Intractable Complexity

#!/usr/bin/env ruby

@filepath = ENV['TM_FILEPATH']
def file_to_class_name(str)
  str.to_s.gsub(/\/(.?)/) { "::" + $1.upcase }.gsub(/(^|_)(.)/) { $2.upcase }
end
if @filepath =~ /^(.*?)\/(app|spec)\/(controllers|helpers|models|views)\/(.*?)([^\/\.]+)\.(\w+)$/
  @app_root, @source_or_spec, @type, @sub_path, @file_base_name, @extention = $1, $2, $3, $4, $5, $6
  if @source_or_spec =="app" 
    # Source file
    @target_base = "spec" 
    if @file_base_name[0] == ?_
      @target_file = @file_base_name[1..-1] + "_partial_spec.rb" 
    else
      @target_file = @file_base_name+"_spec.rb" 
    end
    @file_type = "spec file" 
  else
    # Spec file
    @target_base = "app" 
    @target_ext = (@type == "views") ? ".rhtml" : ".rb" 
    if @file_base_name =~ /_partial_spec$/
      @target_ext = @file_base_name.sub(/_partial_spec/,'') + @target_ext
    else
      @target_file = @file_base_name.sub(/_spec/,'') + @target_ext
    end
    @file_type = "source file" 
  end
  @short_path = "#{@target_base}/#{@type}/#{@sub_path}#{@target_file}" 
  @open_path = "#{@app_root}/#{@short_path}" 
  if File.exists?(@open_path)
    `mate #{@open_path}`
  else
    @ans = `#{ ENV['TM_SUPPORT_PATH'] }/bin/CocoaDialog.app/Contents/MacOS/CocoaDialog yesno-msgbox --no-cancel --icon document --informative-text "APP_ROOT\/#{@short_path}" --text "Create missing #{@file_type}?"` 
    if @ans.to_s.chomp == "1" 
      @extra_depth = "/.." * @sub_path.split('/').length
      if @target_base == "spec" && @type != "views" 
        @new_file = <<-RUBY
require File.dirname(__FILE__) + '/..#{@extra_depth}/spec_helper'

describe ${1:#{file_to_class_name @file_base_name}}${2: ,"${3:in a certain state}"} do
   ${4:before(${5::each}) do
     $6
   end}
   ${7:it "should ${8:do something interesting}" do
     $0
   end}
end
RUBY
      elsif @target_base == "spec" && @type == "views" 
        @new_file = <<-RUBY
require File.dirname(__FILE__) + '/..#{@extra_depth}/spec_helper'

describe "${1:$2#{@sub_path}#{@file_base_name}}" do
   ${3:before(${4::each}) do
     ${5:render :partial=>'#{@sub_path}#{@file_base_name}'}
   end}
   ${6:it "should ${7:do something interesting}" do
     ${8:response.should have_tag("${9:selector}")}
   end}
end
RUBY
      elsif @target_base == "app" && @type != "views" 
        case @type
        when "controllers" 
          @classdef = "class ${1:#{file_to_class_name @file_base_name}} < ApplicationController" 
        when "models" 
          @classdef = "class ${1:#{file_to_class_name @file_base_name}} < ActiveRecord::Base" 
        when "helpers" 
          @classdef = "module ${1:#{file_to_class_name @file_base_name}}" 
        end
        @new_file = <<-RUBY
#{@classdef}
  $0
end
RUBY
      else
        @new_file = "" 
      end
      `mkdir -p #{File.dirname @open_path}`
      `touch #{@open_path}`
      `osascript &>/dev/null -e 'tell app "SystemUIServer" to activate' -e 'tell app "TextMate" to activate'`
      `mate #{@open_path}`
      `osascript &>/dev/null -e "tell app \\"TextMate\\" to insert \\"#{@new_file.gsub("\n","\\n").gsub('$','\\$').gsub('"','\\\\\\\\\\\\"')}\\" as snippet true"`
    else
      puts "Cancelled" 
    end
  end

else
  puts "Can't recognize file: #{@filepath}" 
end