#
# Cookbook:: esh_haproxy
# Recipe:: config
#
# Copyright:: 2022, 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.

apt_package %w(haproxy whois)

directory "/etc/haproxy/country" do
  owner 'root'
  group 'root'
  mode '0755'
  action :create
end

cookbook_file '/usr/local/bin/haproxy_country' do
  owner 'root'
  group 'root'
  mode '0755'
  action :create
end

execute 'haproxy generate country acl' do
  command '/usr/local/bin/haproxy_country'
  environment ({ 'LICENSE_KEY' => node['esh']['haproxy']['config']['maxmind_key'] })
  action :run
  not_if { ::File.exist?('/etc/haproxy/country/JP.txt') }
end

remote_file '/etc/haproxy/dhparam' do
  source 'https://raw.githubusercontent.com/internetstandards/dhe_groups/master/ffdhe4096.pem'
  owner 'root'
  group 'root'
  mode '0444'
  action :create
end

template '/etc/haproxy/haproxy.cfg' do
  owner 'root'
  group 'root'
  mode '0444'
  variables acls: node['esh']['haproxy']['config']['acls'],
    listen: node['esh']['haproxy']['config']['listen'],
    backends: node['esh']['haproxy']['config']['backends'],
    stats_password: node['esh']['haproxy']['config']['stats_password']
  action :create
end

systemd_unit 'haproxy_country_failure.service' do
  content <<~EOU
  [Unit]
  Description=Notifies HC if haproxy country fail
  
  [Service]
  Type=simple
  ExecStart=/usr/bin/curl -fsS -m 10 --retry 5 #{node['esh']['haproxy']['config']['hc_url']}/fail
  
  EOU
  verify false
  action [:create, :enable]
end

systemd_unit 'haproxy_country_success.service' do
  content <<~EOU
  [Unit]
  Description=Notifies HC if haproxy country succeed
  
  [Service]
  Type=simple
  ExecStart=/usr/bin/curl -fsS -m 10 --retry 5 #{node['esh']['haproxy']['config']['hc_url']}
  
  EOU
  verify false
  action [:create, :enable]
end

systemd_unit 'haproxy_country.service' do
  content <<~EOU
  [Unit]
  Description=Update haproxy country IP range
  OnFailure=haproxy_country_failure.service
  OnSuccess=haproxy_country_success.service

  [Service]
  Type=simple
  Environment="LICENSE_KEY=#{node['esh']['haproxy']['config']['maxmind_key']}"
  ExecStartPre=/usr/bin/curl -fsS -m 10 --retry 5 #{node['esh']['haproxy']['config']['hc_url']}/start
  ExecStart=/usr/local/bin/haproxy_country
  
  EOU
  verify false
  action [:create, :enable]
end

systemd_unit 'haproxy_country.timer' do
  content <<~EOU
  [Unit]
  Description=Run haproxy_country on Fridays, 12h random
  
  [Timer]
  OnCalendar=Fri 00:00
  RandomizedDelaySec=12h
  
  [Install]
  WantedBy=timers.target
  EOU
  verify false
  action [:create, :enable]
end

apt_package 'ssl-cert'

directory '/etc/haproxy/crt' do
  owner 'root'
  group 'root'
  mode '0755'
  action :create
end

execute 'add to haproxy default self-signed certificate' do
  command <<~EOT
    cat /etc/ssl/certs/ssl-cert-snakeoil.pem \
      /etc/ssl/private/ssl-cert-snakeoil.key \
      > /etc/haproxy/crt/ssl-cert-snakeoil.pem
  EOT
  not_if { ::File.exist?('/etc/haproxy/crt/ssl-cert-snakeoil.pem') }
  action :run
end

service 'haproxy' do
  action :nothing
  subscribes :reload, 'template[/etc/haproxy/haproxy.cfg]', :immediately
end