from __future__ import annotations

from dataclasses import dataclass, field


@dataclass
class Tribe:
    name: str
    level: str
    students: list[Student] = field(default_factory=list)

    def register_student(self, student: Student):
        self.students.append(student)


@dataclass
class Student:
    def __init__(self, id: str, name: str, tribe: Tribe) -> None:
        self.id = id
        self.name = name
        self.tribe = tribe

        self.tribe.register_student(self)

    def __eq__(self, other: object) -> bool:
        if isinstance(other, Student):
            return self.id == other.id
        return False