#!/bin/bash

echo "this script requires git"
yum install -y git 

echo "This script will download all Cacti dependecies and download the chosen cacti version from the cacti github"
echo "Dont forget to support cacti @ cacti.net!"

echo "set selinux to disabled"
setenforce 0 
sed -i 's/enforcing/disabled/g' /etc/selinux/config /etc/selinux/config

#Download chosen release
echo "here are some of the current cacti release versions \n
release/1.2.3
release/1.2.2
release/1.2.1
release/1.2.0
"

echo  "which release would you like to download ? Hit enter for latest"
read version

if  [ "$version" == "" ]
then
git clone https://github.com/Cacti/cacti.git

else 
yum install -y wget unzip
wget https://github.com/Cacti/cacti/archive/release/$version.zip
unzip $version 
mv cacti-release-$version cacti
fi

echo "will you be using the spine poller enter 1 for yes 2 for no"
read answer
if [ $answer == "1" ]
then
##Download packages needed for spine
yum install -y gcc mysql-devel net-snmp-devel autoconf automake libtool dos2unix help2man
echo "downloading and compling spine"
git clone https://github.com/Cacti/spine.git
cd spine
./bootstrap
./configure
make
make install
chown root:root /usr/local/spine/bin/spine
chmod u+s /usr/local/spine/bin/spine
cd ..

else
echo "spine dependecies  will not be installed"
fi

echo "On Centos systems we need to enable EPEL repos"
yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm -y
yum install yum-utils -y
yum-config-manager --enable remi-php72

echo "Downloading PHP modules needed for Cacti install"

yum install  -y rrdtool mariadb-server net-snmp-utils net-snmp  snmpd php php-mysql  php-snmp php-xml php-mbstring php-json php-gd php-gmp php-zip php-ldap php-mc php-posix 

###Start services 

systemctl enable httpd
systemctl enable mariadb
systemctl start mariadb
systemctl start httpd

####Open Port 80 and 443 on firewalld

echo "Open http and https ports on firewalld"
firewall-cmd --zone=public --add-port=80/tcp --permanent
firewall-cmd --zone=public --add-port=443/tcp --permanent
firewall-cmd --reload

##Timezone settings needed for cacti
echo "Enter your PHP time zone i.e America/Toronto  Default is US/Central "
read timezone
if [ $timezone == "" ] 
then

echo "date.timezone =" US/Central >> /etc/php.ini
else

echo "date.timezone =" $timezone >> /etc/php.ini

fi  

echo "Where would you like to install cacti default location is /var/www/html hit enter for default location"
read location
if [$location = ""]
then

location="/var/www/html"

mv cacti /var/www/html
else
mv cacti $location
fi

#Create cacti user and change permission of directory
echo "Which user would you like to run Cacti under (Default is www-data) hit enter for default"
read user
if [$user = ""]
then 
user="apache"
echo  "cacti will be run under apache"
chown -R  apache:apache $location/cacti
else 
useradd $user
chown -R $user:$user $location/cacti
fi

#assign permissions for cacti installation

chown -R apache:apache $location/cacti/resource/snmp_queries/          
chown -R apache:apache $location/cacti/resource/script_server/
chown -R apache:apache $location/cacti/resource/script_queries/
chown -R apache:apache $location/cacti/scripts/
chown -R apache:apache $location/cacti/cache/boost/
chown -R apache:apache $location/cacti/cache/mibcache/
chown -R apache:apache $location/cacti/cache/realtime/
chown -R apache:apache $location/cacti/cache/spikekill/
touch $location/cacti/log/cacti.log
chmod 777 $location/cacti/log/cacti.log
chown -R apache:apache   $location/cacti/log/
cp $location/cacti/include/config.php.dist $location/cacti/include/config.php

##Create database 
echo "would you like to customize the database name and user ? hit enter for defaults"
read customize

if [[ $customize = "" ]] 
then

mysql -uroot <<MYSQL_SCRIPT
CREATE DATABASE cacti DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci ;
GRANT ALL PRIVILEGES ON cacti.* TO 'cacti'@'localhost' IDENTIFIED BY 'cacti'; ;
GRANT SELECT ON mysql.time_zone_name TO cacti@localhost;
USE mysql;
ALTER DATABASE cacti CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
FLUSH PRIVILEGES;
MYSQL_SCRIPT

