#!/bin/bash -ex

function print_usage() {
    set +ex
    echo "$0" "[options]"
    if [[ -n "$1" ]]; then
        echo "Option $1 not found"
    fi
    echo "Options -----------------------------"
    echo "-h/--help        Displays this help message"
    echo "-f/--dockerfile  Specify the Dockerfile to use for building the CNI container"
    echo "-b/--bin-dir     Specify the path where to place the CNI executable"
    echo "-c/--conf-dir    Specify the path where to place the CNI configuration"
    echo "-t/--tag         Specify string to use as the tag part of the container image name, i.e., kuryr/cni:tag"
    echo "-D/--no-daemon   Do not run CNI as a daemon"
    echo "-p/--podman      Use podman instead of docker to build image"
}

for arg in "$@"; do
    shift
    case "$arg" in
        "--help")        set -- "$@" "-h" ;;
        "--bin-dir")     set -- "$@" "-b" ;;
        "--conf-dir")    set -- "$@" "-c" ;;
        "--dockerfile")  set -- "$@" "-f" ;;
        "--tag")         set -- "$@" "-t" ;;
        "--no-daemon")   set -- "$@" "-D" ;;
        "--podman")      set -- "$@" "-p" ;;
        "--"*)           print_usage "$arg" >&2; exit 1 ;;
        *)               set -- "$@" "$arg"
    esac
done

#Default value
dockerfile="cni.Dockerfile"
image_name="kuryr/cni"
daemonized="True"
build_args=()
build_cmd="docker build"

OPTIND=1

while getopts "hf:b:c:t:D:p" opt; do
    case "$opt" in
        "h") print_usage; exit 0 ;;
        "D") daemonized=False ;;
        "f") dockerfile=${OPTARG} ;;
        "b") build_args+=('--build-arg' "CNI_BIN_DIR_PATH=${OPTARG}") ;;
        "c") build_args+=('--build-arg' "CNI_CONFIG_DIR_PATH=${OPTARG}") ;;
        # Until https://github.com/containers/buildah/issues/1206 is resolved
        # we need to use buildah directly.
        "p") build_cmd="sudo buildah bud" && image_name="docker.io/kuryr/cni" ;;
        "t") image_name=${image_name}:${OPTARG} ;;
        "?") print_usage >&2; exit 1 ;;
    esac
done

shift $((OPTIND - 1))

# create cni daemonset image
${build_cmd} -t "$image_name" \
    --build-arg "CNI_DAEMON=$daemonized" \
    "${build_args[@]}" \
    -f "$dockerfile" .