"""
     qtgui/CCP4AnnotationWidgets.py: CCP4 Gui Project
     Copyright (C) 2016 STFC

     This library is free software: you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public License
     version 3, modified in accordance with the provisions of the 
     license to address the requirements of UK law.
 
     You should have received a copy of the modified GNU Lesser General 
     Public License along with this library.  If not, copies may be 
     downloaded from http://www.ccp4.ac.uk/ccp4license.php
 
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU Lesser General Public License for more details.
"""
from PyQt4 import QtCore,QtGui
from CCP4Modules import *
from CCP4ErrorHandling import *
import CCP4Annotation
import CCP4Widgets


class CAnnotationView(CCP4Widgets.CComplexLineWidget):

    MODEL_CLASS = CCP4Annotation.CAnnotation
    STRETCH = 5

    def __init__(self,parent=None,model=None,qualifiers={}):
      qualis = {'charWidth': -1}
      qualis.update(qualifiers)
      ifMultiLine = qualis.get('multiLine',False)
      if ifMultiLine: qualis['gridLayout'] = True
      CCP4Widgets.CComplexLineWidget.__init__(self,parent,qualis)
      if self.editable:
        if ifMultiLine:
          self.lineEdit = CCP4Widgets.CTextEdit(self)
          self.layout().addWidget(self.lineEdit,1,0,1,2)
          if qualis.get('title',None) is not None:
            self.layout().addWidget(CCP4Widgets.CItalicLabel(qualis['title'],self),0,1)
        else:
          self.lineEdit = CCP4Widgets.CLineEdit(self,{'charWidth':qualis['charWidth'] } )
          self.layout().addWidget(self.lineEdit)
          self.layout().setStretchFactor(self.lineEdit,5)
        self.connect(self.lineEdit,QtCore.SIGNAL(self.lineEdit.editSignal()),self.updateModelFromView)
      else:
        if ifMultiLine:
          if qualis.get('title',None) is not None:
            self.layout().addWidget(CCP4Widgets.CItalicLabel(qualis['title'],self),0,1)
          self.lineEdit =CTextEdit(self)
          self.lineEdit.setReadOnly(True)
          self.layout().addWidget(self.lineEdit,1,0,1,2)
        else:
          self.lineEdit = CCP4Widgets.CLabel(self,{'charWidth':qualis['charWidth'] })
          self.layout().addWidget(self.lineEdit)
          self.layout().setStretchFactor(self.lineEdit,5)
      if model is not None: self.setModel(model)

    def sizePolicy(self):
      #print 'using CAnnotationView.sizePolicy'
      return QtGui.QSizePolicy.MinimumExpanding
   
    def handleEdit(self):
        self.emit(QtCore.SIGNAL('textChanged'))
 
    def getMenuDef(self):
      return ['copy','paste','help']


    def updateViewFromModel(self):
      if self.model is None: return
      text = self.model.text.get()
      #print 'CAnnotationView.updateViewFromModel',text
      self.lineEdit.blockSignals(True)
      self.lineEdit.setValue(text)
      self.lineEdit.blockSignals(False)

    def updateModelFromView(self,**kw):
      if self.model is None: return
      value = { 'text' : self.lineEdit.getValue() }
      #print 'CAnnotationView.updateModelFromView',value
      self.connectUpdateViewFromModel(False)
      self.model.set(value=value)
      self.connectUpdateViewFromModel(True)
      
    def updateModelFromText(self):
      self.updateModelFromView()

class CTimeView(CCP4Widgets.CViewWidget):

  MODEL_CLASS = CCP4Annotation.CTime
  
  def __init__(self,parent=None,model=None,qualifiers={}):
    qualis = qualifiers
    CCP4Widgets.CViewWidget.__init__(self,parent,qualifiers=qualis)

    layout = QtGui.QHBoxLayout()
    layout.setSpacing(CViewWidget.MARGIN)
    layout.setContentsMargins(CViewWidget.MARGIN,CViewWidget.MARGIN,CViewWidget.MARGIN,CViewWidget.MARGIN)
    self.setLayout(layout)
    if self.editable:
      self.widget = QtGui.QDateEdit(self)
      self.connect(self.widget, QtCore.SIGNAL('dateTimeChanged(const QDateTime &)'),self.updateModelFromView1)
    else:
      self.widget = CLabel(self)
    self.layout().addWidget(self.widget)
    #print 'CTimeView.__init__',self.layout().count()

    self.setModel(model)

  def setValue(self,value=None):
    t = QtCore.QDateTime()
    t.setTime_t(value)
    if self.editable:
      self.widget.setDateTime(t)
    else:
      self.widget.setValue(str(t.toString()))

  def getValue(self):
    return  self.widget.dateTime().toTime_t()

  def updateViewFromModel(self):
    self.widget.blockSignals(True)
    self.widget.setDateTime(self.model.QDateTime)
    self.widget.blockSignals(False)

  def updateModelFromView1(self,date):
    self.updateModelFromView()

  def updateModelFromView(self):
    self.connectUpdateViewFromModel(False)
    self.model.QDateTime = self.widget.dateTime()
    self.connectUpdateViewFromModel(True)


class CMetaDataTagView(CCP4Widgets.CComplexLineWidget):

