#!/bin/bash

# Retrieve arguments
domain=${1}
url_path=${2}
server_name=${3}
crt_client_path=${4}
crt_client_key_path=${5}
crt_server_ca_path=${6}
login_user=${7}
login_passphrase=${8}

# Check arguments
# TODO

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

# Install packages
sudo apt-get --assume-yes --force-yes install openvpn php5-fpm

# Save arguments
sudo yunohost app setting vpnclient server_name -v "${server_name}"
sudo yunohost app setting vpnclient server_port -v 1194
sudo yunohost app setting vpnclient server_proto -v udp
sudo yunohost app setting vpnclient ip6_addr -v none
sudo yunohost app setting vpnclient ip6_net -v none
sudo yunohost app setting vpnclient login_user -v "${login_user}"
sudo yunohost app setting vpnclient login_passphrase -v "${login_passphrase}"

# Copy confs
sudo install -b -o root -g root -m 0644 ../conf/openvpn_client.conf.tpl /etc/openvpn/client.conf.tpl
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

# 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 {} \;

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

sudo install -b -o root -g admins -m 0660 "${crt_client_path}" /etc/openvpn/keys/user.crt
sudo install -b -o root -g admins -m 0660 "${crt_client_key_path}" /etc/openvpn/keys/user.key
sudo install -b -o root -g admins -m 0660 "${crt_server_ca_path}" /etc/openvpn/keys/ca-server.crt

sudo rm -f "${crt_client_path}" "${crt_client_key_path}" "${crt_server_ca_path}"

# Credentials file for (optional) login
sudo cat << EOF > /etc/openvpn/keys/credentials
${login_user}
${login_passphrase}
EOF

sudo chown -R root:admins /etc/openvpn/keys/credentials
sudo chmod 0460 /etc/openvpn/keys/credentials

# Create user for the web admin
sudo useradd -MUr vpnadmin

# 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
sudo sed 's|^;\?\s*max_execution_time.\+|max_execution_time = 600|' -i /etc/php5/fpm/php.ini

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

# Copy init script
sudo install -b -o root -g root -m 0755 ../conf/init_ynh-vpnclient /etc/init.d/ynh-vpnclient

# Set default inits
# The openvpn configuration is modified before the start, so the service is disabled by default
# and the ynh-vpnclient service handles it.
sudo service openvpn stop &> /dev/null
sudo yunohost service disable openvpn

sudo yunohost service add php5-fpm
sudo yunohost service enable php5-fpm
sudo yunohost service stop php5-fpm
sudo yunohost service start php5-fpm

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

sudo service nginx reload

# Update SSO for vpnadmin
sudo yunohost app ssowatconf

# Restart hotspot service if installed to change NAT configuration (now on tun0)
# A new start will fix the interface without unsetting all stuff
sudo yunohost app list -f hotspot --json | grep -q '"installed": true'
if [ $? -eq 0 ]; then
  sudo service ynh-hotspot start
fi

exit 0