#!/bin/bash

##
# Copyright 2015 Telefónica Investigación y Desarrollo, S.A.U.
# This file is part of openvim
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
# For those usages not covered by the Apache License, Version 2.0 please
# contact with: nfvlabs@tid.es
##

#ONLY TESTED for Ubuntu 14.10 14.04 16.04, CentOS7 and RHEL7
#Get needed packages, source code and configure to run openvim
#Ask for database user and password if not provided


function usage(){
    echo -e "usage: sudo $0 [OPTIONS]"
    echo -e "Install last stable source code in ./openvim and the needed packages"
    echo -e "On a Ubuntu 16.04 it configures openvim as a service"
    echo -e "  OPTIONS"
    echo -e "     -u USER:    database admin user. 'root' by default. Prompts if needed"
    echo -e "     -p PASS:    database admin password to be used or installed. Prompts if needed"
    echo -e "     -q --quiet: install in an unattended mode"
    echo -e "     -h --help:  show this help"
    echo -e "     --develop:  install last version for developers, and do not configure as a service"
    echo -e "     --forcedb:  reinstall vim_db DB, deleting previous database if exists and creating a new one"
    echo -e "     --force:    makes idenpotent, delete previous installations folders if needed"
    echo -e "     --noclone:  assumes that openvim was cloned previously and that this script is run from the local repo"
    echo -e "     --no-install-packages: use this option to skip updating and installing the requires packages. This avoid wasting time if you are sure requires packages are present e.g. because of a previous installation"
}

function install_packages(){
    [ -x /usr/bin/apt-get ] && apt-get install -y $*
    [ -x /usr/bin/yum ]     && yum install -y $*   
    
    #check properly installed
    for PACKAGE in $*
    do
        PACKAGE_INSTALLED="no"
        [ -x /usr/bin/apt-get ] && dpkg -l $PACKAGE            &>> /dev/null && PACKAGE_INSTALLED="yes"
        [ -x /usr/bin/yum ]     && yum list installed $PACKAGE &>> /dev/null && PACKAGE_INSTALLED="yes" 
        if [ "$PACKAGE_INSTALLED" = "no" ]
        then
            echo "failed to install package '$PACKAGE'. Revise network connectivity and try again"
            exit -1
       fi
    done
}

function db_exists() {
    RESULT=`mysqlshow --defaults-extra-file="$2" | grep -v Wildcard | grep -o $1`
    if [ "$RESULT" == "$1" ]; then
        echo " DB $1 exists"
        return 0
    fi
    echo " DB $1 does not exist"
    return 1
}


GIT_URL=https://osm.etsi.org/gerrit/osm/openvim.git
DBUSER="root"
DBPASSWD=""
DBPASSWD_PARAM=""
QUIET_MODE=""
DEVELOP=""
FORCEDB=""
FORCE=""
NOCLONE=""
NO_PACKAGES=""
while getopts ":u:p:hiq-:" o; do
    case "${o}" in
        u)
            export DBUSER="$OPTARG"
            ;;
        p)
            export DBPASSWD="$OPTARG"
            export DBPASSWD_PARAM="-p$OPTARG"
            ;;
        q)
            export QUIET_MODE=yes
            export DEBIAN_FRONTEND=noninteractive
            ;;
        h)
            usage && exit 0
            ;;
        -)
            [ "${OPTARG}" == "help" ] && usage && exit 0
            [ "${OPTARG}" == "develop" ] && DEVELOP="y" && continue
            [ "${OPTARG}" == "forcedb" ] && FORCEDB="y" && continue
            [ "${OPTARG}" == "force" ]   && FORCEDB="y" && FORCE="y" && continue
            [ "${OPTARG}" == "noclone" ] && NOCLONE="y" && continue
            [ "${OPTARG}" == "quiet" ] && export QUIET_MODE=yes && export DEBIAN_FRONTEND=noninteractive && continue
            [ "${OPTARG}" == "no-install-packages" ] && export NO_PACKAGES=yes && continue
            echo -e "Invalid option: '--$OPTARG'\nTry $0 --help for more information" >&2
            exit 1
            ;;
        \?)
            echo -e "Invalid option: '-$OPTARG'\nTry $0 --help for more information" >&2
            exit 1
            ;;
        :)
            echo -e "Option '-$OPTARG' requires an argument\nTry $0 --help for more information" >&2
            exit 1
            ;;
        *)
            usage >&2
            exit -1
            ;;
    esac
done

