#!/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:
  -l - Build as "latest" instead of the version in package.json
  -u - Upload to GCE
  -t - Tag and push tag
EOF
  exit 1;
}

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

# 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."
  exit 1;
fi

echo "Environment Variables:"
env

# 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 | cut -f4 -d'"' | sed 's/-/_/g')
LATEST=0
UPLOAD=0
TAG=0
while getopts ":lut" opt;do
    case $opt in
    l)
        LATEST=1
        ;;
    t)
        TAG=1
        ;;
    u)
        UPLOAD=1
        ;;
    \?)
        echo "Invalid arguemnts"
        printHelp
        exit 1
        ;;
    :)
        echo "Option -${OPTARG} requires an argument." >&2
        printHelp
        exit 1
        ;;
    esac
done

# 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."
  exit 1
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}')."
  exit 1
fi

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

ENVIRONMENT="production"
BUILD_DIR="dist/static/${VERSION}"
CDN="cdn.rancher.io/ui"
URL="/static"
GS_URL="gs://${CDN}"
CACHE="Cache-Control:no-cache,must-revalidate"
GZIP="html,js,css,xml,txt,map,svg,ttf,woff,woff2"

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

echo "Testing..."
runCmd ./node_modules/.bin/ember test
echo "Done Testing."

echo "Building Static..."
RANCHER_ENDPOINT="" BASE_URL="${URL}" BASE_ASSETS="//${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

# Replace the version token in the static file that cattle serves up
sed -i.bak s/VERSION/${VERSION}/g "${BUILD_DIR}/static/index.html"

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}/_latest"
    runCmd gsutil -h "${CACHE}" -m rsync -c -r -d "${GS_URL}/_latest" "${GS_URL}/latest"
    runCmd gsutil rm -a -f -R "${GS_URL}/_latest"
  else
    runCmd gsutil -m cp -z "${GZIP}" -R ${BUILD_DIR} ${GS_URL}
  fi
fi

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

  # Upload new files, with gzip headers (rsync doesn't have this)
  runCmd docker run --rm -v $LATEST_DIR:/latest google/cloud-sdk gsutil -h "${CACHE}" -m cp -z "${GZIP}" -R /latest "${GS_URL}/_latest"

  # Rsync new files into latest dif
  runCmd docker run --rm -v $LATEST_DIR:/latest google/cloud-sdk gsutil -h "${CACHE}" -m rsync -c -r -d "${GS_URL}/_latest" "${GS_URL}/latest"

  # Remove temp dir
  runCmd docker run --rm -v $LATEST_DIR:/latest google/cloud-sdk gsutil rm -a -f -R "${GS_URL}/_latest"
fi