from django.db import models


class ProcessType(models.Model):
    name = models.CharField(max_length=100)
    code = models.CharField(max_length=10, blank=True)
    description = models.CharField(max_length=255, blank=True)
    sort_order = models.IntegerField(blank=True, null=True)

    def __str__(self):
        return self.name

    class Meta:
        unique_together = ('name', 'code')
        ordering = ['sort_order']


class Reagent(models.Model):
    name = models.CharField(max_length=100)
    code = models.CharField(max_length=10, blank=True)
    reagent_class = models.CharField(max_length=50, blank=True)
    sort_order = models.IntegerField(blank=True, null=True)

    def __str__(self):
        return self.name

    class Meta:
        unique_together = ('name', 'code')
        ordering = ['sort_order']


class Flaw(models.Model):
    name = models.CharField(max_length=200, unique=True)
    description = models.CharField(max_length=255, blank=True)
    sort_order = models.IntegerField(blank=True, null=True)

    def __str__(self):
        return self.name

    class Meta:
        ordering = ['sort_order']


class Processing(models.Model):
    process_type = models.ForeignKey(ProcessType, related_name='processings',
                                     on_delete=models.CASCADE)
    container = models.ForeignKey('misc.Container', related_name='processings',
                                  on_delete=models.CASCADE)
    container_label = models.CharField(max_length=50)
    process_date = models.DateField(blank=True, null=True)
    process_time = models.TimeField(blank=True, null=True)
    reagent = models.ForeignKey(Reagent, blank=True, null=True,
                                related_name='processings',
                                on_delete=models.CASCADE)
    reagent_volume = models.FloatField(blank=True, null=True)
    measurement_unit = models.ForeignKey('misc.MeasurementUnit', blank=True,
                                         null=True, related_name='processings',
                                         on_delete=models.CASCADE)
    minutes_in_reagent = models.IntegerField(blank=True, null=True)
    flaw = models.ForeignKey(Flaw, blank=True, null=True,
                             related_name='processings',
                             on_delete=models.CASCADE)

    def __str__(self):
        return "{} {} {}".format(self.process_date, self.process_type,
                                 self.container_label)

    class Meta:
        unique_together = ('process_type', 'container', 'container_label',
                           'process_date', 'process_time', 'reagent')