text: # -*- coding: utf-8 -*-
  
  '''
  The MIT License (MIT)
  
  Copyright (c) 2017 Wolfgang Almeida <wolfgang.almeida@yahoo.com>
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
  '''
  
  # Imports gerais
  # ==============
  from __future__ import print_function
  from PyQt4 import QtCore, QtGui
  from os.path import expanduser
  
  import os
  import sys
  import ctypes
  import platform
  import subprocess
  
  # Imports do programa
  # ===================
  from GlobalVars import GlobalVars
  from DownloaderClass import Downloader
  from ImageboardClass import Imageboard
  from ConfigLoaderClass import ConfigLoader
  from MessageBoxClass import ShowMessageBox
  
  # Definindo a codificação padrão para UTF-8.
  # ==========================================
  reload(sys)
  sys.setdefaultencoding('utf-8')
  
  # Determinando a pasta 'home' do usuário.
  # =======================================
  if platform.system() == "Windows":
      buf = ctypes.create_unicode_buffer(1024)
      ctypes.windll.kernel32.GetEnvironmentVariableW(u"USERPROFILE", buf, 1024)
      home_dir = buf.value
  else:
      home_dir = expanduser("~")
  
  # Classe do gerenciador da janela principal
  # =========================================
  class WindowHandler(object):
      # Inicializando objetos da classe
      # ===============================
      def __init__(self, ui, MainWindow):
          self.ui = ui
          self.MainWindow = MainWindow
          self.messageBox = ShowMessageBox()
          self.configBoards = ConfigLoader(GlobalVars.ConfigFilename)
          
          # Propriedades da classe
          # ----------------------
          self.chosenDir = ""
          self.chosenBoard = ""
          self.apiURL = ""
          self.imgURL = ""
          self.threadID = ""
          self.boardValue = ""
          self.saveOption = ""
          self.openChosenDirAfterDownload = False
          self.replaceFiles = False
          self.createSubFolder = False
          self.cancelDownload = False
  
      # Cancelando processo de download dos arquivos
      # ============================================
      def setCancel(self):
          self.cancelDownload = True
  
      # Método para selecionar pasta de destino.
      # ========================================
      def selectOutputDir(self):
          self.chosenDir = QtGui.QFileDialog.getExistingDirectory(self.MainWindow, 
              'Selecione a pasta de destino:', home_dir, QtGui.QFileDialog.ShowDirsOnly)
          
          if platform.system() == "Windows":
              self.ui.lineEdit_3.setText(self.chosenDir.replace("/", "\\"))
          else:
              self.ui.lineEdit_3.setText(self.chosenDir)
  
      # Resgatando valores da janela principal
      # ======================================
      def gatherUserValues(self):
          self.chosenBoard = str(self.ui.comboBox.currentText()).split(" - ", 1)[0].replace(" ", "")
          self.apiURL = self.configBoards.getImageBoardAPIURL(self.chosenBoard)
          self.imgURL = self.configBoards.getImageBoardImgURL(self.chosenBoard)
  
          self.threadID = self.ui.lineEdit.text()
          self.boardValue = self.ui.lineEdit_2.text().replace("/", "")
  
          self.saveOption = str(self.ui.comboBox_2.currentText())
          self.openChosenDirAfterDownload = self.ui.checkBox_3.isChecked()
          self.replaceFiles = self.ui.checkBox.isChecked()
          self.createSubFolder = self.ui.checkBox_2.isChecked()
  
          if self.checkUserValues():
              self.beginDownloadProcess()
  
      # Verificando os valores do usuário
      # =================================
      def checkUserValues(self):
          if self.threadID == "":
              self.messageBox.show(u"Aviso!", 
                  QtGui.QMessageBox.Warning, 
                  u"Falta a ID do tópico!", 
                  u"Insira a ID do tópico e tente novamente.",
                  QtGui.QMessageBox.Ok, 
                  0)
              return False
          elif self.boardValue == "":
              self.messageBox.show(u"Aviso!", 
                  QtGui.QMessageBox.Warning, 
                  u"Falta a board onde o tópico está!", 
                  u"Insira a board onde o tópico está e tente novamente.",
                  QtGui.QMessageBox.Ok, 
                  0)
              return False
          elif self.chosenDir == "":
              self.messageBox.show(u"Aviso!", 
                  QtGui.QMessageBox.Warning, 
                  u"Falta o caminho para a pasta de destino!", 
                  u"Insira o caminho para a pasta de destino e tente novamente.",
                  QtGui.QMessageBox.Ok, 
                  0)
              return False
          else:
              return True
  
