# Generated by Django 2.2.13 on 2020-10-19 12:01

from django.db import migrations, models
import django.db.models.deletion
import uuid


CATEGORY_DB_LIST = ['mysql', 'oracle', 'postgresql', 'mariadb']
CATEGORY_REMOTE_LIST = ['chrome', 'mysql_workbench', 'vmware_client', 'custom']
CATEGORY_CLOUD_LIST = ['k8s']

CATEGORY_DB = 'db'
CATEGORY_REMOTE = 'remote_app'
CATEGORY_CLOUD = 'cloud'
CATEGORY_LIST = [CATEGORY_DB, CATEGORY_REMOTE, CATEGORY_CLOUD]


def get_application_category(old_app):
    _type = old_app.type
    if _type in CATEGORY_DB_LIST:
        category = CATEGORY_DB
    elif _type in CATEGORY_REMOTE_LIST:
        category = CATEGORY_REMOTE
    elif _type in CATEGORY_CLOUD_LIST:
        category = CATEGORY_CLOUD
    else:
        category = None
    return category


def common_to_application_json(old_app):
    category = get_application_category(old_app)
    date_updated = old_app.date_updated if hasattr(old_app, 'date_updated') else old_app.date_created
    return {
        'id': old_app.id,
        'name': old_app.name,
        'type': old_app.type,
        'category': category,
        'comment': old_app.comment,
        'created_by': old_app.created_by,
        'date_created': old_app.date_created,
        'date_updated': date_updated,
        'org_id': old_app.org_id
    }


def db_to_application_json(database):
    app_json = common_to_application_json(database)
    app_json.update({
        'attrs': {
            'host': database.host,
            'port': database.port,
            'database': database.database
        }
    })
    return app_json


def remote_to_application_json(remote):
    app_json = common_to_application_json(remote)
    attrs = {
        'asset': str(remote.asset.id),
        'path': remote.path,
    }
    attrs.update(remote.params)
    app_json.update({
        'attrs': attrs
    })
    return app_json


def k8s_to_application_json(k8s):
    app_json = common_to_application_json(k8s)
    app_json.update({
        'attrs': {
            'cluster': k8s.cluster
        }
    })
    return app_json


def migrate_and_integrate_applications(apps, schema_editor):
    db_alias = schema_editor.connection.alias

    database_app_model = apps.get_model("applications", "DatabaseApp")
    remote_app_model = apps.get_model("applications", "RemoteApp")
    k8s_app_model = apps.get_model("applications", "K8sApp")

    database_apps = database_app_model.objects.using(db_alias).all()
    remote_apps = remote_app_model.objects.using(db_alias).all()
    k8s_apps = k8s_app_model.objects.using(db_alias).all()

    database_applications = [db_to_application_json(db_app) for db_app in database_apps]
    remote_applications = [remote_to_application_json(remote_app) for remote_app in remote_apps]
    k8s_applications = [k8s_to_application_json(k8s_app) for k8s_app in k8s_apps]

    applications_json = database_applications + remote_applications + k8s_applications
    application_model = apps.get_model("applications", "Application")
    applications = [
        application_model(**application_json)
        for application_json in applications_json
        if application_json['category'] in CATEGORY_LIST
    ]
    for application in applications:
        if application_model.objects.using(db_alias).filter(name=application.name).exists():
            application.name = '{}-{}'.format(application.name, application.type)
        application.save()


class Migration(migrations.Migration):

    dependencies = [
        ('assets', '0057_fill_node_value_assets_amount_and_parent_key'),
        ('applications', '0005_k8sapp'),
    ]

    operations = [
        migrations.CreateModel(
            name='Application',
            fields=[
                ('org_id', models.CharField(blank=True, db_index=True, default='', max_length=36, verbose_name='Organization')),
                ('id', models.UUIDField(default=uuid.uuid4, primary_key=True, serialize=False)),
                ('created_by', models.CharField(blank=True, max_length=32, null=True, verbose_name='Created by')),
                ('date_created', models.DateTimeField(auto_now_add=True, null=True, verbose_name='Date created')),
                ('date_updated', models.DateTimeField(auto_now=True, verbose_name='Date updated')),
                ('name', models.CharField(max_length=128, verbose_name='Name')),
                ('category', models.CharField(choices=[('db', 'Database'), ('remote_app', 'Remote app'), ('cloud', 'Cloud')], max_length=16, verbose_name='Category')),
                ('type', models.CharField(choices=[('mysql', 'MySQL'), ('oracle', 'Oracle'), ('postgresql', 'PostgreSQL'), ('mariadb', 'MariaDB'), ('chrome', 'Chrome'), ('mysql_workbench', 'MySQL Workbench'), ('vmware_client', 'vSphere Client'), ('custom', 'Custom'), ('k8s', 'Kubernetes')], max_length=16, verbose_name='Type')),
                ('attrs', models.JSONField(default=dict)),
                ('comment', models.TextField(blank=True, default='', max_length=128, verbose_name='Comment')),
                ('domain', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='applications', to='assets.Domain', verbose_name='Domain')),
            ],
            options={
                'ordering': ('name',),
                'unique_together': {('org_id', 'name')},
            },
        ),
        migrations.RunPython(migrate_and_integrate_applications),
    ]