from django.contrib.auth.models import AbstractUser
from django.db import models


class Participant(AbstractUser):
    email = models.EmailField(unique=True)
    name = models.CharField(max_length=100, blank=True)
    student_class = models.CharField(max_length=50, verbose_name="Class", blank=True)
    age = models.PositiveIntegerField(null=True, blank=True)
    gender = models.CharField(max_length=20, blank=True)
    institution = models.CharField(max_length=150, blank=True)

    def __str__(self):
        return self.username


class Quiz(models.Model):
    title = models.CharField(max_length=150)
    description = models.TextField()

    def __str__(self):
        return self.title


class Question(models.Model):
    quiz = models.ForeignKey(Quiz, on_delete=models.CASCADE, related_name="questions")
    question = models.TextField()

    def __str__(self):
        return self.question


class Option(models.Model):
    question = models.ForeignKey(Question, on_delete=models.CASCADE, related_name="options")
    option = models.CharField(max_length=255)
    is_correct = models.BooleanField(default=False)

    def __str__(self):
        return self.option


class Result(models.Model):
    participant = models.ForeignKey(Participant, on_delete=models.CASCADE, related_name="results")
    quiz = models.ForeignKey(Quiz, on_delete=models.CASCADE, related_name="results")
    score = models.PositiveIntegerField(default=0)
    total = models.PositiveIntegerField(default=0)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        ordering = ["-score", "created_at"]

    def __str__(self):
        return f"{self.participant.username} - {self.quiz.title}"