from django.db import models
from django.contrib.auth.models import User
from django.utils.text import slugify
import uuid
from django.core.exceptions import ValidationError

class QivipQuiz(models.Model):
    STATUS_VALUES = {
        "öffentlich": "Öffentlich",
        "versteckt": "Versteckt",
        "privat": "Privat",
    }
    DIFFICULTY_VALUES = {
        "1": "1",
        "2": "2",
        "3": "3",
        "4": "4",
        "5": "5",
        "nicht gesetzt":"nicht gesetzt",

    }
        
    def validate_description(value):
        if value.strip() == "In dem Quiz geht es um ...":
            raise ValidationError("Bitte gib eine aussagekräftige Beschreibung ein.")


    uuid = models.UUIDField(default=uuid.uuid4, editable=False, unique=True)
    user_id = models.ForeignKey(User, on_delete=models.CASCADE, related_name='quiz')
    creation_date = models.DateTimeField(auto_now_add=True)
    update_date = models.DateTimeField(auto_now=True)
    status = models.CharField(max_length=10, choices=list(STATUS_VALUES.items()), default="öffentlich")
    category = models.ForeignKey('QuizCategory', related_name='quiz', on_delete=models.CASCADE)
    tags = models.ManyToManyField('Tag', blank=True)
    name = models.CharField(max_length=75)
    description = models.TextField(validators=[validate_description],max_length=200,blank=False, default="In dem Quiz geht es um ...")
    difficulty= models.CharField(max_length=13, choices=list(DIFFICULTY_VALUES.items()), default="nicht gesetzt", help_text="1: niedrigste Schwierigkeit und 5: höchste Schwierigkeit")

    def __str__(self):
        return self.name


# Create your models here.
class QivipQuestion(models.Model):
    uuid = models.UUIDField(default=uuid.uuid4, editable=False, unique=True)
    quiz_id = models.ForeignKey(QivipQuiz, on_delete=models.CASCADE, related_name='question')
    creation_date = models.DateTimeField(auto_now_add=True)
    update_date = models.DateTimeField(auto_now=True)
    data = models.TextField()

    def __str__(self):
        return self.data[:50]

class Tag(models.Model):
    name = models.CharField(max_length=100, unique=True)

    def __str__(self):
        return self.name

class QuizCategory(models.Model):
    name = models.CharField(max_length=100, unique=True)
    description = models.TextField(blank=True, null=True)
    slug = models.SlugField(unique=True, blank=True)

    def save(self, *args, **kwargs):
        if not self.slug:
            self.slug = slugify(self.name)
        super().save(*args, **kwargs)

    def __str__(self):
        return self.name