#check root privileges and non a root user behind
[ "$USER" != "root" ] && echo "Needed root privileges" >&2 && exit -1
if [[ -z "$SUDO_USER" ]] || [[ "$SUDO_USER" = "root" ]]
then
    [[ -z $QUIET_MODE ]] && read -e -p "Install in the root user (y/N)?" KK
    [[ -z $QUIET_MODE ]] && [[ "$KK" != "y" ]] && [[ "$KK" != "yes" ]] && echo "Cancelled" && exit 1
    export SUDO_USER=root
fi

#Discover Linux distribution
#try redhat type
[ -f /etc/redhat-release ] && _DISTRO=$(cat /etc/redhat-release 2>/dev/null | cut  -d" " -f1) 
#if not assuming ubuntu type
[ -f /etc/redhat-release ] || _DISTRO=$(lsb_release -is  2>/dev/null)            
if [ "$_DISTRO" == "Ubuntu" ]
then
    _RELEASE=$(lsb_release -rs)
    if [[ ${_RELEASE%%.*} != 14 ]] && [[ ${_RELEASE%%.*} != 16 ]]
    then
        [[ -z $QUIET_MODE ]] && read -e -p "WARNING! Not tested Ubuntu version. Continue assuming a trusty (14.XX)'? (y/N)" KK
        [[ -z $QUIET_MODE ]] && [[ "$KK" != "y" ]] && [[ "$KK" != "yes" ]] && echo "Cancelled" && exit 1
        _RELEASE = 14
    fi
elif [ "$_DISTRO" == "CentOS" ]
then
    _RELEASE="7" 
    if ! cat /etc/redhat-release | grep -q "7."
    then
        read -e -p "WARNING! Not tested CentOS version. Continue assuming a '_RELEASE' type? (y/N)" KK
        [ "$KK" != "y" -a  "$KK" != "yes" ] && echo "Cancelled" && exit 0
    fi
elif [ "$_DISTRO" == "Red" ]
then
    _RELEASE="7" 
    if ! cat /etc/redhat-release | grep -q "7."
    then
        read -e -p "WARNING! Not tested Red Hat OS version. Continue assuming a '_RELEASE' type? (y/N)" KK
        [ "$KK" != "y" -a  "$KK" != "yes" ] && echo "Cancelled" && exit 0
    fi
else  #[ "$_DISTRO" != "Ubuntu" -a "$_DISTRO" != "CentOS" -a "$_DISTRO" != "Red" ] 
    _DISTRO_DISCOVER=$_DISTRO
    [ -x /usr/bin/apt-get ] && _DISTRO="Ubuntu" && _RELEASE="14"
    [ -x /usr/bin/yum ]     && _DISTRO="CentOS" && _RELEASE="7"
    read -e -p "WARNING! Not tested Linux distribution '$_DISTRO_DISCOVER '. Continue assuming a '$_DISTRO $_RELEASE' type? (y/N)" KK
    [ "$KK" != "y" -a  "$KK" != "yes" ] && echo "Cancelled" && exit 0
fi

#check if installed as a service
INSTALL_AS_A_SERVICE=""
[[ "$_DISTRO" == "Ubuntu" ]] &&  [[ ${_RELEASE%%.*} == 16 ]] && [[ -z $DEVELOP ]] && INSTALL_AS_A_SERVICE="y"

#Next operations require knowing BASEFOLDER
if [[ -z "$NOCLONE" ]]; then
    if [[ -n "$INSTALL_AS_A_SERVICE" ]] ; then
        OPENVIM_BASEFOLDER=__openvim__${RANDOM}
    else
        OPENVIM_BASEFOLDER="${PWD}/openvim"
    fi
    [[ -n "$FORCE" ]] && rm -rf $OPENVIM_BASEFOLDER #make idempotent
else
    HERE=$(realpath $(dirname $0))
    OPENVIM_BASEFOLDER=$(dirname $HERE)
fi


if [[ -z "$NO_PACKAGES" ]]
then
echo '
#################################################################
#####               UPDATE REPOSITORIES                     #####
#################################################################'
[ "$_DISTRO" == "Ubuntu" ] && apt-get update -y

