module Savio
  class ButtonManager
    attr_reader :selected, :buttons

    @@buttonManagers = []
    def self.buttonManagers
      @@buttonManagers
    end

    def initialize(args = {})
      @@buttonManagers.push(self)

      @buttons = []
      @selected = []

      @type = args[:type] || 'radio'

      if @type != 'checkbox' && @type != 'radio'
        raise ArgumentError, 'ButtonManager type ' + @type.to_s + ' is invalid. Must be radio or checkbox'
      end

    end

    def type=(type)
      if type == 'radio' || type == "checkbox"
        @type = type
      else
        raise ArgumentError, 'ButtonManager type ' + type.to_s + ' is invalid. Must be radio or checkbox'
      end
    end

    def addButton(button)
      if button.class.name != 'Savio::Button'
        raise ArgumentError, 'Given object ' + button.to_s + ' is not a Button. Must be of type Button'
      end
      button.deselect(false)
      @buttons.push(button)
      if button.buttonManager != self
        button.buttonManager = self
      end
    end

    def removeButton(button, overwrite = true)
      if @buttons.include?(button)
        @buttons.delete(button)
        if @selected.include?(button)
          @selected.delete(button)
        end
        if overwrite == true
          button.buttonManager = nil
        end
      else
        raise ArgumentError, ('Could not find button ' + button.to_s + ' in buttonManager')
      end
    end

    def toggle(button)
      if @buttons.include?(button)
        if @type == 'checkbox'
          if button.selected
            deselect(button)
          else
            select(button)
          end
        elsif @type == 'radio'
          select(button)
        end
      else
        raise ArgumentError, ('Could not find button ' + button.to_s + ' in buttonManager')
      end
    end

    def select(button)
      if @buttons.include?(button)
        if @type == 'checkbox'
          @selected.push(button)
          button.select(false)
        elsif @type == 'radio'
          @buttons.each do |i|
            i.deselect(false)
          end
          @selected.clear
          @selected.push(button)
          button.select(false)
        end
      else
        raise ArgumentError, ('Could not find button ' + button.to_s + ' in buttonManager')
      end
    end

    def deselect(button)
      if @buttons.include?(button)
        if @type == 'checkbox'
          @selected.delete(button)
          button.deselect(false)
        elsif @type == 'radio'
          @selected.delete(button)
          button.deselect(false)
        end
      else
        raise ArgumentError, ('Could not find button ' + button.to_s + ' in buttonManager')
      end
    end

  end
end