# frozen_string_literal: true

module Meroku
  # A node is an ec2 node, that powers meroku
  class Node
    include Meroku::Shared
    include Meroku::Aws
    attr_reader :instance_id, :connection

    def initialize
      make_instance && associate_address
      start_ssh && configure_keys
      install_packages
      database_inits && git_clone
      nginx_configs && start_rails && close_ssh
      puts 'Node created'
    end

    def execute_script(script)
      script.each_line do |line|
        puts line
        execute(line)
      end
    end

    def start_ssh
      @connection = Net::SSH.start(ip_address, 'ubuntu', sshopts)
    end

    def close_ssh
      @connection.close
    end

    def execute(command)
      @connection.exec(command) { |_ch, _stream, data| puts data }
      @connection.loop
    end

    private

    def sshopts
      {
        verify_host_key: false,
        key_data: Meroku::Shared.secrets.private_key
      }
    end

    def configure_keys
      execute_script <<~HEREDOC
        sudo curl -s -o /etc/ssh/ssh_host_ecdsa_key #{bucket}ssh_host_ecdsa_key
        sudo curl -s -o /etc/ssh/ssh_host_ecdsa_key.pub #{bucket}ssh_host_ecdsa_key.pub
        sudo service ssh restart
        curl -s -o /home/ubuntu/letsencrypt_fullchain.pem #{bucket}letsencrypt_fullchain.pem
        curl -s -o /home/ubuntu/letsencrypt_privkey.pem #{bucket}letsencrypt_privkey.pem
        curl -s https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
        echo "Dpkg::Use-Pty "0";" | sudo tee /etc/apt/apt.conf.d/00usepty
      HEREDOC
    end

    def install_packages
      ubuntu_site = 'http://archive.ubuntu.com/ubuntu/'
      postgres_site = 'http://apt.postgresql.org/pub/repos/apt/'
      execute_script <<~HEREDOC
        sudo apt-add-repository ppa:brightbox/ruby-ng --yes 2>/dev/null >/dev/null
        echo "deb #{ubuntu_site} trusty main universe" | sudo tee -a /etc/apt/sources.list
        echo "deb #{ubuntu_site} trusty-security main universe" | sudo tee -a /etc/apt/sources.list
        echo "deb #{ubuntu_site} trusty-updates main universe" | sudo tee -a /etc/apt/sources.list
        echo "deb #{postgres_site} trusty-pgdg main" | sudo tee -a /etc/apt/sources.list
        DEBIAN_FRONTEND=noninteractive sudo apt-get update -qq
        DEBIAN_FRONTEND=noninteractive sudo apt-get upgrade -yqq --force-yes 2>/dev/null >/dev/null
        DEBIAN_PRIORITY=critical DEBIAN_FRONTEND=noninteractive sudo apt-get install -q -y -o "Dpkg::Options::=--force-confdef" -o "Dpkg::Options::=--force-confold" autoconf bind9-host bison build-essential coreutils curl daemontools dnsutils ed git imagemagick iputils-tracepath language-pack-en libbz2-dev libcurl4-openssl-dev libev-dev libevent-dev libglib2.0-dev libjpeg-dev libmagickwand-dev libmysqlclient-dev libncurses5-dev librdkafka-dev libreadline6-dev libssl-dev libuv-dev libxml2-dev libxslt-dev netcat-openbsd openjdk-7-jdk openjdk-7-jre-headless openssh-client openssh-server python python-dev socat stunnel syslinux tar telnet zip zlib1g-dev ruby2.4 ruby2.4-dev nginx libsqlite3-dev nodejs libpq-dev postgresql-9.6 2>/dev/null >/dev/null
      HEREDOC
    end

    def database_inits
      execute_script <<~HEREDOC
        sudo -u postgres createuser -e meroku
        sudo -u postgres createdb meroku
        sudo -u postgres psql -c "ALTER ROLE meroku WITH PASSWORD '#{Meroku::Shared.secrets.meroku_secret}';"
        sudo perl -pi -e "s#local.*all.*all.*peer#local   all             all                                     md5#" /etc/postgresql/9.6/main/pg_hba.conf
        sudo service postgresql restart
      HEREDOC
    end

    def git_clone
      execute_script <<~HEREDOC
        cd ~ && git clone https://github.com/meroku/meroku
        cd ~ && git clone https://github.com/meroku/backend_api
      HEREDOC
    end

    def nginx_configs
      execute_script <<~HEREDOC
        sudo rm -f /etc/nginx/sites-enabled/* /etc/nginx/sites-available/*
        # Place vhost config for backend_api
        sudo cp ~/backend_api/config/etc_nginx_sites-enabled_default /etc/nginx/sites-enabled/default
        # Place vhost config template for end-user apps
        sudo mkdir /world_readable && sudo chmod 777 /world_readable
        sudo cp /home/ubuntu/meroku/data/etc_nginx_sites-enabled_template /world_readable
        sudo chmod a+r /world_readable/etc_nginx_sites-enabled_template
      HEREDOC
    end

    def start_rails
      execute_script <<~HEREDOC
        cd ~/backend_api; sudo gem install bundler; bundle;
        cd ~/backend_api; SECRET=#{Meroku::Shared.secrets.meroku_secret} RAILS_ENV=production bundle exec rake db:migrate db:seed
        cd ~/backend_api; SECRET=#{Meroku::Shared.secrets.meroku_secret} SECRET_KEY_BASE=#{Meroku::Shared.secrets.meroku_secret} RAILS_ENV=production bundle exec puma -d -b unix:///home/ubuntu/backend_api/tmp/backend_api.sock
        sudo /usr/sbin/nginx -s reload
      HEREDOC
    end
  end
end