require 'tempfile'

require "vagrant/util/template_renderer"

require_relative "../installer"

module VagrantPlugins
  module Chef
    module Provisioner
      # This class is a base class where the common functionality shared between
      # chef-solo and chef-client provisioning are stored. This is **not an actual
      # provisioner**. Instead, {ChefSolo} or {ChefServer} should be used.
      class Base < Vagrant.plugin("2", :provisioner)
        class ChefError < Vagrant::Errors::VagrantError
          error_namespace("vagrant.provisioners.chef")
        end

        def initialize(machine, config)
          super

          @logger = Log4r::Logger.new("vagrant::provisioners::chef")
        end

        def install_chef
          return if !config.install

          @logger.info("Checking for Chef installation...")
          installer = Installer.new(@machine,
            force:      config.install == :force,
            version:    config.version,
            prerelease: config.prerelease,
          )
          installer.ensure_installed
        end

        def verify_binary(binary)
          # Checks for the existence of chef binary and error if it
          # doesn't exist.
          @machine.communicate.sudo(
            "which #{binary}",
            error_class: ChefError,
            error_key: :chef_not_detected,
            binary: binary,
          )
        end

        # This returns the command to run Chef for the given client
        # type.
        def build_command(client)
          builder = CommandBuilder.new(@config, client, windows?, @machine.env.ui.is_a?(Vagrant::UI::Colored))
          return builder.build_command
        end

        # Returns the path to the Chef binary, taking into account the
        # `binary_path` configuration option.
        def chef_binary_path(binary)
          return binary if !@config.binary_path
          return File.join(@config.binary_path, binary)
        end

        def chown_provisioning_folder
          paths = [@config.provisioning_path,
                   @config.file_backup_path,
                   @config.file_cache_path]

          @machine.communicate.tap do |comm|
            paths.each do |path|
              comm.sudo("mkdir -p #{path}")
              comm.sudo("chown -h #{@machine.ssh_info[:username]} #{path}")
            end
          end
        end

        def setup_config(template, filename, template_vars)
          # If we have custom configuration, upload it
          remote_custom_config_path = nil
          if @config.custom_config_path
            expanded = File.expand_path(
              @config.custom_config_path, @machine.env.root_path)
            remote_custom_config_path = File.join(
              config.provisioning_path, "custom-config.rb")

            @machine.communicate.upload(expanded, remote_custom_config_path)
          end

          config_file = Vagrant::Util::TemplateRenderer.render(template, {
            custom_configuration: remote_custom_config_path,
            encrypted_data_bag_secret: guest_encrypted_data_bag_secret_key_path,
            environment:      @config.environment,
            file_cache_path:  @config.file_cache_path,
            file_backup_path: @config.file_backup_path,
            log_level:        @config.log_level.to_sym,
            node_name:        @config.node_name,
            verbose_logging:  @config.verbose_logging,
            http_proxy:       @config.http_proxy,
            http_proxy_user:  @config.http_proxy_user,
            http_proxy_pass:  @config.http_proxy_pass,
            https_proxy:      @config.https_proxy,
            https_proxy_user: @config.https_proxy_user,
            https_proxy_pass: @config.https_proxy_pass,
            no_proxy:         @config.no_proxy,
            formatter:        @config.formatter
          }.merge(template_vars))

          # Create a temporary file to store the data so we
          # can upload it
          temp = Tempfile.new("vagrant")
          temp.write(config_file)
          temp.close

          remote_file = File.join(config.provisioning_path, filename)
          @machine.communicate.tap do |comm|
            comm.sudo("rm -f #{remote_file}", error_check: false)
            comm.upload(temp.path, remote_file)
          end
        end

        def setup_json
          @machine.env.ui.info I18n.t("vagrant.provisioners.chef.json")

          # Get the JSON that we're going to expose to Chef
          json = @config.json
          json[:run_list] = @config.run_list if !@config.run_list.empty?
          json = JSON.pretty_generate(json)

          # Create a temporary file to store the data so we
          # can upload it
          temp = Tempfile.new("vagrant")
          temp.write(json)
          temp.close

          remote_file = File.join(@config.provisioning_path, "dna.json")
          @machine.communicate.tap do |comm|
            comm.sudo("rm -f #{remote_file}", error_check: false)
            comm.upload(temp.path, remote_file)
          end
        end

        def upload_encrypted_data_bag_secret
          remote_file = guest_encrypted_data_bag_secret_key_path
          return if !remote_file

          @machine.env.ui.info I18n.t(
            "vagrant.provisioners.chef.upload_encrypted_data_bag_secret_key")

          @machine.communicate.tap do |comm|
            comm.sudo("rm -f #{remote_file}", error_check: false)
            comm.upload(encrypted_data_bag_secret_key_path, remote_file)
          end
        end

        def delete_encrypted_data_bag_secret
          remote_file = guest_encrypted_data_bag_secret_key_path
          if remote_file
            @machine.communicate.sudo("rm -f #{remote_file}", error_check: false)
          end
        end

        def encrypted_data_bag_secret_key_path
          File.expand_path(@config.encrypted_data_bag_secret_key_path,
            @machine.env.root_path)
        end

        def guest_encrypted_data_bag_secret_key_path
          if @config.encrypted_data_bag_secret_key_path
            File.join(@config.provisioning_path, "encrypted_data_bag_secret_key")
          end
        end

        def windows?
          @machine.config.vm.communicator == :winrm
        end
      end
    end
  end
end