#!/usr/bin/env bash
#
#               __
#              /\ \__
#   __    _____\ \ ,_\ _____     __      ___
# /'__`\ /\ '__`\ \ \//\ '__`\ /'__`\   /'___\
#/\ \L\.\\ \ \L\ \ \ \\ \ \L\ /\ \L\.\_/\ \__/
#\ \__/.\_\ \ ,__/\ \__\ \ ,__\ \__/.\_\ \____\
# \/__/\/_/\ \ \/  \/__/\ \ \/ \/__/\/_/\/____/
#           \ \_\        \ \_\
#            \/_/         \/_/
# a pacman wrapper with syntax based on debian's apt
# (c) 2019-2020 Fascode Network.
# maintained by Yamada Hayao

set -e

OPTIONS=
AURHELP=
HELPERS=(
    "yay"
    "yaourt"
    "aurman"
)

pacman="pacman"


if [[ ! "${UID}" = 0 ]]; then
    if [[ -z ${AURHELP} ]]; then
        for AURHELP in ${HELPERS[@]}; do
            if [[ -f $(which ${AURHELP} 2> /dev/null) ]]; then
                pacman=$(which ${AURHELP})
                break
            fi
        done
    else
        if [[ -f $(which ${AURHELP} 2> /dev/null) ]]; then
            pacman=${AURHELP}
        else
            echo "${AURHELP} is not installed." >&2
            exit 1
        fi
    fi
fi


if [[ ! "${UID}" = 0 ]]; then
    pacman="sudo pacman"
fi


# List option
installed=false

_usage () {
    echo "usage ${0} [options] [command] [packages]"
    echo " commands:              "
    echo "    install                       Install the specified package."
    echo "    remove                        Remove the specified package."
    echo "    purge                         Permanently remove the package."
    echo "    update                        Update the package database."
    echo "    upgrade                       Update the package."
    echo "    search                        Search for a package."
    echo "    autoremove                    Remove unnecessary packages."
    echo "    clean                         Remove the package cache."
    echo "    list                          Displays a list of packages."
    echo
    echo " general options:       "
    echo "    -y | --yes  | --assume-yes    Do not check."
    echo "    -d | --download-only          Only download the package."
    echo "    -c <file>                     Config file for pacman."
    echo "    -h | --help                   Display this help."
    echo "    -v                            Displays the version of pacman."
    echo "    --purge                       Delete the entire configuration file."
}

_exit () {
    exit ${1}
}

_msg_error () {
    echo -e "${@}" >&2
}

ADD_OPTION () {
    OPTIONS="${OPTIONS} ${@}"
}

while getopts 'ydf-:c:hv' arg; do
    case "${arg}" in
        y) ADD_OPTION "--noconfirm" ;;
        d) ADD_OPTION "-w" ;;
        f) : ;;
        c) ADD_OPTION "--config ${OPTARG}" ;;
        h) _usage; _exit 0 ;;
        v) _version; _exit 0 ;;
        -)
            case "${OPTARG}" in
                download-only) ADD_OPTION "-w" ;;
                fix-broken) :;;
                yes) ADD_OPTION "--noconfirm" ;;
                assume-yes) ADD_OPTION "--noconfirm" ;;
                installed) installed=true;;
                purge) ADD_OPTION "-n" ;;
                help) _usage; _exit 0 ;;
            esac
    esac
done

shift $((OPTIND - 1))

if [[ $# -lt 1 ]]; then
    _msg_error "No command specified"
    _usage
    _exit 1
fi
COMMAND="${1}"

shift 1

PACKAGE="${@}"

case "${COMMAND}" in
    install) ADD_OPTION "-S" ;;
    remove) ADD_OPTION "-Rsc" ;;
    purge) ADD_OPTION "-Rsnc" ;;
    update) ADD_OPTION "-Syy" ;;
    upgrade) ADD_OPTION "-Syu" ;;
    search) ADD_OPTION "-Ss" ;;
    full-upgrade) ADD_OPTION "-Syu" ;;
    edit-sources) sudo nano /etc/pacman.conf; _exit 0 ;;
    dist-upgrade) ADD_OPTION "-Syu" ;;
    huawei) 
        if [[ "${LANG}" = "ja_JP.UTF-8" ]]; then
            echo "(ง •ᴗ•)ว ⁾⁾ﾌｧｰｳｪｲでｳｪｲｳｪｲ"
        fi
        exit 0
        ;;
    moo)
cat << EOF
         (__) 
         (oo) 
   /------\/ 
  / |    ||   
 *  /\---/\ 
    ~~   ~~   
...."Have you mooed today?"...
EOF
    exit 0
    ;;
    clean)
        ADD_OPTION "-Sccc"
        ;;
    autoremove) if [[ -n $(${pacman} -Qttdq) ]]; then
                    pacman -Qttdq | pacman -Rsnc -
                else
                    echo "No packages to remove."
                fi
                exit 0
                ;;
    list)
        if ${installed}; then
            ADD_OPTION "-Q | grep"
        else
            ADD_OPTION "-Ss"
        fi
        ;;
    *)
        _msg_error "Invalid comman '${COMMAND}'"
        _exit 1
        ;;
esac

if [[ ! "${pacman}" = "pacman" ]]; then
    echo "Use AUR helper ${pacman}."
fi

# echo "${pacman} ${OPTIONS} ${PACKAGE}"
${pacman} ${OPTIONS} ${PACKAGE}