require 'net/ssh'
require 'pathname'
namespace :create_site do
  desc "Copy Site from another site"
  task :copy_site,[:ip, :server_port,:user,:password,:site_name,:domain_name,:port,:db_name,:path,:site_construct_id,:template_site_construct_id,:only_copy_installed_module] => :environment do |task,args|
    @password = args.password
    template_site = SiteConstruct.find(args.template_site_construct_id)
    if args.site_construct_id.blank?
      @site_construct = SiteConstruct.new
      @site_construct.server_type = (SiteServer.where(:ip=>args.ip).first.server_name rescue args.ip)
      @site_construct.site_name = args.site_name
      @site_construct.domain_name = args.domain_name
      @site_construct.db_name = args.db_name.gsub(" ","")
      @site_construct.port = args.port
      @site_construct.path = args.path
      @site_construct.school_name = args.site_name.split(/[-_]/)
      @site_construct.user_id = User.first.id.to_s
      @site_construct.save
    else
      @site_construct = SiteConstruct.find(args.site_construct_id)
    end
    begin
      org_creating = (@site_construct.status == "creating")
      @site_construct.update(:status=>"creating")
      @site_construct.update!(:infos=>[])
      begin 
        Net::SSH.start(args.ip , args.user , { password: @password, port: args.server_port}) do |ssh|
        end
      rescue Net::SSH::HostKeyMismatch
        system("ssh-keygen -f \"$HOME/.ssh/known_hosts\" -R #{args.ip}")
      rescue Errno::ENOTTY
        system("ssh-add \"$HOME/.ssh/id_rsa\"")
      end
      Net::SSH.start(args.ip , args.user , { password: @password, port: args.server_port}) do |ssh|
        update_infos("Setting nginx for #{args.site_name}")
        nginx_setting_texts = @site_construct.generate_nginx_text
        exec_ssh_command_by_sudo_for_copy(ssh,"touch /etc/nginx/orbit_sites/#{@site_construct.get_site_name}")
        exec_ssh_command_by_sudo_for_copy(ssh,"x='#{nginx_setting_texts.gsub(/'{1,3}/,"\"\'\"")}'; echo '#{@password}' | sudo -S sh -c \"echo '$x' >  /etc/nginx/orbit_sites/#{@site_construct.get_site_name}\"")
        update_infos("Restarting nginx")
        exec_ssh_command_by_sudo_for_copy(ssh,"sudo -p 'sudo password:' service nginx restart")
        update_infos("Finish restarting nginx")
        exec_ssh_command_by_sudo_for_copy(ssh,"mkdir -p #{args.path}")
        update_infos("Copying site's files for #{args.site_name}")
        exec_ssh_command_for_copy(ssh,"sudo -p 'sudo password:' apt-get install -y rsync")
        extra_exclude_path = ""
        if args.only_copy_installed_module == true || args.only_copy_installed_module == "true"
          extra_exclude_path = ",public/uploads/"
        end
        server = SiteServer.where(:server_name => template_site.server_type).first
        ls_out = exec_ssh_command_for_copy(ssh, "if [ ! -d \"#{@site_construct.full_site_path}/app\" ]; then echo 'No such file or directory: #{@site_construct.full_site_path}/app'; fi", false).join("\n")
        if ls_out.include?("No such file or directory") || org_creating
          if @site_construct.server_type == template_site.server_type
              exec_ssh_command_for_copy(ssh,"rsync -ar -e 'ssh -o \"StrictHostKeyChecking=no\" -p 22' --info=progress2 --no-inc-recursive --delete --exclude={tmp/cache/,tmp/unicorn.sock,tmp/pids/*#{extra_exclude_path}} #{template_site.path}/#{template_site.get_site_name}/ #{args.path}/#{@site_construct.get_site_name}/",true)
          else
              exec_ssh_command_for_copy(ssh,"sudo -p 'sudo password:' apt-get install -y sshpass")
