from django.db import models
from django.core.cache import cache

class AgentSettings(models.Model):
    """
    Singleton Container. 
    Now just a wrapper to hold the list of prompts.
    """
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        verbose_name = "Agent Configuration"
        verbose_name_plural = "Agent Configuration"

    def save(self, *args, **kwargs):
        self.pk = 1 # Force Singleton
        super().save(*args, **kwargs)
        cache.delete("agent_config_1")

    def __str__(self):
        return "Global Agent Settings"

    @classmethod
    def load(cls):
        obj, created = cls.objects.get_or_create(pk=1)
        return obj


class AgentPrompt(models.Model):
    """
    Simple Prompt Block.
    Just text and a switch.
    """
    settings = models.ForeignKey(AgentSettings, on_delete=models.CASCADE, related_name="prompts")
    
    content = models.TextField(help_text="The instruction text.")
    is_active = models.BooleanField(default=True)

    def __str__(self):
        # Display the first 50 chars as the name in admin
        # if self.is_active:
        #     return f"Active Prompt" if self.content else "Empty Prompt"
        # else:
        #     return f"Inactive Prompt: {self.content[:50]}..." if self.content else "Empty Prompt"
        return ""

class EmbeddingSession(models.Model):
    STATUS_CHOICES = (
        ('PENDING', 'Pending'),
        ('PROCESSING', 'Processing'),
        ('COMPLETED', 'Completed'),
        ('FAILED', 'Failed'),
    )
    
    # # E.g., 'jina-embeddings-v4' or 'openai-small'
    # target_embedder = models.CharField(max_length=100) 
    # # E.g., 'hadith' or 'article'
    # data_type = models.CharField(max_length=50) 
    status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='PENDING')
    progress = models.IntegerField(default=0)
    processed_items = models.IntegerField(default=0)
    total_items = models.IntegerField(default=0)
    error_message = models.TextField(blank=True, null=True)
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return f"Global Sync #{self.id} - {self.status}"