#
# Author:: Doug Ireton (<doug@1strategy.com>)
# Copyright:: 2012-2018, Nordstrom, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# See here for more info:
# http://msdn.microsoft.com/en-us/library/windows/desktop/aa394492(v=vs.85).aspx

require_relative "../resource"

class Chef
  class Resource
    class WindowsPrinter < Chef::Resource
      unified_mode true

      autoload :Resolv, "resolv"

      provides(:windows_printer) { true }

      description "Use the **windows_printer** resource to setup Windows printers. Note that this doesn't currently install a printer driver. You must already have the driver installed on the system."
      introduced "14.0"
      examples <<~DOC
      **Create a printer**:

      ```ruby
      windows_printer 'HP LaserJet 5th Floor' do
        driver_name 'HP LaserJet 4100 Series PCL6'
        ipv4_address '10.4.64.38'
      end
      ```

      **Delete a printer**:

      Note: this doesn't delete the associated printer port. See windows_printer_port above for how to delete the port.

      ```ruby
      windows_printer 'HP LaserJet 5th Floor' do
        action :delete
      end
      ```
      DOC

      property :device_id, String,
        description: "An optional property to set the printer queue name if it differs from the resource block's name. Example: `HP LJ 5200 in fifth floor copy room`.",
        name_property: true

      property :comment, String,
        description: "Optional descriptor for the printer queue."

      property :default, [TrueClass, FalseClass],
        description: "Determines whether or not this should be the system's default printer.",
        default: false

      property :driver_name, String,
        description: "The exact name of printer driver installed on the system.",
        required: [:create]

      property :location, String,
        description: "Printer location, such as `Fifth floor copy room`."

      property :shared, [TrueClass, FalseClass],
        description: "Determines whether or not the printer is shared.",
        default: false

      property :share_name, String,
        description: "The name used to identify the shared printer."

      property :ipv4_address, String,
        description: "The IPv4 address of the printer, such as `10.4.64.23`",
        callbacks: {
          "The ipv4_address property must be in the IPv4 format of `WWW.XXX.YYY.ZZZ`" =>
            proc { |v| v.match(Resolv::IPv4::Regex) },
        }

      PRINTERS_REG_KEY = 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Print\Printers\\'.freeze unless defined?(PRINTERS_REG_KEY)

      # @todo Set @current_resource printer properties from registry
      load_current_value do |desired|
        name desired.name
      end

      action :create do
        description "Create a new printer and a printer port if one doesn't already exist."

        if printer_exists?
          Chef::Log.info "#{@new_resource} already exists - nothing to do."
        else
          converge_by("Create #{@new_resource}") do
            create_printer
          end
        end
      end

      action :delete do
        description "Delete an existing printer. Note this does not delete the associated printer port."

        if printer_exists?
          converge_by("Delete #{@new_resource}") do
            delete_printer
          end
        else
          Chef::Log.info "#{@current_resource} doesn't exist - can't delete."
        end
      end

      action_class do
        private

        # does the printer exist
        #
        # @param [String] name the name of the printer
        # @return [Boolean]
        def printer_exists?
          printer_reg_key = PRINTERS_REG_KEY + new_resource.name
          logger.trace "Checking to see if this reg key exists: '#{printer_reg_key}'"
          registry_key_exists?(printer_reg_key)
        end

        # creates the printer port and then the printer
        def create_printer
          # Create the printer port first
          windows_printer_port new_resource.ipv4_address

          port_name = "IP_#{new_resource.ipv4_address}"

          declare_resource(:powershell_script, "Creating printer: #{new_resource.device_id}") do
            code <<-EOH

              Set-WmiInstance -class Win32_Printer `
                -EnableAllPrivileges `
                -Argument @{ DeviceID   = "#{new_resource.device_id}";
                            Comment    = "#{new_resource.comment}";
                            Default    = "$#{new_resource.default}";
                            DriverName = "#{new_resource.driver_name}";
                            Location   = "#{new_resource.location}";
                            PortName   = "#{port_name}";
                            Shared     = "$#{new_resource.shared}";
                            ShareName  = "#{new_resource.share_name}";
                          }
            EOH
          end
        end

        def delete_printer
          declare_resource(:powershell_script, "Deleting printer: #{new_resource.device_id}") do
            code <<-EOH
              $printer = Get-WMIObject -class Win32_Printer -EnableAllPrivileges -Filter "name = '#{new_resource.device_id}'"
              $printer.Delete()
            EOH
          end
        end
      end
    end
  end
end