class Window_ShopBuy < Window_Selectable

  def initialize(x, y, height, shop_goods)
    super(x, y, window_width, height)
    @shop_goods = shop_goods
    @category = :item
    @money = 0
    refresh
    select(0)
  end

  def category=(category)
    return if @category == category
    @category = category
    refresh
    self.oy = 0
  end

  def make_item_list
    @data = []
    @price = {}
    categories = { :item => 0,:weapon => 1 ,:armor => 2, :key_item => 0 }
    @shop_goods.each do |goods|
      next unless goods[0] == categories[@category]
      case goods[0]
      when 0;  item = $data_items[goods[1]]
      when 1;  item = $data_weapons[goods[1]]
      when 2;  item = $data_armors[goods[1]]
      end
      if item
        next if (@category == :item && item.key_item?)
        next if (@category == :key_item && !item.key_item?)
        @data.push(item)
        @price[item] = goods[2] == 0 ? item.price : goods[3]
      end
    end
  end

end

class Scene_Shop < Scene_MenuBase

  def start
    super
    create_help_window
    create_gold_window
    create_command_window
    create_dummy_window
    create_number_window
    create_buy_category_window
    create_category_window
    create_status_window
    create_buy_window
    create_sell_window
  end

  def create_buy_window
    wy = @dummy_window.y + @category_window.height
    wh = @dummy_window.height - @category_window.height
    @buy_window = Window_ShopBuy.new(0, wy, wh, @goods)
    @buy_window.viewport = @viewport
    @buy_window.help_window = @help_window
    @buy_window.status_window = @status_window
    @buy_window.hide
    @buy_window.set_handler(:ok,     method(:on_buy_ok))
    @buy_window.set_handler(:cancel, method(:on_buy_cancel))
    @buy_category_window.item_window = @buy_window
  end

  def create_status_window
    wx = @number_window.width
    wy = @dummy_window.y + @category_window.height
    ww = Graphics.width - wx
    wh = @dummy_window.height - @category_window.height
    @status_window = Window_ShopStatus.new(wx, wy, ww, wh)
    @status_window.viewport = @viewport
    @status_window.hide
  end


  def create_buy_category_window
    @buy_category_window = Window_ItemCategory.new
    @buy_category_window.viewport = @viewport
    @buy_category_window.help_window = @help_window
    @buy_category_window.y = @dummy_window.y
    @buy_category_window.hide.deactivate
    @buy_category_window.set_handler(:ok,     method(:on_buy_category_ok))
    @buy_category_window.set_handler(:cancel, method(:on_buy_category_cancel))
  end



  def command_buy
    @dummy_window.hide
    @buy_window.show
    @status_window.show
    @buy_category_window.show.activate
    end


  def on_buy_cancel
    @buy_category_window.activate
    @buy_window.select(0)
    @status_window.item = nil
    @help_window.clear
  end

  def on_buy_category_ok
    activate_buy_window
  end

  def on_buy_category_cancel
    @command_window.activate
    @dummy_window.show
    @buy_category_window.hide
    @buy_window.hide
    @buy_window.deactivate
    @status_window.hide
    @status_window.item = nil
    @help_window.clear
    end

end