              outputs = exec_ssh_command_for_copy(ssh,"sshpass -p \"#{server.password}\" rsync -ar -e 'ssh -o \"StrictHostKeyChecking=no\" -p 22' --info=progress2 --no-inc-recursive --delete --exclude={tmp/cache/,tmp/unicorn.sock,tmp/pids/*#{extra_exclude_path}} #{server.account}@#{server.ip}:#{template_site.path}/#{template_site.get_site_name}/ #{args.path}/#{@site_construct.get_site_name}/",true)
              if outputs.join("\n").include?("Host key verification failed")
                  exec_ssh_command_by_sudo_for_copy(ssh,"ssh-keygen -f \"$HOME/.ssh/known_hosts\" -R #{server.ip}")
                  exec_ssh_command_by_sudo_for_copy(ssh,"ssh-keyscan -H #{server.ip} >> ~/.ssh/known_hosts")
                  exec_ssh_command_for_copy(ssh,"sshpass -p \"#{server.password}\" rsync -ar --info=progress2 --no-inc-recursive --delete --exclude={tmp/cache/,tmp/unicorn.sock,tmp/pids/*#{extra_exclude_path}} #{server.account}@#{server.ip}:#{template_site.path}/#{template_site.get_site_name}/ #{args.path}/#{@site_construct.get_site_name}/",true)
              end
          end
        end
        update_infos("Finish copying site's files for #{args.site_name}!")
        exec_ssh_command_by_sudo_for_copy(ssh,"sudo -p 'sudo password:' chown #{args.user}:#{args.user} #{args.path}/#{@site_construct.get_site_name} -R")
        exec_ssh_command_by_sudo_for_copy(ssh,"sudo -p 'sudo password:' chmod 777 #{args.path}/#{@site_construct.get_site_name} -R")
        db_setting_text = ssh.exec!("cat #{args.path}/#{args.site_name}/config/mongoid.yml")
        update_infos("Setting dbname to #{args.db_name}")
        exec_ssh_command_by_sudo_for_copy(ssh,"sh -c \"echo '#{db_setting_text.gsub(/database: .+/,"database: "+args.db_name)}' > #{args.path}/#{@site_construct.get_site_name}/config/mongoid.yml\"",true)
        unless args.only_copy_installed_module == true || args.only_copy_installed_module == "true"
          update_infos("Copying db from #{template_site.db_name} to #{args.db_name}")
          if @site_construct.server_type == template_site.server_type
              exec_ssh_command_by_sudo_for_copy(ssh,"mongodump -d #{template_site.db_name} -o #{args.path}/#{@site_construct.get_site_name}/dump_xxxx")
              exec_ssh_command_by_sudo_for_copy(ssh,"mongorestore --drop -d #{args.db_name} #{args.path}/#{@site_construct.get_site_name}/dump_xxxx/#{template_site.db_name}")
              exec_ssh_command_by_sudo_for_copy(ssh,"rm -rf #{args.path}/#{@site_construct.get_site_name}/dump_xxxx")
          else
              exec_ssh_command_by_sudo_for_copy(ssh,"sshpass -p '#{server.password}' ssh #{server.account}@#{server.ip} 'mongodump -d #{template_site.db_name} -o #{template_site.path}/#{template_site.site_name}/dump_xxxx'")
              exec_ssh_command_for_copy(ssh,"sshpass -p \"#{server.password}\" rsync -ar --info=progress2 --no-inc-recursive --delete #{server.account}@#{server.ip}:#{template_site.path}/#{template_site.get_site_name}/dump_xxxx/ #{args.path}/#{args.site_name}/dump_xxxx/")
              exec_ssh_command_by_sudo_for_copy(ssh,"mongorestore --drop -d #{args.db_name} #{args.path}/#{@site_construct.get_site_name}/dump_xxxx/#{template_site.db_name}")
              exec_ssh_command_by_sudo_for_copy(ssh,"rm -rf #{args.path}/#{@site_construct.get_site_name}/dump_xxxx")
              exec_ssh_command_by_sudo_for_copy(ssh,"sshpass -p '#{server.password}' ssh #{server.account}@#{server.ip} 'rm -rf #{template_site.path}/#{template_site.get_site_name}/dump_xxxx'")
          end
          update_infos("Finish copying database!")
