from io import BytesIO

from django.core.files.base import ContentFile
from django.db import models
from django.utils.text import gettext_lazy as _
from PIL import Image

from config.models import SingletonModel


class WebSettings(SingletonModel):
    web_title = models.CharField(
        max_length=32, blank=False, verbose_name=_("título de la web")
    )
    web_description = models.CharField(
        max_length=128, blank=True, default="", verbose_name=_("descripción de la web")
    )
    logo = models.ImageField(
        blank=True, null=True, upload_to="assets", verbose_name=_("logo de la web")
    )

    business_name = models.CharField(
        max_length=128,
        blank=True,
        null=True,
        verbose_name=_("nombre de negocio"),
        help_text=_("nombre fiscal del comercio"),
    )
    business_vat_id = models.CharField(
        max_length=16, blank=True, null=True, verbose_name=_("CIF del negocio")
    )
    business_brand = models.CharField(
        max_length=64,
        blank=True,
        null=True,
        verbose_name=_("marca de negocio"),
        help_text=_("marca o nombre comercial que se va a mostrar en la web"),
    )

    business_address = models.CharField(
        max_length=64, blank=True, null=True, verbose_name=_("dirección de negocio")
    )
    business_state = models.CharField(
        max_length=32,
        blank=True,
        null=True,
        verbose_name=_("unidad territorial del negocio"),
    )
    business_zip = models.CharField(
        max_length=16,
        blank=True,
        null=True,
        verbose_name=_("código postal del negocio"),
    )

    business_phone = models.CharField(
        max_length=16,
        blank=True,
        null=True,
        verbose_name=_("número de teléfono de contacto"),
    )
    business_email = models.EmailField(
        max_length=80, blank=True, null=True, verbose_name=_("e-mail de contacto")
    )
    business_email_2 = models.EmailField(
        max_length=80,
        blank=True,
        null=True,
        verbose_name=_("e-mail secundario de contacto"),
    )

    bg_color = models.CharField(
        max_length=9,
        default="",
        blank=True,
        null=True,
        verbose_name=_("color de fondo"),
    )
    theme_color = models.CharField(
        max_length=9, default="", blank=True, null=True, verbose_name=_("color de tema")
    )

    logo_256 = models.ImageField(
        upload_to="assets", blank=True, null=True, verbose_name=_("logo 256x256")
    )
    logo_128 = models.ImageField(
        upload_to="assets", blank=True, null=True, verbose_name=_("logo 128x128")
    )
    logo_64 = models.ImageField(
        upload_to="assets", blank=True, null=True, verbose_name=_("logo 64x64")
    )
    logo_32 = models.ImageField(
        upload_to="assets", blank=True, null=True, verbose_name=_("logo 32x32")
    )
    theme_colors = models.JSONField(
        default=dict, verbose_name=_("colores del tema"), blank=True
    )

    def get_resized_logo(self, size):
        width, height = size
        image = Image.open(self.logo)
        image = image.resize(size, Image.Resampling.LANCZOS)
        buffer = BytesIO()
        image.save(fp=buffer, format="PNG")

        return ContentFile(buffer.getvalue(), name=f"logo_{width}.png")

    def save(self, *args, **kwargs):
        if self.logo:
            self.logo_32 = self.get_resized_logo((32, 32))
            self.logo_64 = self.get_resized_logo((64, 64))
            self.logo_128 = self.get_resized_logo((128, 128))
            self.logo_256 = self.get_resized_logo((256, 256))

        super().save(*args, **kwargs)

    class Meta:
        verbose_name = _("ajustes de la web")
        verbose_name_plural = _("ajustes de la web")