from django.db import models
from django.urls import reverse
from django.contrib.auth.models import User
from django.utils.translation import gettext_lazy as _
from datetime import datetime

from fellchensammlung.tools import misc


class Image(models.Model):
    title = models.CharField(max_length=200)
    image = models.ImageField(upload_to='images')
    alt_text = models.TextField(max_length=2000)

    def __str__(self):
        return self.title


class Species(models.Model):
    """Model representing a species of animal."""
    name = models.CharField(max_length=200, help_text=_('Enter a animal species'),
                            verbose_name=_('Name'))

    def __str__(self):
        """String for representing the Model object."""
        return self.name

    class Meta:
        verbose_name = _('Species')
        verbose_name_plural = _('Species')


class Location(models.Model):
    def __str__(self):
        return f"{self.name}"

    GERMANY = "DE"
    AUSTRIA = "AT"
    SWITZERLAND = "CH"
    COUNTRIES_CHOICES = {
        GERMANY: "Germany",
        AUSTRIA: "Austria",
        SWITZERLAND: "Switzerland"
    }

    name = models.CharField(max_length=200)
    postcode = models.CharField(max_length=200)
    country = models.CharField(max_length=20, choices=COUNTRIES_CHOICES)
    description = models.TextField(null=True, blank=True, verbose_name=_('Description'))


class RescueOrganization(models.Model):
    def __str__(self):
        return f"{self.name}"

    name = models.CharField(max_length=200)
    trusted = models.BooleanField(default=False, verbose_name=_('Trusted'))
    location = models.ForeignKey(Location, on_delete=models.PROTECT)
    instagram = models.URLField(null=True, blank=True, verbose_name=_('Instagram profile'))
    facebook = models.URLField(null=True, blank=True, verbose_name=_('Facebook profile'))
    fediverse_profile = models.URLField(null=True, blank=True, verbose_name=_('Fediverse profile'))
    website = models.URLField(null=True, blank=True, verbose_name=_('Website'))


class AdoptionNotice(models.Model):
    def __str__(self):
        return f"{self.name}"

    created_at = models.DateField(verbose_name=_('Created at'), default=datetime.now)
    searching_since = models.DateField(verbose_name=_('Searching for a home since'))
    name = models.CharField(max_length=200)
    description = models.TextField(null=True, blank=True, verbose_name=_('Description'))
    organization = models.ForeignKey(RescueOrganization, blank=True, null=True, on_delete=models.SET_NULL,
                                     verbose_name=_('Organization'))
    further_information = models.URLField(null=True, blank=True, verbose_name=_('Link to further information'))
    group_only = models.BooleanField(default=False, verbose_name=_('Only group adoption'))
    photos = models.ManyToManyField(Image, blank=True)

    @property
    def animals(self):
        return Animal.objects.filter(adoption_notice=self)

    def get_absolute_url(self):
        """Returns the url to access a detailed page for the animal."""
        return reverse('adoption-notice-detail', args=[str(self.id)])

    def get_photos(self):
        """
        First trys to get group photos that are attached to the adoption notice if there is none it trys to fetch
        them from the animals
        """
        group_photos = self.photos.all()
        if len(group_photos) > 0:
            return group_photos
        else:
            photos = []
            for animal in self.animals:
                photos.extend(animal.photos.all())
            if len(photos) > 0:
                return photos

    def get_photo(self):
        """
        Returns the first photo it finds.
        First trys to get group photos that are attached to the adoption notice if there is none it trys to fetch
        them from the animals
        """
        group_photos = self.photos.all()
        if len(group_photos) > 0:
            return group_photos[0]
        else:
            photos = []
            for animal in self.animals:
                photos.extend(animal.photos.all())
            if len(photos) > 0:
                return photos[0]


class Animal(models.Model):
    MALE_NEUTERED = "M_N"
    MALE = "M"
    FEMALE_NEUTERED = "F_N"
    FEMALE = "F"
    SEX_CHOICES = {
        MALE_NEUTERED: "male_neutered",
        MALE: "male",
        FEMALE_NEUTERED: "female_neutered",
        FEMALE: "female",
    }

    date_of_birth = models.DateField(verbose_name=_('Date of birth'))
    name = models.CharField(max_length=200)
    description = models.TextField(null=True, blank=True, verbose_name=_('Description'))
    species = models.ForeignKey(Species, on_delete=models.PROTECT)
    photos = models.ManyToManyField(Image, blank=True)
    sex = models.CharField(max_length=20, choices=SEX_CHOICES, )
    adoption_notice = models.ForeignKey(AdoptionNotice, on_delete=models.CASCADE)

    def __str__(self):
        return f"{self.name}"

    @property
    def age(self):
        return datetime.today().date() - self.date_of_birth

    @property
    def hr_age(self):
        """Returns a human-readable age based on the date of birth."""
        return misc.age_as_hr_string(self.age)

    @property
    def photos_list(self):
        """"""
        return self.photos.all()

    def get_absolute_url(self):
        """Returns the url to access a detailed page for the animal."""
        return reverse('animal-detail', args=[str(self.id)])


class MarkdownContent(models.Model):
    """
    Base class to store markdown content
    """
    title = models.CharField(max_length=100)
    content = models.TextField()

    class Meta:
        verbose_name_plural = "Markdown content"

    def __str__(self):
        return self.title

class Rule(models.Model):
    """
    Class to store rules
    """
    title = models.CharField(max_length=200)

    # Markdown is allowed in rule text
    rule_text = models.TextField()

    def __str__(self):
        return self.title