import bpy
from . import fn
from time import time

class GPEXP_OT_render_all_scenes(bpy.types.Operator):
    bl_idname = "gp.render_all_scenes"
    bl_label = "Render all scenes"
    bl_description = "Render all scene except Render"
    bl_options = {"REGISTER"}

    @classmethod
    def poll(cls, context):
        return True

    def execute(self, context):
        start = time()
        ct = 0
        for scn in bpy.data.scenes:
            if scn.name == 'Scene':
                continue
            if not scn.use_nodes:
                continue
            outfiles = [n for n in scn.node_tree.nodes if n.type == 'OUTPUT_FILE']
            if not outfiles:
                print(f'\n -!-> Skip {scn.name}, No output files')
                continue

            if all(x.mute for x in outfiles):
                print(f'\n -!-> Skip {scn.name}, All output file are muted')
                continue
            
            print(f'\n --> Rendering {scn.name}')
            # bpy.context.window.scene = scn
            bpy.ops.render.render(animation=True, scene=scn.name)
            ct += 1

        print(f'\nDone. {ct} scenes rendered in {time()-start:.2f}s')
        return {"FINISHED"}


classes=(
GPEXP_OT_render_all_scenes,
)

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

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