require 'net/ssh'
require 'pathname'
require 'json'
namespace :create_site do
  desc "Change Site Cert"
  task :change_site_cert,[:id,:is_certbot,:id_is_server,:cert_id,:redirect_to_https,:exec_finish] => :environment do |task,args|
    begin
      site_server = nil
      site_constructs = []
      @is_multithread = false
      @thread = nil
      @default_cert = args.cert_id ? SiteCert.find(args.cert_id) : nil
      if args.id_is_server
        site_server = SiteServer.find(args.id)
        site_constructs = site_server.site_constructs.to_a
        @is_multithread = true
        Multithread.where(:key=>'batch_install_certs').each{|thread| thread.destroy if (thread.status["status"] == "error" || thread.status["status"] == "finish")}
        Multithread.where(:key=>'batch_install_certs').destroy
        @thread = Multithread.where(:key=>'batch_install_certs').first
        if @thread.nil?
          @thread = Multithread.create(:key=>'batch_install_certs',:status=>{"infos"=>[],"status"=>"execing"})
        else
          return false if @default_cert.nil?
        end
      else
        @site_construct = SiteConstruct.find(args.id)
        site_server = @site_construct.site_server
        @site_construct.update(:infos=>[],:status=>"changing")
        site_constructs << @site_construct
      end
      tmp_is_certbot = (args.is_certbot == "true")
      if !site_server.nil?
        @password = site_server.password
        Net::SSH.start(site_server.ip , site_server.account , password: site_server.password) do |ssh|
          redirect_to_https = args.redirect_to_https ? true : (@site_construct.redirect_to_https rescue false)
          if tmp_is_certbot || (@site_cert.is_certbot rescue false)
            domain_names = site_constructs.flat_map{|site_construct| site_construct.domain_name.strip.split(" ")}.select{|d| d.present? && d.match(/^[\d\.]+$/).nil?}
            domain_names = domain_names.select{|d| `dig #{d} +short`.split("\n").select{|s| s.strip == site_server.ip}.count != 0}
            if domain_names.count != 0
              certbot_path = exec_ssh_command_by_sudo_and_see_output(ssh,"bash -l -c 'which certbot certbot-auto'",false,true).strip.split("\n")[0]
              if certbot_path.present?
                auto_update_infos("Using certbot to update cert setting...")
                if site_constructs.count > 1
                  auto_update_infos("Generating single cert for multiple domain names...")
                end
                exec_ssh_command_by_sudo_and_see_output(ssh,"sudo -p 'sudo password:' #{certbot_path} --nginx #{domain_names.map{|d| "-d " + d}.join(" ")} -n --#{redirect_to_https ? 'redirect' : 'no-redirect'}  --expand",true,false)
                site_constructs.each do |site_construct|
                  @site_construct = site_construct
                  auto_update_infos("Checking cert for #{site_construct.site_name}...")
                  nginx_file = site_construct.nginx_file
                  nginx_file_content =  exec_ssh_command_by_sudo_and_see_output(ssh,"cat #{nginx_file}",false,true)
                  crt_file_path = nginx_file_content.match(/(?<=!#|^)\s*ssl_certificate\s+(.*)/)[1].split(';').first rescue ''
                  private_key_path = nginx_file_content.match(/(?<=!#|^)\s*ssl_certificate_key\s+(.*)/)[1].split(';').first rescue ''
                  site_cert = site_construct.site_cert
                  if crt_file_path.present? && private_key_path.present?
                    if site_cert.nil? || !site_cert.is_certbot
                      site_cert = SiteCert.where(:source_paths=>[crt_file_path,private_key_path]).first
                      site_cert = SiteCert.new if site_cert.nil?