  MODEL_CLASS = CCP4Annotation.CMetaDataTag
    
  def __init__(self,parent=None,model=None,qualifiers={}):
    CCP4Widgets.CComplexLineWidget.__init__(self,parent=parent,qualifiers=qualifiers)
    self.widgets['tag'] = CCP4Widgets.CComboBox(self)
    self.layout().addWidget(self.widgets['tag'])
    self.setModel(model)

  def setModel(self,model):
    #print 'CMetaDataTagView.setModel',model
    #try:
    #  print 'CMetaDataTagView.setModel',model.parent().__dict__['_value'],repr(model)
    #except:
    #  pass
    # These only need connecting on first call to setModel() - if this is a list editor then
    # likely to be called multiple times
    if self.model is not None:
      self.disconnect(self.model,QtCore.SIGNAL('enumeratorsUpdated'),self.updateCombo)
    if self.model is None and model is not None:
      self.connect(self.widgets['tag'],QtCore.SIGNAL('dataChanged'),self.updateTag)
      self.connect(self.widgets['tag'],QtCore.SIGNAL('returnPressed'),self.handleReturn)
      self.connect(self.widgets['tag'],QtCore.SIGNAL('focusOut'),self.handleReturn)
    CComplexLineWidget.setModel(self,model)
    if self.model is not None:
      self.updateCombo()
      self.connect(self.model,QtCore.SIGNAL('enumeratorsUpdated'),self.updateCombo)

  def handleReturn(self):
    #print 'CMetaDataTagView.handleReturn',self.widgets['tag'].currentText()
    # addEnumerator() creates new tag if necessary and return index of the tag
    idx = self.model.addEnumerator(str(self.widgets['tag'].currentText()))
    import CCP4I1Projects
    #print 'CMetaDataTagView.handleReturn',CCP4I1Projects.CI1PREFERENCES().tagList
    #print 'CMetaDataTagView.handleReturn idx',idx
    if idx>=0:
      self.updateCombo()
      self.widgets['tag'].setCurrentIndex(idx)
    self.updateTag()

  def updateTag(self):
    #print 'updateTag ',self.widgets['tag'].getValue()
    self.model.tag.set( self.widgets['tag'].getValue(),checkValidity=False)
    
  def updateCombo(self):
    self.widgets['tag'].populate(self.model.getEnumerators())


class CMetaDataTagListView(CCP4Widgets.CListView):

  MODEL_CLASS = CCP4Annotation.CMetaDataTagList

  def __init__(self,parent=None,model=None,qualifiers={},editorQualifiers={}):
    qualis = { 'mode' : 'list' }
    qualis.update(qualifiers)
    CCP4Widgets.CListView.__init__(self,parent=parent,model=model,qualifiers=qualis,editorQualifiers=editorQualifiers)
    self.connect(self.editor,QtCore.SIGNAL('dataChanged'),self.populateListWidget)

  def updateCombo(self):
    self.editor.widget.updateCombo()

   
class CDateRangeView(CCP4Widgets.CComplexLineWidget):
    
  MODEL_CLASS = CCP4Annotation.CDateRange
    
  def __init__(self,parent=None,model=None,qualifiers={}):
    qualis = {}
    qualis.update(qualifiers)
    CCP4Widgets.CComplexLineWidget.__init__(self,parent=parent,qualifiers=qualis)
    self.layout().setSpacing(1)
    for item in [ 'year', 'month', 'day']:
      self.widgets[item] = CCP4Widgets.CComboBox(parent=self,qualifiers=qualis)
      self.layout().addWidget(self.widgets[item])
    self.layout().addWidget(QtGui.QLabel('+/-',self))
    self.widgets['year'].setMaximumWidth(QtGui.QFontMetrics(self.widgets['year'].font()).width('2222')+30)
    self.widgets['month'].setMaximumWidth(QtGui.QFontMetrics(self.widgets['month'].font()).width('September')+30)
    self.widgets['day'].setMaximumWidth(QtGui.QFontMetrics(self.widgets['day'].font()).width('28')+30)
    self.connect(self.widgets['month'],QtCore.SIGNAL('currentIndexChanged(int)'),self.updateDayCombo)
    for item in [ 'yearRange', 'monthRange', 'dayRange']:
      self.widgets[item] = CCP4Widgets.CIntView(parent=self,qualifiers=qualis)
      self.widgets[item].setMaximumWidth(QtGui.QFontMetrics(self.widgets[item].font()).width('9999'))
      self.layout().addWidget(self.widgets[item])
      self.layout().addWidget(QtGui.QLabel(item[0:-5]+'s',self))
    self.setModel(model)

  def setModel(self,model=None):
    CCP4Widgets.CComplexLineWidget.setModel(self,model=model)
    if model is None: return
    self.widgets['year'].populate(model.year.qualifiers('enumerators'))
    self.widgets['month'].populate(['']+model.month.qualifiers('enumerators'))
    self.widgets['day'].populate([' ']+model.day.qualifiers('enumerators'))
    self.updateViewFromModel()
    self.updateDayCombo(self.widgets['month'].currentIndex())

  def updateDayCombo(self,monthIndex):
    menu = ['']
    if monthIndex >0:
      for item in range(1,self.model.MONTHLENGTH[monthIndex]+1): menu.append(item)
    self.widgets['day'].populate(menu)
    
  #Reimplement getValue()/setValue() to convert a data value of None to zero length string
  
  def setValue(self,value=None):
    #print 'CDateRangeView.setValue',value
    if self.blockUpdateView: return
    if value is None: return
    for item,w in  self.widgets.items():
      w.blockSignals(True)
      if value[item] is None:
        w.setValue('')
      else:
        w.setValue(value[item])
      w.blockSignals(False)
    self.lastWarning = None

  def getValue(self):
    data = {}
    for item,w in self.widgets.items():
      w = self.widgets.get(item,None)
      data[item] = w.getValue()
      if len( data[item]) ==0:  data[item]=None
    #print 'CDateRangeView.getValue',data
    return data