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


class FeatureFlag(models.Model):
    slug = models.SlugField(max_length=100)
    name = models.CharField(max_length=200)
    description = models.TextField(blank=True)
    is_active = models.BooleanField(default=False)
    rollout_percentage = models.PositiveSmallIntegerField(default=100, help_text="0-100. 100 = all users")
    tenant_id = models.UUIDField(null=True, blank=True, help_text="Null = global. Value = tenant-specific")
    environments = models.JSONField(default=list, help_text='["production", "staging"] or [] = all')
    category = models.CharField(max_length=50, blank=True, help_text="Grouping for UI")
    metadata = models.JSONField(default=dict)

    class Meta:
        db_table = "features_flag"
        unique_together = [("slug", "tenant_id")]


class FeatureFlagOverride(models.Model):
    flag = models.ForeignKey(FeatureFlag, on_delete=models.CASCADE, related_name="overrides")
    user = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE,
        null=True,
        blank=True,
        related_name="+",
    )
    group = models.ForeignKey(
        "auth.Group",
        on_delete=models.CASCADE,
        null=True,
        blank=True,
        related_name="+",
    )
    is_enabled = models.BooleanField()

    class Meta:
        db_table = "features_override"
        unique_together = [("flag", "user"), ("flag", "group")]