#!/bin/bash
set -u

# THis script is a basic wordpress setup. It does
# - download  wordpress latest
# - download wp-cli.phar
# - install  wordpress with plugins / themes 
# - create a mysql database and user
# - create apache2 config ( nginx still needs implementation )
# - restarts apache2
# 
# The Wordpress Site is then available at localhost/YOUR_SITENAME 
# user: admin   pw: admin ( change !! )


if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 
   exit 1
fi

if [[ $# -eq 0 ]] ; then
    echo 'Site name required. Exiting ......'
    exit 1
fi

 
#
# Vars
# Edit according to your needs
#

# apache2 document root
document_root="/var/www/html/"
domain="localhost"
admin_email="mail@schubertdaniel.de"
site_name=$1


plugins="login-lockdown cachify"
themes=""


db_new_host="localhost"
db_new_name="wp_$site_name"
db_new_user=$db_new_name
db_new_pw=$(tr -cd '[:alnum:]' < /dev/urandom | fold -w8 | head -n1)

#
# Functions
#
check_service() {
  echo "Checking if $1 is running."
  systemctl is-active --quiet $1
  
  if [ $? -eq 0 ]; then
    echo "++ $1 is running. Good."
    echo
    return 0
  else 
    echo "-- $1 is not running."
    echo
    return 1
  fi
}


function install_wp {
  echo "Download wp-cli ....."
  curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar

  # bug when renaming wp-cli.phar on CentOs
  # https://github.com/wp-cli/config-command/issues/31
  
  # Are we on Debian?
  if [ -f /etc/release ]; then
    mv wp-cli.phar wp; chmod +x ./$cmd
    cmd="./wp"
  
  # Are we on RedHat / CentOS / Fedora?
  elif [ -f /etc/redhat-release ]; then
    chmod +x wp-cli.phar
    cmd="./wp-cli.phar"

  # dunno ....
  else
    chmod +x wp-cli.phar
    cmd="./wp-cli.phar"
  fi
  
  echo "Installing Wordpress with \"$cmd\" "
  $cmd core download --locale=de_DE --allow-root
  $cmd config create --dbname=$db_new_name --dbuser=$db_new_user --dbhost=$db_new_host --dbpass=$db_new_pw --skip-check --allow-root

  $cmd core install --url=$domain/$1 --title=$1 --admin_user=admin --admin_password=admin --admin_email=$admin_email --skip-email --allow-root

  if [ -n "${plugins+x}" ]; then 
    echo "installing Plugins $plugins"
    $cmd plugin install $plugins --allow-root
  fi

  if [ -n "${theme+x}" ]; then 
    echo "installing Theme:  $theme"
    $cmd theme install $theme --allow-root
  fi
}

configure_nginx() {
  # TODO : not implemented yet
  return 0
}

configure_apache2() {
  chown -R www-data. $document_root$site_name

cat > /etc/apache2/sites-available/$site_name.conf << EOL 
<VirtualHost *:80>
  DocumentRoot $document_root
  ServerName localhost
  Alias /$site_name $document_root$site_name
  DirectoryIndex index.php index.html
  <Directory $document_root$site_name/>
      AllowOverride All
      Require all granted
      Options -Indexes
  </Directory>
</VirtualHost>
EOL

  a2ensite $site_name.conf
  systemctl reload apache2
}

setup_db(){
  echo "Creating new database $db_new_name" 
  mysqladmin create $db_new_name

  mysql -e "CREATE USER '$db_new_user'@'localhost' IDENTIFIED BY '$db_new_pw';"
  mysql -e "GRANT ALL PRIVILEGES ON $db_new_name . * TO '$db_new_user'@'localhost';"
}


run(){
  mkdir $document_root$1
  cd $document_root$1

  echo "We have $2 running; Configuring it "

  setup_db 
  install_wp $1
  configure_$2
  
  echo "Finished. Exitinig now."
  exit
}

############################################
# script starts here:
#############################################


# Check for running database
check_service mysql
ret_mysql=$?

check_service mariadb 
ret_maria=$?

n=$(($ret_maria + $ret_mysql))
if [ n == 2 ]; then
  echo "No MySQL or MariaDB running. Exiting .."
  exit
fi

# check for running webserver
check_service nginx
if [ $? -eq 0 ]; then
  run $1 nginx
fi

check_service apache2
if [ $? -eq 0 ]; then
  run $1 apache2
fi

echo "Neither nginx nor apache2 found running."
echo "Continuing anyway, but you will have to configure your webserver manually to make this work."
exit