class Issue < ActiveRecord::Base
  belongs_to :reportable, :polymorphic => true
  belongs_to :reported_user, :class_name => "User", :foreign_key => :reported_user_id
  belongs_to :user_updated, :class_name => "User", :foreign_key => :updated_by

  has_many :reports, :dependent => :destroy
  has_many :comments, :class_name => "IssueComment", :dependent => :destroy

  validates :reportable_id, :uniqueness => { :scope => [:reportable_type] }
  validates :reported_user_id, :presence => true

  before_validation :set_reported_user

  # Check if more statuses are needed
  enum :status => %w[open ignored resolved]
  enum :type => %w[administrator moderator]

  scope :with_status, ->(issue_status) { where(:status => statuses[issue_status]) }

  def read_reports
    resolved_at.present? ? reports.where("updated_at < ?", resolved_at) : nil
  end

  def unread_reports
    resolved_at.present? ? reports.where("updated_at >= ?", resolved_at) : reports
  end

  include AASM
  aasm :column => :status, :no_direct_assignment => true do
    state :open, :initial => true
    state :ignored
    state :resolved

    event :ignore do
      transitions :from => :open, :to => :ignored
    end

    event :resolve do
      transitions :from => :open, :to => :resolved
      after do
        self.resolved_at = Time.now.getutc
      end
    end

    event :reopen do
      transitions :from => :resolved, :to => :open
      transitions :from => :ignored, :to => :open
    end
  end

  private

  def set_reported_user
    self.reported_user = case reportable.class.name
                         when "User"
                           reportable
                         when "Note"
                           reportable.author
                         else
                           reportable.user
                         end
  end
end