#
# Copyright 2011-2014 Blender Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

# <pep8 compliant>

import bpy

from bpy.app.handlers import persistent


@persistent
def do_versions(self):
    # We don't modify startup file because it assumes to
    # have all the default values only.
    if not bpy.data.is_saved:
        return

    # Clamp Direct/Indirect separation in 270
    if bpy.data.version <= (2, 70, 0):
        for scene in bpy.data.scenes:
            cscene = scene.cycles
            sample_clamp = cscene.get("sample_clamp", False)
            if (sample_clamp and
                not cscene.is_property_set("sample_clamp_direct") and
                not cscene.is_property_set("sample_clamp_indirect")):

                cscene.sample_clamp_direct = sample_clamp
                cscene.sample_clamp_indirect = sample_clamp

    # Change of Volume Bounces in 271
    if bpy.data.version <= (2, 71, 0):
        for scene in bpy.data.scenes:
            cscene = scene.cycles
            if not cscene.is_property_set("volume_bounces"):
                cscene.volume_bounces = 1

    # Caustics Reflective/Refractive separation in 272
    if bpy.data.version <= (2, 72, 0):
        for scene in bpy.data.scenes:
            cscene = scene.cycles
            if (cscene.get("no_caustics", False) and
                not cscene.is_property_set("caustics_reflective") and
                not cscene.is_property_set("caustics_refractive")):

                cscene.caustics_reflective = False
                cscene.caustics_refractive = False