from django.db import models
from django.utils.translation import gettext_lazy as _
from django.template.defaultfilters import date as _date
from django.urls import reverse


class Fournisseur(models.Model):

    nom_fournisseur = models.CharField('nom', max_length=50)

    class Meta:
        verbose_name = _("fournisseur")
        verbose_name_plural = _("fournisseurs")

    def __str__(self):
        return self.nom_fournisseur

    def get_absolute_url(self):
        return reverse("fournisseur_detail", kwargs={"pk": self.pk})


class Technicien(models.Model):

    nom_technicien = models.CharField('nom', max_length=50)
    ref_fournisseur = models.ForeignKey("maintenance.Fournisseur",
                                        verbose_name=_("fournisseur"),
                                        on_delete=models.PROTECT)

    class Meta:
        verbose_name = _("technicien")
        verbose_name_plural = _("techniciens")

    def __str__(self):
        return self.nom_technicien

    def get_absolute_url(self):
        return reverse("technicien_detail", kwargs={"pk": self.pk})


class Machine(models.Model):

    numero_serie = models.CharField('numéro de série', max_length=20)
    nom_machine = models.CharField('nom', max_length=50)
    ref_fournisseur = models.ForeignKey("maintenance.Fournisseur",
                                        verbose_name=_("fournisseur"),
                                        on_delete=models.PROTECT)

    class Meta:
        verbose_name = _("machine")
        verbose_name_plural = _("machines")

    def __str__(self):
        return self.nom_machine

    def get_absolute_url(self):
        return reverse("machine_detail", kwargs={"pk": self.pk})


class Panne(models.Model):

    moment_panne = models.DateTimeField('moment de la panne',
                                        auto_now_add=True)
    description_panne = models.TextField('description', default='-')
    ref_machine = models.ForeignKey("maintenance.Machine",
                                    verbose_name=_("machine"),
                                    on_delete=models.PROTECT)

    class Meta:
        verbose_name = _("Panne")
        verbose_name_plural = _("Pannes")

    def __str__(self):
        if len(self.description_panne) <= 20:
            short_description = self.description_panne
        else:
            short_description = self.description_panne[:20]
        return _date(self.moment_panne,
                     'SHORT_DATETIME_FORMAT') + " | " + short_description

    def get_absolute_url(self):
        return reverse("panne_detail", kwargs={"pk": self.pk})


class Intervention(models.Model):

    moment_intervention = models.DateTimeField('moment de l\'intervention',
                                               auto_now_add=True)
    ref_panne = models.ForeignKey("maintenance.Panne",
                                  verbose_name=_("panne"),
                                  on_delete=models.PROTECT)
    ref_technicien = models.ForeignKey("maintenance.Technicien",
                                       verbose_name=_("technicien"),
                                       on_delete=models.PROTECT,
                                       null=True,
                                       blank=True)
    description_intervention = models.TextField('description',
                                                blank=True,
                                                null=True)

    class Meta:
        verbose_name = _("intervention")
        verbose_name_plural = _("interventions")

    def __str__(self):
        if len(self.description_intervention) <= 20:
            short_description = self.description_intervention
        else:
            short_description = self.description_intervention[:20]
        return _date(self.moment_intervention,
                     'SHORT_DATETIME_FORMAT') + " | " + short_description

    def get_absolute_url(self):
        return reverse("intervention_detail", kwargs={"pk": self.pk})