module Pave
  class Reload
    def self.live_reload(browser="chrome")
      # docs: http://brettterpstra.com/2011/03/07/watch-for-file-changes-and-refresh-your-browser-automatically/
      trap("SIGINT") { exit }

      puts "Watching #{watch_folder} and subfolders for changes in project files..."

      while true do
        files = []
        filetypes.each {|type|
          files += Dir.glob( File.join( watch_folder, "**", "*.#{type}" ) )
        }
        new_hash = files.collect {|f| [ f, File.stat(f).mtime.to_i ] }
        hash ||= new_hash
        diff_hash = new_hash - hash

        unless diff_hash.empty?
          hash = new_hash

          diff_hash.each do |df|
            print "Detected change in #{df[0]}, refreshing"
            if browser == "chrome"
              print " Chrome"
              %x{osascript<<ENDGAME
                tell application "Google Chrome"
                  set windowList to every window
                  repeat with aWindow in windowList
                    set tabList to every tab of aWindow
                    repeat with atab in tabList
                      if (URL of atab contains "#{keyword}") then
                        tell atab to reload
                      end if
                    end repeat
                  end repeat
                end tell
              }
            elsif browser == "safari"
              print " Safari"
              %x{osascript<<ENDGAME
                tell application "Safari"
                  set windowList to every window
                  repeat with aWindow in windowList
                    set tabList to every tab of aWindow
                    repeat with atab in tabList
                      if (URL of atab contains "#{keyword}") then
                        tell atab to set its URL to (get its URL)
                      end if
                    end repeat
                  end repeat
                end tell
              }
            elsif browser == "firefox"
              print " Firefox"
              %x{osascript<<ENDGAME
                tell app "Firefox" to activate
                tell app "System Events"
                  keystroke "r" using command down
                end tell
              }
            else
              puts "#{browser} is not supported yet. Feel free to add it and create a pull request!"
            end
            puts ""
          end
        end

        sleep 1
      end

    end

    def self.dev_extension
      "site"
    end

    def self.filetypes
      ['css','html','htm','php','rb','erb','less','js']
    end

    def self.watch_folder
      Dir.pwd
    end

    def self.keyword
      File.basename(Dir.pwd)
    end
  end
end