#!/usr/bin/env ruby

libdir = File.join(File.dirname(File.dirname(__FILE__)), "lib")
$LOAD_PATH.unshift(libdir) unless $LOAD_PATH.include?(libdir)

require 'pathname'
require 'rubygems'

module Middleman
  module ProjectLocator
    class << self
      def locate_middleman_root!(args)
        cwd = Dir.pwd
      
        if !in_middleman_project? && !in_middleman_project_subdirectory?
          $stderr.puts "== Error: Could not find a Middleman project config, perhaps you are in the wrong folder?"
          return
        end
      
        if in_middleman_project?
          did_locate_middleman_project(cwd, args)
          return
        end
      
        Dir.chdir("..") do
          # Recurse in a chdir block: if the search fails we want to be sure
          # the application is generated in the original working directory.
          locate_middleman_root!(args) unless cwd == Dir.pwd
        end
      rescue SystemCallError
        # could not chdir, no problem just return
      end

      def in_middleman_project?
        File.exists?('config.rb')
      end

      def in_middleman_project_subdirectory?(path = Pathname.new(Dir.pwd))
        File.exists?(File.join(path, 'config.rb')) || !path.root? && in_middleman_project_subdirectory?(path.parent)
      end
    
      def did_locate_middleman_project(path, args)
        # Set up gems listed in the Gemfile.
        ENV['BUNDLE_GEMFILE'] ||= File.expand_path('Gemfile', path)

        require 'bundler/setup' if File.exists?(ENV['BUNDLE_GEMFILE'])

        start_cli!(args)
      end
    
      def start_cli!(args)
        require 'middleman'
        Middleman::CLI.start(args)
      end
    end
  end
end

args = ARGV.dup

ARG_ALIASES = {
  "s" => "server",
  "b" => "build",
  "i" => "init",
  "w" => "watch"
}

if ARG_ALIASES.has_key?(args[0])
  args[0] = ARG_ALIASES[args[0]]
end
  
if args.length < 1 || %w(server build migrate).include?(args.first)
  Middleman::ProjectLocator.locate_middleman_root!(args)
else
  Middleman::ProjectLocator.start_cli!(args)
end