create_the_cart = -> () {
  # -1 is a placeholder for user id when we implement users
  # auid will still be used in case user is not logged in
  Cart.find_or_create(anonymous_id, logged_in_user_id).to_json
}
post '/cart', &create_the_cart
put  '/cart', &create_the_cart

get '/cart' do
  Cart.just_find(anonymous_id, logged_in_user_id).to_json
end

# gets number of items in cart for every item
get '/cart/item' do
  Cart.just_find(anonymous_id, logged_in_user_id).item_in_carts.to_json
end

update_cart_item = ->() {
  cart_id = Cart.just_find(anonymous_id, logged_in_user_id).id
  item_id = @json_params["item_id"].to_i
  count = @json_params["count"].to_i
  ItemInCart.update_state(cart_id, item_id, count).to_json
}
put '/cart/item', &update_cart_item
post '/cart/item', &update_cart_item


# gets list of items in cart without count
get '/cart/item/display' do
  cart = Cart.just_find(anonymous_id, logged_in_user_id)
  item_ids = cart.item_in_carts.map do |x|
    x.item_id
  end
  items = []
  items = Item.find(item_ids) if cart.item_in_carts.length > 0
  prepare_items_for_mass_display(items)
end

get '/cart/delivery_destination' do
  cart = Cart.just_find(anonymous_id, logged_in_user_id)
  cart.delivery_destination.to_json(:except => [:created_at, :email_verification_code, :phone_verification_code])
end

update_delivery_destination = ->() {
  cart = Cart.just_find(anonymous_id, logged_in_user_id)
  allowed_keys = ["name", "address", "place", "postal_code", "phone", "email", "note"]
  params = @json_params.reject { |key,_| !allowed_keys.include?(key) }
  cart.delivery_destination.update_attributes(params)
  cart.delivery_destination.save!
  cart.delivery_destination.to_json(:except => [:created_at, :email_verification_code, :phone_verification_code])
}
put '/cart/delivery_destination', &update_delivery_destination
post '/cart/delivery_destination', &update_delivery_destination


def report_to_trello(cart)
  Thread.new do 
    @cart = cart
    board = Trello::Board.find('FqDO1eFL')
    list = board.lists.first
    card = Trello::Card.new
    card.list_id = list.id
    card.name = cart.title
    card.pos = "bottom"
    card.desc = erb(:cart_trello, :layout => false)
    card.save
  end
end

def send_order_email(cart)
  Thread.new do 
    client = SendGrid::Client.new(
      api_user: "ribica", 
      api_key: "plava*kutija*svjetlo*torba07"
    )

    email = SendGrid::Mail.new do |m|
      m.to      = "narudzbe@ribica.ba"
      m.from    = "draga@ribica.ba"
      m.from_name = "Prodavnica Ribica"
      m.subject = "Nova Narudžba: #{cart.id}"
      m.html    = "Mušterija naručila nešto. <br /> Pogledati https://www.ribica.ba/backoffice/carts/#{cart.id}"
    end
    client.send(email)
  end
end


post '/cart/confirmation' do
  anonymous = anonymous_id
  cart = Cart.just_find(anonymous, logged_in_user_id)
  if cart.item_in_carts.length > 0
    cart.ordered = true
    cart.save!
  end
  # since there is no more ordered cart this needs to be done
  # in order for next call of Cart#just_find to be ready
  Cart.find_or_create(anonymous, logged_in_user_id)
  report_to_trello(cart)
  send_order_email(cart)
  "OK".to_json
end