#!/usr/bin/env bash

SCRIPT_DIR="$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
BASE_DIR="$( cd $SCRIPT_DIR && cd .. & pwd)"

CYAN="\033[96m"
YELLOW="\033[93m"
RESET="\033[0m"
BOLD="\033[1m"
NORMAL="\033[22m"
CHECK="\xE2\x9C\x94"

ORG=rancher
BRANCH=main
CLEAN=false

usage() {
  echo "Usage: $0 [<options>]"
  echo " options:"
  echo "  [-c | --clean]                   Clean the current extension assets including: ./{charts, assets, extensions, icons}"
  echo "  [-o | --org] <name>              Specify the organization of the current repository (defaults to 'rancher')"
  echo "  [-b | --branch] <name>           Specify the destination branch of the extension assets within the current repository (defaults to 'main')"
  exit 1
}

while [[ $# -gt 0 ]]; do
  case "$1" in
    -h|--help)
      usage
      ;;
    -o|--org)
      if [[ -z $2 || $2 == -* ]]; then
        echo "Error: Missing argument for $1 option"
        usage
      fi
      ORG="${2}"
      shift 2
      ;;
    -c|--clean)
      CLEAN=true
      shift
      ;;
    -b|--branch)
      if [[ -z $2 || $2 == -* ]]; then
        echo "Error: Missing argument for $1 option"
        usage
      fi
      BRANCH="${2}"
      shift 2
      ;;
    *)
      echo "Error: Unknown option $1"
      usage
      ;;
  esac
done

shift $((OPTIND-1))

if [[ $CLEAN == true ]]; then
  rm -rf ./charts
  rm -rf ./assets
  rm -rf ./extensions
  rm -rf ./icons
fi

echo -e "${CYAN}${BOLD}Syncing Extensions${RESET}"

EXTS=$(jq -r ".extensions | keys[]" manifest.json)

TMP=${BASE_DIR}/tmp
rm -rf ${TMP}
mkdir -p ${TMP}

HELM_INDEX=${BASE_DIR}/index.yaml
CHART_TMP=${TMP}/_charts

REPOSITORY=${ORG}/partner-extensions

echo "GitHub Repository: ${REPOSITORY}"
echo "GitHub Branch:     ${BRANCH}"

for NAME in ${EXTS}
do
  echo -e "${CYAN} + Syncing: ${BOLD}${NAME}${RESET}"

  # Make diretories for assets, charts, and extensions
  mkdir -p ./assets/${NAME}
  mkdir -p ./charts/${NAME}
  mkdir -p ./extensions/${NAME}

  # Get repository name, branch, and versions 
  REPO=$(jq -r ".extensions.${NAME}.repo" manifest.json)
  EXT_BRANCH=$(jq -r ".extensions.${NAME}.branch" manifest.json)
  VERSIONS=$(jq -r ".extensions.${NAME}.versions[]" manifest.json)
  VFORMAT=$(echo $VERSIONS | tr '\n' ' ')

  echo -e "     Repository: ${REPO}"
  echo -e "     Branch: ${EXT_BRANCH}"
  echo -e "     Versions  : ${VFORMAT}"
  echo ""

  echo -e "  .. Cloning repository"
  rm -rf ./tmp/${NAME}
  pushd tmp > /dev/null
  git clone https://github.com/${REPO}.git ${NAME}
  cd ${NAME}
  git checkout ${EXT_BRANCH}
  pwd
  popd > /dev/null

  for VERSION in ${VERSIONS}
  do
    echo -e "${CYAN}     Syncing: ${BOLD}${NAME}@${VERSION}${RESET}"

    if [ -d "./charts/${NAME}/${VERSION}" ]; then
      echo "      Version already synced"
    else
      echo "     + Copying version ${VERSION}"
      # cp ./tmp/${NAME}/extensions/${NAME}/${NAME}-${VERSION}.tgz ./assets/${NAME}
      cp -R ./tmp/${NAME}/extensions/${NAME}/${VERSION} ./extensions/${NAME}/${VERSION}
      cp -R ./tmp/${NAME}/charts/${NAME}/${VERSION} ./charts/${NAME}/${VERSION}

      # Need to patch the charts
      echo "     + Patching Helm chart"
      CR_FILE=./charts/${NAME}/${VERSION}/templates/cr.yaml
      ENDPOINT=https://raw.githubusercontent.com/${REPOSITORY}/${BRANCH}/extensions/${NAME}/${VERSION}
      sed -i.bak -e 's@endpoint:.*@endpoint: '"$ENDPOINT"'@' ${CR_FILE}
      rm -f ${CR_FILE}.bak

      echo "     + Fetching and patching icon"

      # Check the chart file for an icon
      CHART_FILE=./charts/${NAME}/${VERSION}/Chart.yaml

      ICON=$(sed -nr 's/icon: (.*)/\1/p' ${CHART_FILE})
      
      if [ -n "${ICON}" ]; then
        # Downloading icon
        ICON_FILE=$(basename $ICON)
        echo "     + Fetching icon: ${ICON}"
        ICON_REL=icons/${NAME}/${VERSION}-${ICON_FILE}
        mkdir -p ${BASE_DIR}/icons/${NAME}
        rm -f ${BASE_DIR}/${ICON_REL}
        wget --quiet -O ${BASE_DIR}/${ICON_REL} ${ICON}

        NEW_ICON=https://raw.githubusercontent.com/${REPOSITORY}/${BRANCH}/${ICON_REL}

        sed -i.bak -e 's@icon:.*@icon: '"$NEW_ICON"'@' ${CHART_FILE}
        rm -rf ${CHART_FILE}.bak

        PKG_FILE=${BASE_DIR}/extensions/${NAME}/${VERSION}/plugin/package.json
        sed -i.bak -e 's@\"icon\": \".*\"@\"icon\": \"'"$NEW_ICON"'\"@' ${PKG_FILE}
        rm -rf ${PKG_FILE}.bak
      fi

      echo "     + Packaging Helm chart"
      helm package ./charts/${NAME}/${VERSION} -d ./assets/${NAME}

      echo "     + Updating Helm index"

      # --------------------------------------------------------------------------------
      # Update the helm index just for this chart 
      # --------------------------------------------------------------------------------
      if [ -f "${HELM_INDEX}" ]; then
        UPDATE="--merge ${HELM_INDEX}"
      fi

      # Base URL referencing assets directly from GitHub
      BASE_URL="assets/${NAME}"

      rm -rf ${CHART_TMP}
      mkdir -p ${CHART_TMP}
      cp ${BASE_DIR}/assets/${NAME}/${NAME}-${VERSION}.tgz ${CHART_TMP}

      helm repo index ${CHART_TMP} --url ${BASE_URL} ${UPDATE}

      cp ${CHART_TMP}/index.yaml ${HELM_INDEX}
    fi
  done

  echo ""
done

# Clean up
rm -rf ${CHART_TMP}
rm -rf ${TMP}