import uuid

from typing import TYPE_CHECKING, List

from sqlalchemy import Unicode, text
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column, relationship

from ..db.base_class import reg
from .role_permission import RolePermission


if TYPE_CHECKING:
    from .role import Role


@reg.mapped_as_dataclass(unsafe_hash=True)
class Permission:
    __tablename__ = "permissions"

    id: Mapped[uuid.UUID] = mapped_column(
        "id", UUID(as_uuid=True), primary_key=True, server_default=text("gen_random_uuid()"), insert_default=uuid.uuid4
    )
    name: Mapped[str] = mapped_column("name", Unicode(255), unique=True, nullable=False)

    roles: Mapped[List["Role"]] = relationship(
        secondary=RolePermission.__table__, back_populates="permissions"  # type: ignore[attr-defined]
    )

    def __init__(self, name=None, id_=None):
        self.name = name
        self.id = id_