# -*- coding: utf-8 -*-
import datetime
from south.db import db
from south.v2 import DataMigration
from django.db import models
from decimal import Decimal, ROUND_DOWN

class Migration(DataMigration):

    def forwards(self, orm):
        # Select all the invoices and number of registration codes(as qty) associated with every invoice
        invoices = orm.Invoice.objects.extra(
            select={
                'qty': 'SELECT COUNT(*) FROM shoppingcart_courseregistrationcode '
                       'WHERE shoppingcart_courseregistrationcode.invoice_id = shoppingcart_invoice.id'
            }
        ).all()
        for invoice in invoices:
            invoice_item = self._create_invoice_item(invoice, orm)
            orm.CourseRegistrationCode.objects.filter(invoice=invoice).update(invoice_item=invoice_item)

    def backwards(self, orm):
        """
        We don't need the backward migration because the data is already there in old models and
        schema rollback will automatically remove this new data.
        """
        pass

    @staticmethod
    def _create_invoice_item(invoice, orm):
        unit_price = ((Decimal(invoice.total_amount))/invoice.qty).quantize(Decimal('.01'), rounding=ROUND_DOWN)
        invoice_item = orm.CourseRegistrationCodeInvoiceItem.objects.create(
            invoice=invoice,
            qty=invoice.qty,
            unit_price=unit_price,
            course_id=invoice.course_id
        )
        return invoice_item

    models = {
        'auth.group': {
            'Meta': {'object_name': 'Group'},
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '80'}),
            'permissions': ('django.db.models.fields.related.ManyToManyField', [], {'to': "orm['auth.Permission']", 'symmetrical': 'False', 'blank': 'True'})
        },
        'auth.permission': {
            'Meta': {'ordering': "('content_type__app_label', 'content_type__model', 'codename')", 'unique_together': "(('content_type', 'codename'),)", 'object_name': 'Permission'},
            'codename': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
            'content_type': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['contenttypes.ContentType']"}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'name': ('django.db.models.fields.CharField', [], {'max_length': '50'})
        },
        'auth.user': {
            'Meta': {'object_name': 'User'},
            'date_joined': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime.now'}),
            'email': ('django.db.models.fields.EmailField', [], {'max_length': '75', 'blank': 'True'}),
            'first_name': ('django.db.models.fields.CharField', [], {'max_length': '30', 'blank': 'True'}),
            'groups': ('django.db.models.fields.related.ManyToManyField', [], {'to': "orm['auth.Group']", 'symmetrical': 'False', 'blank': 'True'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'is_active': ('django.db.models.fields.BooleanField', [], {'default': 'True'}),
            'is_staff': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
            'is_superuser': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
            'last_login': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime.now'}),
            'last_name': ('django.db.models.fields.CharField', [], {'max_length': '30', 'blank': 'True'}),
            'password': ('django.db.models.fields.CharField', [], {'max_length': '128'}),
            'user_permissions': ('django.db.models.fields.related.ManyToManyField', [], {'to': "orm['auth.Permission']", 'symmetrical': 'False', 'blank': 'True'}),
            'username': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '30'})
        },
        'contenttypes.contenttype': {
            'Meta': {'ordering': "('name',)", 'unique_together': "(('app_label', 'model'),)", 'object_name': 'ContentType', 'db_table': "'django_content_type'"},
            'app_label': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'model': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
            'name': ('django.db.models.fields.CharField', [], {'max_length': '100'})
        },
        'shoppingcart.certificateitem': {
            'Meta': {'object_name': 'CertificateItem', '_ormbases': ['shoppingcart.OrderItem']},
            'course_enrollment': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['student.CourseEnrollment']"}),
            'course_id': ('xmodule_django.models.CourseKeyField', [], {'max_length': '128', 'db_index': 'True'}),
            'mode': ('django.db.models.fields.SlugField', [], {'max_length': '50'}),
            'orderitem_ptr': ('django.db.models.fields.related.OneToOneField', [], {'to': "orm['shoppingcart.OrderItem']", 'unique': 'True', 'primary_key': 'True'})
        },
        'shoppingcart.coupon': {
            'Meta': {'object_name': 'Coupon'},
            'code': ('django.db.models.fields.CharField', [], {'max_length': '32', 'db_index': 'True'}),
            'course_id': ('xmodule_django.models.CourseKeyField', [], {'max_length': '255'}),
            'created_at': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime(2015, 1, 27, 0, 0)'}),
