# TODO: which require statement to use here? require_dependency breaks stuff
require_dependency 'issue'

# Patches Redmine's Issues dynamically.

module IssuePatch
  def self.included(base) # :nodoc:
    base.extend(ClassMethods)

    base.send(:include, InstanceMethods)

    # Same as typing in the class 
    base.class_eval do
      unloadable
      
      belongs_to :deliverable
      has_many :cost_entries, :dependent => :delete_all
      
      # disabled for now, implements part of ticket blocking
      #alias_method_chain :validate, :deliverable
    end
  end
  
  module ClassMethods
    
  end
  
  module InstanceMethods
    def validate_with_deliverable
      if deliverable_id_changed?
        if deliverable_id_was.nil?
          # formerly unassigned ticket
          errors.add :deliverable_id, :activerecord_error_invalid if deliverable.blocked?
        else
          old_deliverable = Deliverable.find(deliverable_id_was)
          errors.add :deliverable_id, :activerecord_error_invalid if old_deliverable.blocked?
        end
      end
      
      validate_without_deliverable
    end
    
    # Wraps the association to get the Deliverable subject.  Needed for the 
    # Query and filtering
    def deliverable_subject
      unless self.deliverable.nil?
        return self.deliverable.subject
      end
    end

    def overall_costs
      @overall_costs || material_costs + labor_costs
    end
    
    def material_costs
      @material_costs || cost_entries.collect(&:costs).compact.sum
    end
    
    def labor_costs
      @labor_costs || time_entries.collect(&:costs).compact.sum
    end
    
    
  end
end