class Memo < ActiveRecord::Base
	include Redmine::SafeAttributes
	belongs_to :forums
	belongs_to :author, :class_name => "User", :foreign_key => 'author_id' 

	validates_presence_of :author_id, :forum_id, :subject
	validates :content, presence: true
	validates_length_of :subject, maximum: 50
	validates_length_of :content, maximum: 2048	
	validate :cannot_reply_to_locked_topic, :on => :create
	validate :content_cannot_be_blank

	acts_as_tree :counter_cache => :replies_count, :order => "#{Memo.table_name}.created_at ASC"
	acts_as_attachable
	belongs_to :last_reply_id, :class_name => 'Memo', :foreign_key => 'last_reply_id'
	# acts_as_searchable :column => ['subject', 'content'],
	# 					#:include => { :forums => :p}
	# 					#:project_key => "#{Forum.table_name}.project_id"
	# 					:date_column => "#{table_name}.created_at"
	# acts_as_event :title => Proc.new {|o| "#{o.forums.name}: #{o.subject}"},
	# 				:description => :content,
	# 				:group => :parent,
	# 				:type => Proc.new {|o| o.parent_id.nil? ? 'message' : 'reply'},
	# 				:url => Proc.new {|o| {:controller => 'memos', :action => 'show', :forum_id => o.forum_id}.merge(o.parent_id.nil? ? {:id => o.id} : {:id => o.parent_id, :r => o.id, :anchor => "memo-#{o.id}"})}
	acts_as_activity_provider :find_options => {:include => [{:board => :project}, :author]},
								:author_key => :author_id
	acts_as_watchable

	safe_attributes "author_id",
					"subject",
					"content",
					"forum_id",
					"last_reply_id",
					"lock",
					"parent_id",
					"replies_count",
					"sticky"

	after_create :add_author_as_watcher, :reset_counters!
	# after_update :update_memos_forum
	after_destroy :reset_counters!
	# after_create :send_notification

	# scope :visible, lambda { |*args|
	# 	includes(:forum => ).where()
	# }

	def cannot_reply_to_locked_topic
		errors.add :base, 'Topic is locked' if root.locked? && self != root
	end
	def content_cannot_be_blank
		errors.add :base, "content can't be blank." if self.content.blank?
	end

	# def update_memos_forum
	# 	if forum_id_changed?
	# 		Message.update_all({:board_id => board_id}, ["id = ? OR parent_id = ?", root.id, root.id ])
	# 		Forum.reset_counters!(forum_id_was)
	# 		Forum.reset_counters!(forum_id)
	# 	end
	# end

	def reset_counters!
		if parent && parent.id
			Memo.update_all({:last_reply_id => parent.children.maximum(:id)}, {:id => parent.id})
		end
		# forums.reset_counters!
	end
	
	def sticky=(arg)
		write_attribute :sticky, (arg == true || arg.to_s == '1' ? 1 : 0)
	end

	def sticky?
		sticky == 1
	end

	def replies
	  Memo.where("parent_id = ?", id)
	end

	def locked?
		self.lock
	end
	
	def editable_by? user
		# user && user.logged? || (self.author == usr && usr.allowed_to?(:edit_own_messages, project))
		user.admin?
	end

	def destroyable_by? user
		user && user.logged? && Forum.find(self.forum_id).creator_id == user.id || user.admin?
		#self.author == user || user.admin?
	end

	private

	def add_author_as_watcher
		Watcher.create(:watchable => self.root, :user => author)
	end

	def send_notification
		if Setting.notified_events.include?('message_posted')
			Mailer.message_posted(self).deliver
		end
	end

end