#!/bin/bash
set -e
set -u

: ${CI_BRANCH=""}
: ${UPLOAD_LATEST=""}

# cd to app root
CWD=$(dirname $0)
if [[ `basename $(pwd)` = 'scripts' ]]; then
  cd ../
else
  cd `dirname $CWD`
fi

# -------------------------------------

# Execute something and exit if it fails
function runCmd() {
  $@
  if [[ $? -ne 0 ]]; then
    echo "Command: $@ failed"
    exit 2
  fi
}

function printHelp() {
    cat 1>&2 <<EOF
build-static Usage:
  -d - Build debug instead of production build
  -f - Force: Turn off checks that prevent you from doing bad things
  -l - Build as "latest" instead of the version in package.json
  -t - Tag and push tag
  -u - Upload to GCE
  -v=VERSION - Force version to be VERSION instead of what is in package.json
EOF
  exit 1;
}

# -------------------------------------

# Parse options
BRANCH=$CI_BRANCH

if [[ -z "$BRANCH" ]]; then
  BRANCH=$(git symbolic-ref HEAD | sed -e "s/^refs\/heads\///")
fi

if [[ -z "$BRANCH" ]]; then
  BRANCH="master"
fi

PKG_VERSION=$(cat package.json | grep version | head -n 1 | cut -f4 -d'"')
FORCE=0
LATEST=0
UPLOAD=0
TAG=0
ENVIRONMENT="production"
: ${FORCE_VERSION:=""}

while getopts ":dlutfv:" opt;do
    case $opt in
    d)
        ENVIRONMENT="development"
        ;;
    f)
        FORCE=1
        ;;
    l)
        LATEST=1
        ;;
    t)
        TAG=1
        ;;
    u)
        UPLOAD=1
        ;;
    v)
        FORCE_VERSION=$OPTARG
        ;;
    \?)
        echo "Invalid arguemnt: ${OPTARG}"
        printHelp
        exit 1
        ;;
    :)
        echo "Option -${OPTARG} requires an argument." >&2
        printHelp
        exit 1
        ;;
    esac
done

# Why are you trying to do a build when there are uncommitted changes?
if [[ `git status --porcelain` ]]; then
  echo "There are uncommited changes.  Please check the number and try again."
  if [[ $FORCE -ne 1 ]]; then
    exit 1;
  fi
fi

# UPLOAD_LATEST=true is set by Drone for auto upload to CDN
if [[ "${BRANCH}" == "master" ]] && [[ "${UPLOAD_LATEST}" == "true" ]]; then
  UPLOAD=2
  LATEST=1
fi

# Sanity checking
if [[ $LATEST -eq 1 ]] && [[ $TAG -eq 1 ]]; then
  echo "You can't tag latest."
  if [[ $FORCE -ne 1 ]]; then
    exit 1;
  fi
fi

if ( [[ $TAG -eq 1 ]] || [[ $UPLOAD -ne 0 ]] ) && [[ "${BRANCH}" != "master" ]]; then
  echo "You can only tag or upload the master branch (you are on '${BRANCH}')."
  if [[ $FORCE -ne 1 ]]; then
    exit 1;
  fi
fi

if [[ "${FORCE_VERSION}" != "" ]]; then
  VERSION=${FORCE_VERSION}
else
  if [[ $LATEST -eq 1 ]]; then
    VERSION="latest"
  else
    VERSION=${PKG_VERSION}
  fi
fi

BUILD_PAR="dist/static"
BUILD_DIR="${BUILD_PAR}/${VERSION}"
BUILD_TGZ="${BUILD_PAR}/${VERSION}.tar.gz"
CDN="releases.rancher.com/ui"
GS_URL="gs://${CDN}"
CACHE="Cache-Control:no-cache,must-revalidate"
GZIP="html,js,css,xml,txt,map,svg,ttf,woff,woff2"
GCLOUD_UUID="google/cloud-sdk@sha256:506775439bd4f44d90a3f6784f2b625e55c43635f9f2c4cae24ac4b3dea0277a"

echo "Branch: ${BRANCH}"
if [[ "${VERSION}" != "${PKG_VERSION}" ]]; then
  echo "Package Version: ${PKG_VERSION}"
fi
echo "Version: ${VERSION}"
echo "Build Dir: ${BUILD_DIR}"
echo "Options: Force=${FORCE}, Latest=${LATEST}, Upload=${UPLOAD}, Tag=${TAG}"
echo "Current Directory: $(pwd)"

echo "Testing..."
runCmd ./node_modules/.bin/ember test --port 7999
echo "Done Testing."

if [[ $LATEST -ne 1 ]]; then
  echo "Building Static Tarball..."
  RANCHER_ENDPOINT="" runCmd ./node_modules/.bin/ember build --environment=${ENVIRONMENT} --output-path=${BUILD_DIR}

# Create a file containing the version
echo "${PKG_VERSION}" > ${BUILD_DIR}/VERSION.txt

# Create a tarball of the version
runCmd tar -czf ${BUILD_TGZ} -C ${BUILD_PAR} ${VERSION}
fi;

echo "Building Hosted Version..."
RANCHER_ENDPOINT="" BASE_ASSETS="//${CDN}/${VERSION}/" runCmd ./node_modules/.bin/ember build --environment=${ENVIRONMENT} --output-path=${BUILD_DIR}

# Create a file containing the version
echo "${PKG_VERSION}" > ${BUILD_DIR}/VERSION.txt

if [[ $TAG -eq 1 ]]; then
  runCmd git tag v${VERSION}
  runCmd git push --tags
fi

# For use on your laptop, manually
if [[ $UPLOAD -eq 1 ]]; then
  echo "Uploading..."
  if [[ $LATEST -eq 1 ]]; then
    runCmd gsutil -h "${CACHE}" -m cp -z "${GZIP}" -R ${BUILD_DIR} "${GS_URL}/_upload"
    runCmd gsutil -h "${CACHE}" rsync -c -r -d "${GS_URL}/_upload" "${GS_URL}/${VERSION}"
    runCmd gsutil rm -a -f -R "${GS_URL}/_upload"
  else
    runCmd gsutil -m cp ${BUILD_TGZ} ${GS_URL}
    runCmd gsutil -m cp -z "${GZIP}" -R ${BUILD_DIR} ${GS_URL}
  fi
fi

# For use from Drone, automatically
if [[ $UPLOAD -eq 2 ]]; then
  ABS_BUILD_DIR="$(pwd)/${BUILD_DIR}"
  echo "Updating latest ($ABS_BUILD_DIR) thru Docker..."

  # Upload new files, with gzip headers (rsync doesn't have this)
  runCmd docker run --rm -v $ABS_BUILD_DIR:/upload $GCLOUD_UUID gsutil -h "${CACHE}" -m cp -z "${GZIP}" -R /upload "${GS_URL}/_upload"

  # Rsync new files into latest diff
  # Beware of the leopard: -m will break rsync on versioned buckets.
  runCmd docker run --rm -v $ABS_BUILD_DIR:/upload $GCLOUD_UUID gsutil -h "${CACHE}" rsync -c -r "${GS_URL}/_upload" "${GS_URL}/${VERSION}"

  # Remove temp dir
  runCmd docker run --rm -v $ABS_BUILD_DIR:/upload $GCLOUD_UUID gsutil rm -a -f -R "${GS_URL}/_upload"
fi