# -*- coding: utf-8 -*-
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from qgis.core import *
from qgis.gui import *

from ui_widgetTranslate import Ui_GdalToolsWidget as Ui_Widget
from widgetBatchBase import GdalToolsBaseBatchWidget as BaseBatchWidget
from dialogSRS import GdalToolsSRSDialog as SRSDialog
import GdalTools_utils as Utils

class GdalToolsDialog(QWidget, Ui_Widget, BaseBatchWidget):

  def __init__(self, iface):
      QWidget.__init__(self)
      self.iface = iface
      self.canvas = self.iface.mapCanvas()
      self.expand_method = ( 'gray', 'rgb', 'rgba' )

      self.setupUi(self)
      BaseBatchWidget.__init__(self, self.iface, "gdal_translate")

      self.outSelector.setType( self.outSelector.FILE )

      # set the default QSpinBoxes and QProgressBar value
      self.outsizeSpin.setValue(25)
      self.progressBar.setValue(0)

      self.progressBar.hide()
      self.formatLabel.hide()
      self.formatCombo.hide()

      if Utils.Version( Utils.GdalConfig.version() ) < "1.7":
        index = self.expandCombo.findText('gray', Qt.MatchFixedString)
        if index >= 0:
          self.expandCombo.removeItem(index)

      self.outputFormat = Utils.fillRasterOutputFormat()

      self.setParamsStatus(
        [
          (self.inSelector, SIGNAL("filenameChanged()")),
          (self.outSelector, SIGNAL("filenameChanged()")),
          (self.targetSRSEdit, SIGNAL("textChanged(const QString &)"), self.targetSRSCheck),
          (self.selectTargetSRSButton, None, self.targetSRSCheck),
          (self.creationOptionsTable, [SIGNAL("cellValueChanged(int, int)"), SIGNAL("rowRemoved()")], self.creationGroupBox),
          (self.outsizeSpin, SIGNAL("valueChanged(const QString &)"), self.outsizeCheck),
          (self.nodataSpin, SIGNAL("valueChanged(int)"), self.nodataCheck),
          (self.expandCombo, SIGNAL("currentIndexChanged(int)"), self.expandCheck, "1.6.0"),
          (self.sdsCheck, SIGNAL("stateChanged(int)")),
          (self.srcwinEdit, SIGNAL("textChanged(const QString &)"), self.srcwinCheck),
          (self.prjwinEdit, SIGNAL("textChanged(const QString &)"), self.prjwinCheck)
        ]
      )

      #self.connect(self.canvas, SIGNAL("layersChanged()"), self.fillInputLayerCombo)
      self.connect(self.inSelector, SIGNAL("layerChanged()"), self.fillTargetSRSEditDefault)
      self.connect( self.inSelector, SIGNAL( "selectClicked()" ), self.fillInputFile )
      self.connect(self.outSelector, SIGNAL("selectClicked()"), self.fillOutputFileEdit)
      self.connect(self.selectTargetSRSButton, SIGNAL("clicked()"), self.fillTargetSRSEdit)
      self.connect( self.batchCheck, SIGNAL( "stateChanged( int )" ), self.switchToolMode )

      # add raster filters to combo
      self.formatCombo.addItems( Utils.FileFilter.allRastersFilter().split( ";;" ) )


  def switchToolMode( self ):
      self.setCommandViewerEnabled( not self.batchCheck.isChecked() )
      self.progressBar.setVisible( self.batchCheck.isChecked() )
      self.formatLabel.setVisible( self.batchCheck.isChecked() )
      self.formatCombo.setVisible( self.batchCheck.isChecked() )

      self.inSelector.setType( self.inSelector.FILE if self.batchCheck.isChecked() else self.inSelector.FILE_LAYER )
      self.outSelector.clear()

      if self.batchCheck.isChecked():
        self.inFileLabel = self.label_3.text()
        self.outFileLabel = self.label_2.text()
        self.label_3.setText( QCoreApplication.translate( "GdalTools", "&Input directory" ) )
        self.label_2.setText( QCoreApplication.translate( "GdalTools", "&Output directory" ) )

