import uuid

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

from user.enums import UserNotificationEnum


class UserNotification(models.Model):
    """ Notifications for users

    """
    id = models.CharField(
        max_length=500,
        null=False,
        blank=False,
        choices=UserNotificationEnum.as_choices(drop_empty_choice=True),
        primary_key=True,
    )
    name = models.CharField(
        max_length=500,
        null=False,
        blank=False,
        unique=True,
        help_text="Human readable name"
    )
    is_active = models.BooleanField(default=True, help_text="Can be toggle to enable/disable this notification for all users")

    def __str__(self):
        return self.name


class KonovaUserExtension(models.Model):
    """ Extension model for additional ksp features

    Extends the default user model for some extras

    """
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    notifications = models.ManyToManyField(UserNotification, related_name="+")


class UserAction(models.TextChoices):
    """
    Defines different possible user actions for UserActionLogEntry
    """
    CHECKED = "checked", _("Checked")
    RECORDED = "recorded", _("Recorded")
    UNRECORDED = "unrecorded", _("Unrecorded")
    CREATED = "created", _("Created")
    EDITED = "edited", _("Edited")
    DELETED = "deleted", _("Deleted")


class UserActionLogEntry(models.Model):
    """ Wraps a user action log entry

    Can be used for workflow related attributes like checking or recording.

    """
    id = models.UUIDField(
        primary_key=True,
        default=uuid.uuid4,
    )
    user = models.ForeignKey(User, related_name='+', on_delete=models.CASCADE, help_text="Performing user")
    timestamp = models.DateTimeField(auto_now_add=True, help_text="Timestamp of performed action")
    action = models.CharField(
        max_length=255,
        null=True,
        blank=True,
        help_text="Short name for performed action - optional",
        choices=UserAction.choices,
    )
    comment = models.CharField(max_length=255, null=True, blank=True, help_text="Additional comment on this entry")

    class Meta:
        ordering = (
            "-timestamp",
        )

    def __str__(self):
        return "{} | {} | {}".format(self.user.username, self.timestamp, self.action)

    @property
    def action_humanize(self):
        """ Returns humanized version of enum

        Used for template rendering

        Returns:

        """
        choices = UserAction.choices
        for choice in choices:
            if choice[0] == self.action:
                return choice[1]
        return None