#!/usr/bin/env ruby
require 'fileutils'
REFINERY_ROOT = File.expand_path(File.dirname(__FILE__) << "/..")
unless (override_path = ARGV.shift).nil? or (override_path.length == 0)
  # if "" or "." or "./" is specified then get the current directory otherwise accept the specified app_path.
  if ((app_path = ARGV.shift).nil? or app_path.length <= 2) and ((is_current_dir = app_path =~ /(\.(\/)?)/).nil? or !is_current_dir or is_current_dir < 2)
    RAILS_ROOT = Dir.getwd
  else
    RAILS_ROOT = app_path
  end

  if File.exists? RAILS_ROOT
    # figure out what to override
    override_parts = override_path.downcase.split('/').compact.collect {|part| part if part.length > 0 }.compact
    admin = ""
    if override_parts.first == "admin"
      # we're inside the admin namespace
      admin = override_parts.shift
    end

    if override_parts.length > 1
      # controller plus action is specified
      action = override_parts.pop
    end

    # controller is what's left.
    controller = override_parts.first
    controller_with_admin = [admin,override_parts].flatten.compact.join('/')

    # copy the controller
    unless controller_with_admin =~ /\*(\*)?/ and !action.nil?
      refinery_controllers = Dir[File.join(REFINERY_ROOT, %w(vendor plugins ** app controllers), "#{controller_with_admin}_controller.rb")]
      unless refinery_controllers.compact.empty? # the controllers may not exist.
        refinery_controllers.each do |refinery_controller|
          # make the directories
          FileUtils.mkdir_p(copy_to = File.join(RAILS_ROOT, %w(app controllers), admin))
          FileUtils.cp(refinery_controller, copy_to)
        end
      else
        puts "Note: Couldn't find a matching controller to override."
      end
    end

    # copy the action, if it exists
    unless action.nil? or action.length == 0
      # get all the matching files
      looking_for = File.join(REFINERY_ROOT, %w(vendor plugins ** app views), controller_with_admin.split('/'), "#{action}*.erb")
      action_files = Dir[looking_for]

      # copy in the action template
      action_files.each do |action_file|
        action_file_path = action_file.split("/app/views/").last
        action_file_dir = action_file_path.split('/')
        action_file_dir.pop # get rid of the file.

        FileUtils.mkdir_p(File.join(RAILS_ROOT, %w(app views), action_file_dir))
        FileUtils.cp action_file, File.join(RAILS_ROOT, %w(app views), action_file_path)
      end
    else
      puts "Note: No action was specified."
    end

  else
    puts "Couldn't understand your project's directory?"
  end
else
  puts "You didn't specify anything to override. Here's some examples:"
  puts "refinery-override /pages/* /path/to/my/project"
  puts "refinery-override /pages/show /path/to/my/project"
  puts "refinery-override /admin/pages/index"
  puts "refinery-override /shared/_menu /path/to/my/project"
  puts "refinery-override **/*menu /path/to/my/project"
  puts "refinery-override /shared/_menu_branch"
end