        QObject.disconnect( self.inSelector, SIGNAL( "selectClicked()" ), self.fillInputFile )
        QObject.disconnect( self.outSelector, SIGNAL( "selectClicked()" ), self.fillOutputFileEdit )

        QObject.connect( self.inSelector, SIGNAL( "selectClicked()" ), self. fillInputDir )
        QObject.connect( self.outSelector, SIGNAL( "selectClicked()" ), self.fillOutputDir )
      else:
        self.label_3.setText( self.inFileLabel )
        self.label_2.setText( self.outFileLabel )

        QObject.disconnect( self.inSelector, SIGNAL( "selectClicked()" ), self.fillInputDir )
        QObject.disconnect( self.outSelector, SIGNAL( "selectClicked()" ), self.fillOutputDir )

        QObject.connect( self.inSelector, SIGNAL( "selectClicked()" ), self.fillInputFile )
        QObject.connect( self.outSelector, SIGNAL( "selectClicked()" ), self.fillOutputFileEdit )

  def onLayersChanged(self):
      self.inSelector.setLayers( Utils.LayerRegistry.instance().getRasterLayers() )

  def fillInputFile( self ):
      lastUsedFilter = Utils.FileFilter.lastUsedRasterFilter()
      inputFile = Utils.FileDialog.getOpenFileName( self, self.tr( "Select the input file for Translate" ), Utils.FileFilter.allRastersFilter(), lastUsedFilter )
      if inputFile.isEmpty():
        return
      Utils.FileFilter.setLastUsedRasterFilter( lastUsedFilter )

      self.inSelector.setFilename( inputFile )

      # get SRS for target file if necessary and possible
      self.refreshTargetSRS()

  def fillInputDir( self ):
      inputDir = Utils.FileDialog.getExistingDirectory( self, self.tr( "Select the input directory with files to Translate" ))
      if inputDir.isEmpty():
        return
      self.inSelector.setFilename( inputDir )

      filter = Utils.getRasterExtensions()
      workDir = QDir( inputDir )
      workDir.setFilter( QDir.Files | QDir.NoSymLinks | QDir.NoDotAndDotDot )
      workDir.setNameFilters( filter )

      # search for a valid SRS, then use it as default target SRS
      srs = QString()
      for fname in workDir.entryList():
        fl = inputDir + "/" + fname
        srs = Utils.getRasterSRS( self, fl )
        if not srs.isEmpty():
          break
      self.targetSRSEdit.setText( srs )


  def fillOutputFileEdit(self):
      lastUsedFilter = Utils.FileFilter.lastUsedRasterFilter()
      outputFile = Utils.FileDialog.getSaveFileName(self, self.tr( "Select the raster file to save the results to" ), Utils.FileFilter.allRastersFilter(), lastUsedFilter )
      if outputFile.isEmpty():
        return
      Utils.FileFilter.setLastUsedRasterFilter(lastUsedFilter)

      self.outputFormat = Utils.fillRasterOutputFormat(lastUsedFilter, outputFile)
      self.outSelector.setFilename(outputFile)

  def fillOutputDir( self ):
      outputDir = Utils.FileDialog.getExistingDirectory( self, self.tr( "Select the output directory to save the results to" ) )
      if outputDir.isEmpty():
        return
      self.outSelector.setFilename( outputDir )

  def fillTargetSRSEditDefault(self):
      if self.inSelector.layer() == None:
        return
      self.refreshTargetSRS()

  def refreshTargetSRS(self):
      self.targetSRSEdit.setText( Utils.getRasterSRS( self, self.getInputFileName() ) )

  def fillTargetSRSEdit(self):
      dialog = SRSDialog( "Select the target SRS", self )
      if dialog.exec_():
        self.targetSRSEdit.setText(dialog.getProjection())

