from django.db import models


class DashboardCardSnapshot(models.Model):
    sensor_id = models.UUIDField(db_index=True)
    card_name = models.CharField(max_length=128, db_index=True)
    payload = models.JSONField(default=dict, blank=True)
    generated_at = models.DateTimeField(auto_now_add=True, db_index=True)
    expires_at = models.DateTimeField(db_index=True)
    source = models.CharField(max_length=32, default="computed")

    class Meta:
        ordering = ["-generated_at"]
        indexes = [
            models.Index(fields=["sensor_id", "card_name", "-generated_at"]),
        ]
        verbose_name = "Dashboard Card Snapshot"
        verbose_name_plural = "Dashboard Card Snapshots"

    def __str__(self):
        return f"{self.card_name} - {self.sensor_id} - {self.generated_at}"


class DashboardAiRequestLog(models.Model):
    sensor_id = models.UUIDField(db_index=True)
    request_payload = models.JSONField(default=dict, blank=True)
    response_payload = models.JSONField(default=dict, blank=True)
    status = models.CharField(max_length=32, default="pending")
    created_at = models.DateTimeField(auto_now_add=True, db_index=True)

    class Meta:
        ordering = ["-created_at"]
        verbose_name = "Dashboard AI Request Log"
        verbose_name_plural = "Dashboard AI Request Logs"

    def __str__(self):
        return f"{self.sensor_id} - {self.status} - {self.created_at}"