#!/bin/bash
source /bin/sx-lib.sh


function check_nodejs_environment {
    check_environment
    if [ ! -v APP_PATH ]; then
        APP_PATH="/data"
        export APP_PATH
    fi
    if [ ! -v LOG_PATH ]; then
        LOG_PATH="/logs"
        export LOG_PATH
    fi
}

function display_container_nodejs_header {
    echo "+====================================================="
    echo "| Container   : $HOSTNAME"
    echo "| OS          : $(</etc/redhat-release)"
    echo "| Engine      : $(node -v | head -1)" 
    if [ -v CONTAINER_TYPE ]; then
        echo "| Type        : $CONTAINER_TYPE"
    fi
    if [ -v CONTAINER_SERVICE ]; then
        echo "| Service     : $CONTAINER_SERVICE"
    fi
    if [ -v CONTAINER_INSTANCE ]; then
        echo "| Instance    : $CONTAINER_INSTANCE"
    fi
    if [ -v APP_PATH ]; then
        echo "| App path    : $APP_PATH"
    fi
    if [ -v LOG_PATH ]; then
        echo "| Log path    : $LOG_PATH"
    fi
    echo "+====================================================="
}

# Begin configuration before starting daemonized process
# and start generating host keys
function begin_config {
    echo "=> BEGIN NODEJS CONFIGURATION"
    if [[ -d $TMP_APP_PATH ]]; then
        if [ "$(ls -A $TMP_APP_PATH)" ]; then
            echo "COPY application from $TMP_APP_PATH into $APP_PATH"
            FILE_LIST=$(find $TMP_APP_PATH -maxdepth 1 -mindepth 1 -printf "%f\n")
            for FILE in $FILE_LIST; do 
                echo -n "adding $APP_PATH/$FILE"
                cp -r $TMP_APP_PATH/$FILE $APP_PATH/
                echo " DONE"
            done
        fi
    fi
}

# End configuration process just before starting daemon
function end_config {
    echo "=> END NODEJS CONFIGURATION"
}

function stop_nodejs_handler {
    killall node
    echo "+=====================================================" | tee -a $STARTUPLOG
    echo "| Container $HOSTNAME is now STOPPED" | tee -a $STARTUPLOG
    echo "+=====================================================" | tee -a $STARTUPLOG
    exit 143; # 128 + 15 -- SIGTERM
}

# Start the nodejs executable with application entrypoint
# the running shell
function start_service_nodejs {
    trap 'kill ${!}; stop_nodejs_handler' SIGHUP SIGINT SIGQUIT SIGTERM SIGKILL SIGSTOP SIGCONT
    echo "+=====================================================" | tee -a $STARTUPLOG
    echo "| Container $HOSTNAME is now RUNNING" | tee -a $STARTUPLOG
    echo "+=====================================================" | tee -a $STARTUPLOG
    exec node $APP_MAIN 
}

check_nodejs_environment | tee -a $STARTUPLOG
display_container_nodejs_header | tee -a $STARTUPLOG
begin_config | tee -a $STARTUPLOG
end_config | tee -a $STARTUPLOG
start_service_nodejs