  def getArguments(self):
      arguments = QStringList()
      if self.targetSRSCheck.isChecked() and not self.targetSRSEdit.text().isEmpty():
        arguments << "-a_srs"
        arguments << self.targetSRSEdit.text()
      if self.creationGroupBox.isChecked():
        for opt in self.creationOptionsTable.options():
          arguments << "-co"
          arguments << opt
      if self.outsizeCheck.isChecked() and self.outsizeSpin.value() != 100:
          arguments << "-outsize"
          arguments << self.outsizeSpin.text()
          arguments << self.outsizeSpin.text()
      if self.expandCheck.isChecked():
          arguments << "-expand"
          arguments << self.expand_method[self.expandCombo.currentIndex()]
      if self.nodataCheck.isChecked():
          arguments << "-a_nodata"
          arguments << str(self.nodataSpin.value())
      if self.sdsCheck.isChecked():
          arguments << "-sds"
      if self.srcwinCheck.isChecked() and not self.srcwinEdit.text().isEmpty():
          coordList = self.srcwinEdit.text().split( ' ', QString.SkipEmptyParts )
          if len(coordList) == 4 and not coordList[3].isEmpty():
              try:
                  for x in coordList:
                      test = int(x)
              except ValueError:
                  #print "Coordinates must be integer numbers."
                  QMessageBox.critical(self, self.tr("Translate - srcwin"), self.tr("Image coordinates (pixels) must be integer numbers."))
              else:
                  arguments << "-srcwin"
                  for x in coordList:
                      arguments << x
      if self.prjwinCheck.isChecked() and not self.prjwinEdit.text().isEmpty():
          coordList = self.prjwinEdit.text().split( ' ', QString.SkipEmptyParts )
          if len(coordList) == 4 and not coordList[3].isEmpty():
              try:
                  for x in coordList:
                      test = float(x)
              except ValueError:
                  #print "Coordinates must be integer numbers."
                  QMessageBox.critical(self, self.tr("Translate - prjwin"), self.tr("Image coordinates (geographic) must be numbers."))
              else:
                  arguments << "-projwin"
                  for x in coordList:
                    arguments << x
      if self.isBatchEnabled():
        if self.formatCombo.currentIndex() != 0:
          arguments << "-of"
          arguments << Utils.fillRasterOutputFormat( self.formatCombo.currentText() )
          return arguments
        else:
          return arguments

      outputFn = self.getOutputFileName()
      if not outputFn.isEmpty():
        arguments << "-of"
        arguments << self.outputFormat
      arguments << self.getInputFileName()
      arguments << outputFn
      return arguments

  def getInputFileName(self):
      return self.inSelector.filename()

  def getOutputFileName(self):
      return self.outSelector.filename()

  def addLayerIntoCanvas(self, fileInfo):
      self.iface.addRasterLayer(fileInfo.filePath())

  def isBatchEnabled(self):
      return self.batchCheck.isChecked()

  def setProgressRange(self, maximum):
      self.progressBar.setRange(0, maximum)

  def updateProgress(self, index, total):
      if index < total:
        self.progressBar.setValue( index + 1 )
      else:
        self.progressBar.setValue( 0 )

  def batchRun(self):
      exts = self.formatCombo.currentText().remove( QRegExp('^.*\(') ).remove( QRegExp('\).*$') ).split( " " )
      if not exts.isEmpty() and exts != "*" and exts != "*.*":
        outExt = exts[ 0 ].remove( "*" )
      else:
        outExt = ".tif"

      self.base.enableRun( False )
      self.base.setCursor( Qt.WaitCursor )

      inDir = self.getInputFileName()
      outDir = self.getOutputFileName()

      filter = Utils.getRasterExtensions()
      workDir = QDir( inDir )
      workDir.setFilter( QDir.Files | QDir.NoSymLinks | QDir.NoDotAndDotDot )
      workDir.setNameFilters( filter )
      files = workDir.entryList()

      self.inFiles = []
      self.outFiles = []

      for f in files:
        self.inFiles.append( inDir + "/" + f )
        if outDir != None:
          outFile = f.replace( QRegExp( "\.[a-zA-Z0-9]{2,4}" ), outExt )
          self.outFiles.append( outDir + "/" + outFile )

      self.errors = QStringList()
      self.batchIndex = 0
      self.batchTotal = len( self.inFiles )
      self.setProgressRange( self.batchTotal )

      self.runItem( self.batchIndex, self.batchTotal )
