module Fog
  module Parsers
    module Compute
      module AWS
        class DescribeImages < Fog::Parsers::Base
          def reset
            @block_device_mapping = {}
            @image = { 'blockDeviceMapping' => [], 'productCodes' => [], 'stateReason' => {}, 'tagSet' => {} }
            @response = { 'imagesSet' => [] }
            @state_reason = {}
            @tag = {}
          end

          def start_element(name, attrs = [])
            super
            case name
            when 'blockDeviceMapping'
              @in_block_device_mapping = true
            when 'productCodes'
              @in_product_codes = true
            when 'stateReason'
              @in_state_reason = true
            when 'tagSet'
              @in_tag_set = true
            end
          end

          def end_element(name)
            if @in_block_device_mapping
              case name
                when 'blockDeviceMapping'
                  @in_block_device_mapping = false
                when 'deviceName', 'virtualName', 'snapshotId', 'deleteOnTermination', 'volumeType', 'encrypted'
                  @block_device_mapping[name] = value
                when 'volumeSize'
                  @block_device_mapping[name] = value.to_i
                when 'item'
                  @image['blockDeviceMapping'] << @block_device_mapping
                  @block_device_mapping = {}
              end
            elsif @in_product_codes
              case name
              when 'productCode'
                @image['productCodes'] << value
              when 'productCodes'
                @in_product_codes = false
              end
            elsif @in_tag_set
              case name
                when 'item'
                  @image['tagSet'][@tag['key']] = @tag['value']
                  @tag = {}
                when 'key', 'value'
                  @tag[name] = value
                when 'tagSet'
                  @in_tag_set = false
              end
            elsif @in_state_reason
              case name
              when 'code', 'message'
                @state_reason[name] = value
              when 'stateReason'
                @image['stateReason'] = @state_reason
                @state_reason = {}
                @in_state_reason = false
              end
            else
              case name
              when 'architecture', 'description', 'hypervisor', 'imageId', 'imageLocation', 'imageOwnerAlias', 'imageOwnerId', 'imageState', 'imageType', 'kernelId', 'name', 'platform', 'ramdiskId', 'rootDeviceType','rootDeviceName','virtualizationType'
                @image[name] = value
              when 'isPublic','enaSupport'
                if value == 'true'
                  @image[name] = true
                else
                  @image[name] = false
                end
              when 'creationDate'
                @image[name] = Time.parse(value) if value && !value.empty?
              when 'item'
                @response['imagesSet'] << @image
                @image = { 'blockDeviceMapping' => [], 'productCodes' => [], 'stateReason' => {}, 'tagSet' => {} }
              when 'requestId'
                @response[name] = value
              end
            end
          end
        end
      end
    end
  end
end