                    end
                    if true #site_cert.source_paths.count == 0
                      site_cert["cert_file"] = File.basename(crt_file_path)
                      cert_file_store_path = site_cert.cert_file.file.file
                      crt_file_content = exec_ssh_command_by_sudo_and_see_output(ssh,"cat #{crt_file_path}",false).select{|s| s.present?}.join("\n").strip.split(/(\r\n|\n)/).select{|s| s.present?}.join("\n")
                      FileUtils.mkdir_p(File.dirname(cert_file_store_path)) unless Dir.exist?(File.dirname(cert_file_store_path))
                      File.open(site_cert.cert_file.file.file,'w+'){|f| f.write(crt_file_content)}
                      site_cert["private_key"] = File.basename(private_key_path)
                      private_key_store_path = site_cert.private_key.file.file
                      private_key_content = exec_ssh_command_by_sudo_and_see_output(ssh,"cat #{private_key_path}",false).select{|s| s.present?}.join("\n").strip.split(/(\r\n|\n)/).select{|s| s.present?}.join("\n")
                      FileUtils.mkdir_p(File.dirname(private_key_store_path)) unless Dir.exist?(File.dirname(private_key_path))
                      File.open(site_cert.private_key.file.file,'w+'){|f| f.write(private_key_content)}
                      site_cert.source_paths = [crt_file_path,private_key_path]
                      site_cert.is_certbot = private_key_path.include?("letsencrypt")
                      site_cert.save
                      site_construct.update(:site_cert=>site_cert)
                    end
                    all_ports = (site_construct.port + ["443"]).uniq
                    site_construct.update(:port=> all_ports, :status=>'finish' )
                    auto_update_infos("Finish installing cert with certbot in #{site_construct.site_name} !")
                  else
                    auto_update_infos("Certbot generate cert failed!")
                    auto_update_infos("Please check your domain dns setting(A record)!")
                    site_construct.update(:status=>"error")
                  end
                end
              else
                auto_update_infos("Please install certbot first!")
              end
            else
              auto_update_infos("Please set domain name first!")
            end
          else
            site_constructs.each do |site_construct|
              @site_cert = @default_cert || @site_construct.site_cert
              next if @site_cert.nil?
              is_certbot = tmp_is_certbot || (@site_cert.is_certbot rescue false)
              @site_construct = site_construct
              @site_cert.change_data
              if @site_cert.is_valid
                valid_domain_names = @site_cert.valid_domain_names(@site_construct.domain_name)
                next if valid_domain_names.count == 0
                if @default_cert
                  @site_construct.update(:site_cert=>@default_cert,:redirect_to_https=>redirect_to_https)
                end
                auto_update_infos("Copying Cert to #{@site_construct.server_type}...")
                auto_update_infos("Installing Cert on #{valid_domain_names.join(" , ")}")
                cert_file_content = [(@site_cert.cert_file.file.read.strip rescue ""),(@site_cert.ca_bundle.file.read.strip rescue "")].join("\n").strip
                private_key_content = @site_cert.private_key.file.read
                cert_file_store_path = @site_construct.cert_file_remote_store_path
                exec_ssh_command_by_sudo(ssh,"mkdir -p #{File.dirname(cert_file_store_path)}")
                exec_command_by_user(ssh,"x='#{cert_file_content}'; echo '#{@password}' | sudo -S sh -c \"echo '$x' > #{cert_file_store_path}\"")
                private_key_store_path = @site_construct.private_key_remote_store_path
                exec_ssh_command_by_sudo(ssh,"mkdir -p #{File.dirname(private_key_store_path)}")
                exec_command_by_user(ssh,"x='#{private_key_content}'; echo '#{@password}' | sudo -S sh -c \"echo '$x' > #{private_key_store_path}\"")
                auto_update_infos("Finish copy.")
                auto_update_infos("Setting Cert...")
                nginx_file_content = exec_command_by_user(ssh,"cat #{@site_construct.nginx_file}")
                all_ports = (@site_construct.port + ["443"]).uniq
                @site_construct.update(:port=> all_ports,:status=>'finish' )
                nginx_file_content = @site_construct.generate_nginx_text(nginx_file_content)
                cmd = "x='#{nginx_file_content.gsub(/'{1,3}/,"\"\'\"")}'; echo '#{@password}' | sudo -S sh -c \"echo '$x' > #{@site_construct.nginx_file}\""
                exec_command_by_user(ssh,cmd)
              end
            end
          end
          exec_ssh_command_by_sudo(ssh,"service nginx restart")
          if @default_cert.nil? || args.exec_finish
            auto_update_infos("Finish!")
            if @is_multithread
              @thread.update(:status=>@thread.status.merge({"status"=>"finish"}))
            else
              @site_construct.update(:status=>"finish")
            end
          end
        end
      else
        auto_update_infos("Cert not found!")
        @site_construct.update(:status=>"error")
      end
    rescue => e
      puts [e,e.backtrace]
      auto_update_infos(e.to_s)
      if @is_multithread
        @thread.update(:status=>@thread.status.merge({"status"=>"error"}))
      else
        @site_construct.update(:status=>"error")
      end
    end
  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
  def auto_update_infos(info)
    if @is_multithread
      update_thread_infos(info)
      if @site_construct
        update_infos(info)
      end
    else
      update_infos(info)
    end
  end
end