# Copyright (c) 2013 Shotgun Software Inc.
#
# CONFIDENTIAL AND PROPRIETARY
#
# This work is provided "AS IS" and subject to the Shotgun Pipeline Toolkit
# Source Code License included in this distribution package. See LICENSE.
# By accessing, using, copying or modifying this work you indicate your
# agreement to the Shotgun Pipeline Toolkit Source Code License. All rights
# not expressly granted therein are reserved by Shotgun Software Inc.

from tank import Hook
import os
import sgtk

__author__ = "Diego Garcia Huerta"
__contact__ = "https://www.linkedin.com/in/diegogh/"


class BreakdownSceneOperations(Hook):
    """
    Breakdown operations for Harmony.

    This implementation handles detection of harmony file geometric, 
    alembic, usd and texture nodes.
    """

    def scan_scene(self):
        """
        The scan scene method is executed once at startup and its purpose is
        to analyze the current scene and return a list of references that are
        to be potentially operated on.

        The return data structure is a list of dictionaries. Each scene 
        reference that is returned should be represented by a dictionary with 
        three keys:

        - "attr": The filename attribute of the 'node' that is to be operated
           on. Most DCCs have a concept of a node, attribute, path or some other
           way to address a particular object in the scene.
        - "type": The object type that this is. This is later passed to the
           update method so that it knows how to handle the object.
        - "path": Path on disk to the referenced object.

        Toolkit will scan the list of items, see if any of the objects matches
        any templates and try to determine if there is a more recent version
        available. Any such versions are then displayed in the UI as out of 
        date.
        """
        app = self.parent
        engine = sgtk.platform.current_engine()
        dcc_app = engine.app

        attr_name = "meta.shotgun.path"

        refs = []

        read_nodes = dcc_app.get_nodes_of_type(["READ"]) or []
        for read_node in read_nodes:
            ref_path = dcc_app.get_node_metadata(read_node, attr_name)
            if ref_path:
                ref_path = sgtk.util.shotgun_path.ShotgunPath.from_current_os_path(
                    ref_path
                )

                refs.append(
                    {
                        "attr": attr_name,
                        "type": "file",
                        "path": ref_path.current_os,
                        "node": read_node,
                    }
                )

        engine.log_debug("Found: %s" % refs)

        audio_columns = dcc_app.get_columns_of_type("SOUND") or []
        for audio_column in audio_columns:
            audio_metadata_name = audio_column + "." + attr_name
            ref_path = dcc_app.get_scene_metadata(audio_metadata_name)

            if ref_path:
                ref_path = sgtk.util.shotgun_path.ShotgunPath.from_current_os_path(
                    ref_path
                )

                refs.append(
                    {
                        "attr": "SOUND",
                        "type": "file",
                        "path": ref_path.current_os,
                        "node": audio_column,
                    }
                )

        return refs

    def update(self, items):
        """
        Perform replacements given a number of scene items passed from the app.

        Once a selection has been performed in the main UI and the user clicks
        the update button, this method is called.

        The items parameter is a list of dictionaries on the same form as was
        generated by the scan_scene hook above. The path key now holds
        the that each attribute should be updated *to* rather than the current
        path.
        """

        engine = self.parent.engine

        for i in items:
            attr = i["node"]
            node_type = i["type"]
            new_path = i["path"]

            if node_type == "file":
                # Not Implemented
                pass

        if items:
            engine.show_busy(
                "tk-multi-breakdown",
                "Updating functionality has not been implemented yet.",
            )