#pre populate cacti db
mysql -u root  cacti < $location/cacti/cacti.sql
mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root  mysql

sed -i -e 's@^$database_type.*@$database_type = "mysql";@g' /var/www/html/cacti/include/config.php
sed -i -e 's@^$database_default.*@$database_default = "cacti";@g' /var/www/html/cacti/include/config.php
sed -i -e 's@^$database_hostname.*@$database_hostname = "127.0.0.1";@g' /var/www/html/cacti/include/config.php
sed -i -e 's@^$database_username.*@$database_username = "cacti";@g' /var/www/html/cacti/include/config.php
sed -i -e 's@^$database_password.*@$database_password = "cacti";@g' /var/www/html/cacti/include/config.php
sed -i -e 's@^$database_port.*@$database_port = "3306";@g' /var/www/html/cacti/include/config.php
sed -i -e 's@^$database_ssl.*@$database_ssl = "false";@g' /var/www/html/cacti/include/config.php
sed -i -e 's@^//$url_path@$url_path@g' /var/www/html/cacti/include/config.php

echo "default database setup with following details"
echo "database name cacti\n
database username cacti\n
database password cacti"

else

echo "enter db name"
read customdbname
echo "enter db user"
read customdbuser
echo "enter db password"
read customdbpassword

mysql -u root <<MYSQL_SCRIPT
CREATE DATABASE $customdbname;
GRANT ALL PRIVILEGES ON $customdbname.* TO '$customdbuser'@'localhost' IDENTIFIED BY '$customdbpassword';
GRANT SELECT ON mysql.time_zone_name TO $customdbuser@localhost;
ALTER DATABASE $customdbname CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
FLUSH PRIVILEGES;
MYSQL_SCRIPT

echo "Pre-populating cacti DB"
mysql -u root  $customdbname < $location/cacti/cacti.sql
mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root  mysql

sed -i -e 's@^$database_type.*@$database_type = "mysql";@g' $location/cacti/include/config.php
sed -i -e 's@^$database_default.*@$database_default = '$customdbname'\;@g' $location/cacti/include/config.php
sed -i -e 's@^$database_hostname.*@$database_hostname = "127.0.0.1";@g' $location/cacti/include/config.php
sed -i -e 's@^$database_username.*@$database_username = '$customdbuser';@g' $location/cacti/include/config.php
sed -i -e 's@^$database_password.*@$database_password = '$customdbpassword';@g' $location/cacti/include/config.php
sed -i -e 's@^$database_port.*@$database_port = "3306";@g' "$location"/cacti/include/config.php
sed -i -e 's@^$database_ssl.*@$database_ssl = "false";@g' "$location"/cacti/include/config.php
sed -i -e 's@^//$url_path@$url_path@g' $location/cacti/include/config.php

fi

###Adding recomended PHP settings 
sed -e 's/max_execution_time = 30/max_execution_time = 60/' -i /etc/php.ini
sed -e 's/memory_limit = 128M/memory_limit = 400M/' -i /etc/php.ini

echo "Applying recommended DB settings"
echo "
innodb_file_format = Barracuda
character_set_client = utf8mb4
max_allowed_packet = 16777777
join_buffer_size = 32M
innodb_file_per_table = ON
innodb_large_prefix = 1
innodb_buffer_pool_size = 250M
innodb_additional_mem_pool_size = 90M
innodb_flush_log_at_trx_commit = 2
" >> /etc/my.cnf.d/server.cnf

echo "this script can download the following plugins monitor,thold would you like to install them  ?
type yes to download hit enter to skip"
read plugins
 if [ $plugins == "yes" ]
  then
   git clone https://github.com/Cacti/plugin_thold.git
    git clone https://github.com/Cacti/plugin_monitor.git
mv plugin_thold thold
  mv plugin_monitor monitor
   chown -R $user:$user thold
    chown -R $user:$user monitor
     mv thold $location/cacti/plugins
      mv monitor $location/cacti/plugins
else
 echo "plugins will not be installed"
fi

touch /etc/cron.d/$user
echo "*/5 * * * * $user php $location/cacti/poller.php > /dev/null 2>&1" > /etc/cron.d/$user 

echo "refreshing services"
systemctl restart httpd
systemctl restart mariadb

echo "Installation completed !"