from django.db import models
from django.conf import settings
from tenants.managers import TenantScopedManager
from tenants.models import Tenant

class AuditLog(models.Model):
    tenant = models.ForeignKey(Tenant, on_delete=models.CASCADE, related_name='audit_logs')
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.SET_NULL, null=True, related_name='audit_logs')
    action = models.CharField(max_length=50) # created, updated, deleted
    model_name = models.CharField(max_length=100)
    object_id = models.CharField(max_length=255)
    changes = models.JSONField(default=dict, blank=True)
    ip_address = models.GenericIPAddressField(null=True, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)

    objects = TenantScopedManager()

    class Meta:
        ordering = ['-created_at']
        indexes = [
            models.Index(fields=['tenant', 'created_at']),
        ]

    def __str__(self):
        return f"{self.action} on {self.model_name}:{self.object_id} by {self.user}"

class ActivityLog(models.Model):
    tenant = models.ForeignKey(Tenant, on_delete=models.CASCADE, related_name='activity_logs')
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.SET_NULL, null=True, related_name='activity_logs')
    action = models.CharField(max_length=100)
    target_type = models.CharField(max_length=100)
    target_id = models.CharField(max_length=255)
    metadata = models.JSONField(default=dict, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)

    objects = TenantScopedManager()

    class Meta:
        ordering = ['-created_at']
        indexes = [
            models.Index(fields=['tenant', 'created_at']),
        ]

    def __str__(self):
        return f"{self.user} {self.action} {self.target_type}:{self.target_id}"