#!/bin/bash

set -e

cecho() {
  local code="\033["
  case "$1" in
    black  | bk) color="${code}0;30m";;
    red    |  r) color="${code}1;31m";;
    green  |  g) color="${code}1;32m";;
    yellow |  y) color="${code}1;33m";;
    blue   |  b) color="${code}1;34m";;
    purple |  p) color="${code}1;35m";;
    cyan   |  c) color="${code}1;36m";;
    gray   | gr) color="${code}0;37m";;
    *) local text="$1"
  esac
  [ -z "$text" ] && local text="$color$2${code}0m"
  echo -e "$text"
}

do_delete_instance() {
    NGINX_AVAILABLE_PATH='/etc/nginx/sites-available'
    NGINX_ENABLE_PATH='/etc/nginx/sites-enabled'
    UWSGI_AVAILABLE_PATH='/etc/uwsgi/apps-available'
    UWSGI_ENABLE_PATH='/etc/uwsgi/apps-enabled'

    if [ ! -z '$CONFIG_PATH' ]; then
        CONFIG_PATH="/etc/ishtar/"
    fi

    if [ ! -f $CONFIG_PATH/config ]; then
        echo "";
        cecho r ""$CONFIG_PATH" is not a valid config file."
        echo "Have you properly install Ishtar sources?"
        echo "Run ishtar-install before this script.";
        echo "";
        exit 1;
    fi

    source $CONFIG_PATH/config

    INSTANCES_FILE=$CONFIG_PATH/instances
    if [ ! -f $INSTANCES_FILE ]; then
        echo "";
        cecho r "No instance installed. Exiting."
        echo "";
        exit 1;
    fi
    echo ""
    cecho g "*******************************************************************************"
    cecho g "++++++               Ishtar instance deletion script                     ++++++"
    cecho g "*******************************************************************************"
    echo ""
    cecho y "Available instances:"
    echo ""

    cat $INSTANCES_FILE

    to_delete=''
    echo ""
    while [ "$to_delete" == '' ]
    do
        read -p "* Which one would you like to delete? " choice
        GRP=`cat $INSTANCES_FILE | grep "^$choice$"`
        if [ "$GRP" != '' ]; then
            to_delete=$choice
        fi
    done
    echo ""
    cecho r "Are you really sure to delete configuration, database and media attached to the "
    cecho r "instance "$to_delete"?"
    echo ""
    read -p "* Type DELETE if you are sure: " choice
    if [ "$choice" != "DELETE" ]; then
        exit 1
    fi

    systemctl stop uwsgi
    systemctl stop monit || true
    INSTANCE=$to_delete
    rm -rf $ISHTAR_PATH/$INSTANCE
    rm -f "$NGINX_AVAILABLE_PATH/ishtar-$INSTANCE.conf"
    rm -f "$NGINX_ENABLE_PATH/ishtar-$INSTANCE.conf"
    rm -f "$UWSGI_AVAILABLE_PATH/ishtar-$INSTANCE.ini"
    rm -f "$UWSGI_ENABLE_PATH/ishtar-$INSTANCE.ini"
    rm -f "/etc/monit/conf-available/celery-$INSTANCE"
    rm -f "/etc/monit/conf-enabled/celery-$INSTANCE"
    systemctl start uwsgi || true
    systemctl start monit || true

    if [ $USE_CELERY = 'yes' ]; then
        /usr/bin/supervisorctl stop celery_$INSTANCE || (true && cecho r "/usr/bin/supervisorctl stop celery_$INSTANCE - failed")
        /usr/bin/supervisorctl remove celery_$INSTANCE || (true && cecho r "/usr/bin/supervisorctl remove celery_$INSTANCE - failed")
        /usr/sbin/rabbitmqctl delete_vhost /ishtar$INSTANCE || (true && cecho r "/usr/sbin/rabbitmqctl delete_vhost /ishtar$INSTANCE - failed")
        /usr/sbin/rabbitmqctl delete_user ishtar$INSTANCE || (true && cecho r "/usr/sbin/rabbitmqctl delete_user ishtar$INSTANCE - failed")
        /usr/bin/supervisorctl reload || (true && cecho r "/usr/bin/supervisorctl reload - failed")
    fi

    rm -f /etc/supervisor/conf.d/celery_$INSTANCE.conf

    DB_NAME="ishtar-$INSTANCE"
    export DB_NAME
    su postgres <<'EOF'
        cd $HOME
        dropdb "$DB_NAME" || (true && echo 'dropdb $DB_NAME - failed')
        dropuser "$DB_NAME" || (true && echo 'dropuser $DB_NAME - failed')
EOF


    sed '/'$to_delete'/d' $INSTANCES_FILE > /tmp/new_instances
    mv /tmp/new_instances $INSTANCES_FILE

    echo ""
    cecho g $to_delete" have been completely removed"
    echo ""
}

do_delete_instance
systemctl start uwsgi || true
systemctl start monit || true