from django.db import models

from apps.core.models import TimeStampedModel, UUIDModel


class NotificationTemplate(UUIDModel, TimeStampedModel):
    class Channel(models.TextChoices):
        SMS = "sms", "SMS"
        EMAIL = "email", "Email"
        PUSH = "push", "Push"
        INAPP = "inapp", "In-app"

    event = models.CharField(max_length=120, db_index=True)
    channel = models.CharField(max_length=12, choices=Channel.choices, default=Channel.SMS)
    subject = models.CharField(max_length=255, blank=True)
    body = models.TextField(help_text="Supports {{variable}} placeholders.")
    enabled = models.BooleanField(default=True)

    def __str__(self) -> str:
        return f"{self.event} ({self.channel})"


class NotificationRule(UUIDModel, TimeStampedModel):
    event = models.CharField(max_length=120, db_index=True)
    template = models.ForeignKey(NotificationTemplate, on_delete=models.CASCADE, related_name="rules")
    recipients = models.JSONField(default=list, blank=True)
    enabled = models.BooleanField(default=True)


class NotificationLog(UUIDModel, TimeStampedModel):
    template = models.ForeignKey(NotificationTemplate, null=True, blank=True, on_delete=models.SET_NULL)
    recipient = models.CharField(max_length=200, blank=True)
    channel = models.CharField(max_length=12)
    status = models.CharField(max_length=20, default="pending")
    error = models.TextField(blank=True)
    sent_at = models.DateTimeField(null=True, blank=True)