#!/bin/sh

set -e
IFS=$'\n\t'

function print_golang_args() {

    case "$1" in
        1.8|1.8.6)
            INSTALL_GOLANG_VERSION=1.8.6
            GOLANG_DOWNLOAD_SHA256=f558c91c2f6aac7222e0bd83e6dd595b8fac85aaa96e55d15229542eb4aaa1ff
            ;;
        1.9)
            INSTALL_GOLANG_VERSION=1.9.4
            GOLANG_DOWNLOAD_SHA256=15b0937615809f87321a457bb1265f946f9f6e736c563d6c5e0bd2c22e44f779
            ;;
        1.10|1.10.0)
            INSTALL_GOLANG_VERSION=1.10
            GOLANG_DOWNLOAD_SHA256=b5a64335f1490277b585832d1f6c7f8c6c11206cba5cd3f771dcb87b98ad1a33
            ;;
        *) echo "Unknown golang version $1"; exit 1;
    esac

    printf -- "--build-arg INSTALL_GOLANG_VERSION=%s " "$INSTALL_GOLANG_VERSION"
    printf -- "--build-arg GOLANG_DOWNLOAD_SHA256=%s " "$GOLANG_DOWNLOAD_SHA256"
}

# If you add a new minor version here, be sure to check that the
# ChromeDriver supports this: https://sites.google.com/a/chromium.org/chromedriver/downloads
# You may need to bump the version in scripts/install-chrome.
function print_chrome_args() {
    case "$1" in
        60|60.0) CHROME_VERSION=60.0.3112.90-1 ;;
        61|61.0) CHROME_VERSION=61.0.3163.100-1 ;;
        62|62.0) CHROME_VERSION=62.0.3202.89-1 ;;
        63|63.0) CHROME_VERSION=63.0.3239.132-1 ;;
        64|64.0) CHROME_VERSION=64.0.3282.186-1 ;;
        *) echo "Unknown chrome version $1"; exit 1;
    esac
    printf -- "--build-arg CHROME_VERSION=%s " "$CHROME_VERSION"
}

function print_git_args() {
    case "$1" in
        2.7)
            # Code-debt: When the build refers to "git 2.7" its actually "default" git.
            # so don't actually install a git 2.7 as a default copy is already installed
            return
            ;;
        2.8|2.8.4)
            GIT_VERSION=2.8.4
            GIT_DOWNLOAD_SHA256=626e319f8a24fc0866167ea5f6bf3e2f38f69d6cb2e59e150f13709ca3ebf301
            ;;
        2.9|2.9.0)
            GIT_VERSION=2.9.0
            GIT_DOWNLOAD_SHA256=bff7560f5602fcd8e37669e0f65ef08c6edc996e4f324e4ed6bb8a84765e30bd
            ;;
        2.13)
            GIT_VERSION=2.13.6
            GIT_DOWNLOAD_SHA256=cb53e6b388d8d19189933366c1fe5c1ca500e8b227b9e707af39c3d879e41015
            ;;
        2.14)
            GIT_VERSION=2.14.3
            GIT_DOWNLOAD_SHA256=023ffff6d3ba8a1bea779dfecc0ed0bb4ad68ab8601d14435dd8c08416f78d7f
            ;;
        2.16)
            GIT_VERSION=2.16.2
            GIT_DOWNLOAD_SHA256=9acc4339b7a2ab484eea69d705923271682b7058015219cf5a7e6ed8dee5b5fb
            ;;
        *) echo "Unknown git version $1"; exit 1;
    esac

    printf -- "--build-arg GIT_VERSION=%s " "$GIT_VERSION"
    printf -- "--build-arg GIT_DOWNLOAD_SHA256=%s " "$GIT_DOWNLOAD_SHA256"
}

function print_node_args() {
    case "$1" in
        7.x|7.1) NODE_INSTALL_VERSION=7.x ;;
        8.x) NODE_INSTALL_VERSION=8.x ;;
        *) echo "Unknown node version $1"; exit 1;
    esac
    printf -- "--build-arg NODE_INSTALL_VERSION=%s " "$NODE_INSTALL_VERSION"
}

function print_yarn_args() {
    case "$1" in
        1.0) YARN_INSTALL_VERSION=1.0.2-1 ;;
        1.2) YARN_INSTALL_VERSION=1.2.1-1 ;;
        *) echo "Unknown yarn version $1"; exit 1;
    esac
    printf -- "--build-arg YARN_INSTALL_VERSION=%s " "$YARN_INSTALL_VERSION"
}

function print_postgres_args() {
    printf -- "--build-arg POSTGRES_VERSION=%s " "$1"
}

function parse_arguments() {
    read base
    read base_version
    printf -- "-f Dockerfile.custom " "$base"
    printf -- "--build-arg CUSTOM_IMAGE_NAME=%s " "$base"
    printf -- "--build-arg CUSTOM_IMAGE_VERSION=%s " "$base_version"
    while read image; do
        read version
        case "$image" in
            golang) print_golang_args $version ;;
            chrome) print_chrome_args $version ;;
            git) print_git_args $version ;;
            node) print_node_args $version ;;
            yarn) print_yarn_args $version ;;
            postgresql) print_postgres_args $version ;;
            *) exit 1;;
        esac
    done
}

function generate_command() {
    buildimage_name=$1; shift;

    printf -- "docker build "
    echo $buildimage_name | tr '-' '\n' | parse_arguments

    for i in "$@"
    do
        printf -- "%s " "$i"
    done
    printf -- ".\\n"
}

docker_command=$(generate_command $@)
echo "$1: executing $docker_command"
eval $docker_command