#!/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
            CHROME_DRIVER_VERSION=2.33
            ;;
        61|61.0)
            CHROME_VERSION=61.0.3163.100-1
            CHROME_DRIVER_VERSION=2.34
            ;;
        62|62.0)
            CHROME_VERSION=62.0.3202.89-1
            CHROME_DRIVER_VERSION=2.35
            ;;
        63|63.0)
            CHROME_VERSION=63.0.3239.132-1
            CHROME_DRIVER_VERSION=2.36
            ;;
        64|64.0)
            CHROME_VERSION=64.0.3282.186-1
            CHROME_DRIVER_VERSION=2.36
            ;;
        65|65.0)
            CHROME_VERSION=65.0.3325.181-1
            CHROME_DRIVER_VERSION=2.36
            ;;
        66|66.0)
            CHROME_VERSION=66.0.3359.181-1
            CHROME_DRIVER_VERSION=2.40
            ;;
        67|67.0)
            CHROME_VERSION=67.0.3396.79-1
            CHROME_DRIVER_VERSION=2.40
            ;;
        *) 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=2.14.4
            GIT_DOWNLOAD_SHA256=0556330e267dc968749619cd90ff6a815eda26f0c89faa5cfba56756e852202f
            ;;
        2.16)
            GIT_VERSION=2.16.4
            GIT_DOWNLOAD_SHA256=e8709ebcda3d793cd933ca55004814959bb8e6fa518b5b37f602d9881e489d2e
            ;;
        2.17)
            GIT_VERSION=2.17.1
            GIT_DOWNLOAD_SHA256=ec6452f0c8d5c1f3bcceabd7070b8a8a5eea11d4e2a04955c139b5065fd7d09a
            ;;
        *) 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 print_ansible_args() {
    printf -- "--build-arg ANSIBLE_VERSION=%s " "$1"
}

function print_terraform_args() {
    case "$1" in
       0.11)
            TERRAFORM_VERSION=0.11.7
            TERRAFORM_DOWNLOAD_SHA256=6b8ce67647a59b2a3f70199c304abca0ddec0e49fd060944c26f666298e23418
            ;;
        *) echo "Unknown terraform version $1"; exit 1;
    esac

    printf -- "--build-arg TERRAFORM_VERSION=%s " "$TERRAFORM_VERSION"
    printf -- "--build-arg TERRAFORM_DOWNLOAD_SHA256=%s " "$TERRAFORM_DOWNLOAD_SHA256"
}

function print_graphicsmagick_args() {
    case "$1" in
        1.3.29)
            GRAPHISMAGICK_VERSION=1.3.29
            GRAPHISMAGICK_DOWNLOAD_SHA256=de820cd10597205941a7e9d02c2e679231e92e8e769c204ef09034d2279ad453
            ;;
        *) echo "Unknown graphicsmagick version $1"; exit 1;
    esac

    printf -- "--build-arg GRAPHISMAGICK_VERSION=%s " "$GRAPHISMAGICK_VERSION"
    printf -- "--build-arg GRAPHISMAGICK_DOWNLOAD_SHA256=%s " "$GRAPHISMAGICK_DOWNLOAD_SHA256"
}

function parse_arguments() {
    read base
    read base_version

    # Lock Ruby to Debian stretch
    case "$base" in
        ruby) base_version="$base_version-stretch" ;;
    esac

    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 ;;
            ansible) print_ansible_args $version ;;
            terraform) print_terraform_args $version ;;
            graphicsmagick) print_graphicsmagick_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