require_relative 'text_color'

module WhirledPeas
  module Settings
    class Border
      Style = Struct.new(
        :top_left, :top_horiz, :top_junc, :top_right,
        :left_vert, :left_junc,
        :middle_vert, :cross_junc, :middle_horiz,
        :right_vert, :right_junc,
        :bottom_left, :bottom_horiz, :bottom_junc, :bottom_right
      )

      module Styles
        BOLD = Style.new(
          '┏', '━', '┳', '┓',
          '┃', '┣',
          '┃', '╋', '━',
          '┃', '┫',
          '┗', '━', '┻', '┛'
        )
        SOFT = Style.new(
          '╭', '─', '┬', '╮',
          '│', '├',
          '│', '┼', '─',
          '│', '┤',
          '╰', '─', '┴', '╯'
        )
        DOUBLE = Style.new(
          '╔', '═', '╦', '╗',
          '║', '╠',
          '║', '╬', '═',
          '║', '╣',
          '╚', '═', '╩', '╝'
        )

        def self.validate!(style)
          return unless style
          if style.is_a?(Symbol)
            error_message = "Unsupported border style: #{style}"
            begin
              style = self.const_get(style.upcase)
              raise ArgumentError, error_message unless style.is_a?(Style)
              style
            rescue NameError
              raise ArgumentError, error_message
            end
          else
            style
          end
        end
      end

      attr_writer :left, :top, :right, :bottom, :inner_horiz, :inner_vert

      def left?
        @left == true
      end

      def top?
        @top == true
      end

      def right?
        @right == true
      end

      def bottom?
        @bottom == true
      end

      def inner_horiz?
        @inner_horiz == true
      end

      def inner_vert?
        @inner_vert == true
      end

      def outer?
        left? || top? || right? || bottom?
      end

      def style
        @style || Styles::BOLD
      end

      def style=(val)
        @style = Styles.validate!(val)
      end

      def color
        @color || TextColor::WHITE
      end

      def color=(val)
        @color = TextColor.validate!(val)
      end
    end
  end
end