from xsdata.exceptions import XmlContextError
from xsdata.formats.dataclass.models.elements import XmlMeta, XmlVar
from xsdata.formats.dataclass.parsers.config import ParserConfig
from xsdata.formats.dataclass.parsers.mixins import XmlNode
from xsdata.formats.dataclass.parsers.utils import ParserUtils
from xsdata.models.enums import DataType


class StandardNode(XmlNode):
    """XmlNode for elements with a standard xsi:type.

    Args:
        meta: The parent xml meta instance
        var: The xml var instance
        datatype: The element standard xsi data type
        ns_map: The element namespace prefix-URI map
        config: The parser config instance
        nillable: Specifies whether nil content is allowed
        derived_factory: The derived element factory
    """

    __slots__ = (
        "config",
        "datatype",
        "derived_factory",
        "meta",
        "nillable",
        "ns_map",
        "var",
    )

    def __init__(
        self,
        meta: XmlMeta,
        var: XmlVar,
        datatype: DataType,
        ns_map: dict,
        config: ParserConfig,
        nillable: bool,
        derived_factory: type | None,
    ):
        """Initialize the xml node."""
        self.meta = meta
        self.var = var
        self.datatype = datatype
        self.ns_map = ns_map
        self.config = config
        self.nillable = nillable
        self.derived_factory = derived_factory

    def bind(
        self,
        qname: str,
        text: str | None,
        tail: str | None,
        objects: list,
    ) -> bool:
        """Bind the parsed data into an object for the ending element.

        This entry point is called when a xml element ends and is
        responsible to parse the current element text content.

        Args:
            qname: The element qualified name
            text: The element text content
            tail: The element tail content
            objects: The list of intermediate parsed objects

        Returns:
            Always true, it's not possible to fail during parsing
            for this node.
        """
        obj = ParserUtils.parse_var(
            meta=self.meta,
            var=self.var,
            config=self.config,
            value=text,
            types=[self.datatype.type],
            ns_map=self.ns_map,
            format=self.datatype.format,
        )

        if obj is None and not self.nillable:
            obj = ""

        if self.datatype.wrapper:
            obj = self.datatype.wrapper(obj)

        if self.derived_factory:
            obj = self.derived_factory(qname=qname, value=obj)

        objects.append((qname, obj))
        return True

    def child(self, qname: str, attrs: dict, ns_map: dict, position: int) -> XmlNode:
        """Raise an exception if there is a child element inside this node."""
        raise XmlContextError("StandardNode node doesn't support child nodes!")
