require 'rubygems'
require 'fileutils'
require 'net/http'
require 'net/https'
require 'uri'
require "open-uri"
require 'tempfile'
require File.dirname(__FILE__) + '/jam'

module Appjam
  module Generators
    class Gist < Jam
      
      class << self
        def self.attr_rw(*attrs)
          attrs.each do |attr|
            class_eval %Q{
              def #{attr}(val=nil)
                val.nil? ? @#{attr} : @#{attr} = val
              end
            }
          end
        end        
        attr_rw :gist_name, :gist_description, :gist_id, :gist_body   
        def preview_gist(gid)
          uri  = URI("https://gist.github.com/#{gid}.txt")
          http = Net::HTTP.new(uri.host, uri.port)
          if uri.scheme == 'https'
            http.use_ssl     = true
            http.verify_mode = OpenSSL::SSL::VERIFY_NONE
          end

          result   = http.start {|h| h.request(Net::HTTP::Get.new(uri.path))}
          tempfile = Tempfile.new('gist')
          tempfile.puts(result)
          tempfile.close

          if system('which qlmanage')
            system("qlmanage -p #{tempfile.path} >& /dev/null")
          end          
        end  
        
        def download_gists(username, page=1)
          puts "-- Downloading page #{page} of gists --"
          url = URI.parse("http://gist.github.com")
          res = Net::HTTP.start(url.host, url.port) do |http|
              response = http.get("/#{username}?page=#{page}")
              if response.code == '200'
                links = get_links(response.body)
                links.each do |link, gist_id|
                  puts "git://gist.github.com/#{gist_id}.git"
                  if File.directory?("Support/#{gist_id}")
                    `cd Support/#{gist_id} && git pull ; cd ..`
                  else
                    `git clone git://gist.github.com/#{gist_id}.git Support/#{gist_id}`
                  end
                end
                download_gists(username, page+1) unless links.empty?
              end
          end
        end     
        
        def download_gist(gist_id,git_category,gist_name)
          puts "-- fetching gist [#{gist_name}] --"
          # require 'uri'
          # require 'yajl/http_stream'
          # 
          # uri = URI.parse("http://gist.github.com/api/v1/json/#{gist_id}")
          # Yajl::HttpStream.get(uri, :symbolize_keys => true) do |hash|
          #   
          # end      
          if File.directory?("Support/#{git_category}/#{gist_name}")
            `rm -rf Support/#{git_category}/#{gist_name}`
          end
          `git clone git://gist.github.com/#{gist_id}.git Support/#{git_category}/#{gist_name} && rm -rf Support/#{git_category}/#{gist_name}/.git`
          if system('which qlmanage')
            system("qlmanage -p Support/#{git_category}/#{gist_name}/*.* >& /dev/null")
          end
        end                 
      end
      
      gist_name "singleton"
      gist_id "https://gist.github.com/979981"
      gist_description "Singletons in Objective C"
      
      # Add this generator to our appjam
      Appjam::Generators.add_generator(:gist, self)

      # Define the source Gist root
      def self.source_root; File.expand_path(File.dirname(__FILE__)); end
      def self.banner; "appjam gist [name]"; end

      # Include related modules
      include Thor::Actions
      include Appjam::Generators::Actions            

      desc "Description:\n\n\tappjam will generates function snippet for iphone"

      argument :name, :desc => "The name of your function"

      class_option :root, :desc => "The root destination", :aliases => '-r', :default => ".", :type => :string
      class_option :destroy, :aliases => '-d', :default => false,   :type    => :boolean

      def in_app_root?
        File.exist?('Classes')
      end     

      def create_git  
        if in_app_root? 
          valid_constant?(options[:gist] || name)
          @gist_name = (options[:app] || name).gsub(/W/, "_").downcase
          @class_name = (options[:app] || name).gsub(/W/, "_").capitalize
          @xcode_project_name = File.basename(Dir.glob('*.xcodeproj')[0],'.xcodeproj').downcase
          @developer = "eiffel"
          @created_on = Date.today.to_s
          self.destination_root = options[:root]
          
          require 'yaml'
          g = YAML.load_file(File.expand_path(File.dirname(__FILE__) + '/gist.yml'))   
          g.each_pair {|key,value|
            gcategory = key.downcase
            g[key].each { |k|
              k.each_pair { |k1,v1|
                if "#{k1}" == @gist_name
                  gid = k[k1][0]['id']
                  gname = k[k1][1]['name'].downcase
                  Gist::download_gist("#{gid}".to_i,gcategory,gname)
                  eval(File.read(__FILE__) =~ /^__END__/ && $' || '')
                  say "================================================================="
                  say "Your '#{gname.capitalize}' design pattern snippet has been generated."
                  say "Check Support/#{gcategory}/#{gname}/ for Snippet"
                  say "Open #{@xcode_project_name.capitalize}.xcodeproj"
                  say "Add 'Support/#{gcategory}/#{gname}/' folder to the 'Classes/apps' Group"
                  say "Build and Run"          
                  say "================================================================="              
                end                  
              }
            }
          }
        else 
          puts
          puts '-'*70
          puts "You are not in an iphone project folder"
          puts '-'*70
          puts
        end
      end

    end # Gist
  end # Generators
end # Appjam

__END__
# put your Gist command here