from django.db import models
from django.utils.translation import ugettext_lazy as _
from event.models import Event, Activity


class AbstractEquipment(models.Model):
    name = models.CharField(
                _("Nom du matériel"),
                max_length=200,
            )
    stock = models.PositiveSmallIntegerField(_("Quantité disponible"))
    description = models.TextField(_("Description"))
    activities = models.ManyToManyField(
                Activity,
                related_name="equipment",
                through="EquipmentAttribution",
            )

    class Meta:
        verbose_name = _("matériel abstrait")
        verbose_name_plural = _("matériels abstraits")

    def __str__(self):
        return self.name


class Equipment(AbstractEquipment):
    class Meta:
        verbose_name = _("matériel permanent")
        verbose_name_plural = _("matériels permanents")


class TemporaryEquipment(AbstractEquipment):
    event = models.ForeignKey(
                Event,
                related_name="specific_equipment",
                help_text=_("Évènement pour lequel le matériel "
                            "a été loué ou emprunté ou apporté"),
            )

    class Meta:
        verbose_name = _("matériel temporaire")
        verbose_name_plural = _("matériels temporaires")


class EquipmentAttribution(models.Model):
    equipment = models.ForeignKey(AbstractEquipment)
    activity = models.ForeignKey(Activity)
    amount = models.PositiveSmallIntegerField(_("Quantité attribuée"))
    remarks = models.TextField(_("Remarques concernant l'attribution"))

    class Meta:
        verbose_name = _("attribution de matériel")
        verbose_name_plural = _("attributions de matériel")

    def __str__(self):
        return "%s (%d) -> %s" % (self.equipment.name,
                                  self.amout,
                                  self.activity.get_herited('title'))


class EquipmentRemark(models.Model):
    remark = models.TextField(_("Remarque sur le matériel"))
    equipment = models.ForeignKey(
                AbstractEquipment,
                related_name="remarks",
                help_text=_("Matériel concerné par la remarque"),
            )
    is_broken = models.BooleanField()
    is_lost = models.BooleanField()

    class Meta:
        verbose_name = _("remarque sur matériel")
        verbose_name_plural = _("remarques sur le matériel")

    def __str__(self):
        return "%s : %s" % (self.equipment.name,
                            self.remark)