"""Title value object."""

from dataclasses import dataclass

from app.domain.value_objects.base import ValueObject


@dataclass(frozen=True, slots=True)
class Title(ValueObject[str]):
    """Blog post title value object."""

    MIN_LENGTH: int = 3
    MAX_LENGTH: int = 200

    def _validate(self) -> None:
        if not isinstance(self.value, str):
            raise ValueError("Title must be a string")
        if len(self.value) < self.MIN_LENGTH:
            raise ValueError(f"Title must be at least {self.MIN_LENGTH} characters")
        if len(self.value) > self.MAX_LENGTH:
            raise ValueError(f"Title must be at most {self.MAX_LENGTH} characters")
        if not self.value.strip():
            raise ValueError("Title cannot be empty or whitespace")