# -*- mode:Python -*-
#
# This file is part of the Coriolis Software.
# Copyright (c) UPMC/LIP6 2012-2018, All Rights Reserved
#
# +-----------------------------------------------------------------+ 
# |                   C O R I O L I S                               |
# |    C o r i o l i s  /  C h a m s   B u i l d e r                |
# |                                                                 |
# |  Author      :                       Damien Dupuis              |
# |  E-mail      :       Jean-Paul.Chaput@asim.lip6.fr              |
# | =============================================================== |
# |  Python      :   "./builder/ConfigureWidget.py"                 |
# +-----------------------------------------------------------------+


from   PyQt4.QtCore   import Qt
from   PyQt4.QtCore   import QVariant
from   PyQt4.QtCore   import pyqtSignal
from   PyQt4.QtCore   import QSettings
from   PyQt4.QtGui    import QFont
from   PyQt4.QtGui    import QWidget
from   PyQt4.QtGui    import QGridLayout
from   PyQt4.QtGui    import QHBoxLayout
from   PyQt4.QtGui    import QVBoxLayout
from   PyQt4.QtGui    import QLabel
from   PyQt4.QtGui    import QPushButton
from   PyQt4.QtGui    import QLineEdit
from   PyQt4.QtCore   import QModelIndex
from   PyQt4.QtCore   import QAbstractTableModel
from   PyQt4.QtGui    import QAbstractItemView
from   PyQt4.QtGui    import QHeaderView
from   PyQt4.QtGui    import QTableView
from   PyQt4.QtGui    import QGroupBox
from   PyQt4.QtGui    import QFileDialog
from   PyQt4.QtGui    import QApplication
from   Configuration  import Configuration


class ConfSettingsModel ( QAbstractTableModel ):

    HeaderFont = QApplication.font()
    PrimaryFont   = QFont('Courier',HeaderFont.pointSize()-2,QFont.Normal)
    SecondaryFont = QFont('Courier',HeaderFont.pointSize()-2,QFont.Normal)
    ValueFont     = QFont('Courier',HeaderFont.pointSize()-2,QFont.Bold)

    def __init__ ( self, conf, parent=None ):
        ConfSettingsModel.HeaderFont.setBold( True )
        ConfSettingsModel.SecondaryFont.setItalic( True )

        QAbstractTableModel.__init__( self, parent )
        self._conf = conf
        self._ids  = self._conf.getAllIds()
        return

    def data ( self, index, role ):
        if role == Qt.SizeHintRole:
            if index.column() == 0: return 300
            else:                   return -1
        elif role == Qt.FontRole:
            if index.column() == 0:
                if index.row() >= len(self._conf.getPrimaryIds()):
                    return ConfSettingsModel.SecondaryFont
                return ConfSettingsModel.PrimaryFont
            else:
                return ConfSettingsModel.ValueFont
        elif role == Qt.DisplayRole:
            row = index.row()
            if row < self.rowCount():
                if   index.column() == 0: return self._ids[row]
                elif index.column() == 1: return getattr( self._conf, self._ids[row] )

        return QVariant()


    def headerData ( self, section, orientation, role ):
        if orientation == Qt.Vertical: return QVariant()
        if role == Qt.FontRole:        return ConfSettingsModel.HeaderFont
        if role != Qt.DisplayRole:     return QVariant()

        if   section == 0: return 'Setting'
        elif section == 1: return 'Value'

        return QVariant('?')


    def rowCount    ( self, index=QModelIndex() ): return len(self._ids)
    def columnCount ( self, index=QModelIndex() ): return 2


class ConfSettingsWidget ( QWidget ):

    def __init__ ( self, conf, parent=None ):
        QWidget.__init__( self, parent )
        self._rowHeight = 20

        self._view = QTableView()
        self._view.setShowGrid            ( False )
        self._view.setAlternatingRowColors( True )
        self._view.setSelectionBehavior   ( QAbstractItemView.SelectRows )
       #self._view.setSortingEnabled      ( True )
       #self._view.installEventFilter     ( self )

        horizontalHeader = self._view.horizontalHeader ()
        horizontalHeader.setStretchLastSection ( True )
        horizontalHeader.setMinimumSectionSize ( 150 )
        horizontalHeader.setResizeMode         ( QHeaderView.ResizeToContents )
        horizontalHeader.setDefaultSectionSize ( 150 )

        verticalHeader = self._view.verticalHeader ();
        verticalHeader.setVisible ( False );
        verticalHeader.setDefaultSectionSize ( self._rowHeight );

        self._baseModel = ConfSettingsModel( conf )
        self._view.setModel( self._baseModel );
        self._view.horizontalHeader().setStretchLastSection( True );
        self._view.resizeColumnToContents( 0 );

        peanoDataLayout = QGridLayout();
        peanoDataLayout.addWidget( self._view, 0, 0, 1, 1 );

        self.setLayout ( peanoDataLayout );
        return


class ConfigureWidget ( QWidget ):

  def __init__ ( self, confFile, parent=None ):
    QWidget.__init__ ( self, parent )
    self._confFile = confFile
    self._conf     = Configuration()
    self._rootDir  = ''

    rootDirLabel  = QLabel( 'Root Directory' )
    rootDirBrowse = QPushButton( '&Browse' )
    rootDirBrowse.clicked.connect( self.browseRootDir )
    self._rootDirEdit = QLineEdit( '' )
   #self._rootDirEdit.setFixedWidth( 600 )

    gLayout = QGridLayout()
    gLayout.addWidget( rootDirLabel     , 0, 0, 1, 1 )
    gLayout.addWidget( self._rootDirEdit, 0, 1, 1, 6 )
    gLayout.addWidget( rootDirBrowse    , 0, 7, 1, 1 )
    groupDirs = QGroupBox( 'Directories' )
    groupDirs.setLayout( gLayout )

    gLayout = QGridLayout()
    groupConf = QGroupBox( 'Configuration' )
    groupConf.setLayout( gLayout )

    vLayout = QVBoxLayout()
    vLayout.addWidget ( groupDirs )
    vLayout.addWidget ( groupConf )
   #vLayout.addStretch()

    self.setLayout( vLayout )

    self._rootDirEdit.textChanged.connect( self.rootDirChanged )

    self.readSettings()

    noteLabel = QLabel( 'Those settings can be changed only by editing build.conf' )
    gLayout.addWidget( noteLabel                     , 0, 0, 1, 1 )
    gLayout.addWidget( ConfSettingsWidget(self._conf), 1, 0, 1, 1 )


  def _getConf         ( self ): return self._conf
  def _getRootDir      ( self ): return self._rootDir
  def _getBootstrapDir ( self ): return self._getConf().bootstrapDir

  conf         = property( _getConf )
  rootDir      = property( _getRootDir )
  bootstrapDir = property( _getBootstrapDir )


  def rootDirChanged ( self, rootDir ):
    self._rootDir = rootDir
    return

  def browseRootDir ( self ):
    self._rootDirEdit.setText( QFileDialog.getExistingDirectory(self,'Select the Building Root Directory') )
    return

  def readSettings ( self ):
    settings = QSettings()
    self._rootDirEdit.setText( settings.value('conf/rootDir').toString() )
    if not self._confFile and settings.value('conf/confFile'):
        self._confFile = str( settings.value('conf/confFile').toString() )
    self._conf.load( self._confFile )
    return

  def saveSettings ( self ):
    settings = QSettings()
    settings.setValue( 'conf/rootDir' , self._rootDirEdit.text() )
    settings.setValue( 'conf/confFile', self._confFile )
    return