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

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


class SliceWidget(QWidget):
    def __init__(self, parent=None):
        QWidget.__init__(self, parent)

        self.nodeView = QTreeView(self)
        self.nodeView.setRootIsDecorated(False)
        self.nodeView.setAlternatingRowColors(True)
        self.nodeView.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)

        self.nodeModel = QStandardItemModel(0, 3, self)
        self.nodeModel.setHeaderData(0, Qt.Horizontal, QString("Testbed"))
        self.nodeModel.setHeaderData(1, Qt.Horizontal, QString("Hostname"))
        self.nodeModel.setHeaderData(2, Qt.Horizontal, QString("IsIn"))

        self.nodeView.setModel(self.nodeModel)

        label = QLabel("<a href='refresh'>Refresh</a>", self)
        label.setScaledContents(False)
        self.connect(label, SIGNAL('linkActivated(QString)'), self.refresh)

        slicename = QLabel ("Slice : %s"%(config.getSlice() or "None"),self)

        layout = QVBoxLayout()
        layout.addWidget(label)
        layout.addWidget(slicename)
        layout.addWidget(self.nodeView)
        self.setLayout(layout)
        self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
        

    def refresh(self, link=None):
        data = SfaData()
        if not data.getSlice(): 
            print 'slice not set yet'
            return
        if not data.SFACE_DEBUG:
            rspec_string = data.getRSpecFromSM()
        else:
            print 'SFACE_DEBUG : using local file'
            import os
            rspec_string = open(os.path.expanduser("~/.sfi/%s.rspec"%data.getSlice())).read()

        networks = self.rspec_get_networks(rspec_string)
        networks.reverse()

        for network in networks:
#            nodes = self.rspec_get_sliver_nodes_from_network(rspec_string, network)
#            for node in nodes: self.addNode(network, node, True)
#            nodes = self.rspec_get_other_nodes_from_network(rspec_string, network)
#            for node in nodes: self.addNode(network, node, False)
            # hacky - i'm just gettin used to this xml navigation stuff
            xml_nodes = self.rspec_get_xml_nodes_from_network(rspec_string, network)
            from lxml import etree
            # addNode inserts before, so let's start with the ones that are not in
            for xml_node in xml_nodes:
                if not xml_node.xpath('sliver'): 
                    self.addNode(network,xml_node.xpath('hostname/text()')[0],False)
            for xml_node in xml_nodes:
                if xml_node.xpath('sliver'): 
                    self.addNode(network,xml_node.xpath('hostname/text()')[0],True)
                

    def addNode(self, testbed, hostname, mark):
        self.nodeModel.insertRow(0)
        self.nodeModel.setData(self.nodeModel.index(0,0), QString(testbed))
        self.nodeModel.setData(self.nodeModel.index(0,1), QString(hostname))
        if mark:msg="x"
        else:   msg="-"
        self.nodeModel.setData(self.nodeModel.index(0,2), QString(msg))


class MainScreen(SfaScreen):
    def __init__(self, parent=None):
        SfaScreen.__init__(self, parent)

        slice = SliceWidget(self)
        self.init(slice, "Main Window", "PlanetLab Federation GUI")
#        slice.refresh()