require "forwardable"

require_relative "point"

class Graph
  attr_reader :start, :height, :width
  extend Forwardable
  def_delegators :@data, :[], :each_with_index

  def initialize(input)
    @data = input.each_with_index.map do |line, y|
      if y.zero?
        @start = Point.new(line.index("S"), y)
      end
      line.chars
    end
    @width = @data[0].size - 1
    @height = @data.size - 1
  end

  def to_s
    @data.map { |row| row.join("") }.join("\n")
  end

  def at(point)
    @data[point.y][point.x]
  end

  def out_of_bounds?(point)
    point.x < 0 || point.x > @width || point.y < 0 || point.y > @height
  end
end