from django.conf import settings
from django.db import models


class UserPet(models.Model):
    user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="pet")
    name = models.CharField(max_length=40, default="小葫芦")
    level = models.PositiveIntegerField(default=1)
    experience = models.PositiveIntegerField(default=0)
    appearance = models.JSONField(default=dict, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)


class UserAbility(models.Model):
    class Dimension(models.TextChoices):
        VISION = "vision", "眼光"
        HUMANITIES = "humanities", "人文"
        DETECTION = "detection", "侦探"
        MODELING = "modeling", "建模"
        CONNECTION = "connection", "联结"

    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="abilities")
    dimension = models.CharField(max_length=20, choices=Dimension.choices)
    level = models.PositiveIntegerField(default=0)
    fragments = models.PositiveIntegerField(default=0)

    class Meta:
        constraints = [
            models.UniqueConstraint(fields=("user", "dimension"), name="unique_user_ability")
        ]


class Card(models.Model):
    slug = models.SlugField(unique=True)
    name = models.CharField(max_length=80)
    mathematician = models.CharField(max_length=80)
    description = models.TextField()
    image = models.CharField(max_length=200, blank=True)

    def __str__(self):
        return self.name


class UserCard(models.Model):
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="cards")
    card = models.ForeignKey(Card, on_delete=models.PROTECT)
    source = models.CharField(max_length=80)
    acquired_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        constraints = [
            models.UniqueConstraint(fields=("user", "card"), name="unique_user_card")
        ]


class RewardTransaction(models.Model):
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="rewards")
    idempotency_key = models.CharField(max_length=100)
    source = models.CharField(max_length=80)
    rewards = models.JSONField(default=dict)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        constraints = [
            models.UniqueConstraint(
                fields=("user", "idempotency_key"), name="unique_user_reward_transaction"
            )
        ]