#!/bin/bash

set -x
set -e

CUR_DIR=$(dirname $(readlink -e -v ${BASH_SOURCE[0]}))
SRC_DIR=$(dirname $CUR_DIR)

usage() {
    cat >&2 <<-EOF
Usage:
    $0 build_template_file
Example:
    $0 $SRC_DIR/examples/ack-aliyunlinux2.json
EOF
}

check_params() {
    BUILD_TEMPLATE_FILE="$1"

    if [[ -z $BUILD_TEMPLATE_FILE ]]; then
        echo "ERROR: must be specify one template file"
        usage
        return 1
    fi

    if ! [[ -f $BUILD_TEMPLATE_FILE ]]; then
        echo "ERROR: cannot find file: $BUILD_TEMPLATE_FILE"
        return 1
    fi
}

check_env() {
    if [[ -z $ALICLOUD_REGION || -z $ALICLOUD_ACCESS_KEY || -z $ALICLOUD_SECRET_KEY ]]; then
        echo "ERROR: ALICLOUD_REGION/ALICLOUD_ACCESS_KEY/ALICLOUD_SECRET_KEY must be not empty"
        return 1
    fi

    if [[ -z "$RUNTIME" ]]; then
        echo "WARN: RUNTIME is empty, will set it 'docker' by default"
        RUNTIME="docker"
    fi
}

check_docker_image() {
    if docker inspect registry.aliyuncs.com/acs/ack-image-builder:v1.0.0 &>/dev/null; then
        :
    else
        make
    fi
}

build_os_image() {
    docker run -e ALICLOUD_REGION=$ALICLOUD_REGION \
               -e ALICLOUD_ACCESS_KEY=$ALICLOUD_ACCESS_KEY \
               -e ALICLOUD_SECRET_KEY=$ALICLOUD_SECRET_KEY \
               -e RUNTIME=$RUNTIME \
               -v $BUILD_TEMPLATE_FILE:/scripts/$(basename $BUILD_TEMPLATE_FILE) \
               registry.aliyuncs.com/acs/ack-image-builder:v1.0.0 /scripts/$(basename $BUILD_TEMPLATE_FILE)
}

main() {
    check_params "$@"
    check_env
    check_docker_image
    build_os_image
}

main "$@"