class User < ActiveRecord::Base
  acts_as_authentic
  has_many :residentships, :foreign_key => "resident_id"

  has_one :current_residentship,
    :class_name => "Residentship",
    :conditions => "moved_out_at IS NULL",
    :foreign_key => "resident_id"

  has_many :former_residentships,
    :class_name => "Residentship",
    :conditions => "moved_out_at IS NOT NULL",
    :foreign_key => "resident_id"

  named_scope :only_current,
    :include => :residentships,
    :conditions => "residentships.moved_out_at IS NULL"

  has_attached_file :avatar,
    :styles => {
      :large => "192x192>",
      :medium => "64x64>",
      :thumb => "50x50>" },
    :default_url => "/avatars/thumb/missing.gif"

  validates_presence_of :first_name
  validates_presence_of :last_name
  validates_presence_of :room_number
  validates_presence_of :moved_in_at

  delegate :hallway, :to => :room
  delegate :room, :to => :current_residentship, :allow_nil => true

  attr_accessor :avatar_width, :avatar_height, :avatar_x, :avatar_y

  attr_writer :room_number, :moved_in_at

  before_save :crop_avatar
  after_create :create_residentship

  def full_name
    "#{first_name} #{last_name}"
  end

  def room_number
    @room_number || (current_residentship && current_residentship.room_number)
  end

  def moved_out_at
    unless former_residentships.empty? or current_residentship
      former_residentships.first.moved_out_at
    end
  end

  def moved_in_at
    @moved_in_at || (current_residentship && current_residentship.moved_in_at)
  end

  def moved_out_at=(date)
    current_residentship.update_attribute(:moved_out_at, date)
  end

  def display_name
    full_name + (room ? " (#{room.number})" : "")
  end

protected

  def crop_avatar
    if !avatar.dirty? && avatar_width
      image = MiniMagick::Image.from_file(avatar.path(:large))
      image.crop("#{avatar_width}x#{avatar_height}+#{avatar_x}+#{avatar_y}")
      image.write(avatar.path)
      self.avatar.reprocess!
    end
  end

  def create_residentship
    Residentship.create(:resident => self, :room_number => @room_number, :moved_in_at => @moved_in_at)
  end
end