# SPDX-License-Identifier: GPL-3.0-or-later

import bpy
import os

from bpy.props import (FloatProperty,
                        BoolProperty,
                        EnumProperty,
                        StringProperty,
                        IntProperty,
                        PointerProperty,
                        FloatVectorProperty)

from bpy.app.handlers import persistent

# region Preferences

class RT_prefs(bpy.types.AddonPreferences):
    bl_idname = __package__

    use_env_base_path_templates : BoolProperty(
        name="Use Environment Base Path Templates",
        description="Use environmenet variables to set base path for file output templates\
            \nFollowing env variable are available:\
            \nRENDERTOOLBOX_EXR_PATH_TEMPLATE fo single base path file output\
            \nRENDERTOOLBOX_MULTILAYER_PATH_TEMPLATE for multilayer base path file output",
        default=True,
        )

    base_path_template: StringProperty(
        name="Base Path Template",
        description="Template for base paths",
        default="//render/{node_label}/",
        )
    
    base_path_multilayer_template: StringProperty(
        name="Base Path Multilayer Template",
        description="Template for base paths of multilayer files",
        default="//render/{node_label}/{node_label}_",
        )

    def draw(self, context):
        layout = self.layout
        layout.use_property_split = True
        layout.use_property_decorate = False

        layout.prop(self, "use_env_base_path_templates", text="Use Environment Base Path Templates")
        col = layout.column()
        # col.active = not self.use_env_base_path_templates
        col.prop(self, "base_path_template", text="Base Path Template")
        col.prop(self, "base_path_multilayer_template", text="Base Path Multilayer Template")
        
        if self.use_env_base_path_templates:
            col.separator()
            col.label(text="Environment variables will override above templates if set", icon='INFO')
            # col.label(text="RENDERTOOLBOX_EXR_PATH_TEMPLATE for single base path file output")
            # col.label(text="RENDERTOOLBOX_MULTILAYER_PATH_TEMPLATE for multilayer base path file output")
            col.label(text='If environment variables are not found, preferences will be used instead')


# region Handlers

@persistent
def set_render_toolbox_settings(dummy):
    ## Handler for prefs to scene properties replications
    from .properties import reset_scene_path_templates
    reset_scene_path_templates()

# region Register

classes = (
    RT_prefs,
)

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

    # prefs = bpy.context.preferences.addons[__package__].preferences

    if not 'set_render_toolbox_settings' in [hand.__name__ for hand in bpy.app.handlers.load_post]:
        bpy.app.handlers.load_post.append(set_render_toolbox_settings)

def unregister():
    if not 'set_render_toolbox_settings' in [hand.__name__ for hand in bpy.app.handlers.load_post]:
        bpy.app.handlers.load_post.remove(set_render_toolbox_settings)

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

# endregion