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class ExchangePlugin::Proposal < ActiveRecord::Base

  attr_accessible *self.column_names
  attr_accessible :origin, :target, :exchange

  belongs_to :origin, class_name: "Profile"
  belongs_to :target, class_name: "Profile"

  belongs_to :exchange, class_name: "ExchangePlugin::Exchange"

  has_many :elements, class_name: "ExchangePlugin::Element", dependent: :destroy, order: "id ASC"

  has_many :products, through: :elements, source: :object_np, class_name: 'Product',
    conditions: "exchange_plugin_elements.object_type = 'Product'"
  has_many :knowledges, through: :elements, source: :object_np, class_name: 'CmsLearningPlugin::Learning',
    conditions: "exchange_plugin_elements.object_type = 'CmsLearningPlugin::Learning'"

  has_many :messages, class_name: "ExchangePlugin::Message", dependent: :destroy, order: "created_at DESC"

  validates_inclusion_of :state, in: ["open", "closed", "accepted"]
  validates_presence_of :origin, :target, :exchange_id

  scope :open, conditions: {state: 'open'}
  scope :closed, conditions: {state: 'closed'}
  scope :accepted, conditions: {state: 'accepted'}
  def open?
    self.state == 'open'
  end
  def closed?
    self.state == 'closed'
  end
  def accepted?
    self.state == 'accepted'
  end

  def target_elements
    self.elements.all conditions: {profile_id: self.target_id}, include: :element
  end

  def origin_elements
    self.elements.all conditions: {profile_id: self.origin_id}, include: :element
  end

  def target? profile
    (profile.id == self.target_id)
  end

  def the_other(profile)
    target?(profile) ? self.origin : self.target
  end

  def my_elements(profile)
    target?(profile) ? self.target_elements : self.origin_elements
  end

  def other_elements(profile)
    target?(profile) ? self.origin_elements : self.target_elements
  end

end