# Generated by Django 1.11.20 on 2019-05-09 06:54

from typing import Any, Dict, Optional

from django.db import migrations, models
from django.db.backends.postgresql.schema import DatabaseSchemaEditor
from django.db.migrations.state import StateApps

# We include a copy of this structure as it was at the time this
# migration was merged, since future should not impact the migration.
VIDEO_CHAT_PROVIDERS = {
    'jitsi_meet': {
        'name': "Jitsi",
        'id': 1
    },
    'google_hangouts': {
        'name': "Google Hangouts",
        'id': 2
    },
    'zoom': {
        'name': "Zoom",
        'id': 3
    }
}
def get_video_chat_provider_detail(providers_dict: Dict[str, Dict[str, Any]],
                                   p_name: Optional[str]=None, p_id: Optional[int]=None
                                   ) -> Dict[str, Any]:
    for provider in providers_dict.values():
        if (p_name and provider['name'] == p_name):
            return provider
        if (p_id and provider['id'] == p_id):
            return provider
    return dict()

def update_existing_video_chat_provider_values(apps: StateApps, schema_editor: DatabaseSchemaEditor) -> None:
    Realm = apps.get_model('zerver', 'Realm')

    for realm in Realm.objects.all():
        realm.video_chat_provider = get_video_chat_provider_detail(
            VIDEO_CHAT_PROVIDERS,
            p_name=realm.video_chat_provider_old)['id']
        realm.save(update_fields=["video_chat_provider"])

def reverse_code(apps: StateApps, schema_editor: DatabaseSchemaEditor) -> None:
    Realm = apps.get_model("zerver", "Realm")

    for realm in Realm.objects.all():
        realm.video_chat_provider_old = get_video_chat_provider_detail(
            VIDEO_CHAT_PROVIDERS,
            p_id=realm.video_chat_provider)['name']
        realm.save(update_fields=["video_chat_provider_old"])

class Migration(migrations.Migration):
    atomic = False

    dependencies = [
        ('zerver', '0223_rename_to_is_muted'),
    ]

    operations = [
        migrations.RenameField(
            model_name='realm',
            old_name='video_chat_provider',
            new_name='video_chat_provider_old',
        ),
        migrations.AddField(
            model_name='realm',
            name='video_chat_provider',
            field=models.PositiveSmallIntegerField(default=VIDEO_CHAT_PROVIDERS['jitsi_meet']['id']),
        ),
        migrations.RunPython(update_existing_video_chat_provider_values,
                             reverse_code=reverse_code,
                             elidable=True),
        migrations.RemoveField(
            model_name='realm',
            name='video_chat_provider_old',
        ),
    ]