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

from qgis.core import *
from qgis.gui import *

from osgeo import ogr

from ui_widgetProximity import Ui_GdalToolsWidget as Ui_Widget
from widgetPluginBase import GdalToolsBasePluginWidget as BasePluginWidget
import GdalTools_utils as Utils

class GdalToolsDialog(QWidget, Ui_Widget, BasePluginWidget):

  def __init__(self, iface):
      QWidget.__init__(self)
      self.iface = iface

      self.setupUi(self)
      BasePluginWidget.__init__(self, self.iface, "gdal_proximity.py")

      self.outSelector.setType( self.outSelector.FILE )
      self.outputFormat = Utils.fillRasterOutputFormat()

      self.setParamsStatus(
        [
          (self.inSelector, SIGNAL("filenameChanged()")),
          (self.outSelector, SIGNAL("filenameChanged()")),
          (self.valuesEdit, SIGNAL("textChanged(const QString &)"), self.valuesCheck),
          (self.distUnitsCombo, SIGNAL("currentIndexChanged(int)"), self.distUnitsCheck),
          (self.maxDistSpin, SIGNAL("valueChanged(int)"), self.maxDistCheck),
          (self.noDataSpin, SIGNAL("valueChanged(int)"), self.noDataCheck),
          (self.fixedBufValSpin, SIGNAL("valueChanged(int)"), self.fixedBufValCheck)
        ]
      )

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

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

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

      self.inSelector.setFilename(inputFile)

  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 getArguments(self):
      arguments = QStringList()
      arguments << self.getInputFileName()
      outputFn = self.getOutputFileName()
      arguments << outputFn
      if self.valuesCheck.isChecked():
        values = self.valuesEdit.text().trimmed()
        if not values.isEmpty():
          arguments << "-values"
          arguments << values.replace(' ', ',')
      if self.distUnitsCheck.isChecked() and self.distUnitsCombo.currentIndex() >= 0:
        arguments << "-distunits"
        arguments << self.distUnitsCombo.currentText()
      if self.maxDistCheck.isChecked():
        arguments << "-maxdist"
        arguments << str(self.maxDistSpin.value())
      if self.noDataCheck.isChecked():
        arguments << "-nodata"
        arguments << str(self.noDataSpin.value())
      if self.fixedBufValCheck.isChecked():
        arguments << "-fixed-buf-val"
        arguments << str(self.fixedBufValSpin.value())
      if not outputFn.isEmpty():
        arguments << "-of"
        arguments << self.outputFormat
      return arguments

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

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

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