from app.repositories import UserAnswerRepository, QuizRepository, UserRepository
from app.schemas.requests import UserAnswerSchema
from app.models import UserAnswerEntity
from app.models.entities import AnswerItemEntity
from app.exception import ValidationException


class AnswerService:
    def __init__(
        self,
        answer_repository: UserAnswerRepository,
        quiz_repository: QuizRepository,
        user_repositroy: UserRepository,
    ):
        self.answer_repository = answer_repository
        self.quiz_repository = quiz_repository
        self.user_repositroy = user_repositroy

    def get_answer_by_id(self, answer_id):
        return self.answer_repository.get_answer_by_id(answer_id)

    def get_answer(self, quiz_id, user_id, session_id):
        if quiz_id is not None:
            return self.answer_repository

    def create_answer(self, answer_data: UserAnswerSchema):
        quiz_data = self.quiz_repository.get_by_id(answer_data.quiz_id)
        if not quiz_data:
            raise ValidationException(message="Quiz not found")
        user_data = self.user_repositroy.get_user_by_id(answer_data.user_id)
        if not user_data:
            raise ValidationException(message="user is not registered")
        total_quiz_played = quiz_data.total_user_playing + 1
        self.quiz_repository.update_user_playing(
            quiz_id=quiz_data.id, total_user=total_quiz_played
        )

        question_map = {q.index: q for q in quiz_data.question_listings}

        answer_item_Entity = []
        total_correct = 0
        for user_answer in answer_data.answers:
            question = question_map.get(user_answer.question_index)
            if question is None:
                raise ValueError(
                    f"Question index {user_answer.question_index} tidak ditemukan di kuis."
                )

            correct = False
            if question.type == "fill_the_blank":
                correct = (
                    user_answer.answer.strip().lower()
                    == question.target_answer.strip().lower()
                )
            elif question.type == "true_false":
                correct = user_answer.answer == question.target_answer
            elif question.type == "option":
                try:
                    answer_index = int(user_answer.answer)
                    if 0 <= answer_index < len(question.options):
                        correct = str(answer_index) == question.target_answer
                    else:
                        raise ValueError(
                            f"Index jawaban tidak valid untuk soal {question.index}"
                        )
                except ValueError:
                    raise ValueError(
                        f"Jawaban bukan index valid untuk soal {question.index}"
                    )
            else:
                raise ValueError(f"Tipe soal tidak dikenali: {question.type}")

            user_answer.is_correct = correct
            if correct:
                total_correct += 1

            answer_item_Entity.append(
                AnswerItemEntity(
                    question_index=user_answer.question_index,
                    answer=user_answer.answer,
                    is_correct=user_answer.is_correct,
                    time_spent=user_answer.time_spent,
                )
            )
        total_questions = len(quiz_data.question_listings)
        total_score = (
            total_correct * 100 // total_questions
        )  # contoh perhitungan: nilai 100 dibagi rata

        # Buat entitas yang akan disimpan
        answer_entity = UserAnswerEntity(
            session_id=answer_data.session_id,
            quiz_id=answer_data.quiz_id,
            user_id=answer_data.user_id,
            answered_at=answer_data.answered_at,
            answers=answer_item_Entity,
            total_correct=total_correct,
            total_questions=total_questions,
            total_score=total_score,
        )

        return self.answer_repository.create(answer_entity)

    def update_answer(self, answer_id, answer_data):
        return self.answer_repository.update(answer_id, answer_data)

    def delete_answer(self, answer_id):
        return self.answer_repository.delete_by_id(answer_id)