"""
Author: Michel Peltriaux
Organization: Struktur- und Genehmigungsdirektion Nord, Rhineland-Palatinate, Germany
Contact: michel.peltriaux@sgdnord.rlp.de
Created on: 17.11.20

"""
import uuid

from django.contrib.auth.models import User
from django.contrib.gis.db.models import MultiPolygonField
from django.db import models

from konova.settings import DEFAULT_SRID


class BaseResource(models.Model):
    """
    A basic resource model, which defines attributes for every derived model
    """
    id = models.UUIDField(
        primary_key=True,
        default=uuid.uuid4,
    )
    created_on = models.DateTimeField(auto_now_add=True, null=True)
    created_by = models.ForeignKey(User, null=True, on_delete=models.SET_NULL, related_name="+")

    class Meta:
        abstract = True


class BaseObject(BaseResource):
    """
    A basic object model, which specifies BaseResource.

    Mainly used for intervention, compensation, ecoaccount
    """
    identifier = models.CharField(max_length=1000, null=True, blank=True)
    title = models.CharField(max_length=1000, null=True, blank=True)
    deleted_on = models.DateTimeField(null=True, blank=True)
    deleted_by = models.ForeignKey(User, null=True, blank=True, on_delete=models.SET_NULL, related_name="+")
    comment = models.TextField(null=True, blank=True)

    class Meta:
        abstract = True


class Deadline(BaseResource):
    """
    Defines a deadline, which can be used to define dates with a semantic meaning
    """
    type = models.CharField(max_length=500, null=True, blank=True)
    date = models.DateField(null=True, blank=True)

    def __str__(self):
        return self.type


class Document(BaseResource):
    """
    Documents can be attached to compensation or intervention for uploading legal documents or pictures.
    """
    date_of_creation = models.DateField()
    document = models.FileField()
    comment = models.TextField()


class Geometry(BaseResource):
    """
    Outsourced geometry model so multiple versions of the same object can refer to the same geometry if it is not changed
    """
    geom = MultiPolygonField(null=True, blank=True, srid=DEFAULT_SRID)