopes
get_smartgears_scope_tokens
merge_container_xml
get_gcube_keys
set_java_heap
cleanup_cloud_user_data

/usr/sbin/update-rc.d  ${SVC} enable >> $LOG_FILE 2>&1
/etc/init.d/${SVC} start >> $LOG_FILE 2>&1

exit 0