from django.db import models
from django.contrib.contenttypes.models import ContentType
from django.contrib.contenttypes.fields import GenericForeignKey
from account.models import User
from api.models.data.base import BaseModel



class ActivityLog(BaseModel):
    ACTION_CHOICES = [
        ('create', 'Create'),
        ('update', 'Update'),
        ('delete', 'Delete'),
        ('login', 'Login'),
        ('logout', 'Logout'),
        ('view', 'View'),
        ('export', 'Export'),
        ('payment', 'Payment'),
    ]

    user = models.ForeignKey(
        User,
        on_delete=models.SET_NULL,
        null=True,
        related_name='activity_logs',
    )
    action = models.CharField(max_length=20, choices=ACTION_CHOICES)
    model_name = models.CharField(max_length=100)
    object_id = models.PositiveIntegerField(null=True, blank=True)
    content_type = models.ForeignKey(
        ContentType,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
    )
    content_object = GenericForeignKey('content_type', 'object_id')
    description = models.TextField()
    ip_address = models.GenericIPAddressField(null=True, blank=True)
    user_agent = models.TextField(null=True, blank=True)
    changes = models.JSONField(null=True, blank=True)


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

    def __str__(self):
        if self.user:
            name = f'{self.user.first_name or ""} {self.user.last_name or ""}'.strip() or self.user.username
        else:
            name = 'Unknown'
        return f'{name} - {self.action} - {self.model_name} at {self.created_at}'