# Requires context:
#     - BASEIMAGE_PATH: absolute path of baseimage repo
#     - BASEIMAGE_REPO: basename of baseimage repo

BASEIMAGE_NAME="${BASEIMAGE_NAME:-eu.gcr.io/avatao-challengestore/tutorial-framework}"

libhack_dir="$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")"
source "${libhack_dir}/common.sh"


baseimage::build_as_latest() {
    pushd "${BASEIMAGE_PATH}"
    baseimage::build
    baseimage::tag_as_latest
    popd
}

baseimage::build() {
    pushd "${BASEIMAGE_PATH}"
    docker build -t "${BASEIMAGE_NAME}:$(releasename)" \
                 .
    popd
}

baseimage::build_if_exists() {
    if [[ -d "$BASEIMAGE_PATH" ]]; then
        baseimage::build_as_latest
    fi
}

baseimage::tag_as_latest() {
    docker tag "${BASEIMAGE_NAME}:$(releasename)" "${BASEIMAGE_NAME}:latest"
}

baseimage::release() {
    pushd "${BASEIMAGE_PATH}"
    check_drone_releasename

    local tag
    tag="$(releasename)"
    read -p "Tag and push new TFW version \"${tag}\"? [y/N]" -r && echo
    if [[ $REPLY =~ ^(y|Y|yes|Yes|YES)$ ]]; then
        prompt_for_tag_description # This command sets $description
        tag="${tag}" description="${description}" force_push_tag
    fi
    popd
}

baseimage::builddocs() {
    mount_point="/mnt/docs"

    docker run --rm                                         \
               -ti                                          \
               -v "${BASEIMAGE_PATH}"/docs:"${mount_point}" \
               "${BASEIMAGE_NAME}"                          \
               /bin/bash -c                                 \
                    "cd ${mount_point}
                    pip3 install sphinx
                    make html
                    exit"                                   \
               &> /dev/null

    if [ "$?" == "0" ]; then
        echo "Built baseimage docs at ${BASEIMAGE_PATH}/docs/build/html!"
    else
        echo "Building baseimage docs failed!"
    fi
}

releasename() {
    local version
    local date
    version="$(cat VERSION | head -n 1)"
    date="$(date +%Y%m%d)"
    printf "${version}-${date}"
}

check_drone_releasename() {
    local drone_releasename
    local actual_releasename
    drone_releasename="$(grep -oP '(?<=branch:\srefs/tags/).+(?=-.+)' .drone.yml)"
    actual_releasename="$(releasename | grep -oP ".+(?=-\d{8})")"
    if [ "${drone_releasename}" != "${actual_releasename}" ]; then
        echo "Release name '${drone_releasename}' in .drone.yml does not match \
              actual release name '${actual_releasename}' in VERSION."
        echo "Please make them match before releasing!"
        exit 1
    fi
}

prompt_for_tag_description() {
    local editor
    local tempfile
    editor="$(git config --global core.editor)"
    tempfile="$(mktemp)"

    printf "\n\n" >> "${tempfile}"
    echo "# Please enter the description for this release." >> "${tempfile}"
    echo "# Lines starting with '#' will be ignored." >> "${tempfile}"
    echo "# An empty description aborts the release." >> "${tempfile}"

    ${editor} "${tempfile}"
    sed -i -e 's/#.*$//' -e '/^$/d' "${tempfile}"
    sed -i 's/\n/ /g' "${tempfile}"
    if [[ ! -s "${tempfile}" ]]; then
        echo "Aborting release due to empty description."
        exit 1
    fi

    description="$(tr '\n' ' ' < "${tempfile}")"
    rm "${tempfile}"
}

force_push_tag() {
    git tag -d "${tag}" > /dev/null 2>&1 || :
    git push --delete origin "${tag}" > /dev/null 2>&1 || :
    git tag -s -m "${description}" "${tag}"
    git push origin "${tag}"
}