#!/bin/bash

# ============LICENSE_START=======================================================
#  Copyright (C) 2020 The Nordix Foundation. All rights reserved.
# ================================================================================
# 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.
#
# SPDX-License-Identifier: Apache-2.0
# ============LICENSE_END=========================================================

set -o errexit
set -o pipefail
set -o nounset

# navigate to root of the git clone
#cd "$WORKSPACE"

echo "Info  : Identifying PR"
# get the PR no
GITHUB_PR_NO=$(git show --pretty=format:%s --quiet | awk -F'[#)]' '{print $2}')

# skip commenting if the commit is not created using PR
if [[ -z "$GITHUB_PR_NO" ]]; then
  echo "Info  : The commit is not connected to a PR. Will not post comment to GitHub!"
  exit 0
fi

# construct the URLs
GITHUB_PR_HTTP_URL="$GITHUB_BASE_URL/$PROJECT/pull/$GITHUB_PR_NO"
GITHUB_PR_API_URL="$GITHUB_API_URL/$PROJECT/pulls/$GITHUB_PR_NO/reviews"
IMAGE_NAME_TAG="$NORDIX_REGISTRY/$HARBOR_EIFFEL_PROJECT/$PROJECT:$IMAGE_TAG"

# log PR no to console
echo "Info  : PR and API URLs"
echo "        $GITHUB_PR_HTTP_URL"
echo "        $GITHUB_PR_API_URL"

# get build status
BUILD_STATUS=$(curl -s "$BUILD_URL/api/json?pretty=true" | grep result | awk -F'[""]' '{print $4}')
echo "Info  : Build status is $BUILD_STATUS"

# file to store PR comment
GITHUB_PR_COMMENT_FILE="/tmp/pr_comment.txt.$$"
/bin/rm -rf "$GITHUB_PR_COMMENT_FILE"

# construct the comment body depending on build status
if [[ "$BUILD_STATUS" == "SUCCESS" ]]; then
  cat << EOF >> "$GITHUB_PR_COMMENT_FILE"
{
  "event": "COMMENT",
  "body": "
- Build Status: **$BUILD_STATUS**\n
- Build URL: [Nordix Jenkins]($BUILD_URL)\n
- Command to pull image:\n
    \`docker pull $IMAGE_NAME_TAG\`\n
    or\n
    \`podman pull $IMAGE_NAME_TAG\`
"
}
EOF
else
  cat << EOF >> "$GITHUB_PR_COMMENT_FILE"
{
  "event": "COMMENT",
  "body": "
- Build Status: **$BUILD_STATUS**\n
- Build URL: [Nordix Jenkins]($BUILD_URL)\n
"
}
EOF
fi

# construct the full comment
echo "Info  : PR comment"
echo "----------------------------------------------------------------"
cat "$GITHUB_PR_COMMENT_FILE"
echo "----------------------------------------------------------------"
echo
echo "Info  : Command to send PR comment"
echo "----------------------------------------------------------------"
echo "curl -s -u \"username:password\" -X POST -H \"Accept: application/vnd.github.v3+json\" \"$GITHUB_PR_API_URL\" -d \"@${GITHUB_PR_COMMENT_FILE}\""
echo "----------------------------------------------------------------"

curl -s -u "${NORDIXINFRA_GITHUB_USERNAME}:${NORDIXINFRA_GITHUB_TOKEN}" -X POST \
    -H \"Accept: application/vnd.github.v3+json\" "$GITHUB_PR_API_URL" -d "@${GITHUB_PR_COMMENT_FILE}"

# remove the file
/bin/rm -rf "$GITHUB_PR_COMMENT_FILE"

# vim: set ts=2 sw=2 expandtab: