import FreeCADGui as Gui
import FreeCAD as App

import ahb_utils

class AHB_View_Annotate:
	def GetResources(self):
		return {"MenuText": "Annotate view",
				"ToolTip": "Annotates a TechDraw view with object names",
				"Pixmap": ""
				}

	def IsActive(self):
		return ahb_utils.getCurrentView() is not None

	def Activated(self):
		workbench = Gui.getWorkbench("AssemblyHandbookWorkbench") #: :type workbench: AssemblyHandbookWorkbench
		
		if len(Gui.Selection.getSelection()) == 0:
			page = workbench.techDrawExtensions.getActivePage()
			workbench.techDrawExtensions.refreshOverlays(page)
			return
		
		if len(Gui.Selection.getSelection()) != 1:
			raise Exception("Please select exactly one TechDraw view")

		view = Gui.Selection.getSelection()[0]
		if view.TypeId == 'TechDraw::DrawPage':
			workbench.techDrawExtensions.refreshOverlays(view)
			return
		elif view.TypeId != 'TechDraw::DrawViewPart':
			raise Exception("Selected object is not a TechDraw view")
		
		overlay_view = workbench.techDrawExtensions.getOverlayView(view)
		
		doc = view.Document
		
		page = workbench.techDrawExtensions.getViewPage(view)
		if page is None:
			raise Exception("Can't find page in which the selected view is located")
		
		def list_sub_parts(parts):
			result = []
			for part in parts:
				if part.TypeId == 'App::Link':
					result.append(part)
				elif part.TypeId == 'Part::FeaturePython' and hasattr(part, 'LinkedObject'): # variant link
					result.append(part)
				
				if hasattr(part, 'Group'):
					result.extend(list_sub_parts(part.Group))
			
			return result	
		
		all_parts = list_sub_parts(view.XSource)
		
		# Remove balloons referencing missing objects
		for balloon in page.Views:
			if balloon.TypeId == 'TechDraw::DrawViewBalloon' and "Assembly_handbook_Source" in balloon.PropertiesList:
				if balloon.SourceView != view and balloon.SourceView != overlay_view: continue
				partLink = workbench.techDrawExtensions.getBalloonSourcePart(balloon)
				if partLink is None or partLink not in all_parts:
					ref_name = "<no ref>"
					try:
						ref_name = balloon.Assembly_handbook_Source[1]
					except:
						pass
					print(balloon.Name + " references missing object " + ref_name + ", removing balloon")
					doc.removeObject(balloon.Name)
		
		for partLink in view.XSource:
			workbench.techDrawExtensions.add_or_update_balloon(view, partLink, '')
			
		workbench.techDrawExtensions.refreshOverlays(page)

from ahb_command import AHB_CommandWrapper
AHB_CommandWrapper.addGuiCommand('AHB_view_annotate', AHB_View_Annotate())