from Sink import Sink, SinkInfo
from pyjamas.ui.Tree import Tree, TreeItem
from pyjamas.ui.PopupPanel import PopupPanel
from pyjamas.ui.HTML import HTML
from SfaData import PlanetLabData

def alwaysDelegateFocus(elem):
    return True

class PopupRecord(PopupPanel):
    def __init__(self, record):
        PopupPanel.__init__(self, True)
        contents = HTML("<pre>" + record + "</pre>")
        self.setWidget(contents)
        self.setStyleName("ks-popups-Popup")

class SfaItem(TreeItem):
    def __init__(self, hrn, kind, truncate = True):
        self.kind = kind
        self.hrn = hrn
        if truncate:
            hrn = hrn.split('.')[-1]
        if self.kind == "(authority)":
            self.label = "<b>%s</b>" % hrn
        elif self.kind == "(slice)":
            self.label = "<u><i>%s</i></u>" % hrn
        elif self.kind == "(user)":
            self.label = "%s" % hrn
        else:
            self.label = "<b>%s</b>" % hrn

        TreeItem.__init__(self, self.label)

        if self.kind == "(authority)":
            self.addItem(PendingItem())

class PendingItem(TreeItem):
    def __init__(self):
        TreeItem.__init__(self, "Please wait...")

    def isPendingItem(self):
        return True

class SfaBrowser(Sink):
    def __init__(self):

        Sink.__init__(self)

        self.data = PlanetLabData()

        self.tree = Tree()
        self.tree.shouldTreeDelegateFocusToElement = alwaysDelegateFocus
        
        item = SfaItem("plc", "(authority)", truncate = False)
        self.tree.addItem(item)

        item = SfaItem("plc.glc", "(authority)", truncate = False)
        self.tree.addItem(item)

        item = SfaItem("plc.vini", "(authority)", truncate = False)
        self.tree.addItem(item)

        item = SfaItem("ple", "(authority)", truncate = False)
        self.tree.addItem(item)

        item = SfaItem("plj", "(authority)", truncate = False)
        self.tree.addItem(item)

        self.tree.addTreeListener(self)

        self.initWidget(self.tree)


    def onTreeItemSelected(self, item):
        record = self.data.getRecord(item.hrn)
        p = PopupRecord(record)
        left = item.getAbsoluteLeft() + 10
        top = item.getAbsoluteTop() + 10
        p.setPopupPosition(left, top)
        p.show()

    def onTreeItemStateChanged(self, item):
        child = item.getChild(0)
        if hasattr(child, "isPendingItem"):
            item.removeItem(child)
            hrns = sorted(self.data.listChildren(item.hrn), 
                          key=lambda hrn: hrn[0])
            for (hrn, kind) in hrns:
                item.addItem(SfaItem(hrn, kind))

    def onShow(self):
        pass


def init():
    return SinkInfo("Browse SFA", "SFA Hierarchy Browser", SfaBrowser)