#
# Cookbook:: esh_adguard
# Recipe:: default
#
# Copyright:: 2023, https://easyself.host
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

group 'adguard' do
  system true
  action :create
end

user 'adguard' do
  comment 'adguard system user'
  gid 'adguard'
  home '/var/lib/adguard'
  manage_home true
  shell '/usr/bin/bash'
  system true
  action :create
end

directory '/etc/adguard' do
  owner 'adguard'
  group 'adguard'
  mode '0750'
  action :create
end

%w(/var/log/AdGuardHome.out /var/log/AdGuardHome.err).each do |log|
  file log do
    owner 'adguard'
    group 'adguard'
    mode '0640'
    action :create
  end
end

version = node['esh']['adguard']['version']
url = "https://github.com/AdguardTeam/AdGuardHome/releases/download/v#{version}/AdGuardHome_linux_amd64.tar.gz"

remote_file "adguard.#{version}.tar.gz" do
  source url
  path "#{Chef::Config[:file_cache_path]}/adguard.#{version}.tar.gz"
  notifies :run, 'execute[extract adguard]', :immediately
end
  
execute 'extract adguard' do
  command <<~EOT
  tar -zxvf \
    #{Chef::Config[:file_cache_path]}/adguard.#{version}.tar.gz \
    -C /var/lib/adguard \
    --strip-components=2 ./AdGuardHome
  chown -R adguard: /var/lib/adguard
  chmod 750 /var/lib/adguard/AdGuardHome
  EOT
  action :nothing
  notifies :restart, 'service[AdGuardHome]', :delayed
end

username = node['esh']['adguard']['cert_auth'].split(':')[0]
password = node['esh']['adguard']['cert_auth'].split(':')[1]
auth_string = Base64.strict_encode64("#{username}:#{password}")

remote_file '/etc/adguard/fullchain.pem' do
  source node['esh']['adguard']['cert_pub']
  headers({ 'Authorization' => "Basic #{auth_string}" })
  owner 'adguard'
  group 'adguard'
  mode '0400'
  action :create
end

remote_file '/etc/adguard/privkey.pem' do
  source node['esh']['adguard']['cert_priv']
  headers({ 'Authorization' => "Basic #{auth_string}" })
  owner 'adguard'
  group 'adguard'
  mode '0400'
  action :create
end

execute 'setcap AdGuardHome' do
  command "setcap 'CAP_NET_BIND_SERVICE=+eip CAP_NET_RAW=+eip' /var/lib/adguard/AdGuardHome"
  not_if 'getcap /var/lib/adguard/AdGuardHome | grep -q cap_net_bind_service,cap_net_raw=eip'
  action :run
end

execute 'adguard service' do
  command '/var/lib/adguard/AdGuardHome -s install'
  not_if { ::File.exist?('/etc/systemd/system/AdGuardHome.service') } 
  action :run
end

directory '/etc/systemd/system/AdGuardHome.service.d' do
  owner 'root'
  group 'root'
  mode '0755'
  action :create
end

file '/etc/systemd/system/AdGuardHome.service.d/override.conf' do
  content <<~EOT
  [Service]
  User=adguard
  Group=adguard
  EOT
  owner 'root'
  group 'root'
  mode '0644'
  action :create
  notifies :run, 'execute[systemctl daemon-reload]', :immediately
end

execute 'systemctl daemon-reload' do
  command 'systemctl daemon-reload'
  action :nothing
end

file '/var/lib/adguard/AdGuardHome.yaml' do
  content node['esh']['adguard']['config']
  owner 'adguard'
  group 'adguard'
  mode '0640'
  action :create
  notifies :restart, 'service[AdGuardHome]', :immediately
end

service 'AdGuardHome' do
  action :nothing
end