[ "$_DISTRO" == "CentOS" -o "$_DISTRO" == "Red" ] && yum check-update -y
[ "$_DISTRO" == "CentOS" ] && sudo yum install -y epel-release
[ "$_DISTRO" == "Red" ] && wget http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm \
  && sudo rpm -ivh epel-release-7-5.noarch.rpm && sudo yum install -y epel-release && rm -f epel-release-7-5.noarch.rpm
[ "$_DISTRO" == "CentOS" -o "$_DISTRO" == "Red" ] && sudo yum repolist
fi

if [[ -z "$NO_PACKAGES" ]]
then
echo '
#################################################################
#####               INSTALL REQUIRED PACKAGES               #####
#################################################################'
[ "$_DISTRO" == "Ubuntu" ] && install_packages "git screen wget mysql-server"
[ "$_DISTRO" == "CentOS" -o "$_DISTRO" == "Red" ] && install_packages "git screen wget mariadb mariadb-server"

if [[ "$_DISTRO" == "Ubuntu" ]]
then
    #start services. By default CentOS does not start services
    service mysql start >> /dev/null
    # try to set admin password, ignore if fails
    [[ -n $DBPASSWD ]] && mysqladmin -u $DBUSER -s password $DBPASSWD
fi

if [ "$_DISTRO" == "CentOS" -o "$_DISTRO" == "Red" ]
then
    #start services. By default CentOS does not start services
    service mariadb start
    service httpd   start
    systemctl enable mariadb
    systemctl enable httpd
    read -e -p "Do you want to configure mariadb (recomended if not done before) (Y/n)" KK
    [ "$KK" != "n" -a  "$KK" != "no" ] && mysql_secure_installation

    read -e -p "Do you want to set firewall to grant web access port 80,443  (Y/n)" KK
    [ "$KK" != "n" -a  "$KK" != "no" ] && 
        firewall-cmd --permanent --zone=public --add-service=http &&
        firewall-cmd --permanent --zone=public --add-service=https &&
        firewall-cmd --reload
fi
fi  #[[ -z "$NO_PACKAGES" ]]

#check and ask for database user password. Must be done after database installation
if [[ -n $QUIET_MODE ]]
then
    echo -e "\nCheking database connection and ask for credentials"
    while ! mysqladmin -s -u$DBUSER $DBPASSWD_PARAM status >/dev/null
    do
        [ -n "$logintry" ] &&  echo -e "\nInvalid database credentials!!!. Try again (Ctrl+c to abort)"
        [ -z "$logintry" ] &&  echo -e "\nProvide database credentials"
        read -e -p "database user? ($DBUSER) " DBUSER_
        [ -n "$DBUSER_" ] && DBUSER=$DBUSER_
        read -e -s -p "database password? (Enter for not using password) " DBPASSWD_
        [ -n "$DBPASSWD_" ] && DBPASSWD="$DBPASSWD_" && DBPASSWD_PARAM="-p$DBPASSWD_"
        [ -z "$DBPASSWD_" ] && DBPASSWD=""           && DBPASSWD_PARAM=""
        logintry="yes"
    done
fi

if [[ -z "$NO_PACKAGES" ]]
then
echo '
#################################################################
#####               INSTALL PYTHON PACKAGES                 #####
#################################################################'
[ "$_DISTRO" == "Ubuntu" ] && install_packages "python-yaml python-libvirt python-bottle python-mysqldb python-jsonschema python-paramiko python-argcomplete python-requests"
[ "$_DISTRO" == "CentOS" -o "$_DISTRO" == "Red" ] && install_packages "PyYAML libvirt-python MySQL-python python-jsonschema python-paramiko python-argcomplete python-requests"

#The only way to install python-bottle on Centos7 is with easy_install or pip
[ "$_DISTRO" == "CentOS" -o "$_DISTRO" == "Red" ] && easy_install -U bottle

fi  #[[ -z "$NO_PACKAGES" ]]

if [[ -z $NOCLONE ]]; then
    echo '
#################################################################
#####                 DOWNLOAD SOURCE                       #####
#################################################################'
    if [[ -d "${OPENVIM_BASEFOLDER}" ]]
    then
        if [[ -n "$FORCE" ]]
        then
            echo "deleting '${OPENVIM_BASEFOLDER}' folder"
            rm -rf "$OPENVIM_BASEFOLDER" #make idempotent
        elif [[ -z "$QUIET_MODE" ]]
        then
            read -e -p "${OPENVIM_BASEFOLDER} folder exist, overwrite? (y/N)" KK
            if [[ "$KK" == "y" ]] || [[ "$KK" == "yes" ]]
                then rm -rf "$OPENVIM_BASEFOLDER"
            else
                echo "canceled"
                exit 1
            fi
        else
            echo "'${OPENVIM_BASEFOLDER}' folder exist" >&2 && exit 1
        fi
    fi


