#!/bin/bash

echo -e "\n==> EXECUTING @$(date -u +'%Y-%m-%d_%H-%M-%S'): ${0} $@\n"

declare _mydir=$(dirname $0)
source "${_mydir}"/env.rc
source "${_mydir}"/util.rc

main() {
    local params=$@
    local now
    local version_sticker
    local cache_script="cache"
    local -i exit_code=0
    local target_stage

    if [[ -f "${_build_context}/${_scrap_demand_stop_building}" ]] ; then
    
        echo "Skipping build on demand."
        return 0
    fi

    ### refresh local cache for the case the 'pre_build' was not run
    "${_mydir}/${cache_script}" "${_branch}" "${_blend}"
    exit_code=$?
    if [[ ${exit_code} -ne 0 ]] ; then die "Script '${cache_script}' failed with code ${exit_code}." ${exit_code} ; fi

    ### get current version sticker
    if [[ -f "${_build_context}/${_scrap_version_sticker_current}" ]] ; then

        version_sticker="$( cat ${_build_context}/${_scrap_version_sticker_current} )"
    else
        version_sticker="null"
    fi

    ### check for the '--target' parameter
    if [[ $# -gt 0 ]] ; then

        ### no quotes around 'params'
        for i in ${params} ; do
            if [[ "${i}" == "--target" ]] ; then

                target_stage="${i}"

            elif [[ -n "${target_stage}" ]] ; then

                ### only if '--target' is followed by a value
                if [[ ! "${i}" =~ ^- ]] ; then
                    target_stage="${i}"
                fi
                break
            fi
        done

        ### remove the orphaned '--target' (missing value)
        if [[ "${target_stage}" == "--target" ]] ; then
            params="${params/--target/}"
            target_stage=""
        fi
    fi

    now="$(date --utc +%FT%TZ)"
    echo "Current timestamp: ${now}" ; echo

    set -x
    ### no quotes around 'params'
    docker build ${params} \
        -f "${DOCKERFILE_PATH}" \
            --build-arg BASEIMAGE="${BASEIMAGE}" \
            --build-arg BASETAG="${BASETAG}" \
            --build-arg ARG_CREATED="${now}" \
            --build-arg ARG_DOCKER_TAG=${DOCKER_TAG} \
            --build-arg ARG_VERSION_STICKER="${version_sticker}" \
            --build-arg ARG_VCS_REF="$(git rev-parse --short HEAD)" \
            \
            ${FEATURES_BUILD_SLIM:+--build-arg ARG_APT_NO_RECOMMENDS=1} \
            ${FEATURES_SCREENSHOOTING:+--build-arg ARG_FEATURES_SCREENSHOOTING=1} \
            ${FEATURES_THUMBNAILING:+--build-arg ARG_FEATURES_THUMBNAILING=1} \
            \
            ${FEATURES_VNC:+--build-arg ARG_TIGERVNC_DISTRO=${TIGERVNC_DISTRO}} \
            ${FEATURES_VNC:+--build-arg ARG_TIGERVNC_VERSION=${TIGERVNC_VERSION}} \
            \
            ${FEATURES_NOVNC:+--build-arg ARG_NOVNC_VERSION=${NOVNC_VERSION}} \
            ${FEATURES_NOVNC:+--build-arg ARG_WEBSOCKIFY_VERSION=${WEBSOCKIFY_VERSION}} \
            ${FEATURES_NOVNC:+--build-arg ARG_MERGE_STAGE_VNC_BASE="stage_novnc"} \
            \
            ${FEATURES_CHROMIUM:+--build-arg ARG_MERGE_STAGE_BROWSER_BASE="stage_chromium"} \
            \
            ${FEATURES_FIREFOX:+--build-arg ARG_MERGE_STAGE_BROWSER_BASE="stage_firefox"} \
            ${FEATURES_FIREFOX_PLUS:+--build-arg ARG_MERGE_STAGE_BROWSER_BASE="stage_firefox_plus"} \
            \
        -t "${DOCKER_REPO}:${DOCKER_TAG}${target_stage:+_${target_stage}}" "${_build_context}"
    set +x
}

main $@

echo -e "\n==> FINISHED  @$(date -u +'%Y-%m-%d_%H-%M-%S'): ${0} $@\n"