from __future__ import annotations

from dataclasses import dataclass
from datetime import date
from typing import TYPE_CHECKING, Optional

if TYPE_CHECKING:
    from backend.model.student import Tribe


class Assessment:
    def __init__(self, name: str, tribe: Tribe, term: int) -> None:
        self.tribe = tribe
        self.term = term
        self.name = name
        self.exercises = []

        self.tribe.register_assessment(self)

    def register_exercise(self, exercise: Exercise):
        self.exercises.append(exercise)

    @property
    def questions(self):
        return sum([exercise.questions for exercise in self.exercises])


class Exercise:
    def __init__(self, name: str, assessment: Assessment, date: Optional[date]) -> None:
        self.name = name
        self.assessment = assessment
        self.date = date
        self.questions = []

        self.assessment.register_exercise(self)

    def register_question(self, question: Question):
        self.questions.append(question)


@dataclass(frozen=True)
class Domain:
    name: str
    description: str


@dataclass(frozen=True)
class Skill:
    name: str
    description: str


class Question:
    def __init__(
        self,
        name: str,
        exercise: Exercise,
        description: str,
        skill: Skill,
        domain: Domain,
        is_leveled: bool,
        scale: int,
    ) -> None:
        self.name = name
        self.exercise = exercise
        self.exercise.register_question(self)
        self.description = description
        self.skill = skill
        self.domain = domain
        self.is_leveled = is_leveled
        self.scale = scale