    su $SUDO_USER -c "git clone ${GIT_URL} ${OPENVIM_BASEFOLDER}"
    su $SUDO_USER -c "cp ${OPENVIM_BASEFOLDER}/.gitignore-common ${OPENVIM_BASEFOLDER}/.gitignore"
    [[ -z $DEVELOP ]] && su $SUDO_USER -c "git -C  ${OPENVIM_BASEFOLDER} checkout tags/v1.0.1"
fi

echo '
#################################################################
#####               CREATE DATABASE                         #####
#################################################################'
echo -e "\nCreating temporary file form MYSQL installation and initialization"
TEMPFILE="$(mktemp -q --tmpdir "installopenvim.XXXXXX")"
trap 'rm -f "$TEMPFILE"' EXIT
chmod 0600 "$TEMPFILE"
echo -e "[client]\n user='$DBUSER'\n password='$DBPASSWD'">"$TEMPFILE"

if db_exists "vim_db" $TEMPFILE ; then
    if [[ -n $FORCEDB ]]; then
        echo "   Deleting previous database vim_db"
        DBDELETEPARAM=""
        [[ -n $QUIET_MODE ]] && DBDELETEPARAM="-f"
        mysqladmin --defaults-extra-file=$TEMPFILE -s drop vim_db $DBDELETEPARAM || ! echo "Could not delete vim_db database" || exit 1
        #echo "REVOKE ALL PRIVILEGES ON vim_db.* FROM 'vim'@'localhost';" | mysql --defaults-extra-file=$TEMPFILE -s || ! echo "Failed while creating user vim at database" || exit 1
        #echo "DELETE USER 'vim'@'localhost';"   | mysql --defaults-extra-file=$TEMPFILE -s || ! echo "Failed while creating user vim at database" || exit 1
        mysqladmin --defaults-extra-file=$TEMPFILE -s create vim_db || ! echo "Error creating vim_db database" || exit 1
        echo "DROP USER 'vim'@'localhost';"   | mysql --defaults-extra-file=$TEMPFILE -s || ! echo "Failed while creating user vim at database" || exit 1
        echo "CREATE USER 'vim'@'localhost' identified by 'vimpw';"   | mysql --defaults-extra-file=$TEMPFILE -s || ! echo "Failed while creating user vim at database" || exit 1
        echo "GRANT ALL PRIVILEGES ON vim_db.* TO 'vim'@'localhost';" | mysql --defaults-extra-file=$TEMPFILE -s || ! echo "Failed while creating user vim at database" || exit 1
        echo " Database 'vim_db' created, user 'vim' password 'vimpw'"
    else
        echo "Database exists. Use option '--forcedb' to force the deletion of the existing one" && exit 1
    fi
else
    mysqladmin -u$DBUSER $DBPASSWD_PARAM -s create vim_db || ! echo "Error creating vim_db database" || exit 1
    echo "CREATE USER 'vim'@'localhost' identified by 'vimpw';"   | mysql --defaults-extra-file=$TEMPFILE -s || ! echo "Failed while creating user vim at database" || exit 1
    echo "GRANT ALL PRIVILEGES ON vim_db.* TO 'vim'@'localhost';" | mysql --defaults-extra-file=$TEMPFILE -s || ! echo "Failed while creating user vim at database" || exit 1
    echo " Database 'vim_db' created, user 'vim' password 'vimpw'"
fi

echo '
#################################################################
#####        INIT DATABASE                                  #####
#################################################################'
su $SUDO_USER -c "${OPENVIM_BASEFOLDER}/database_utils/init_vim_db.sh -u vim -p vimpw -d vim_db" || ! echo "Failed while initializing database" || exit 1


if [ "$_DISTRO" == "CentOS" -o "$_DISTRO" == "Red" ]
then
    echo '
#################################################################
#####        CONFIGURE firewalld                            #####
#################################################################'
    read -e -p "Configure firewalld for openvimd port 9080? (Y/n)" KK
    if [ "$KK" != "n" -a  "$KK" != "no" ]
    then
        #Creates a service file for openvim
        echo '<?xml version="1.0" encoding="utf-8"?>
<service>
 <short>openvimd</short>
 <description>openvimd service</description>
 <port protocol="tcp" port="9080"/>
</service>' > /etc/firewalld/services/openvimd.xml
        #put proper permissions
        pushd /etc/firewalld/services > /dev/null
        restorecon openvim
        chmod 640 openvim
        popd > /dev/null
        #Add the openvim service to the default zone permanently and reload the firewall configuration
        firewall-cmd --permanent --add-service=openvim > /dev/null
        firewall-cmd --reload > /dev/null
        echo "done." 
    else
        echo "skipping."
    fi
fi