      # Iniciando o processo de download dos arquivos do tópico
      # =======================================================
      def beginDownloadProcess(self):
          self.cancelDownload = False
          self.freezeProgramFields(True)
          self.apiURL = self.apiURL.format(self.boardValue, self.threadID)
  
          downloader = Downloader(self.chosenDir)
          downloader.replaceFiles = self.replaceFiles
          jsonData = downloader.getJson(self.apiURL)
  
          if jsonData != None:
              imgBoard = Imageboard(jsonData, self.imgURL, self.boardValue)
  
              if self.createSubFolder:
                  downloader.createSubFolder("%s-[%s]" % (imgBoard.threadName, self.threadID))
  
              # Iniciando processo de download!
              # -------------------------------
              self.ui.textEdit.clear()
              self.ui.textEdit.append(u"[Downloader] Iniciando Download dos Arquivos ...")
              self.ui.textEdit.append(u"--------------------------------------------------------------")
              self.ui.textEdit.append(u"[Info] Número total de posts: %s" % (imgBoard.postsNum))
              self.ui.textEdit.append(u"[Info] Número total de arquivos: %s" % (imgBoard.filesNum))
              self.ui.textEdit.append(u"[Info] Número de imagens: %s" % (imgBoard.imagesNum))
              self.ui.textEdit.append(u"[Info] Número de vídeos: %s" % (imgBoard.videosNum))
  
              if imgBoard.isArchived:
                  self.ui.textEdit.append(u"[Info] O tópico está arquivado!")
              self.ui.textEdit.append(u"--------------------------------------------------------------")
              self.ui.textEdit.append("\n===============================================\n")
              QtGui.QApplication.processEvents()
  
              if self.saveOption == "Apenas imagens":
                  self.downloadProcess(downloader, imgBoard.imageLinks, imgBoard.imagesSizeBytes, 
                      imgBoard.imagesSize, imgBoard.imagesNum)
              elif self.saveOption == "Apenas vídeos":
                  self.downloadProcess(downloader, imgBoard.videoLinks, imgBoard.videosSizeBytes, 
                      imgBoard.videosSize, imgBoard.videosNum)
              else:
                  self.downloadProcess(downloader, imgBoard.downloadLinks, imgBoard.filesSizeBytes, 
                      imgBoard.filesSize, imgBoard.filesNum)
  
              self.freezeProgramFields(False)
  
              self.ui.textEdit.append("\n===============================================\n")
              self.ui.textEdit.append(u"[Downloader] Processo de Download Finalizado!")
              QtGui.QApplication.processEvents()
              # --------------------------------
  
              if self.openChosenDirAfterDownload:
                  if platform.system() == "Windows":
                      os.startfile(self.chosenDir)
                  else:
                      try:
                          subprocess.Popen(["xdg-open", "%s" % (self.chosenDir)])
                      except Exception:
                          pass
          else:
              self.freezeProgramFields(False)
  
      # Baixando arquivos
      # =================
      def downloadProcess(self, downloader, fLinksList, fSizeBytesList, fSizeList, fTotal):
          counter = 0
          for i in fLinksList:
              if self.cancelDownload:
                  self.ui.textEdit.append(u"--------------------------------------------------------------")
                  self.ui.textEdit.append(u"[Downloader] Processo de Download cancelado!")
                  QtGui.QApplication.processEvents()
                  break
  
              fName = os.path.basename(i)
              status = downloader.downloadFile(i, fName, fSizeBytesList[counter])
              if status == 0:
                  self.ui.textEdit.append(u"[Download] Arquivo: '%s' --//-- Tamanho: %s --//-- [%d/%d]" % (fName, 
                      fSizeList[counter], counter + 1, fTotal))
                  QtGui.QApplication.processEvents()
              elif status == 1:
                  self.ui.textEdit.append(u"[Download] Arquivo: '%s' --//-- Erro ao baixar arquivo! Pulando... [%d/%d]" % (fName, 
                      counter + 1, fTotal))
                  QtGui.QApplication.processEvents()
              elif status == 2:
                  self.ui.textEdit.append(u"[Download] Arquivo: '%s' --//-- Arquivo já existe! Pulando... [%d/%d]" % (fName, 
                      counter + 1, fTotal))
                  QtGui.QApplication.processEvents()
              
              counter += 1
      
      # Congelando as opções do programa durante o início do processo de cálculo
      # ========================================================================
      def freezeProgramFields(self, freeze):
          if freeze:
              self.ui.pushButton.setEnabled(False)
              self.ui.pushButton_2.setEnabled(True)
              self.ui.toolButton.setEnabled(False)
              self.ui.textEdit.clear()
              self.ui.progressBar.setProperty("value", 0)
              QtGui.QApplication.processEvents()
          else:
              self.ui.pushButton.setEnabled(True)
              self.ui.pushButton_2.setEnabled(False)
              self.ui.toolButton.setEnabled(True)
              QtGui.QApplication.processEvents()