# Generated by Django 2.2.28 on 2022-08-31 20:26

import datetime
import json

from zoneinfo import ZoneInfo

from django.db import migrations


TZ_BEFORE = ZoneInfo('PST8PDT')


def forward(apps, schema_editor):
    DeletedEvent = apps.get_model('doc', 'DeletedEvent')
    for deleted_event in DeletedEvent.objects.all():
        fields = json.loads(deleted_event.json)
        replacements = {}
        for k, v in fields.items():
            if isinstance(v, str):
                try:
                    dt = datetime.datetime.strptime(v, '%Y-%m-%d %H:%M:%S')
                except:
                    pass
                else:
                    replacements[k] = dt.replace(tzinfo=TZ_BEFORE).astimezone(datetime.timezone.utc).isoformat()
        if len(replacements) > 0:
            fields.update(replacements)
            deleted_event.json = json.dumps(fields)
            deleted_event.save()


def reverse(apps, schema_editor):
    DeletedEvent = apps.get_model('doc', 'DeletedEvent')
    for deleted_event in DeletedEvent.objects.all():
        fields = json.loads(deleted_event.json)
        replacements = {}
        for k, v in fields.items():
            if isinstance(v, str) and 'T' in v:
                try:
                    dt = datetime.datetime.fromisoformat(v)
                except:
                    pass
                else:
                    replacements[k] = dt.astimezone(TZ_BEFORE).replace(tzinfo=None).strftime('%Y-%m-%d %H:%M:%S')
        if len(replacements) > 0:
            fields.update(replacements)
            deleted_event.json = json.dumps(fields)
            deleted_event.save()


class Migration(migrations.Migration):

    dependencies = [
        ('doc', '0045_use_timezone_now_for_doc_models'),
        ('utils', '0003_pause_to_change_use_tz'),
    ]

    operations = [
        migrations.RunPython(forward, reverse),
    ]