module Playbook::Props

def clear_props
  @props.keys.each { |prop_name| remove_method(prop_name) }
  @props.clear
end

def dark_props
  dark ? "dark" : nil
end

def generate_classname(*name_parts, separator: "_")
  [
    name_parts.compact.join(separator),
    prop(:classname),
    spacing_props,
    dark_props
  ].compact.join(" ")
end

def generate_classname_without_spacing(*name_parts, separator: "_")
  [
    name_parts.compact.join(separator),
    prop(:classname),
  ].compact.join(" ")
end

def initialize(prop_values = {}, &block)
  self.values = { children: block }.merge(Hash(prop_values))
  self.class.props.each do |key, definition|
    definition.validate! values[key]
  end
end

def partial(path)
  define_method(:to_partial_path) { path }
end

def prop(name)
  self.class.props[name].value values[name]
end

def prop(name, type: Playbook::Props::String, **options)
  @props ||= {}
  @props[name] = type.new(**options)
  define_method(name) { prop(name) }
end

def props
  @props
end

def spacing_options
  {
    margin: "m",
    margin_bottom: "mb",
    margin_left: "ml",
    margin_right: "mr",
    margin_top: "mt",
    margin_x: "mx",
    margin_y: "my",
    padding: "p",
    padding_bottom: "pb",
    padding_left: "pl",
    padding_right: "pr",
    padding_top: "pt",
    padding_x: "px",
    padding_y: "py",
  }
end

def spacing_props
  selected_props = spacing_options.keys.select { |sk| try(sk) }
  return nil unless selected_props.present?
  selected_props.map do |k|
    spacing_value = send(k)
    "#{spacing_options[k]}_#{spacing_value}" if spacing_values.include? spacing_value
  end.compact.join(" ")
end

def spacing_values
  %w[none xs sm md lg xl]
end