require 'net/ssh'
require 'pathname'
require 'json'
namespace :create_site do
  desc "Change Site Server Name"
  task :change_site_server_name,[:id,:server_name,:port] => :environment do |task,args|
    begin
      @site_construct = SiteConstruct.find(args.id)
      site_server = @site_construct.site_server
      if !site_server.nil?
        @password = site_server.password
        update_infos("Starting change domain name and ports.")
        Net::SSH.start(site_server.ip , site_server.account , { password: site_server.password, port: site_server.port}) do |ssh|
          @site_construct.update(:domain_name=>args.server_name)
          if args.port.present?
            all_ports = args.port.split('////')
            @site_construct.update(:port=> all_ports )
          end
          change_construct_nginx(ssh,@site_construct)
          @site_construct.update(:status=>'finish')
        end
      end
    rescue => e
      update_infos(e.to_s)
      @site_construct.update(:status=>'error')
      puts [e,e.backtrace]
    end
  end
  def change_construct_nginx(ssh, site_construct, update_multithread=false)
    @is_multithread = update_multithread
    auto_update_infos("Reading setting file...")
    raw_content = exec_command_by_user(ssh, "cat #{site_construct.nginx_file}")
    nginx_file_content = site_construct.generate_nginx_text(raw_content)
    auto_update_infos("Writing via safe stream...")
    ssh.open_channel do |channel|
      channel.exec("sudo -S sh -c 'cat > #{site_construct.nginx_file}'") do |ch, success|  
      ch.on_extended_data do |c, type, data|
        if data =~ /password/i
          c.send_data("#{@password}\n")
        end
      end
      ch.send_data(nginx_file_content)    
        ch.eof! 
      end
    end
    ssh.loop
    exec_ssh_command_by_sudo(ssh, "service nginx restart")
    auto_update_infos("Finish!")
  end 

  def exec_command_by_user(session,command)
    output = session.exec!(command)
    return output[0...-1].gsub(/^\n[\n]+/,'')
  end
  def exec_ssh_command_by_sudo(session,command)
    output = session.exec!("echo '#{@password}' | sudo -S #{command}")
    if output.include?("sudo:") && output.include?("command not found")
      output = session.exec!(command)
    end
    return output.encode!("UTF-8", :invalid => :replace, :undef => :replace, :replace => '')
  end
end