#!/bin/bash
##############################################################################
#
#   Copyright (c) 2019 AT&T Intellectual Property.
#
#   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.
#
##############################################################################
# Verifies RIC helm charts
# Requires Linux with wget and tar.
# This script should be executed inside the ric-plt/ric-dep bin directory only.
set -eu
echo "--> verify-ric-charts"


# (Optional) provide HELMVERSION as first parameter. It selects the helm client version
# (Optional) provide OVERRIDEYAML as the second parameter. It allows us to specify an override file to replace values used to render the helm charts
if [[ "${1:-nope}" != "nope" ]]; then
    HELMVERSION=$1
else
    HELMVERSION=2.17.0
fi
if [[ "${2:-nope}" != "nope" ]]; then
    OVERRIDEYAML=$2
fi

ROOT_DIR="$(pwd)"
HELM_COMMAND=helm

if ! $($HELM_COMMAND > /dev/null);then
    echo "Download and install Helm"
    if [ ! -e helm-v${HELMVERSION}-linux-amd64.tar.gz ]; then
      wget -nv https://storage.googleapis.com/kubernetes-helm/helm-v${HELMVERSION}-linux-amd64.tar.gz
    fi
    tar -xvf ./helm-v${HELMVERSION}-linux-amd64.tar.gz
    mv linux-amd64/helm ./
    HELM_COMMAND=./helm
    $HELM_COMMAND init -c
fi
# Set up ric common template
# Download it/dep common template charts
git clone --single-branch --branch master "https://gerrit.o-ran-sc.org/r/it/dep" ./dep

# Start Helm local repo if there isn't one
if [ ! -z $(pgrep "$HELM_COMMAND") ]; then
    echo "Stopping existing local Helm server."
    kill -9 "$(pgrep "$HELM_COMMAND")"
fi
if [ ! -d ./charts ]; then
    mkdir ./charts
fi
echo "Starting local Helm server"
nohup $HELM_COMMAND serve --repo-path charts >& /dev/null &
# Package ric-common and serve it using Helm local repo
$HELM_COMMAND package --save=false -d ./charts "$ROOT_DIR/dep/ric-common/Common-Template/helm/ric-common"
$HELM_COMMAND package --save=false -d ./charts "$ROOT_DIR/dep/ric-common/Common-Template/helm/aux-common"
$HELM_COMMAND repo index ./charts
# Make sure that helm local repo is added
$HELM_COMMAND repo remove local
$HELM_COMMAND repo remove stable
$HELM_COMMAND repo add local http://127.0.0.1:8879/charts
# Remove it/dep charts
rm -rf ./dep

# Create array of helm charts
echo "Finding all Helm charts"
CHART_ARRAY=()
while IFS= read -r -d $'\0'; do
    CHART_ARRAY+=("$REPLY")
done < <(find "$ROOT_DIR/../" -maxdepth 4 -name Chart.yaml -printf '%h\0')

echo "***************************************"
for dir in "${CHART_ARRAY[@]}"
do
    echo "Running helm lint and verification on chart $dir"
    echo "Update chart dependency"
    $HELM_COMMAND dep up "$dir"
    # Lint clearly marks errors; e.g., [ERROR]
    echo "Performing Helm lint"
    if [[ "${OVERRIDEYAML:-nope}" != "nope" ]]; then
        $HELM_COMMAND lint -f "$OVERRIDEYAML" "$dir"
    else
        $HELM_COMMAND lint "$dir" 
    fi
    echo "***************************************************************************************************************"
    echo "Rendering Helm charts locally"
    if [[ "${OVERRIDEYAML:-nope}" != "nope" ]]; then
	$HELM_COMMAND template -f "$OVERRIDEYAML" "$dir"
    else
        $HELM_COMMAND template "$dir"
    fi
    echo "***************************************************************************************************************"
done
echo "--> verify-ric-charts ends"
exit 0