from django.db import models

class BackgroundTask(models.Model):
    class Meta:
        db_table = 'bg_remover_background_tasks'

    STATUS_CHOICES = [
        ('PENDING', 'Pending'),
        ('PROCESSING', 'Processing'),
        ('COMPLETED', 'Completed'),
        ('FAILED', 'Failed'),
    ]

    TASK_TYPE_CHOICES = [
        ('BG_REMOVE', 'Background Removal'),
        ('CAPTION', 'Image Captioning'),
        # future:
        # ('UPSCALE', 'Image Upscaling'),
        # ('VQA', 'Visual Q&A'),
    ]

    task_id = models.UUIDField(unique=True, editable=False)
    task_type = models.CharField(
        max_length=20,
        choices=TASK_TYPE_CHOICES,
        default='BG_REMOVE'
    )
    status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='PENDING')
    zip_file = models.FileField(upload_to='bulk_results/', null=True, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)
    error_message = models.TextField(null=True, blank=True)

    def __str__(self):
        return f"Task {self.task_type} - {self.task_id} - {self.status}"