#!/bin/sh

ask=0

is_function() {
    type "$1" 2>/dev/null | sed "s/$1//" | grep -qwi function
}

curr_distro() {
    cat /etc/os-release | grep -G "^ID=" | sed 's/ID=//'
}

include() {
    [ -f "$1" ] || return 1
    . $1
    return 0
}

func() {
    if is_function $(echo "super_$2"); then
        [ "${DO_SUDO:-yes}" = "yes" ] || return 0
        ecmd=". $1 && super_$2"
        [ "$(id -u)" = "0" ] && sh -c "$ecmd" || sudo sh -c "$ecmd"
        unset ecmd
    fi
    is_function $2 && $2
}

# only run this *in crate dir*
run_crate() {
    enabled=1
    include ./crate.sh || exit 1
    if [ -n "$describe" ]; then
        echo "desc($(basename $PWD)): $describe"
    fi
    if [ $enabled -ne 1 ]; then
        return
    fi
    cmd=$1
    scripts=${scripts:-"@self @distro"}
    for s in $scripts; do
        echo "exec($(basename $PWD)): $s/$cmd"
        case $s in
        @self)
            func ./crate.sh $cmd
            ;;
        @distro)
            unset -f super_$cmd
            unset -f $cmd
            include ./crate.$(curr_distro).sh
            func ./crate.$(curr_distro).sh $cmd
            unset -f super_$cmd
            unset -f $cmd
            include ./crate.sh
            ;;
        *)
            sh $s
            ;;
        esac
    done
}

echo "# details:"
echo "# user: $USER (${UID:-$(id -u)})"
echo "# groups: $(groups)"
echo "# distro: $(curr_distro)"

cmd=$1
if [ -z "$cmd" ]; then
    echo "usage: $0 <command> [...args]"
    exit 1
else
    shift
fi

for c in ${@:-$(ls crates)}; do
    [ -d crates/*$c ] || exit 1
    cd crates/*$c
    case $cmd in
    a | apply)
        run_crate apply
        ;;
    u | undo)
        run_crate undo
        ;;
    *) exit 1 ;;
    esac
    cd ../..
done