echo '
#################################################################
#####        CONFIGURE openvim CLIENT                       #####
#################################################################'
#creates a link at ~/bin if not configured as a service
if [[ -z "$INSTALL_AS_A_SERVICE" ]]
then
    su $SUDO_USER -c 'mkdir -p ~/bin'
    su $SUDO_USER -c 'rm -f ${HOME}/bin/openvim'
    su $SUDO_USER -c 'rm -f ${HOME}/bin/openflow'
    su $SUDO_USER -c 'rm -f ${HOME}/bin/service-openvim'
    su $SUDO_USER -c 'rm -f ${HOME}/bin/initopenvim'
    su $SUDO_USER -c 'rm -f ${HOME}/bin/service-floodlight'
    su $SUDO_USER -c 'rm -f ${HOME}/bin/service-opendaylight'
    su $SUDO_USER -c 'rm -f ${HOME}/bin/get_dhcp_lease.sh'
    su $SUDO_USER -c "ln -s '${OPENVIM_BASEFOLDER}/openvim'   "'${HOME}/bin/openvim'
    su $SUDO_USER -c "ln -s '${OPENVIM_BASEFOLDER}/openflow'  "'${HOME}/bin/openflow'
    su $SUDO_USER -c "ln -s '${OPENVIM_BASEFOLDER}/scripts/service-openvim.sh'  "'${HOME}/bin/service-openvim'
    su $SUDO_USER -c "ln -s '${OPENVIM_BASEFOLDER}/scripts/initopenvim.sh'  "'${HOME}/bin/initopenvim'
    su $SUDO_USER -c "ln -s '${OPENVIM_BASEFOLDER}/scripts/service-floodlight.sh'  "'${HOME}/bin/service-floodlight'
    su $SUDO_USER -c "ln -s '${OPENVIM_BASEFOLDER}/scripts/service-opendaylight.sh'  "'${HOME}/bin/service-opendaylight'
    su $SUDO_USER -c "ln -s '${OPENVIM_BASEFOLDER}/scripts/get_dhcp_lease.sh'  "'${HOME}/bin/get_dhcp_lease.sh'
    
    #insert /home/<user>/bin in the PATH
    #skiped because normally this is done authomatically when ~/bin exist
    #if ! su $SUDO_USER -c 'echo $PATH' | grep -q "/home/${SUDO_USER}/bin"
    #then
    #    echo "    inserting /home/$SUDO_USER/bin in the PATH at .bashrc"
    #    su $SUDO_USER -c 'echo "PATH=\$PATH:/home/\${USER}/bin" >> ~/.bashrc'
    #fi
    
    if [[ $SUDO_USER == root ]]
    then
        if ! echo $PATH | grep -q "${HOME}/bin"
        then
            echo "PATH=\$PATH:\${HOME}/bin" >> ${HOME}/.bashrc
        fi
    fi
fi

#configure arg-autocomplete for this user
#in case of minmal instalation this package is not installed by default
[[ "$_DISTRO" == "CentOS" || "$_DISTRO" == "Red" ]] && yum install -y bash-completion
#su $SUDO_USER -c 'mkdir -p ~/.bash_completion.d'
su $SUDO_USER -c 'activate-global-python-argcomplete --user'
if ! grep -q bash_completion.d/python-argcomplete.sh ${HOME}/.bashrc
then
    echo "    inserting .bash_completion.d/python-argcomplete.sh execution at .bashrc"
    su $SUDO_USER -c 'echo ". ${HOME}/.bash_completion.d/python-argcomplete.sh" >> ~/.bashrc'
fi


if [[ -n "$INSTALL_AS_A_SERVICE"  ]]
then
echo '
#################################################################
#####             CONFIGURE OPENVIM SERVICE                 #####
#################################################################'

    ${OPENVIM_BASEFOLDER}/scripts/install-openvim-service.sh -f ${OPENVIM_BASEFOLDER} && `[[ -z "$NOCLONE" ]] && echo "-d"`
#    alias service-openvim="service openvim"
#    echo 'alias service-openvim="service openvim"' >> ${HOME}/.bashrc

    echo
    echo
    echo "Done!  installed at /opt/openvim"
    echo " Manage server with 'service openvim start|stop|status|...' "


else

    echo
    echo "Done!  you may need to logout and login again for loading client configuration"
    echo " Run 'service-openvim start' for starting openvim in a screen"

fi