#!/usr/bin/env bash

version() {
    echo "0.1.0"
}

help() {
    local cmds="$(commands)"

    echo "     _                       ";
    echo "    (_)_ __ ___   __ _  __ _ ";
    echo "    | | '_ \` _ \ / _\` |/ _\` |";
    echo "    | | | | | | | (_| | (_| |";
    echo "    |_|_| |_| |_|\__,_|\__, |";
    echo "                       |___/ ";
    echo "    -------------------------";
    cat <<EOS

    Usage: imag [--version | --versions | -h | --help] <command> <args...>

    imag - the personal information management suite for the commandline

    imag is a PIM suite for the commandline. It consists of several commands,
    called "modules". Each module implements one PIM aspect and all of these
    modules can be used independently.

    Available commands:
    $(for cmd in $cmds; do
        echo -e "\t$(echo $cmd | sed -r 's,(.*)/imag-(.*),\2,')";
    done)

    Call a command with "imag <command> <args>"
    Each command can be called with "--help" to get the respective helptext.

    Please visit https://github.com/matthiasbeyer/imag to view the source code,
    follow the development of imag or maybe even contribute to imag.

    imag is free software. It is released under the terms of LGPLv2.1

    (c) 2016 Matthias Beyer and contributors
EOS
}

commands() {
    [[ ! -z "$IMAG_IS_THE_SHIT" ]] && \
        find $IMAG_IS_THE_SHIT -type f -iname "imag-*" -print 2>/dev/null
    find ${PATH//:/ } -maxdepth 1 -type f -iname "imag-*" -print 2>/dev/null
}

main() {
    case $1 in
        --versions)
            echo -n "imag "; version
            for command in $(commands); do
                $command --version
            done
            exit 0
            ;;

        --version)
            version
            exit 0
            ;;

        --help | -h)
            help
            exit 0
            ;;

        *)
            local cmd=$1; shift
            local executable=$(commands | grep $cmd | head -n 1)
            exec $executable $*
        ;;

    esac
}

main $*