from dataclasses import dataclass
from enum import Enum
from typing import Any

import z3


class MemoryType(Enum):
    """Types of symbolic memory objects."""

    ARRAY = "array"
    DICT = "dict"
    OBJECT = "object"
    POINTER = "pointer"


@dataclass
class SymbolicArray:
    """Symbolic array representation."""

    name: str
    length: int | z3.ArithRef  # Concrete or symbolic length
    element_type: type
    constraints: list[z3.BoolRef]


@dataclass
class SymbolicDict:
    """Symbolic dictionary representation."""

    name: str
    key_type: type
    value_type: type
    constraints: list[z3.BoolRef]


class SymbolicMemory:
    """
    Symbolic memory model (stub).

    """

    def __init__(self):
        """
        - Setup Z3 array theory
        - Initialize heap allocator
        - Create constraint tracking
        """
        self.arrays: dict[str, SymbolicArray] = {}
        self.dicts: dict[str, SymbolicDict] = {}
        self.constraints: list[z3.BoolRef] = []

    def create_symbolic_array(self, name: str, length: int | z3.ArithRef, element_type: type = int) -> SymbolicArray:
        """
        - Initialize Z3 Array(Int, element_type)
        - Add length constraint
        - Track in memory model
        """
        raise NotImplementedError("Symbolic arrays not yet implemented")

    def load(self, array: SymbolicArray, index: int | z3.ArithRef) -> Any:
        """
        - Generate bounds check constraint (0 <= index < length)
        - Return symbolic value from Z3 array
        - Handle out-of-bounds error path
        """
        raise NotImplementedError("Symbolic array load not yet implemented")

    def store(self, array: SymbolicArray, index: int | z3.ArithRef, value: Any) -> None:
        """
        - Generate bounds check constraint
        - Update Z3 array representation
        - Track write for later loads
        """
        raise NotImplementedError("Symbolic array store not yet implemented")

    def create_symbolic_dict(self, name: str, key_type: type = str, value_type: type = int) -> SymbolicDict:
        """
        - Initialize Z3 representation
        - Track key-value constraints
        """
        raise NotImplementedError("Symbolic dicts not yet implemented")