            'created_by': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['auth.User']"}),
            'description': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
            'expiration_date': ('django.db.models.fields.DateTimeField', [], {'null': 'True', 'blank': 'True'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'is_active': ('django.db.models.fields.BooleanField', [], {'default': 'True'}),
            'percentage_discount': ('django.db.models.fields.IntegerField', [], {'default': '0'})
        },
        'shoppingcart.couponredemption': {
            'Meta': {'object_name': 'CouponRedemption'},
            'coupon': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['shoppingcart.Coupon']"}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'order': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['shoppingcart.Order']"}),
            'user': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['auth.User']"})
        },
        'shoppingcart.courseregcodeitem': {
            'Meta': {'object_name': 'CourseRegCodeItem', '_ormbases': ['shoppingcart.OrderItem']},
            'course_id': ('xmodule_django.models.CourseKeyField', [], {'max_length': '128', 'db_index': 'True'}),
            'mode': ('django.db.models.fields.SlugField', [], {'default': "'honor'", 'max_length': '50'}),
            'orderitem_ptr': ('django.db.models.fields.related.OneToOneField', [], {'to': "orm['shoppingcart.OrderItem']", 'unique': 'True', 'primary_key': 'True'})
        },
        'shoppingcart.courseregcodeitemannotation': {
            'Meta': {'object_name': 'CourseRegCodeItemAnnotation'},
            'annotation': ('django.db.models.fields.TextField', [], {'null': 'True'}),
            'course_id': ('xmodule_django.models.CourseKeyField', [], {'unique': 'True', 'max_length': '128', 'db_index': 'True'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'})
        },
        'shoppingcart.courseregistrationcode': {
            'Meta': {'object_name': 'CourseRegistrationCode'},
            'code': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '32', 'db_index': 'True'}),
            'course_id': ('xmodule_django.models.CourseKeyField', [], {'max_length': '255', 'db_index': 'True'}),
            'created_at': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime(2015, 1, 27, 0, 0)'}),
            'created_by': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "'created_by_user'", 'to': "orm['auth.User']"}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'invoice': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['shoppingcart.Invoice']", 'null': 'True'}),
            'invoice_item': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['shoppingcart.CourseRegistrationCodeInvoiceItem']", 'null': 'True'}),
            'mode_slug': ('django.db.models.fields.CharField', [], {'max_length': '100', 'null': 'True'}),
            'order': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "'purchase_order'", 'null': 'True', 'to': "orm['shoppingcart.Order']"})
        },
        'shoppingcart.courseregistrationcodeinvoiceitem': {
            'Meta': {'object_name': 'CourseRegistrationCodeInvoiceItem', '_ormbases': ['shoppingcart.InvoiceItem']},
            'course_id': ('xmodule_django.models.CourseKeyField', [], {'max_length': '128', 'db_index': 'True'}),
            'invoiceitem_ptr': ('django.db.models.fields.related.OneToOneField', [], {'to': "orm['shoppingcart.InvoiceItem']", 'unique': 'True', 'primary_key': 'True'})
        },
        'shoppingcart.donation': {
            'Meta': {'object_name': 'Donation', '_ormbases': ['shoppingcart.OrderItem']},
            'course_id': ('xmodule_django.models.CourseKeyField', [], {'max_length': '255', 'db_index': 'True'}),
            'donation_type': ('django.db.models.fields.CharField', [], {'default': "'general'", 'max_length': '32'}),
            'orderitem_ptr': ('django.db.models.fields.related.OneToOneField', [], {'to': "orm['shoppingcart.OrderItem']", 'unique': 'True', 'primary_key': 'True'})
        },
        'shoppingcart.donationconfiguration': {
            'Meta': {'object_name': 'DonationConfiguration'},
            'change_date': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'blank': 'True'}),
            'changed_by': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['auth.User']", 'null': 'True', 'on_delete': 'models.PROTECT'}),
            'enabled': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'})
        },
        'shoppingcart.invoice': {
            'Meta': {'object_name': 'Invoice'},
            'address_line_1': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
            'address_line_2': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
            'address_line_3': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
            'city': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True'}),
            'company_contact_email': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
            'company_contact_name': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
