# -*- coding: utf-8 -*-
# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4

import sip
from datetime import datetime, timedelta

sip.setapi(u'QDate', 2)
sip.setapi(u'QDateTime', 2)
sip.setapi(u'QString', 2)
sip.setapi(u'QTextStream', 2)
sip.setapi(u'QTime', 2)
sip.setapi(u'QUrl', 2)
sip.setapi(u'QVariant', 2)


from PyQt4 import QtCore


class Settings(QtCore.QSettings):
    __default_settings__ = {
        # This defaults to yesterday in order to force the update check to run when you've never run it before.
        u'core/last version test': datetime.now().date() - timedelta(days=1)
    }

    def value(self, key):
        # if group() is not empty the group has not been specified together with the key.
        if self.group():
            default_value = Settings.__default_settings__[self.group() + u'/' + key]
        else:
            default_value = Settings.__default_settings__[key]
        setting = super(Settings, self).value(key, default_value)
        return self._convert_value(setting, default_value)

    def _convert_value(self, setting, default_value):
        # On OS X (and probably on other platforms too) empty value from QSettings is represented as type
        # PyQt4.QtCore.QPyNullVariant. This type has to be converted to proper 'None' Python type.
        if isinstance(setting, QtCore.QPyNullVariant) and setting.isNull():
            setting = None
        # Handle 'None' type (empty value) properly.
        if setting is None:
            # An empty string saved to the settings results in a None type being returned.
            # Convert it to empty unicode string.
            if isinstance(default_value, unicode):
                return u''
            # An empty list saved to the settings results in a None type being returned.
            else:
                return []
        # Convert the setting to the correct type.
        if isinstance(default_value, bool):
            if isinstance(setting, bool):
                return setting
            # Sometimes setting is string instead of a boolean.
            return setting == u'true'
        if isinstance(default_value, int):
            return int(setting)
        return setting

if __name__ == u'__main__':
    settings = Settings()
    print settings.fileName()
    settings.beginGroup(u'core')
    last_test = settings.value(u'last version test')
    this_test = datetime.now().date()
    settings.setValue(u'last version test', this_test)
    settings.endGroup()