module SvelteOnRails::Installer::Utils

def self.add_route(route)
  file_path = 'config/routes.rb'
  # Read the file content
  content = File.read(file_path)
  # Split content into lines
  lines = content.lines
  # Find the index of Rails.application.routes.draw do
  ind = -1
  lines.each_with_index do |line, i|
    if line.match?(/^\s*Rails.application.routes.draw\s*do[\s\S]+$/)
      ind = i
    end
  end
  # Insert
  if ind >= 0
    lines.insert(ind + 1, route)
  else
    raise "ERROR: Could not find Rails.application.routes.draw do"
  end
  # Write the modified content back to the file
  begin
    File.write(file_path, lines.map { |l| l.gsub(/\n/, '') }.join("\n"))
    puts "Successfully inserted «root '#{route}'» into '#{file_path}'"
  rescue => e
    raise "Error writing to #{file_path} => «#{e.message}»"
  end
end