#!/bin/bash

# Bring in the variables from SOLUTION file, supporting
# nested substitution
. SOLUTION

VARS=($(sed -nE "s,(^[^#][^=]*).*$,\1,pg" SOLUTION))
for var in ${VARS[@]}; do
  export ${var}
done

RELEASE_INFO=${RELEASE_INFO:-N/A}
if [[ "${RELEASE_INFO}" == "N/A" ]]; then
  TAG=${TAG:-${OS_DISTRO}-${PACKAGE_STREAM}-$(date +%Y%m%d)}
else
  TAG=${TAG:-${OS_DISTRO}-${PACKAGE_STREAM}-${RELEASE_INFO}}
fi

# The "TARGET_TAG" is intended to not be a unique tag; it should
# be replaced with each build.
if [[ "${BUILD}" != "" ]] && [[ "${BUILD}" != "N/A" ]]; then
  TARGET_TAG="${OS_DISTRO}-${OS_RELEASE}-${BRANCH}"
else
  TARGET_TAG="${OS_DISTRO}-${PACKAGE_STREAM}"
fi

function fail {
  >&2 echo "$*"
  exit -1
}

cat << EOF

The following will publish latest rolling image:

1. Pull ${CONTAINER}:${TAG}
2. Tag #1 as ${CONTAINER}:${TARGET_TAG}
3. Tag #1 as ${CONTAINER}:latest-${TARGET_TAG}
4. Delete ${CONTAINER}:${TAG}
5. Push #2
6. Push #3

EOF

echo "Pulling ${REGISTRY_URL}/${CONTAINER}:${TAG}"
docker pull ${REGISTRY_URL}/${CONTAINER}:${TAG} ||
  fail "Unable to pull image"

echo "Tagging as ...:${TARGET_TAG}"
docker tag ${REGISTRY_URL}/${CONTAINER}:${TAG} \
  ${REGISTRY_URL}/${CONTAINER}:${TARGET_TAG} ||
  fail "Unable to tag image (1/2)"

echo "Tagging as ...:latest-${TARGET_TAG}"
docker tag ${REGISTRY_URL}/${CONTAINER}:${TAG} \
  ${REGISTRY_URL}/${CONTAINER}:latest-${TARGET_TAG} ||
  fail "Unable to tag image (2/2)"

# Parse out the FQDN from the REGISTRY_URL and escape
# the group/project/path
FQDN=${REGISTRY_URL%%/*}
PROJECT=$(echo ${REGISTRY_URL#*/}/${CONTAINER} | sed s,/,%2F,g)

HEADER="Authorization:Basic $(echo -n "${HARBOR_USER}:${HARBOR_PASSWD}" | base64)"

delete_tag() {
  _project=$1
  _repository=$2
  _tag=$3
  _fqdn=${REGISTRY_URL%%/*}
  _repository=${_repository//\//%2F}
  curl --noproxy '*' -s -k \
    -i \
    -X DELETE \
    -H "${HEADER}" \
    -H "accept: application/json" \
    "https://${_fqdn}/api/v2.0/projects/${_project}/repositories/${_repository}/artifacts/${_tag}"

# To just delete the tag and not the image, use:
#    "https://${_fqdn}/api/v2.0/projects/${_project}/repositories/${_repository}/artifacts/${_tag}/tags/${_tag}"
}

echo -e "Deleting tag:\n  vtt-osgc solutions/${CONTAINER}:${TAG}\nFrom:\n  ${PROJECT}"

RESULTS=$(delete_tag vtt-osgc solutions/${CONTAINER} ${TAG})

if echo ${RESULTS} | grep -q "HTTP.*200"; then
  echo "Tag deleted successfully."
  break
else
  echo "Error deleting tag:" >&2
  echo "${RESULTS}" >&2
fi

iter=5
while (( iter )); do
  echo "Pushing as ...:${TARGET_TAG}"
  if docker push ${REGISTRY_URL}/${CONTAINER}:${TARGET_TAG}; then
    break
  fi
  echo "Unable to push ${CONTAINER}:${TARGET_TAG}" >&2
  iter=$((iter-1))
  if (( ! iter )); then
    fail "No more tries."
  fi
  echo "Waiting 10s before trying again..."
  sleep 10
done

iter=5
while (( iter )); do
  echo "Pushing as ...:latest-${TARGET_TAG}"
  if docker push ${REGISTRY_URL}/${CONTAINER}:latest-${TARGET_TAG}; then
    break
  fi
  echo "Unable to push ${CONTAINER}:latest-${TARGET_TAG}"
  iter=$((iter-1))
  if (( ! iter )); then
    fail "No more tries."
  fi
  echo "Waiting 10s before trying again..."
  sleep 10
done

echo "Done tagging and pushing ${CONTAINER} as ${TARGET_TAG}"