#!/usr/bin/env python

import os, sys, subprocess, locale, urllib2, gobject

import pygtk
pygtk.require('2.0')
import gtk

def download_chunk(base):
  # download 10kb a time
  chunk = base.dl_response.read(10240)
  base.dl_bytes_so_far += len(chunk)
  base.tarball_file.write(chunk)

  if not chunk:
    base.tarball_file.close()
    return False

  percent = float(base.dl_bytes_so_far) / base.dl_total_size
  base.progressbar.set_fraction(percent)
  percent = round(percent*100, 2)
  base.progressbar.set_text("Downloaded %d" % (percent) + '%')
  
  sys.stdout.write("Downloaded %d of %d bytes (%0.2f%%)\r" % (base.dl_bytes_so_far, base.dl_total_size, percent))

  if base.dl_bytes_so_far >= base.dl_total_size:
    sys.stdout.write('\n')

  return True

class TorBrowserLauncher:
  def __init__(self, current_tbb_version):
    # figure out the architecture
    architecture = subprocess.check_output(['arch']).strip('\n')

    # figure out the language
    available_languages = ['en-US', 'ar', 'de', 'es-ES', 'fa', 'fr', 'it', 'ko', 'nl', 'pl', 'pt-PT', 'ru', 'vi', 'zh-CN']
    language = locale.getdefaultlocale()[0].replace('_', '-')
    if language not in available_languages:
      language = language.split('-')[0]
      if language not in available_languages:
        for l in available_languages:
          if l[0:2] == language:
            language = l
    # if language isn't available, default to english
    if language not in available_languages:
      language = 'en-US'

    # make sure local directory structure is setup
    data_dir = os.getenv('HOME')+'/.torbrowser'
    download_dir = data_dir+'/download'
    tbb_dir = data_dir+'/tbb/'+architecture+'/'+language
    if os.path.exists(download_dir) == False:
      print 'making '+download_dir
      os.makedirs(download_dir)
    if os.path.exists(tbb_dir) == False:
      print 'making '+tbb_dir
      os.makedirs(tbb_dir)

    # is TBB already installed?
    tbb_start = tbb_dir+'/start-tor-browser'
    if os.path.isfile(tbb_start):
      print 'Launching '+tbb_start
      subprocess.call([tbb_start])

    else:
      tarball_filename = 'tor-browser-gnu-linux-'+architecture+'-'+current_tbb_version+'-dev-'+language+'.tar.gz'
      tarball_path = download_dir+'/'+tarball_filename
      if os.path.exists(tarball_path):
        # already downloaded
        print 'Already downloaded'
      else:
        # launch downloader
        #tarball_url = 'https://www.torproject.org/dist/torbrowser/linux/'+tarball_filename
        tarball_url = 'http://127.0.0.1/'+tarball_filename




    self.timer = False

    self.current_tbb_version = current_tbb_version

    self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
    self.window.set_title("Tor Browser Launcher - First Run")
    self.window.set_border_width(10)
    
    self.window.connect("delete_event", self.delete_event)
    self.window.connect("destroy", self.destroy)

    self.box = gtk.VBox(False, 20)
    self.window.add(self.box)

    self.label = gtk.Label("The first time you run the Tor Browser Launcher you need to download the Tor Browser Bundle. Would you like to download it from the following URL now?")
    self.label.set_line_wrap(True)
    self.box.pack_start(self.label, True, True, 0)
    self.label.show()

    self.progressbar = gtk.ProgressBar(adjustment=None)
    self.progressbar.set_orientation(gtk.PROGRESS_LEFT_TO_RIGHT)
    self.box.pack_start(self.progressbar, True, True, 0)

    self.button_box = gtk.HButtonBox()
    self.button_box.set_layout(gtk.BUTTONBOX_SPREAD)
    self.box.pack_start(self.button_box, True, True, 0)
    self.button_box.show()

    self.download = gtk.Button("Download")
    self.download.connect("clicked", self.start_download, None)
    self.button_box.add(self.download)
    self.download.show()

    self.exit = gtk.Button("Exit")
    self.exit.connect("clicked", self.destroy, None)
    self.button_box.add(self.exit)
    self.exit.show()

    self.box.show()
    self.window.show();
  
  def delete_event(self, widget, event, data=None):
    return False
  
  def destroy(self, widget, data=None):
    if self.timer:
      gobject.source_remove(self.timer)
    self.timer = False

    gtk.main_quit()
   
  def start_download(self, widget, data=None):
    print 'Starting to download '+self.tarball_url

    # disable the download button
    self.download.set_sensitive(False)

    # initialize the progress bar
    self.progressbar.set_fraction(0) 
    self.progressbar.set_text('Downloaded 0%')
    self.progressbar.show()

    # start the download
    self.dl_response = urllib2.urlopen(self.tarball_url);
    
    self.dl_total_size = self.dl_response.info().getheader('Content-Length').strip()
    self.dl_total_size = int(self.dl_total_size)
    self.dl_bytes_so_far = 0

    # set a timer to download more chunks
    self.timer = gobject.timeout_add(1, download_chunk, self)

    # open a file to write to
    self.tarball_file = open(self.tarball_path, 'w')
      

  def main(self):
    gtk.main()

if __name__ == "__main__":
  print 'Tor Browser Launcher'
  print 'https://github.com/micahflee/torbrowser-launcher'

  current_tbb_version = '2.3.25-2'
  app = TorBrowserLauncher(current_tbb_version)
  app.main()