module Fog
  module Parsers
    module Terremark

      class GetVdc < Fog::Parsers::Base

        def reset
          @in_storage_capacity = false
          @in_cpu = false
          @in_memory = false
          @in_instantiated_vms_quota = false
          @in_deployed_vms_quota = false
          @response = { 
            'links' => [],
            'AvailableNetworks' => [],
            'ComputeCapacity'   => {
              'Cpu' => {},
              'DeployedVmsQuota' => {},
              'InstantiatedVmsQuota' => {},
              'Memory' => {}
            },
            'StorageCapacity'  => {},
            'ResourceEntities' => []
          }
        end

        def start_element(name, attributes)
          @value = ''
          case name
          when 'Cpu'
            @in_cpu = true
          when 'DeployedVmsQuota'
            @in_deployed_vms_quota = true
          when 'InstantiatedVmsQuota'
            @in_instantiated_vms_quota = true
          when 'Link'
            link = {}
            until attributes.empty?
              link[attributes.shift] = attributes.shift
            end            
            @response['links'] << link
          when 'Memory'
            @in_memory = true
          when 'Network'
            network = {}
            until attributes.empty?
              network[attributes.shift] = attributes.shift
            end
            @response['AvailableNetworks'] << network
          when 'ResourceEntity'
            resource_entity = {}
            until attributes.empty?
              resource_entity[attributes.shift] = attributes.shift
            end
            @response['ResourceEntities'] << resource_entity
          when 'StorageCapacity'
            @in_storage_capacity = true
          when 'Vdc'
            vdc = {}
            until attributes.empty?
              if attributes.first.is_a?(Array)
                attribute = attributes.shift
                vdc[attribute.first] = attribute.last
              else
                vdc[attributes.shift] = attributes.shift
              end
            end
            @response['href'] = vdc['href']
            @response['name'] = vdc['name']
          end
        end

        def end_element(name)
          case name
          when 'Allocated', 'Limit', 'Units', 'Used'
            if @in_cpu
              @response['Compute Capacity']['Cpu'][name] = @value
            elsif @in_deployed_vms_quota
              @response['Compute Capacity']['DeployedVmsQuota'][name] = @value
            elsif @in_instantiated_vms_quota
              @response['Compute Capacity']['InstantiatedVmsQuota'][name] = @value
            elsif @in_memory
              @response['Compute Capacity']['Memory'][name] = @value
            elsif @in_storage_capacity
              @response['StorageCapacity'][name] = @value
            end
          when 'Cpu'
            @in_cpu = false
          when 'DeployedVmsQuota'
            @in_deployed_vms_quota = false
          when 'InstantiatedVmsQuota'
            @in_instantiated_vms_quota = false
          when 'Memory'
            @in_memory = false
          when 'StorageCapacity'
            @in_storage_capacity = false
          when 'Type'
            @response[name] = @value
          end
        end

      end

    end
  end
end