from django.db import models
from django.utils.translation import pgettext, gettext_lazy as _
from rules import always_allow

from outbo.apps.activity_log.enums import MessageType
from outbo.apps.core.models import (
    TimestampableDeletableMixin,
    RulesPolymorphicModel,
    SoftDeletablePolymorphicManager,
)


class LogItem(TimestampableDeletableMixin, RulesPolymorphicModel):
    objects = SoftDeletablePolymorphicManager()
    all_objects = SoftDeletablePolymorphicManager(alive_only=False)

    message = models.TextField(verbose_name=_("message"))
    message_type = models.CharField(
        verbose_name=_("message type"),
        max_length=25,
        blank=False,
        null=False,
        default=MessageType.USER,
        choices=((type, type.value) for type in MessageType),
    )
    created_by = models.ForeignKey(
        verbose_name=_("created by"), to="authentication.User", on_delete=models.CASCADE
    )

    def __str__(self):
        if self.message_type == MessageType.USER:
            return self.message
        return pgettext("log_item_messages", self.message)


class ProductLogItem(LogItem):
    class Meta:
        rules_permissions = {"view": always_allow, "add": always_allow}
        ordering = ["-created_at"]

    product = models.ForeignKey(
        verbose_name=_("product"),
        to="products.Product",
        on_delete=models.CASCADE,
        related_name="log_items",
        related_query_name="log_item",
    )

    stage = models.ForeignKey(
        to="products.ProductStage", on_delete=models.CASCADE, null=True, default=None
    )


class ProjectLogItem(LogItem):
    class Meta:
        rules_permissions = {"view": always_allow, "add": always_allow}
        ordering = ["-created_at"]

    project = models.ForeignKey(
        verbose_name=_("project"),
        to="projects.Project",
        on_delete=models.CASCADE,
        related_name="log_items",
        related_query_name="log_item",
    )