import bpy
import sys

from mathutils import Vector

# Grab command line arguments
argv = sys.argv

fbx = argv[argv.index("--") + 1] 
tgt = argv[argv.index("--") + 2]

print("Importing from ", fbx, " and Exporting to ", tgt)

# Deletes the whole object hierarchy
def delete_hierarchy(obj):
    names = set([obj.name])

    # Recursively grab object names
    def get_child_names(obj):
        for child in obj.children:
            names.add(child.name)
            if child.children:
                get_child_names(child)

    # Call the recursive function
    get_child_names(obj)
    
    # Delete the objects
    for n in names :
        bpy.data.objects.remove(bpy.data.objects[n], True)

# Import FBX
bpy.ops.import_scene.fbx( filepath = fbx )

# Grab the new armature and scale it.
new_armature = bpy.data.objects['Armature.001']
new_armature.scale = Vector( (0.013, 0.013, 0.013) )

# Make sure the armature has animation data
if new_armature.animation_data == None :
    new_armature.animation_data_create() 

# Grab the new animation    
new_armature_animation = new_armature.animation_data

# Grab the old armature
old_armature = bpy.data.objects['Armature']
old_armature_animation = old_armature.animation_data

# Get the properties of the old animation
properties = [p.identifier for p in old_armature_animation.bl_rna.properties if not p.is_readonly]

# Copy all animation properties
for prop in properties:
    setattr(new_armature_animation, prop, getattr(old_armature_animation, prop))
    
# Delete the old object
delete_hierarchy(old_armature)

# Rename the new object
new_armature.name = 'Armature'

# Save the new file
bpy.ops.wm.save_as_mainfile( filepath = tgt )