import typing

from abaqusConstants import *


class SurfaceOffsetAssignment:
    """The SurfaceOffsetAssignment object stores the surface offset fraction assignment
    definition for surfaces in ContactExp and ContactStd objects. The
    SurfaceOffsetAssignment object has no constructor or members.

    Notes
    -----
    This object can be accessed by:

    .. code-block:: python

        import interaction
        mdb.models[name].interactions[name].surfaceOffsetAssignments

    The corresponding analysis keywords are:

    - SURFACE PROPERTY ASSIGNMENT
    """

    def changeValuesInStep(
        self, stepName: str, index: int, value: typing.Union[SymbolicConstant, float]
    ):
        """This method allows modification of surface offset fraction assignments already defined
        on surfaces in a given step.

        Parameters
        ----------
        stepName
            A String specifying the name of the step in which the surface offset assignments are to
            be modified.
        index
            An Int specifying the position of the surface offset fraction assignment whose value is
            to be modified.
        value
            A tuple specifying the value of the surface offset assignments for the surface whose
            index is referenced. Each tuple contains one entry:
            
            - A Float or a SymbolicConstant specifying the surface offset fraction value to be used
              for the surface. Possible values of the SymbolicConstant are ORIGINAL, SPOS, and SNEG.
        """
        pass

    def appendInStep(
        self, stepName: str, assignments: typing.Union[SymbolicConstant, float]
    ):
        """This method allows addition of surface offset fraction assignments to new surfaces in a
        given step.

        Parameters
        ----------
        stepName
            A String specifying the name of the step in which new surface offset fraction
            assignments are to be defined.
        assignments
            A sequence of tuples specifying the surface offset fraction assignments. Each tuple
            contains two entries:
            
            - A region object or the SymbolicConstant GLOBAL specifying the surface to which the
              offset fraction is assigned.
            - A Float or a SymbolicConstant specifying the surface offset fraction value to be used
              for the surface. Possible values of the SymbolicConstant are ORIGINAL, SPOS, and SNEG.
        """
        pass

    def delete(self, indices: tuple):
        """The delete method allows you to delete existing surface offset fraction assignments.

        Parameters
        ----------
        indices
            A sequence of Ints specifying the index of each surface offset fraction assignment to
            delete.
        """
        pass
