require 'fog/openstack/models/collection'
require 'fog/openstack/models/identity_v3/project'

module Fog
  module Identity
    class OpenStack
      class V3
        class Projects < Fog::OpenStack::Collection
          model Fog::Identity::OpenStack::V3::Project

          @@cache = {}
          Fog::Identity::OpenStack::V3::Project.use_cache(@@cache)

          def all(options = {})
            if service.openstack_cache_ttl > 0
              cached_project, expires = @@cache[{:token => service.auth_token, :options => options}]
              return cached_project if cached_project && expires > Time.now
            end

            project_to_cache = load_response(service.list_projects(options), 'projects')
            if service.openstack_cache_ttl > 0
              @@cache[{:token => service.auth_token, :options => options}] = [project_to_cache,
                                                                              Time.now + service.openstack_cache_ttl]
            end
            return project_to_cache
          end

          def create(attributes)
            @@cache.clear if @@cache
            super(attributes)
          end

          def auth_projects(options = {})
            load(service.auth_projects(options).body['projects'])
          end

          def find_by_id(id, options=[]) # options can include :subtree_as_ids, :subtree_as_list, :parents_as_ids, :parents_as_list
            if options.is_a? Symbol # Deal with a single option being passed on its own
              options = [options]
            end

            if service.openstack_cache_ttl > 0
              cached_project, expires = @@cache[{:token => service.auth_token, :id => id, :options => options}]
              return cached_project if cached_project && expires > Time.now
            end
            project_hash = service.get_project(id, options).body['project']
            top_project = project_from_hash(project_hash, service)
            if options.include? :subtree_as_list
              top_project.subtree.map! {|proj_hash| project_from_hash(proj_hash['project'], service)}
            end
            if options.include? :parents_as_list
              top_project.parents.map! {|proj_hash| project_from_hash(proj_hash['project'], service)}
            end

            if service.openstack_cache_ttl > 0
              @@cache[{:token => service.auth_token, :id => id, :options => options}] = [
                top_project, Time.now + service.openstack_cache_ttl]
            end
            return top_project
          end

          private
          def project_from_hash(project_hash, service)
            Fog::Identity::OpenStack::V3::Project.new(project_hash.merge(:service => service))
          end
        end
      end
    end
  end
end
