from openpype.lib.attribute_definitions import FileDef
from openpype.pipeline.create import (
    Creator,
    HiddenCreator,
    CreatedInstance
)

from .pipeline import (
    list_instances,
    update_instances,
    remove_instances,
    HostContext,
)
from openpype.lib.transcoding import IMAGE_EXTENSIONS, VIDEO_EXTENSIONS


REVIEW_EXTENSIONS = IMAGE_EXTENSIONS + VIDEO_EXTENSIONS


def _cache_and_get_instances(creator):
    """Cache instances in shared data.

    Args:
        creator (Creator): Plugin which would like to get instances from host.

    Returns:
        List[Dict[str, Any]]: Cached instances list from host implementation.
    """

    shared_key = "openpype.traypublisher.instances"
    if not creator.has_collection_shared_data(shared_key):
        creator.set_collection_shared_data(shared_key, list_instances())
    return creator.get_collection_shared_data(shared_key)


class HiddenTrayPublishCreator(HiddenCreator):
    host_name = "traypublisher"

    def collect_instances(self):
        for instance_data in _cache_and_get_instances():
            creator_id = instance_data.get("creator_identifier")
            if creator_id == self.identifier:
                instance = CreatedInstance.from_existing(
                    instance_data, self
                )
                self._add_instance_to_context(instance)

    def update_instances(self, update_list):
        update_instances(update_list)

    def remove_instances(self, instances):
        remove_instances(instances)
        for instance in instances:
            self._remove_instance_from_context(instance)

    def _store_new_instance(self, new_instance):
        """Tray publisher specific method to store instance.

        Instance is stored into "workfile" of traypublisher and also add it
        to CreateContext.

        Args:
            new_instance (CreatedInstance): Instance that should be stored.
        """

        # Host implementation of storing metadata about instance
        HostContext.add_instance(new_instance.data_to_store())
        # Add instance to current context
        self._add_instance_to_context(new_instance)


class TrayPublishCreator(Creator):
    create_allow_context_change = True
    host_name = "traypublisher"

    def collect_instances(self):
        for instance_data in _cache_and_get_instances():
            creator_id = instance_data.get("creator_identifier")
            if creator_id == self.identifier:
                instance = CreatedInstance.from_existing(
                    instance_data, self
                )
                self._add_instance_to_context(instance)

    def update_instances(self, update_list):
        update_instances(update_list)

    def remove_instances(self, instances):
        remove_instances(instances)
        for instance in instances:
            self._remove_instance_from_context(instance)

    def _store_new_instance(self, new_instance):
        """Tray publisher specific method to store instance.

        Instance is stored into "workfile" of traypublisher and also add it
        to CreateContext.

        Args:
            new_instance (CreatedInstance): Instance that should be stored.
        """

        # Host implementation of storing metadata about instance
        HostContext.add_instance(new_instance.data_to_store())
        new_instance.mark_as_stored()

        # Add instance to current context
        self._add_instance_to_context(new_instance)


class SettingsCreator(TrayPublishCreator):
    create_allow_context_change = True

    extensions = []

    def create(self, subset_name, data, pre_create_data):
        # Pass precreate data to creator attributes
        data["creator_attributes"] = pre_create_data
        data["settings_creator"] = True
        # Create new instance
        new_instance = CreatedInstance(self.family, subset_name, data, self)

        self._store_new_instance(new_instance)

    def get_instance_attr_defs(self):
        return [
            FileDef(
                "representation_files",
                folders=False,
                extensions=self.extensions,
                allow_sequences=self.allow_sequences,
                single_item=not self.allow_multiple_items,
                label="Representations",
            ),
            FileDef(
                "reviewable",
                folders=False,
                extensions=REVIEW_EXTENSIONS,
                allow_sequences=True,
                single_item=True,
                label="Reviewable representations",
                extensions_label="Single reviewable item"
            )
        ]

    def get_pre_create_attr_defs(self):
        # Use same attributes as for instance attrobites
        return self.get_instance_attr_defs()

    @classmethod
    def from_settings(cls, item_data):
        identifier = item_data["identifier"]
        family = item_data["family"]
        if not identifier:
            identifier = "settings_{}".format(family)
        return type(
            "{}{}".format(cls.__name__, identifier),
            (cls, ),
            {
                "family": family,
                "identifier": identifier,
                "label": item_data["label"].strip(),
                "icon": item_data["icon"],
                "description": item_data["description"],
                "detailed_description": item_data["detailed_description"],
                "extensions": item_data["extensions"],
                "allow_sequences": item_data["allow_sequences"],
                "allow_multiple_items": item_data["allow_multiple_items"],
                "default_variants": item_data["default_variants"]
            }
        )