#!/bin/bash
# Copyright 2021-2023 H2020 TeraFlow (https://www.teraflow-h2020.eu/)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


########################################################################################################################
# Read deployment settings
########################################################################################################################

# If not already set, set the list of components you want to build images for, and deploy.
# By default, only basic components are deployed
export TFS_COMPONENTS=${TFS_COMPONENTS:-"context device monitoring service compute webui"}

# If not already set, set the name of the Kubernetes namespace to deploy to.
export TFS_K8S_NAMESPACE=${TFS_K8S_NAMESPACE:-"tfs"}

########################################################################################################################
# Automated steps start here
########################################################################################################################

echo "Deploying components and collecting environment variables..."
ENV_VARS_SCRIPT=tfs_runtime_env_vars.sh
echo "# Environment variables for TeraFlowSDN deployment" > $ENV_VARS_SCRIPT
PYTHONPATH=$(pwd)/src
echo "export PYTHONPATH=${PYTHONPATH}" >> $ENV_VARS_SCRIPT

for COMPONENT in $TFS_COMPONENTS; do
    echo "  Collecting env-vars for '$COMPONENT' component..."

    SERVICE_DATA=$(kubectl get service ${COMPONENT}service --namespace $TFS_K8S_NAMESPACE -o json)
    if [ -z "${SERVICE_DATA}" ]; then continue; fi

    # Env vars for service's host address
    SERVICE_HOST=$(echo ${SERVICE_DATA} | jq -r '.spec.clusterIP')
    if [ -z "${SERVICE_HOST}" ]; then continue; fi
    ENVVAR_HOST=$(echo "${COMPONENT}service_SERVICE_HOST" | tr '[:lower:]' '[:upper:]')
    echo "export ${ENVVAR_HOST}=${SERVICE_HOST}" >> $ENV_VARS_SCRIPT

    # Env vars for service's 'grpc' port (if any)
    SERVICE_PORT_GRPC=$(echo ${SERVICE_DATA} | jq -r '.spec.ports[] | select(.name=="grpc") | .port')
    if [ -n "${SERVICE_PORT_GRPC}" ]; then
        ENVVAR_PORT_GRPC=$(echo "${COMPONENT}service_SERVICE_PORT_GRPC" | tr '[:lower:]' '[:upper:]')
        echo "export ${ENVVAR_PORT_GRPC}=${SERVICE_PORT_GRPC}" >> $ENV_VARS_SCRIPT
    fi

    # Env vars for service's 'http' port (if any)
    SERVICE_PORT_HTTP=$(echo ${SERVICE_DATA} | jq -r '.spec.ports[] | select(.name=="http") | .port')
    if [ -n "${SERVICE_PORT_HTTP}" ]; then
        ENVVAR_PORT_HTTP=$(echo "${COMPONENT}service_SERVICE_PORT_HTTP" | tr '[:lower:]' '[:upper:]')
        echo "export ${ENVVAR_PORT_HTTP}=${SERVICE_PORT_HTTP}" >> $ENV_VARS_SCRIPT
    fi

    printf "\n"
done

echo "Done!"