from PyQt4.QtCore import SIGNAL, Qt
from PyQt4.QtGui import QWidget, QLabel, QLineEdit, QPushButton, QCheckBox, QVBoxLayout, QSizePolicy

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

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

        layout = QVBoxLayout()
        for (field,msg) in config.field_labels():
            # label
            layout.addWidget(QLabel(msg,self))
            # edit : text or checkbox
            default=config.field_default(field)
            if isinstance(default,bool):
                edit=QCheckBox(msg)
                edit.setCheckState(config.get(field))
            else:
                edit=QLineEdit(config.get(field), self)
                edit.setAttribute(Qt.WA_MacShowFocusRect, 0)
            setattr(self,field,edit)
            layout.addWidget (edit)

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


    def apply(self):
        for field in config.fields():
            widget=getattr(self,field)
            if isinstance(widget,QCheckBox):
                config.set(field,widget.checkState())
            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")

    def save(self):
        self.apply()
        config.save_config()
        self.parent().setStatus("<font color='green'>Configuration saved!</font>", timeout=3000)
        

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