            'company_name': ('django.db.models.fields.CharField', [], {'max_length': '255', 'db_index': 'True'}),
            'country': ('django.db.models.fields.CharField', [], {'max_length': '64', 'null': 'True'}),
            'course_id': ('xmodule_django.models.CourseKeyField', [], {'max_length': '255', 'db_index': 'True'}),
            'created': ('model_utils.fields.AutoCreatedField', [], {'default': 'datetime.datetime.now'}),
            'customer_reference_number': ('django.db.models.fields.CharField', [], {'max_length': '63', 'null': 'True', 'blank': 'True'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'internal_reference': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
            'is_valid': ('django.db.models.fields.BooleanField', [], {'default': 'True'}),
            'modified': ('model_utils.fields.AutoLastModifiedField', [], {'default': 'datetime.datetime.now'}),
            'recipient_email': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
            'recipient_name': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
            'state': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True'}),
            'total_amount': ('django.db.models.fields.FloatField', [], {}),
            'zip': ('django.db.models.fields.CharField', [], {'max_length': '15', 'null': 'True'})
        },
        'shoppingcart.invoiceitem': {
            'Meta': {'object_name': 'InvoiceItem'},
            'created': ('model_utils.fields.AutoCreatedField', [], {'default': 'datetime.datetime.now'}),
            'currency': ('django.db.models.fields.CharField', [], {'default': "'usd'", 'max_length': '8'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'invoice': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['shoppingcart.Invoice']"}),
            'modified': ('model_utils.fields.AutoLastModifiedField', [], {'default': 'datetime.datetime.now'}),
            'qty': ('django.db.models.fields.IntegerField', [], {'default': '1'}),
            'unit_price': ('django.db.models.fields.DecimalField', [], {'default': '0.0', 'max_digits': '30', 'decimal_places': '2'})
        },
        'shoppingcart.invoicetransaction': {
            'Meta': {'object_name': 'InvoiceTransaction'},
            'amount': ('django.db.models.fields.DecimalField', [], {'default': '0.0', 'max_digits': '30', 'decimal_places': '2'}),
            'comments': ('django.db.models.fields.TextField', [], {'null': 'True'}),
            'created': ('model_utils.fields.AutoCreatedField', [], {'default': 'datetime.datetime.now'}),
            'created_by': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['auth.User']"}),
            'currency': ('django.db.models.fields.CharField', [], {'default': "'usd'", 'max_length': '8'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'invoice': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['shoppingcart.Invoice']"}),
            'last_modified_by': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "'last_modified_by_user'", 'to': "orm['auth.User']"}),
            'modified': ('model_utils.fields.AutoLastModifiedField', [], {'default': 'datetime.datetime.now'}),
            'status': ('django.db.models.fields.CharField', [], {'default': "'started'", 'max_length': '32'})
        },
        'shoppingcart.order': {
            'Meta': {'object_name': 'Order'},
            'bill_to_cardtype': ('django.db.models.fields.CharField', [], {'max_length': '32', 'blank': 'True'}),
            'bill_to_ccnum': ('django.db.models.fields.CharField', [], {'max_length': '8', 'blank': 'True'}),
            'bill_to_city': ('django.db.models.fields.CharField', [], {'max_length': '64', 'blank': 'True'}),
            'bill_to_country': ('django.db.models.fields.CharField', [], {'max_length': '64', 'blank': 'True'}),
            'bill_to_first': ('django.db.models.fields.CharField', [], {'max_length': '64', 'blank': 'True'}),
            'bill_to_last': ('django.db.models.fields.CharField', [], {'max_length': '64', 'blank': 'True'}),
            'bill_to_postalcode': ('django.db.models.fields.CharField', [], {'max_length': '16', 'blank': 'True'}),
            'bill_to_state': ('django.db.models.fields.CharField', [], {'max_length': '8', 'blank': 'True'}),
            'bill_to_street1': ('django.db.models.fields.CharField', [], {'max_length': '128', 'blank': 'True'}),
            'bill_to_street2': ('django.db.models.fields.CharField', [], {'max_length': '128', 'blank': 'True'}),
            'company_contact_email': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
            'company_contact_name': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
            'company_name': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
            'currency': ('django.db.models.fields.CharField', [], {'default': "'usd'", 'max_length': '8'}),
            'customer_reference_number': ('django.db.models.fields.CharField', [], {'max_length': '63', 'null': 'True', 'blank': 'True'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'order_type': ('django.db.models.fields.CharField', [], {'default': "'personal'", 'max_length': '32'}),
