#!/bin/zsh

apply_overrides() {
    name="$1"
    kind="$2"
    echo $3 |
        sed -E 's/; */\n/g' |
        while IFS=$'\n ' read -r override_key override_values; do
            [[ -z $override_values ]] && continue
            override_key=$(echo $override_key | sed 's/[: ]//g')
            [[ $override_key = $BOX_SETUP_OS ]] && eval $override_values
            [[ $override_key = $BOX_SETUP_DISTRO ]] && eval $override_values
            [[ $4 =~ $override_key ]] && eval $override_values
        done
    [[ -z $name || -z $kind ]] && echo "zz_skip,zz_skip" || echo "$name,$kind"
}

build_custom() {
    target=$(echo "custom_$BOX_SETUP_OS-$BOX_SETUP_DISTRO-$1" | tr '-' '_')
    [[ ! -e ./installs_and_builds/$target ]] &&
        target=$(echo "custom_default_$1" | tr '-' '_')
    [[ ! -e ./installs_and_builds/$target ]] &&
        echo "custom build/install script not found for: $1" &&
        return

    tmpdir=$(mktemp -d "${TMPDIR:-/tmp}/$1.XXXXXXXX") || {
        echo "could not create temp dir for $1 build" && return
    }

    custom_script_path=$(pwd)/installs_and_builds/$target
    pushd $tmpdir > /dev/null
    $custom_script_path
    popd > /dev/null
}

echo "---- updating package manager / packages"
[[ -n "$BOX_SETUP_UPDATE_PKG_MANAGER_AND_DEFS_CMD" ]] &&
    ${=BOX_SETUP_UPDATE_PKG_MANAGER_AND_DEFS_CMD}
[[ -n "$BOX_SETUP_UPDATE_PKGS_CMD" ]] && ${=BOX_SETUP_UPDATE_PKGS_CMD}

echo "---- installing programs ---------------"
[[ -z $1 ]] && system_types_list="base" || system_types_list="base,$1"
echo "-------- for system types: $system_types_list"

sed 1d "installs_and_builds/programs.csv" |
    while IFS=, read -r name kind os_overrides distro_overrides system_overrides notes; do
        apply_overrides $name $kind $os_overrides '' | IFS=, read -r name kind
        apply_overrides $name $kind $distro_overrides '' | IFS=, read -r name kind
        apply_overrides $name $kind $system_overrides $system_types_list |
            IFS=, read -r name kind

        [[ $name = 'zz_skip' || $kind = 'zz_skip' ]] && continue

        echo "-- installing $name"
        [[ $kind = 'package_manager' ]] && ${=BOX_SETUP_INSTALL_COMMAND} ${=name}
        [[ $kind = 'build_custom' ]] && build_custom $name
    done