#!/usr/bin/env ruby
require "thor"
require 'find'
require 'erb'

module RailsMongoBackboneBootstrapTmpl
	class Rmbb_Generator < Thor
		include Thor::Actions

		desc "new", "Auto create new rails app based on mongo , devise, backboneJs, bootstrap"
		method_option :app_path, :type => :string, :aliases => "-p", :desc => "where you want your rails application placed to"
		method_option :db_name, :type => :string, :aliases => "-d", :desc => "set database name"
		method_option :rvmrc, :type => :string, :aliases => "-r", :desc => "create .rvmrc file with rvmrc string value"

		def new(app_name)
			app_name = app_name.gsub(/[\s]+/,'_').capitalize
			say "Your app name will be : #{app_name} \n"

			app_path = options[:app_path] || "./"
			app_whole_path = "#{File.expand_path(app_path,__FILE__)}/#{app_name}"
			template_path = File.expand_path('../../template',__FILE__)

			say "Your app name will be : #{app_name} , path to : #{app_whole_path} \n"

			db_name = options[:db_name] || app_name.downcase
		  if Dir.exists? app_whole_path
				result = ask "#{app_whole_path} existed ! Are you overwritten it ? [yes/no]"
				if !result.eql? 'no'
					self.copy_file(app_whole_path,template_path)
					self.replace_file(app_whole_path, app_name, db_name)
					self.create_rvmrc_file(app_whole_path,options[:rvmrc]) if options[:rvmrc]
					say "create new app successfully!\n"
				else
					say "command terminated by user.\n"
				end
			else
				self.copy_file(app_whole_path,template_path)
				self.replace_file(app_whole_path, app_name, db_name)
				self.create_rvmrc_file(app_whole_path,options[:rvmrc]) if options[:rvmrc]
				say "create new app successfully!\n"
			end
			
		end

		protected

		def copy_file(app_whole_path,template_path)
			FileUtils.mkdir_p "#{app_whole_path}"
			FileUtils.cp_r "#{template_path}/.", "#{app_whole_path}"

		end
		def replace_file(target_path,app_name,db_name)
			Find.find(target_path) do |f|
				if File.file?(f) and f.to_s.match(/(.rb$)|(.ru$)|(.slim$)|(Rakefile$)|(.yml$)/)
					content = ERB.new(File.new(f).read).result(binding)
					File.open(f, 'w') { |p| p.write(content) }
				end
			end
		end
		def create_rvmrc_file(target_path,rvmrc_string)
			File.open("#{target_path}/.rvmrc","w+"){|f| f.write(rvmrc_string)}
		end

	end
end

RailsMongoBackboneBootstrapTmpl::Rmbb_Generator.start