class AmazingPrint::Formatters::BaseFormatter

def align(value, width)
  if options[:multiline]
    indent_option = options[:indent]
    effective_width = width + value.size - colorless_size(value)
    if indent_option.positive?
      value.rjust(effective_width)
    elsif indent_option.zero?
      "#{indent}#{value.ljust(effective_width)}"
    else
      "#{indent(indentation + indent_option)}#{value.ljust(effective_width)}"
    end
  else
    value
  end
end

def colorless(string)
  string.gsub(/\e\[[\d;]+m/, '')
end

def colorless_size(string)
  colorless(string).size
end

def get_limit_size
  case options[:limit]
  when true
    DEFAULT_LIMIT_SIZE
  else
    options[:limit]
  end
end

def indent(n = indentation)
  INDENT_CACHE[n] || (' ' * n)
end

def indentation
  inspector.current_indentation
end

def indented(&blk)
  inspector.increase_indentation(&blk)
end

def limited(data, width, is_hash: false)
  limit = get_limit_size
  if data.length <= limit
    data
  else
    # Calculate how many elements to be displayed above and below the separator.
    head = limit / 2
    tail = head - ((limit - 1) % 2)
    # Add the proper elements to the temp array and format the separator.
    temp = data[0, head] + [nil] + data[-tail, tail]
    temp[head] = if is_hash
                   "#{indent}#{data[head].strip} .. #{data[data.length - tail - 1].strip}"
                 else
                   "#{indent}[#{head.to_s.rjust(width)}] .. [#{data.length - tail - 1}]"
                 end
    temp
  end
end

def method_tuple(method)
  # See http://readruby.chengguangnan.com/methods#method-objects-parameters
  # (mirror: http://archive.is/XguCA#selection-3381.1-3381.11)
  args = method.parameters.inject([]) do |arr, (type, name)|
    name ||= (type == :block ? 'block' : "arg#{arr.size + 1}")
    arr << case type
           when :req        then name.to_s
           when :keyreq     then "#{name}:"
           when :key        then "*#{name}:"
           when :opt, :rest then "*#{name}"
           when :block      then "&#{name}"
           else '?'
           end
  end
  # method.to_s formats to handle:
  #
  # #<Method: Fixnum#zero?>
  # #<Method: Fixnum(Integer)#years>
  # #<Method: User(#<Module:0x00000103207c00>)#_username>
  # #<Method: User(id: integer, username: string).table_name>
  # #<Method: User(id: integer, username: string)(ActiveRecord::Base).current>
  # #<Method: #<Class:0x100c567f>(ActiveRecord::Querying)#first>
  # #<UnboundMethod: Hello#world>
  # #<UnboundMethod: Hello#world() /home/hs/code/amazing_print/spec/methods_spec.rb:68>
  #
  if method.to_s =~ %r{(Unbound)*Method: ((#<)?[^/#]*)[#.]}
    unbound = Regexp.last_match(1) && '(unbound)'
    klass = Regexp.last_match(2)
    if klass && klass =~ /(\(\w+:\s.*?\))/ # Is this ActiveRecord-style class?
      klass.sub!(Regexp.last_match(1), '') # Yes, strip the fields leaving class name only.
    end
    owner = "#{klass}#{unbound}".gsub('(', ' (')
  end
  [method.name.to_s, "(#{args.join(', ')})", owner.to_s]
end

def outdent
  i = indentation - options[:indent].abs
  INDENT_CACHE[i] || (' ' * i)
end

def should_be_limited?
  options[:limit] || (options[:limit].is_a?(Integer) && options[:limit].positive?)
end