            'processor_reply_dump': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'purchase_time': ('django.db.models.fields.DateTimeField', [], {'null': 'True', 'blank': 'True'}),
            'recipient_email': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
            'recipient_name': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
            'refunded_time': ('django.db.models.fields.DateTimeField', [], {'null': 'True', 'blank': 'True'}),
            'status': ('django.db.models.fields.CharField', [], {'default': "'cart'", 'max_length': '32'}),
            'user': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['auth.User']"})
        },
        'shoppingcart.orderitem': {
            'Meta': {'object_name': 'OrderItem'},
            'created': ('model_utils.fields.AutoCreatedField', [], {'default': 'datetime.datetime.now'}),
            'currency': ('django.db.models.fields.CharField', [], {'default': "'usd'", 'max_length': '8'}),
            'fulfilled_time': ('django.db.models.fields.DateTimeField', [], {'null': 'True', 'db_index': 'True'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'line_desc': ('django.db.models.fields.CharField', [], {'default': "'Misc. Item'", 'max_length': '1024'}),
            'list_price': ('django.db.models.fields.DecimalField', [], {'null': 'True', 'max_digits': '30', 'decimal_places': '2'}),
            'modified': ('model_utils.fields.AutoLastModifiedField', [], {'default': 'datetime.datetime.now'}),
            'order': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['shoppingcart.Order']"}),
            'qty': ('django.db.models.fields.IntegerField', [], {'default': '1'}),
            'refund_requested_time': ('django.db.models.fields.DateTimeField', [], {'null': 'True', 'db_index': 'True'}),
            'report_comments': ('django.db.models.fields.TextField', [], {'default': "''"}),
            'service_fee': ('django.db.models.fields.DecimalField', [], {'default': '0.0', 'max_digits': '30', 'decimal_places': '2'}),
            'status': ('django.db.models.fields.CharField', [], {'default': "'cart'", 'max_length': '32', 'db_index': 'True'}),
            'unit_cost': ('django.db.models.fields.DecimalField', [], {'default': '0.0', 'max_digits': '30', 'decimal_places': '2'}),
            'user': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['auth.User']"})
        },
        'shoppingcart.paidcourseregistration': {
            'Meta': {'object_name': 'PaidCourseRegistration', '_ormbases': ['shoppingcart.OrderItem']},
            'course_enrollment': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['student.CourseEnrollment']", 'null': 'True'}),
            'course_id': ('xmodule_django.models.CourseKeyField', [], {'max_length': '128', 'db_index': 'True'}),
            'mode': ('django.db.models.fields.SlugField', [], {'default': "'honor'", 'max_length': '50'}),
            'orderitem_ptr': ('django.db.models.fields.related.OneToOneField', [], {'to': "orm['shoppingcart.OrderItem']", 'unique': 'True', 'primary_key': 'True'})
        },
        'shoppingcart.paidcourseregistrationannotation': {
            'Meta': {'object_name': 'PaidCourseRegistrationAnnotation'},
            'annotation': ('django.db.models.fields.TextField', [], {'null': 'True'}),
            'course_id': ('xmodule_django.models.CourseKeyField', [], {'unique': 'True', 'max_length': '128', 'db_index': 'True'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'})
        },
        'shoppingcart.registrationcoderedemption': {
            'Meta': {'object_name': 'RegistrationCodeRedemption'},
            'course_enrollment': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['student.CourseEnrollment']", 'null': 'True'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'order': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['shoppingcart.Order']", 'null': 'True'}),
            'redeemed_at': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime(2015, 1, 27, 0, 0)', 'null': 'True'}),
            'redeemed_by': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['auth.User']"}),
            'registration_code': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['shoppingcart.CourseRegistrationCode']"})
        },
        'student.courseenrollment': {
            'Meta': {'ordering': "('user', 'course_id')", 'unique_together': "(('user', 'course_id'),)", 'object_name': 'CourseEnrollment'},
            'course_id': ('xmodule_django.models.CourseKeyField', [], {'max_length': '255', 'db_index': 'True'}),
            'created': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'null': 'True', 'db_index': 'True', 'blank': 'True'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'is_active': ('django.db.models.fields.BooleanField', [], {'default': 'True'}),
            'mode': ('django.db.models.fields.CharField', [], {'default': "'honor'", 'max_length': '100'}),
            'user': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['auth.User']"})
        }
    }

    complete_apps = ['shoppingcart']
    symmetrical = True