class List
  include SimplyStored::Couch
  
  property :state, default: 'active' # active, #closed
  property :needs_help, type: :boolean, default: false
  property :needs_payment, type: :boolean, default: false
  property :closed_at, type: Time
  property :join_requests, type: Array, default: []

  has_many :orders, dependent: :destroy
  belongs_to :table
  belongs_to :supplier
  belongs_to :section
  has_and_belongs_to_many :users, storing_keys: true

  validates :table_id, presence: true
  validates :supplier_id, presence: true

  view :by_supplier_id_and_id, key: [:supplier_id, :_id]

  view :active_by_table_id, type: :custom, map_function: %|function(doc){
    if(doc.ruby_class == 'List' && doc.state == 'active'){
      emit(doc.table_id, 1); 
    }
  }|, reduce_function: '_sum'

  def self.from_table table, user
    return if user.has_active_list?
    list = new table: table, supplier_id: table.supplier_id, section_id: table.section_id
    list.add_user user
    list.save
    user.active_list_id = list.id
    user.save
    list
  end

  def self.of_user(user, options = {})
    database.view(association_list_has_and_belongs_to_many_users({startkey: [user.id], endkey: ["#{user.id}\u9999"], include_docs: true, reduce: false}.merge(options)))
  end

  def close!
    orders.map(&:close!)
    self.state = 'closed'
    self.closed_at = Time.now
    save
  end

  def supplier
    table.supplier
  end

  def table_number
    @table_number ||= table.number
  end

  def active?
    state == 'active'
  end

  def place_order(user, products)
    return false unless products.any?
    return false unless user
    @order = Order.create list: self, supplier: supplier, user: user
    return unless @order.id
    loaded_products = self.class.database.load_document products.keys
    products.each do |product_id, number|
      number = number.to_i
      product = loaded_products.find{|p| p.id == product_id} # to get the price
      ProductOrder.create order: @order, product_id: product_id, amount: number, price: product.price if number > 0
    end
    @order
  end

  def move_to_table to_table
    UserTableMove.create list: self, from_table_id: table_id, to_table: to_table
    self.table = to_table
    self.section_id = to_table.section_id 
    save
  end

  def as_json
    super.merge(table_number: table_number)
  end
end