#!/bin/bash

set -eu

# Only GNU getopt supports long options. OS X comes bundled with the BSD getopt
# brew install gnu-getopt to get the GNU getopt on OS X
[[ $(uname -s) == "Darwin" ]] && GNU_GETOPT="/usr/local/opt/gnu-getopt/bin/getopt" || GNU_GETOPT="getopt"
readonly GNU_GETOPT

args=$(${GNU_GETOPT} -o "" -l "output:,version:" -n "$0" -- "$@")
eval set -- "${args}"

readonly SOURCE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"

bundle_file=""
version=""

while true; do
    case "$1" in
    --output) bundle_file="$2"; shift 2;;
    --version) version="$2"; shift 2;;
    --) break;;
    *) echo "Unknown option $1"; exit 1;;
    esac
done

if [[ -z "${version}" ]]; then
    echo "--version is required"
    exit 1
fi

readonly TMPDIR=${TMPDIR:-/tmp} # why is this not set on mint?

if ! $(cd "${SOURCE_DIR}" && git diff --exit-code >/dev/null); then
    echo "You have local changes in box, stash or commit them to proceed"
    exit 1
fi

if ! $(cd "${SOURCE_DIR}/../dashboard" && git diff --exit-code >/dev/null); then
    echo "You have local changes in dashboard, stash or commit them to proceed"
    exit 1
fi

if [[ "$(node --version)" != "v8.11.2" ]]; then
    echo "This script requires node 8.11.2"
    exit 1
fi

box_version=$(cd "${SOURCE_DIR}" && git rev-parse "HEAD")
branch=$(git rev-parse --abbrev-ref HEAD)
dashboard_version=$(cd "${SOURCE_DIR}/../dashboard" && git fetch && git rev-parse "${branch}")
bundle_dir=$(mktemp -d -t box 2>/dev/null || mktemp -d box-XXXXXXXXXX --tmpdir=$TMPDIR)
[[ -z "$bundle_file" ]] && bundle_file="${TMPDIR}/box-${box_version:0:10}-${dashboard_version:0:10}-${version}.tar.gz"

chmod "o+rx,g+rx" "${bundle_dir}" # otherwise extracted tarball director won't be readable by others/group
echo "==> Checking out code box version [${box_version}] and dashboard version [${dashboard_version}] into ${bundle_dir}"
(cd "${SOURCE_DIR}" && git archive --format=tar ${box_version} | (cd "${bundle_dir}" && tar xf -))
(cd "${SOURCE_DIR}/../dashboard" && git archive --format=tar ${dashboard_version} | (mkdir -p "${bundle_dir}/dashboard.build" && cd "${bundle_dir}/dashboard.build" && tar xf -))
(cp "${SOURCE_DIR}/../dashboard/LICENSE" "${bundle_dir}")
echo "${version}" > "${bundle_dir}/VERSION"

echo "==> Installing modules for dashboard asset generation"
(cd "${bundle_dir}/dashboard.build" && npm install --production)

echo "==> Building dashboard assets"
(cd "${bundle_dir}/dashboard.build" && ./node_modules/.bin/gulp --revision ${dashboard_version})

echo "==> Move built dashboard assets into destination"
mkdir -p "${bundle_dir}/dashboard"
mv "${bundle_dir}/dashboard.build/dist" "${bundle_dir}/dashboard/"

echo "==> Cleanup dashboard build artifacts"
rm -rf "${bundle_dir}/dashboard.build"

echo "==> Installing toplevel node modules"
(cd "${bundle_dir}" && npm install --production --no-optional)

echo "==> Create final tarball"
(cd "${bundle_dir}" && tar czf "${bundle_file}" .)

echo "==> Cleaning up ${bundle_dir}"
rm -rf "${bundle_dir}"

echo "==> Tarball saved at ${bundle_file}"