#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

source ../settings/scripts/_common.sh
source /usr/share/yunohost/helpers

#=================================================
# MANAGE SCRIPT FAILURE
#=================================================

# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# LOAD SETTINGS
#=================================================
ynh_print_info "Loading settings..."

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get $app domain)
path_url=$(ynh_app_setting_get $app path)
final_path=$(ynh_app_setting_get $app final_path)
service_name=$(ynh_app_setting_get $app service_name)
service_checker_name=$service_name"-checker"

#=================================================
# CHECK IF THE APP CAN BE RESTORED
#=================================================
ynh_print_info "Validating restoration parameters..."

ynh_webpath_available $domain $path_url \
	|| ynh_die "Path not available: ${domain}${path_url}"
test ! -d $final_path \
	|| ynh_die "There is already a directory: $final_path "

#=================================================
# STANDARD RESTORATION STEPS
#=================================================
# RESTORE THE NGINX CONFIGURATION
#=================================================

ynh_restore_file "/etc/nginx/conf.d/$domain.d/$app.conf"

#=================================================
# RESTORE THE APP MAIN DIR
#=================================================
ynh_print_info "Restoring the app main directory..."

ynh_restore_file "$final_path"

ynh_restore_file "/etc/sudoers.d/${app}_ynh"

ynh_restore_file "/usr/local/bin/ipv6_expanded"
ynh_restore_file "/usr/local/bin/ipv6_compressed"
ynh_restore_file "/usr/local/bin/$service_checker-loadcubefile.sh"

ynh_restore_file "/etc/yunohost/hooks.d/post_iptable_rules/90-vpnclient"
ynh_restore_file "/etc/yunohost/hooks.d/90-vpnclient"

ynh_restore_file "/etc/openvpn/client.conf.tpl"
ynh_restore_file "/etc/openvpn/client.conf.tpl.restore"
ynh_restore_file "/etc/openvpn/keys/"

ynh_restore_file "/usr/local/bin/$service_checker"
ynh_restore_file "/usr/local/bin/$service_checker_name.sh"
ynh_restore_file "/usr/local/bin/$service_checker_name.timer"

#=================================================
# RECREATE THE DEDICATED USER
#=================================================
ynh_print_info "Recreating the dedicated system user..."

# Create the dedicated user (if not existing)
ynh_system_user_create $app

#=================================================
# RESTORE USER RIGHTS
#=================================================

# Restore permissions on app files
chown -R $app: $final_path

#=================================================
# RESTORE THE PHP-FPM CONFIGURATION
#=================================================

ynh_restore_file "/etc/php/7.0/fpm/pool.d/$app.conf"

#=================================================
# SPECIFIC RESTORATION
#=================================================
# REINSTALL DEPENDENCIES
#=================================================
ynh_print_info "Reinstalling dependencies..."

# Define and install dependencies
ynh_install_app_dependencies "$pkg_dependencies"

#=================================================
# RESTORE SYSTEMD
#=================================================
ynh_print_info "Restoring the systemd configuration..."

ynh_restore_file "/etc/systemd/system/$service_name.service"
ynh_restore_file "/etc/systemd/system/$service_checker_name.service"
ynh_restore_file "/etc/systemd/system/openvpn@.service"
systemctl enable "$service_name.service"
systemctl enable "$service_checker_name.service"
systemctl enable "openvpn@.service"

#=================================================
# ADVERTISE SERVICE IN ADMIN PANEL
#=================================================

yunohost service add $service_name --description "Tunnels the internet traffic through a VPN" --need_lock
yunohost service add $service_checker_name --description "Makes sure that the VPN service is running" --need_lock

#=================================================
# GENERIC FINALIZATION
#=================================================
# RELOAD NGINX AND PHP-FPM
#=================================================
ynh_print_info "Reloading nginx web server and php-fpm..."

systemctl restart php7.0-fpm
systemctl reload nginx

#=================================================
# END OF SCRIPT
#=================================================

ynh_print_info "Restoration completed for $app"