#!/bin/bash

exec_as() {
    local user="$1"
    shift
    if [ "$(whoami)" != "$user" ]; then
        exec sudo -u "$user" "$0" "$@"
    else
        cd
    fi
}

exec_as minecraft "$@" || exit
bin=bin
PATH="${bin}:${PATH}"
EDITOR="${EDITOR:-nvim}"
alias ls='ls --color=auto'
shopt -s expand_aliases

print_error() {
    >&2 printf '\033[31;1mERROR:\033[0m \033[1m%s\033[0m\n' "$*"
}

public_usage() {
    local name
    name="$(basename "$0")"
    cat << EOF
${name}: utilisation
  ${name} start|status|stop|watch|restart|edit <nom serveur>
  ${name} list|active|usage|shell
EOF
}

error_usage() {
    print_error "Utilisation invalide."
    >&2 public_usage
    return 1
}

public_start() {
    if [ -n "$1" ]; then
        exec screen -S "$1" \
            "$1"
    else
        error_usage
    fi
}

public_status() {
    if [ -n "$1" ]; then
        printf '\033[1m%s\033[0m : ' "$1"
        if screen -ls "$1" > /dev/null 2>&1; then
            echo "en cours d'exécution"
        else
            echo "non en cours d'exécution"
        fi
    else
        error_usage
    fi
}

public_stop() {
    if [ -n "$1" ]; then
        exec screen -S "$1" -X stuff '^E^Ustop^M'
    else
        error_usage
    fi
}

public_watch() {
    exec screen -dr "$1"
}

public_active() {
    exec screen -ls
}

public_list() {
    echo "Serveurs disponibles :"
    exec ls "$bin"
}

public_restart() {
    set -e
    stop "$@"
    start "$@"
    set +e
}

public_edit() {
    exec "$EDITOR" "${bin}/${1}"
}

public_shell() {
    exec bash -i
}

verb="$1"
shift

if [ -z "$verb" ]; then
    public_active
elif declare -F | cut -d \  -f 3 | grep '^public_' | sed 's/^public_//' | grep -q "^${verb}$"; then
    "public_${verb}" "$@"
else
    error_usage
fi