from django.db import models
import uuid

class CatalogFile(models.Model):

    uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)

    name = models.CharField(max_length=32)

    STATUS_CHOICES = [
        ('PENDING', 'Pending'),
        ('IN_PROGRESS', 'In Progress'),
        ('INGESTED', 'Ingested'),
        ('INDEX_IN_PROGRESS', 'Index in progress'),
        ('INDEXED', 'Indexed')
    ]

    status = models.CharField(max_length=17, choices=STATUS_CHOICES, default='PENDING')


class GaiaSource(models.Model):

    uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    
    catalog_file = models.ForeignKey(
        CatalogFile, on_delete=models.CASCADE, 
        related_name='sources', null=True
    )

    #solution_id = models.CharField(blank=True, default='', max_length=19)
    #solution identifier
    #why charfield and not integerfield?
    
    #designation = models.CharField(max_length=30, blank=True, default='')
    #unique source designation across all DR
    
    #source_id = models.CharField(max_length=19, blank=True, default='')
    #unique id within DR again why not integer
        
    #ref_epoch = models.FloatField(default=0.0, null=True)
    #reference epoch julian years    
    
    ra = models.FloatField(default=0.0, null=True)
    ra_error = models.FloatField(default=0.0, null=True)
    #barycentric ra in icrs at ref epoch
    #error in mas

    dec = models.FloatField(default=0.0, null=True)
    dec_error = models.FloatField(default=0.0, null=True)
    #barycentric dec in icrs at ref epoch
    #error in mas
 
    #parallax = models.FloatField(default=0.0, null=True)
    #parallax_error = models.FloatField(default=0.0, null=True)
    #parallax and error at ref epoch in mas

    #pmra = models.FloatField(default=0.0, null=True)
    #pmra_error = models.FloatField(default=0.0, null=True)
    #proper motion over ra mas/yr
    
    #pmdec = models.FloatField(default=0.0, null=True)
    #pmdec_error = models.FloatField(default=0.0, null=True)
    #proper motion over dec mas/yr

    #phot_g_mean_mag = models.FloatField(default=0.0, null=True)
    #mean g band magnitude, vega scale
    
    #phot_bp_mean_mag = models.FloatField(default=0.0, null=True)
    #mean bp magnitude, vega scale
    
    #phot_rp_mean_mag = models.FloatField(default=0.0, null=True)
    #mean rp magnitude, vega scale

    healpix_ring_index = models.BigIntegerField(null=True, blank=True)

    healpix_nested_index = models.BigIntegerField(null=True, blank=True)

    #healpix_nside = models.IntegerField(null=True, blank=True)
    #additional field storing nside value