require 'stackster/stack/stack_creater'
require 'stackster/stack/stack_updater'
require 'stackster/stack/stack_destroyer'
require 'stackster/stack/stack_reader'
require 'stackster/stack/stack_formater'
require 'stackster/stack/stack_lister'
require 'stackster/stack/status'

module Stackster
  class Stack

    def initialize(args)
      @name = args[:name]
      @config = Config.new :config => args[:config],
                           :logger => args[:logger] ||= StacksterLogger.new
      @entry = Entry.new :name   => @name,
                         :config => @config
    end

    # ToDo - maybe in stack creater
    # Rescure stack creation errors and verify entry is not saved
    def create(args)
      @template_file = args[:template]
      @entry.set_attributes args[:attributes]
      stack_creater.create
      @entry.save
    end

    # To Do - maybe in stack udpater
    # Rescure stack creation errors and verify entry is not saved
    def update(args)
      @template_body = template
      @entry.set_attributes args[:attributes]
      stack_updater.update_stack_if_parameters_changed args[:attributes]
      @entry.save
    end

    # To do - maybe in stack destroyer
    # Rescue stack creation exception and only delete on success
    def destroy
      stack_destroyer.destroy
      @entry.delete_attributes
    end

    def display
      stack_formater.display
    end
    
    def attributes
      stack_reader.attributes
    end

    def outputs
      stack_reader.outputs
    end

    def status
      stack_reader.status
    end

    def events(limit=3)
      stack_reader.events limit
    end

    def instances
      stack_reader.instances
    end

    def resources
      stack_reader.resources
    end

    def template
      stack_reader.template
    end

    def parameters
      stack_reader.parameters
    end

    private

    def stack_creater
      @stack_creater ||= StackCreater.new :name          => @name,
                                          :entry         => @entry,
                                          :template_file => @template_file,
                                          :config        => @config
    end

    def stack_updater
      @stack_updater ||= StackUpdater.new :name          => @name,
                                          :entry         => @entry,
                                          :template_body => @template_body,
                                          :config        => @config
    end

    def stack_destroyer
      @stack_destroyer ||= StackDestroyer.new :name   => @name,
                                              :config => @config
    end

    def stack_reader
      @stack_reader ||= StackReader.new :name   => @name,
                                        :config => @config
    end

    def stack_formater
      @stack_formater ||= StackFormater.new :name => @name,
                                            :config => @config
    end

    def stack_status
      @status ||= Status.new :name => @name,
                             :config => @config
    end

  end
end