from decimal import Decimal

from django.conf import settings
from django.db import models

from contacts.models import Contact
from core.models import TimeStampedModel, UUIDPrimaryKeyModel


class Invoice(UUIDPrimaryKeyModel, TimeStampedModel):
    class Status(models.TextChoices):
        DRAFT = "draft", "Draft"
        OPEN = "open", "Open"
        PAID = "paid", "Paid"
        VOID = "void", "Void"
        UNCOLLECTIBLE = "uncollectible", "Uncollectible"

    number = models.CharField(max_length=32, unique=True)
    contact = models.ForeignKey(
        Contact,
        on_delete=models.PROTECT,
        related_name="invoices",
    )
    description = models.CharField(max_length=255)
    amount = models.DecimalField(max_digits=10, decimal_places=2)
    currency = models.CharField(max_length=8, default="usd")
    status = models.CharField(
        max_length=16, choices=Status.choices, default=Status.DRAFT
    )
    due_date = models.DateField(null=True, blank=True)
    stripe_invoice_id = models.CharField(max_length=255, blank=True)
    stripe_checkout_session_id = models.CharField(max_length=255, blank=True)
    hosted_invoice_url = models.URLField(blank=True)
    paid_at = models.DateTimeField(null=True, blank=True)
    created_by = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        null=True,
        blank=True,
        on_delete=models.SET_NULL,
        related_name="created_invoices",
    )
    notes = models.TextField(blank=True)

    class Meta:
        ordering = ["-created_at"]

    def __str__(self) -> str:
        return f"{self.number} · {self.contact} · {self.amount} {self.currency}"

    @property
    def amount_cents(self) -> int:
        return int((self.amount * Decimal("100")).quantize(Decimal("1")))