from __future__ import annotations
import pprint
import re  # noqa: F401
import json

from pydantic import BaseModel, ConfigDict, StrictStr
from typing import Any, ClassVar, Dict, List, Optional, Set, TYPE_CHECKING
from typing_extensions import Self

from istari_digital_client.mixin import ClientHaving
from istari_digital_client.log_utils import log_method

if TYPE_CHECKING:
    from istari_digital_client.v2.models.file import File
    from istari_digital_client.v2.api.v2_api import Resource
    from istari_digital_client.v2.models.file_revision import FileRevision


class Product(BaseModel, ClientHaving):
    """
    Represents a derived output (Product) generated from a file revision.

    A Product captures the relationship between a specific file revision and the resource
    it contributes to, such as a Model, Snapshot, or Job. It may optionally carry a
    `relationship_identifier` to disambiguate among multiple outputs originating
    from the same revision.

    This class supports resolution of the underlying file, file revision, and
    associated resource, provided the client is initialized.

    """

    revision_id: StrictStr
    file_id: Optional[StrictStr] = None
    resource_type: Optional[StrictStr] = None
    resource_id: Optional[StrictStr] = None
    relationship_identifier: Optional[StrictStr] = None
    __properties: ClassVar[List[str]] = [
        "revision_id",
        "file_id",
        "resource_type",
        "resource_id",
        "relationship_identifier",
    ]

    model_config = ConfigDict(
        populate_by_name=True,
        validate_assignment=True,
        protected_namespaces=(),
    )

    @property
    @log_method
    def file(self) -> Optional["File"]:
        """
        Retrieve the associated file.

        This requires that ``file_id`` is set and that the client is initialized.
        If either is missing, this will return None.
        """
        if self.file_id is None or self.client is None:
            return None
        return self.client.get_file(self.file_id)

    @property
    @log_method
    def resource(self) -> Optional["Resource"]:
        """
        Retrieve the resource linked to this product.

        This requires that ``resource_type``, ``resource_id``, and the client are all set.
        If any are missing, this will return None.
        """
        if (
            self.resource_type is None
            or self.resource_id is None
            or self.client is None
        ):
            return None
        return self.client.get_resource(self.resource_type, self.resource_id)

    @property
    @log_method
    def revision(self) -> Optional["FileRevision"]:
        """
        Retrieve the file revision associated with this product.

        This requires that ``revision_id`` is set and that the client is initialized.
        If either is missing, this will return None.
        """
        if self.revision_id is None or self.client is None:
            return None
        return self.client.get_revision(self.revision_id)

    def to_str(self) -> str:
        """
        Return the string representation of the model using field aliases.

        This method serializes the model to a JSON-formatted string, respecting any defined aliases
        for fields instead of their original attribute names.
        """
        return pprint.pformat(self.model_dump(by_alias=True))

    def to_json(self) -> str:
        """
        Return the JSON string representation of the model using field aliases.

        This method serializes the model into a JSON-formatted string, using aliases for field names
        where defined instead of their raw attribute names.
        """
        return json.dumps(self.to_dict())

    @classmethod
    def from_json(cls, json_str: str) -> Optional[Self]:
        """
        Create an instance of the model from a JSON string.

        This method deserializes the given JSON string into a model instance. It expects the
        string to match the model's schema, using field aliases where applicable.

        :param json_str: JSON string representing the model.
        :type json_str: str
        """
        return cls.from_dict(json.loads(json_str))

    def to_dict(self) -> Dict[str, Any]:
        """
        Return the dictionary representation of the model using field aliases.

        This method differs from calling `self.model_dump(by_alias=True)` in the following way:

        - Fields with a value of `None` are included in the output only if they are nullable and
          were explicitly set during model initialization. All other `None` fields are omitted.
        """
        excluded_fields: Set[str] = set([])

        _dict = self.model_dump(
            by_alias=True,
            exclude=excluded_fields,
            exclude_none=True,
        )
        # set to None if file_id (nullable) is None
        # and model_fields_set contains the field
        if self.file_id is None and "file_id" in self.model_fields_set:
            _dict["file_id"] = None

        # set to None if resource_type (nullable) is None
        # and model_fields_set contains the field
        if self.resource_type is None and "resource_type" in self.model_fields_set:
            _dict["resource_type"] = None

        # set to None if resource_id (nullable) is None
        # and model_fields_set contains the field
        if self.resource_id is None and "resource_id" in self.model_fields_set:
            _dict["resource_id"] = None

        # set to None if relationship_identifier (nullable) is None
        # and model_fields_set contains the field
        if (
            self.relationship_identifier is None
            and "relationship_identifier" in self.model_fields_set
        ):
            _dict["relationship_identifier"] = None

        return _dict

    @classmethod
    def from_dict(cls, obj: Optional[Dict[str, Any]]) -> Optional[Self]:
        """
        Create an instance of the model from a dictionary.

        This method deserializes a dictionary into a model instance. The input should use
        field aliases where applicable.

        :param obj: Dictionary representing the model.
        :type obj: Optional[Dict[str, Any]]
        """
        if obj is None:
            return None

        if not isinstance(obj, dict):
            return cls.model_validate(obj)

        _obj = cls.model_validate(
            {
                "revision_id": obj.get("revision_id"),
                "file_id": obj.get("file_id"),
                "resource_type": obj.get("resource_type"),
                "resource_id": obj.get("resource_id"),
                "relationship_identifier": obj.get("relationship_identifier"),
            }
        )
        return _obj
