#!/usr/bin/env bash
#
# Script to generate schemas for the various versions.
#
# Some setup is required, similar to the opportunistic tests.
#
# MySQL ->
#
# $ mysql -uroot
# MariaDB [(none)]> CREATE DATABASE nova
# MariaDB [(none)]> GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'localhost' IDENTIFIED BY 'password';
# MariaDB [(none)]> quit;
#
# Postgres ->
#
# $ sudo -u postgres psql
# postgres=# create user nova with createdb login password 'password';
# postgres=# create database nova with owner nova;
# postgres=# quit;
#
# Note that you may also have to configure 'pg_hba.conf' to use password-based
# auth instead of "ident", if you haven't done so already. You can locate this
# with 'locate pg_hba.conf'. More details at
# https://ubuntu.com/server/docs/databases-postgresql

set -o xtrace
set -e

source .tox/py36/bin/activate
pushd nova/db/sqlalchemy/migrate_repo

INIT_VERSION=$(ls -1 versions/ | head -1 | awk -F_ '{print $1}')
INIT_VERSION=$(($INIT_VERSION-1))

echo "Detected init version of $INIT_VERSION"

mkdir -p schemas
rm -f "schemas/$INIT_VERSION-*.sql"

#
# sqlite
#

# cleanup from previous runs

rm -f nova.db

# sync schema

python manage.py version_control \
    --database 'sqlite:///nova.db' \
    --version $INIT_VERSION

python manage.py upgrade \
    --database 'sqlite:///nova.db'

# dump the schema

sqlite3 nova.db << EOF
.output "schemas/${INIT_VERSION}-sqlite.sql"
.schema
.quit
EOF

rm -f nova.db

#
# mysql
#

# cleanup from previous runs

mysql -u nova -ppassword << EOF
DROP DATABASE IF EXISTS nova;
CREATE DATABASE nova;
EOF

# sync schema

python manage.py version_control \
    --database 'mysql+pymysql://nova:password@localhost/nova' \
    --version "$INIT_VERSION"

python manage.py upgrade \
    --database 'mysql+pymysql://nova:password@localhost/nova'

# dump the schema

mysqldump --no-data --skip-comments -u nova -ppassword \
    nova > "schemas/${INIT_VERSION}-mysql.sql"

mysql -u nova -ppassword << EOF
DROP DATABASE IF EXISTS nova;
EOF


#
# postgres
#

# cleanup from previous runs

sudo -u postgres dropdb --if-exists nova
sudo -u postgres createdb --owner=nova nova

# sync to initial version

python manage.py version_control \
    --database 'postgresql://nova:password@localhost/nova' \
    --version "$INIT_VERSION"

python manage.py upgrade \
    --database 'postgresql://nova:password@localhost/nova'

# dump the schema

pg_dump postgresql://nova:password@localhost/nova \
    --schema-only > "schemas/${INIT_VERSION}-postgres.sql"

sudo -u postgres dropdb --if-exists nova

popd
deactivate