import bpy
from .import gen_vlayer

class GPEXP_OT_add_layer_to_render(bpy.types.Operator):
    bl_idname = "gp.add_layer_to_render"
    bl_label = "Add Gp Layer as render nodes"
    bl_description = "Create a view_layer for GP > add node > connect to output"
    bl_options = {"REGISTER"}

    @classmethod
    def poll(cls, context):
        return context.object and context.object.type == 'GPENCIL'

    # mode : bpy.props.StringProperty(options={'SKIP_SAVE'})

    def execute(self, context):
        ob = context.object
        layer = ob.data.layers.active
        if not layer:
            self.report({'ERROR'}, 'No active layer')
            return {"CANCELLED"}
        
        ct = 0
        # send scene ?
        for l in ob.data.layers:
            if not l.select:
                continue
            gen_vlayer.get_set_viewlayer_from_gp(ob, l)
            ct += 1
        if ct:
            self.report({'INFO'}, f'{ct} layer(s) added to scene "Render"')
            
        return {"FINISHED"}


def export_gp_objects(oblist, exclude_list=['MA', 'IN']):
    # Skip layer containing element in excluyde list
    if not isinstance(oblist, list):
        oblist = [oblist]

    for ob in oblist:
        for l in ob.data.layers:
            if any(x + '_' in l.info for x in exclude_list):
                continue
            if l.hide:
                continue
            vl, cp = gen_vlayer.get_set_viewlayer_from_gp(ob, l) # scene=fn.get_render_scene())


## send operator with mode ALL or SELECTED to batch build
class GPEXP_OT_add_objects_to_render(bpy.types.Operator):
    bl_idname = "gp.add_object_to_render"
    bl_label = "Add all Gp Layer of active object as render nodes"
    bl_description = "Setup GP object in render scene\nNote: 'send all' mode skip hided objects"
    bl_options = {"REGISTER"}

    @classmethod
    def poll(cls, context):
        return context.object and context.object.type == 'GPENCIL'

    mode : bpy.props.StringProperty(default='ALL', options={'SKIP_SAVE'})

    def execute(self, context):
        if self.mode == 'SELECTED':
            export_gp_objects([o for o in context.selected_objects if o.type == 'GPENCIL'])

        elif self.mode == 'ALL':
            scn = bpy.data.scenes.get('Scene')
            if not scn:
                self.report({'ERROR'}, 'Could not found default scene')
                return {"CANCELLED"}
            export_gp_objects([o for o in scn.objects if o.type == 'GPENCIL' and not o.hide_get()])

        return {"FINISHED"}

classes=(
GPEXP_OT_add_layer_to_render,
GPEXP_OT_add_objects_to_render,
)

def register(): 
    for cls in classes:
        bpy.utils.register_class(cls)

def unregister():
    for cls in reversed(classes):
        bpy.utils.unregister_class(cls)