        end
        update_infos("Checking extensions!")
        extensions = ["downloaded_extensions.rb","built_in_extensions.rb"]
        extensions.each do |extension_file|
            outputs = exec_ssh_command_by_sudo_for_copy(ssh,"cat #{args.path}/#{@site_construct.get_site_name}/#{extension_file}")
            next if outputs.blank?
            if !outputs.include?("No such file or directory")
                read_lines = outputs.split("\n").map{|l| l.split('#').first}
                include_path_lines = read_lines.select{|l| (l.include?("path") rescue false)}
                include_path_lines.each do |line|
                    path = line.split(/[:>]/).last.gsub(/[\'\"]/,"").strip
                    absolute_path = (path[0] == "/") ? path : ("#{template_site.path}/#{template_site.get_site_name}/#{path}")
                    absolute_path = (absolute_path[-1] == "/") ? absolute_path : (absolute_path + "/")
                    if @site_construct.server_type == template_site.server_type
                        exec_ssh_command_for_copy(ssh,"rsync -ar --info=progress2 --no-inc-recursive --delete #{absolute_path} #{args.path}/#{args.site_name}/#{Pathname.new(absolute_path).basename}/")
                    else
                        server = SiteServer.where(:server_name => template_site.server_type).first
                        exec_ssh_command_for_copy(ssh,"sshpass -p \"#{server.password}\" rsync -ar --info=progress2 --no-inc-recursive --delete #{server.account}@#{server.ip}:#{absolute_path} #{args.path}/#{args.site_name}/#{Pathname.new(absolute_path).basename}/")
                    end
                    outputs = outputs.gsub(path,"#{args.path}/#{args.site_name}/#{Pathname.new(absolute_path).basename}/")
                end
                if include_path_lines.count != 0
                    exec_ssh_command_by_sudo_for_copy(ssh,"sh -c \"echo '#{outputs.gsub("\"","\\\"").gsub("'","\\\"")}' > #{args.path}/#{@site_construct.get_site_name}/#{extension_file}\"")
                end
            end
        end
        update_infos("Finish checking extensions!")

        update_infos("Execing bundle install...")
        exec_ssh_command_by_sudo_for_copy(ssh,"bash -l -c 'cd #{args.path}/#{@site_construct.get_site_name}\nrm -f Gemfile.lock tmp/unicorn_rails.sock tmp/unicorn_roda.sock tmp/unicorn.sock\nbundle install'",true)
        exec_ssh_command_by_sudo_for_copy(ssh,"bash -l -c 'cd #{args.path}/#{@site_construct.get_site_name}\nrm -f Gemfile.lock tmp/unicorn_rails.sock tmp/unicorn_roda.sock tmp/unicorn.sock\nbundle install'")
        update_infos("Finish execing bundle install")
        update_infos("Starting #{args.site_name} web server to development")
        outputs = exec_ssh_command_by_sudo_for_copy(ssh,"bash -l -c 'cd #{args.path}/#{@site_construct.get_site_name}\nkill -s TERM `fuser tmp/unicorn.sock`\nsudo -p \"sudo password:\" kill -s TERM `sudo -p \"sudo password:\" fuser tmp/unicorn.sock`\nsudo -p \"sudo password:\" rm -f tmp/pids/unicorn.pid\nbundle exec unicorn_rails -c config/unicorn.rb -D -E development\n'")
        if (outputs.include? "not writable" rescue false)
            exec_ssh_command_by_sudo_for_copy(ssh,"sudo -p 'sudo password:' chown #{args.user}:#{args.user} #{args.path}/#{@site_construct.get_site_name} -R")
            exec_ssh_command_by_sudo_for_copy(ssh,"sudo -p 'sudo password:' chmod 777 #{args.path}/#{@site_construct.get_site_name} -R")
        end
        update_infos("Finish creating #{args.site_name}")
        exec_ssh_command_by_sudo_for_copy(ssh,"chmod 777 #{args.path}/#{@site_construct.get_site_name} -R")
        @site_construct.update(:status =>"finish")
        puts "finish creating #{args.site_name} on #{args.ip}"
      end
    rescue =>e
      @site_construct.update(:status =>"error",:infos=>@site_construct.infos.push("#{e}"))
    end
  end
  def exec_ssh_command_by_sudo(session,command)
    output = session.exec!("echo '#{@password}' | sudo -S #{command}")
