#!/bin/bash

# VPN Client app for YunoHost 
# Copyright (C) 2015 Julien Vaubourg <julien@vaubourg.com>
# Contribute at https://github.com/labriqueinternet/vpnclient_ynh
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
# 
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# This is an upgrade?
upgrade=$([ "${VPNCLIENT_UPGRADE}" == 1 ] && echo true || echo false)

# Retrieve arguments
domain=${1}
url_path=${2}

if ! $upgrade; then
  source ./prerequisites
fi

# Check domain/path availability
sudo yunohost app checkurl ${domain}${url_path} -a vpnclient
if [ ! $? -eq 0 ]; then
  exit 1
fi

# Install packages
packages='php5-fpm sipcalc dnsutils openvpn curl'
export DEBIAN_FRONTEND=noninteractive

sudo apt-get --assume-yes --force-yes install ${packages}

if [ $? -ne 0 ]; then
  sudo apt-get update
  sudo apt-get --assume-yes --force-yes install ${packages}
fi

if ! $upgrade; then

  # Save arguments
  sudo yunohost app setting vpnclient service_enabled -v 0
  sudo yunohost app setting vpnclient server_name -v none
  sudo yunohost app setting vpnclient server_port -v 1194
  sudo yunohost app setting vpnclient server_proto -v udp
  sudo yunohost app setting vpnclient ip6_addr -v none
  sudo yunohost app setting vpnclient ip6_net -v none
  sudo yunohost app setting vpnclient login_user -v "${login_user}"
  sudo yunohost app setting vpnclient login_passphrase -v "${login_passphrase}"
  sudo yunohost app setting vpnclient dns0 -v 89.234.141.66
  sudo yunohost app setting vpnclient dns1 -v 2001:913::8

fi

# Install IPv6 scripts
sudo install -o root -g root -m 0755 ../conf/ipv6_expanded /usr/local/bin/
sudo install -o root -g root -m 0755 ../conf/ipv6_compressed /usr/local/bin/

# Install command-line cube file loader
sudo install -o root -g root -m 0755 ../conf/ynh-vpnclient-loadcubefile.sh /usr/local/bin/

# Copy confs
sudo mkdir -pm 0755 /var/log/nginx/
sudo chown root:admins /etc/openvpn/
sudo chmod 775 /etc/openvpn/
sudo mkdir -pm 0755 /etc/yunohost/hooks.d/post_iptable_rules/

sudo install -b -o root -g admins -m 0664 ../conf/openvpn_client.conf.tpl /etc/openvpn/client.conf.tpl
sudo install -o root -g root -m 0644 ../conf/openvpn_client.conf.tpl /etc/openvpn/client.conf.tpl.restore
sudo install -b -o root -g root -m 0644 ../conf/nginx_vpnadmin.conf "/etc/nginx/conf.d/${domain}.d/vpnadmin.conf"
sudo install -b -o root -g root -m 0644 ../conf/phpfpm_vpnadmin.conf /etc/php5/fpm/pool.d/vpnadmin.conf
sudo install -b -o root -g root -m 0755 ../conf/hook_post-iptable-rules /etc/yunohost/hooks.d/90-vpnclient.tpl
sudo install -b -o root -g root -m 0644 ../conf/openvpn@.service /etc/systemd/system/

# Copy web sources
sudo mkdir -pm 0755 /var/www/vpnadmin/
sudo cp -a ../sources/* /var/www/vpnadmin/

sudo chown -R root: /var/www/vpnadmin/
sudo chmod -R 0644 /var/www/vpnadmin/*
sudo find /var/www/vpnadmin/ -type d -exec chmod +x {} \;

# Create certificates directory
sudo mkdir -pm 0770 /etc/openvpn/keys/
sudo chown root:admins /etc/openvpn/keys/

# Fix confs
## nginx
sudo sed "s|<TPL:NGINX_LOCATION>|${url_path}|g" -i "/etc/nginx/conf.d/${domain}.d/vpnadmin.conf"
sudo sed 's|<TPL:NGINX_REALPATH>|/var/www/vpnadmin/|g' -i "/etc/nginx/conf.d/${domain}.d/vpnadmin.conf"
sudo sed 's|<TPL:PHP_NAME>|vpnadmin|g' -i "/etc/nginx/conf.d/${domain}.d/vpnadmin.conf"

## php-fpm
sudo sed 's|<TPL:PHP_NAME>|vpnadmin|g' -i /etc/php5/fpm/pool.d/vpnadmin.conf
sudo sed 's|<TPL:PHP_USER>|admin|g' -i /etc/php5/fpm/pool.d/vpnadmin.conf
sudo sed 's|<TPL:PHP_GROUP>|admins|g' -i /etc/php5/fpm/pool.d/vpnadmin.conf
sudo sed 's|<TPL:NGINX_REALPATH>|/var/www/vpnadmin/|g' -i /etc/php5/fpm/pool.d/vpnadmin.conf

# Fix sources
sudo sed "s|<TPL:NGINX_LOCATION>|${url_path}|g" -i /var/www/vpnadmin/config.php

# Copy init script
sudo install -o root -g root -m 0755 ../conf/ynh-vpnclient /usr/local/bin/
sudo install -o root -g root -m 0644 ../conf/ynh-vpnclient.service /etc/systemd/system/

# Copy checker timer
sudo install -o root -g root -m 0755 ../conf/ynh-vpnclient-checker.sh /usr/local/bin/
sudo install -o root -g root -m 0644 ../conf/ynh-vpnclient-checker.service /etc/systemd/system/
sudo install -o root -g root -m 0644 ../conf/ynh-vpnclient-checker.timer /etc/systemd/system/

# Set default inits
# The boot order of these services are important, so they are disabled by default
# and the ynh-vpnclient service handles them.
sudo systemctl disable openvpn
sudo systemctl stop openvpn

sudo systemctl enable php5-fpm
sudo systemctl restart php5-fpm

sudo systemctl reload nginx

sudo systemctl enable ynh-vpnclient
sudo yunohost service add ynh-vpnclient

sudo systemctl start ynh-vpnclient-checker.timer
sudo systemctl enable ynh-vpnclient-checker.timer

if ! $upgrade; then
  sudo systemctl start ynh-vpnclient

  # Check configuration consistency
  
  if [ -z "${crt_server_ca_path}" ]; then
    echo "WARNING: VPN Client is not started because you need to define a server CA through the web admin" >&2
  fi
  
  if [ -z "${crt_client_key_path}" -a -z "${login_user}" ]; then
    echo "WARNING: VPN Client is not started because you need either a client certificate, either a username (or both)" >&2
  fi
fi

sudo yunohost app ssowatconf

exit 0