###############################
## Portal plane
###############################

def GetGroupObjectsReferences(self, context):

    groups = []
    groups.append(('0', "None", "")) # setting a default entry as a first element of our enum

    for obj in bpy.context.scene.objects:
        if obj.WowWMOGroup.Enabled:
            groups.append((obj.name, obj.name, ""))

    return groups

'''
def UpdateFirstGroupObjectReference(self, context):

    if context.object.WowPortalPlane.First == context.object.WowPortalPlane.Second and context.object.WowPortalPlane.First != '0':
        context.object.WowPortalPlane.Second = '0'

def UpdateSecondGroupObjectReference(self, context):

    if context.object.WowPortalPlane.Second == context.object.WowPortalPlane.First and context.object.WowPortalPlane.Second != '0':
        context.object.WowPortalPlane.First = '0'
'''


class WowPortalPlanePanel(bpy.types.Panel):
    bl_space_type = "PROPERTIES"
    bl_region_type = "WINDOW"
    bl_context = "object"
    bl_label = "Wow Portal Plane"
    bl_options = {'DEFAULT_CLOSED'}

    def draw_header(self, context):
        layout = self.layout
        self.layout.prop(context.object.WowPortalPlane, "Enabled")

    def draw(self, context):
        layout = self.layout
        row = layout.row()
        layout.enabled = context.object.WowPortalPlane.Enabled
        self.layout.prop(context.object.WowPortalPlane, "First")
        self.layout.prop(context.object.WowPortalPlane, "Second")

    @classmethod
    def poll(cls, context):
        return (context.object is not None and context.object.data is not None and isinstance(context.object.data,bpy.types.Mesh))

class WowPortalPlanePropertyGroup(bpy.types.PropertyGroup):
    Enabled = bpy.props.BoolProperty(name="", description="Enable wow WMO group properties")
    First = bpy.props.EnumProperty(items=GetGroupObjectsReferences, name="First group", description="First group")
    Second = bpy.props.EnumProperty(items=GetGroupObjectsReferences, name="Second group", description="Second group")
    PortalID = bpy.props.IntProperty(name="Portal's ID", description="Portal ID")

def RegisterWowPortalPlaneProperties():
    bpy.types.Object.WowPortalPlane = bpy.props.PointerProperty(type=WowPortalPlanePropertyGroup)

def UnregisterWowPortalPlaneProperties():
    bpy.types.Object.WowPortalPlane = None