    # output = session.exec!("echo '#{@password}' | sudo -S -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 exec_ssh_command_for_copy(session,command,update_outputs=false)
    outputs = []
    if update_outputs
      update_infos_for_exec("")
    end
    session.open_channel do |channel|
      channel.request_pty do |channel, success|
        channel.exec("LANG=en.UTF8 && #{command}") do |ch, success|
          abort "could not execute command: #{command}" unless success
          channel.on_data do |ch, data|
            data_str = data.to_s
            data_str.encode!("UTF-8", :invalid => :replace, :undef => :replace, :replace => '')
            if data_str.include?("sudo password:") || data_str.include?("Password:")
              channel.send_data "#{@password}\n"
            else
              print data_str unless @no_stdout
              data_str.gsub!("\r\n", "\n")
              rm_idx = data_str.index("\r")
              if rm_idx.nil?
                @remove_last_line = false
              else
                @remove_last_line = (outputs.count > 0 && data_str[0...rm_idx].exclude?("\n"))
              end
              data_str.gsub!(/.*\r/, '')
              next if data_str.length == 0
              if data_str.include?("\n") || outputs.empty?
                output_lines = data_str.split("\n")
                first_output = output_lines[0]
                if first_output
                  if @remove_last_line
                    outputs = outputs[1..-1]
                    outputs = [] if outputs.nil?
                  end
                  if outputs.count != 0
                    outputs[-1] += first_output
                  else
                    outputs << first_output
                  end
                end
                new_arr = output_lines[1..-1]
                new_arr = [] if new_arr.nil?
                if data_str[-1] == "\n"
                  new_arr << ""
                end
                outputs += new_arr
                if update_outputs
                  if first_output
                    update_infos_for_exec(first_output,true)
                  end
                  update_infos_for_exec(new_arr,false,true)
                end
              else
                if @remove_last_line
                  outputs = outputs[1..-1]
                  outputs = [] if outputs.nil?
                end
                if outputs.count == 0
                  outputs.push(data_str)
                else
                  outputs[-1] += (data_str rescue "")
                end
                if update_outputs
                  update_infos_for_exec(data_str,true)
                end
              end
            end
          end
        end
      end
    end
    session.loop
    return outputs
  end
  def exec_ssh_command_by_sudo_for_copy(session,command,update=false)
    outputs = exec_ssh_command_for_copy(session,command,update)
    tmp = outputs.join("\n")
    if outputs.join("\n").include?("Permission denied") || outputs.join("\n").include?("Operation not permitted")
      outputs = exec_ssh_command_for_copy(session,"sudo -p 'sudo password:' #{command}",update)
      tmp = outputs.join("\n")
    end
    return tmp
  end
  def update_infos_for_exec(info,update_last=false,update_array=false)
    return if @site_construct.nil?
    if update_last && !@site_construct.infos.empty?
      if @remove_last_line
        @site_construct.infos[-1] = info.to_s
      else
        @site_construct.infos[-1] += info.to_s
      end
    else
      if @remove_last_line
        @site_construct.infos = @site_construct.infos[0...-1]
      end
      if update_array
        @site_construct.infos += info
      else
        @site_construct.infos.push(info.to_s)
      end
    end
    @site_construct.save!
    return @site_construct.infos
  end
  def update_infos(info)
    puts info
    @site_construct.infos = @site_construct.infos.push(info)
    @site_construct.save!
    return @site_construct.infos
  end
end