from PyQt4.QtCore import *
from PyQt4.QtGui import *

from sface.config import config
from sface.screens.sfascreen import SfaScreen

class ConfigWidget(QWidget):
    def __init__(self, parent):
        QWidget.__init__(self, parent)

        glayout = QGridLayout()
        row = 0
        for (field,msg) in config.field_labels():
            # edit : text or checkbox
            default=config.field_default(field)
            if isinstance(default,bool):
                edit=QCheckBox(msg)
                if config.is_true(config.get(field)):
                    edit.setCheckState(Qt.Checked)
            else:
                edit=QLineEdit(config.get(field) or "", self)
                edit.setAttribute(Qt.WA_MacShowFocusRect, 0)
            setattr(self,field,edit)

            glayout.addWidget(QLabel(msg+":",self), row, 0)
            glayout.addWidget(edit, row, 1)

            row += 1

        hlayout = QHBoxLayout()
        hlayout.addStretch()
        for (action,label) in [('apply','Apply'),
                               ('save','Apply && Save')]:
            button=QPushButton(label, self)
            button.setSizePolicy(QSizePolicy.Maximum, QSizePolicy.Maximum)
            hlayout.addWidget(button, 0, Qt.AlignRight)
            hlayout.addSpacing(10)
            self.connect(button, SIGNAL('clicked()'), getattr(self,action))

        layout = QVBoxLayout()
        layout.addLayout(glayout)
        layout.addLayout(hlayout)
        layout.addStretch()
        self.setLayout(layout)


    def apply(self):
        for field in config.fields():
            widget=getattr(self,field)
            if isinstance(widget,QCheckBox):
                if widget.checkState() == Qt.Checked:
                    config.set(field, True)
                else:
                    config.set(field, False)
            else:
                config.set(field, str(widget.text()))

        self.parent().setStatus("<font color='green'>Settings loaded for current session</font>", timeout=5000)
        config.display("after apply")

        self.parent().signalAll('configurationChanged')


    def save(self):
        self.apply()
        config.save_config()
        self.parent().setStatus("<font color='green'>Configuration saved in %s !</font>"%config.filename(), timeout=5000)

class ConfigScreen(SfaScreen):
    def __init__(self, parent):
        SfaScreen.__init__(self, parent)
        
        widget = ConfigWidget(self)
        self.init(widget, "Configure", "Configure the OneLab Federation GUI")