#!/usr/bin/env bash
source ${TARGET_DEVSTACK_DIR}/lib/apache
source ${TARGET_DEVSTACK_DIR}/lib/database
source ${TARGET_DEVSTACK_DIR}/lib/keystone
source ${TARGET_DEVSTACK_DIR}/lib/nova
source ${TARGET_DEVSTACK_DIR}/lib/placement
source ${TARGET_DEVSTACK_DIR}/inc/ini-config
source ${TARGET_DEVSTACK_DIR}/inc/python

function configure_nova_upgrade() {

    # TODO(mriedem): Until https://review.openstack.org/#/c/600162/ merges
    # in devstack, we want to continue using placement from nova. We can
    # remove this once the devstack change lands.
    if [ -z "${PLACEMENT_REPO}" ]; then
        echo "devstack not new enough for extracted placement."
        return 0
    fi

    # NOTE(mriedem): We don't need to do any of this placement DB stuff
    # if PLACEMENT_DB_ENABLED=True from the old side.

    # Devstack on the Rocky side won't install the placement repo because
    # it didn't exist until Stein, so unless the CI infra (devstack-gate)
    # already cloned the repo, we have to git clone the repo here
    # to get the DB script.
    if [[ ! -d ${TARGET_RELEASE_DIR}/placement ]]; then
        git_clone ${PLACEMENT_REPO} \
        ${TARGET_RELEASE_DIR}/placement ${TARGET_DEVSTACK_BRANCH}
    fi
    # Install placement so that placement-api script exists
    setup_develop ${TARGET_RELEASE_DIR}/placement

    # Get the location of the placement DB migration script and
    # verify it exists.
    local db_script=${TARGET_RELEASE_DIR}/placement/tools/${DATABASE_TYPE}-migrate-db.sh
    if [[ ! -x ${db_script} ]]; then
        die $LINENO "${db_script} does not exist or is not executable."
    fi

    # Get our database variables set.
    initialize_database_backends

    # Write out the contents of placement.conf.
    # This should be done before executing the database migration script.
    local placement_conf_dir=/etc/placement
    sudo install -d -o ${STACK_USER} ${placement_conf_dir}
    local placement_conf=${placement_conf_dir}/placement.conf

    # NOTE(mriedem): iniset will create the config file if it does not exist
    # NOTE(cdent): new placement uses _only_ the 'placement_database' group
    # for explicitness.
    iniset ${placement_conf} placement_database connection `database_connection_url placement`

    # Configure logging options.
    setup_logging ${placement_conf}

    # Configure [keystone_authtoken] option and auth cache.
    sudo install -d -o $STACK_USER /var/cache/placement
    configure_auth_token_middleware ${placement_conf} placement /var/cache/placement

    # Copy the remaining non-keystoneauth [placement] group options from
    # nova.conf if set.
    for option in randomize_allocation_candidates incomplete_consumer_project_id incomplete_consumer_user_id; do
        local value=$(iniget ${NOVA_CONF} placement ${option})
        if [ ${value} ]; then
            iniset ${placement_conf} placement ${option} ${value}
        fi
    done

    # Write out the migrate-db.rc file.
    local rc_file=/tmp/migrate-db.rc
    touch ${rc_file}
    # $db_script is an absolute path so we can execute it directly.
    ${db_script} --mkconfig ${rc_file}
    sed -i s/NOVA_API_USER.*/NOVA_API_USER=\"${DATABASE_USER}\"/g ${rc_file}
    sed -i s/NOVA_API_PASS.*/NOVA_API_PASS=\"${DATABASE_PASSWORD}\"/g ${rc_file}
    sed -i s/PLACEMENT_USER.*/PLACEMENT_USER=\"${DATABASE_USER}\"/g ${rc_file}
    sed -i s/PLACEMENT_PASS.*/PLACEMENT_PASS=\"${DATABASE_PASSWORD}\"/g ${rc_file}

    # Create the placement database.
    recreate_database placement

    # Copy the placement-related table data from the nova_api database into
    # the placement database and "stamp" the database version to bring it
    # under alembic control. Note that stamping relies on the
    # `placement.conf` having `[placement_database]/connection` set first.
    ${db_script} --migrate ${rc_file}

    # Copy any policy overrides from nova. We assume yaml here since that is
    # the default in code, but it could also be a json file.
    local old_policy_file=${NOVA_CONF_DIR}/placement-policy.yaml
    if [[ -f ${old_policy_file} ]]; then
        local new_policy_file=${placement_conf_dir}/policy.yaml
        cp ${old_policy_file} ${new_policy_file}
        # Update the config to point at the renamed file.
        iniset ${placement_conf} placement policy_file ${new_policy_file}
    fi

    # Make adjustments to uwsgi and apache configuration so that we are
    # pointing to the right service and configuration.
    # TODO(cdent): We set our own values for this instead of values from
    # lib/placement because we're in a dependency catch-22 with devstack
    # changes. When both sides have merged we can replace these with globals.
    # PLACEMENT_BIN_DIR is okay because it is the same whether it comes from
    # old or new devstack code, as long as we are not in a virtualenv.
    # PLACEMENT_UWSGI_CONF is used as a global so that when start_placement
    # is called later, it has the right value.
    local placement_uwsgi=${PLACEMENT_BIN_DIR}/placement-api
    PLACEMENT_UWSGI_CONF=${placement_conf_dir}/placement-uwsgi.ini

    disable_apache_site nova-placement-api
    # This will enable_apache_site placement-api. The entry in the service
    # catalog remains the same.
    write_uwsgi_config "${PLACEMENT_UWSGI_CONF}" "${placement_uwsgi}" "/placement"
    # Grenade itself will ensure that placement is restarted, and when it does
    # that, a new systemd unit file, pointing to the right wsgi app, is created.
}