"""Print Blender render-result/pass APIs without writing project assets."""
import bpy

bpy.ops.mesh.primitive_cube_add()
scene = bpy.context.scene
scene.view_layers[0].use_pass_z = True
scene.view_layers[0].use_pass_normal = True
print("SCENE_COMPOSITOR_ATTRS", [name for name in dir(scene) if "composit" in name.lower() or "node" in name.lower()])
scene.use_nodes = True
tree = scene.compositing_node_group
if tree is None:
    tree = bpy.data.node_groups.new("SpriteForge compositor", "CompositorNodeTree")
    scene.compositing_node_group = tree
print("COMPOSITOR_TREE", tree, "NODE_TYPES", [node.bl_idname for node in tree.nodes])
file_node = tree.nodes.new("CompositorNodeOutputFile")
print("FILE_NODE_ATTRS", [name for name in dir(file_node) if "file" in name.lower() or "slot" in name.lower() or "item" in name.lower()])
print("FILE_NODE_PROPS", [prop.identifier for prop in file_node.bl_rna.properties])
print("FILE_ITEMS_ATTRS", [name for name in dir(file_node.file_output_items) if not name.startswith("__")])
print("FILE_ITEMS_NEW_DOC", file_node.file_output_items.new.__doc__)
print("FILE_FORMATS", file_node.format.bl_rna.properties["file_format"].enum_items.keys())
render_node = tree.nodes.new("CompositorNodeRLayers")
scene.view_layers[0].update_render_passes()
print("RENDER_OUTPUTS", [socket.name for socket in render_node.outputs])
file_node.format.file_format = "OPEN_EXR_MULTILAYER"
file_node.directory = bpy.app.tempdir
file_node.file_name = "spriteforge-passes"
file_node.file_output_items.clear()
for socket_type, name in (("RGBA", "Image"), ("FLOAT", "Depth"),
                          ("VECTOR", "Normal")):
    file_node.file_output_items.new(socket_type, name)
    tree.links.new(render_node.outputs[name], file_node.inputs[name])
print("OUTPUT_INPUTS", [(socket.name, socket.bl_idname) for socket in file_node.inputs])
print("OUTPUT_ITEM_PROPS", [[prop.identifier for prop in item.bl_rna.properties]
                            for item in file_node.file_output_items])
scene.render.engine = "BLENDER_EEVEE"
scene.render.resolution_x = 8
scene.render.resolution_y = 8
scene.render.resolution_percentage = 100
camera_data = bpy.data.cameras.new("camera")
camera = bpy.data.objects.new("camera", camera_data)
scene.collection.objects.link(camera)
camera.location = (3, -3, 2)
camera.rotation_euler = ((0, 0, 0))
camera.rotation_euler = ((0, 0, 0))
camera.rotation_euler = ((bpy.context.object.location-camera.location).to_track_quat("-Z", "Y").to_euler())
scene.camera = camera
scene.render.image_settings.file_format = "PNG"
scene.render.filepath = bpy.app.tempdir + "spriteforge-pass-api.exr"
bpy.ops.render.render(write_still=True)
result = bpy.data.images.get("Render Result")
print("RESULT_ATTRS", [name for name in dir(result) if "layer" in name.lower() or "pass" in name.lower() or "slot" in name.lower()])
print("RESULT_TYPE", type(result), "SIZE", tuple(result.size), "PIXELS", len(result.pixels))
print("VIEW_LAYER_ATTRS", [name for name in dir(scene.view_layers[0]) if "pass" in name.lower()])
try:
    import OpenImageIO
    print("OPENIMAGEIO", OpenImageIO.VERSION_STRING)
    source = OpenImageIO.ImageInput.open(bpy.app.tempdir + "spriteforge-passes.exr")
    index = 0
    while source.seek_subimage(index, 0):
        spec = source.spec()
        print("SUBIMAGE", index, spec.width, spec.height, list(spec.channelnames))
        index += 1
    source.close()
except Exception as error:
    print("OPENIMAGEIO_MISSING", repr(error))