class Spring::Client::Help

def self.call(args)
  require "spring/commands"
  super
end

def self.description
  "Print available commands."
end

def all_commands
  spring_commands.merge application_commands
end

def call
  puts formatted_help
end

def command_help(subject, commands)
  ["Commands for #{subject}:\n",
  *commands.sort_by(&:first).map { |name, command| display(name, command) }.compact]
end

def display(name, command)
  if command.description
    "  #{name.ljust(max_name_width)}  #{command.description}"
  end
end

def formatted_help
  ["Version: #{env.version}\n",
   "Usage: spring COMMAND [ARGS]\n",
   *command_help("spring itself", spring_commands),
   '',
   *command_help("your application", application_commands)].join("\n")
end

def initialize(args, spring_commands = nil, application_commands = nil)
  super args
  @spring_commands      = spring_commands      || Spring::Client::COMMANDS.dup
  @application_commands = application_commands || Spring.commands.dup
  @spring_commands.delete_if { |k, v| k.start_with?("-") }
  @application_commands["rails"] = @spring_commands.delete("rails")
end

def max_name_width
  @max_name_width ||= all_commands.keys.map(&:length).max
end