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')