#!/bin/sh
KOMETA_XDG_TESTING="${KOMETA_XDG_TESTING:-0}"
KOMETA_XDG_TYPE="${KOMETA_XDG_TYPE:-}"
KOMETA_XDG_DIR=/etc/xdg/kometa
XDG_CONFIG_DIRS="${XDG_CONFIG_DIRS:-}"

_check_runability(){
    case "$1" in
        systemd ) : ;;
        profile ) : ;;
        * )
            echo 'Set $KOMETA_XDG_TYPE to systemd or profile!' >&2
            return 1
        ;;
    esac
}

# XXX Who is that crazy person who sets adds ~/.config/kdedefaults to
# XDG_CONFIG_DIRS=/home/user/.config/kdedefaults:/etc/kf5/xdg:/etc/xdg
# and why does he do such a strange thing?!
# Example of what we have to do:
# convert XDG_CONFIG_DIRS=/home/user/.config/kdedefaults:/etc/kf5/xdg:/etc/xdg
# into XDG_CONFIG_DIRS=/home/user/.config/kdedefaults:/etc/xdg/kometa:/etc/kf5/xdg:/etc/xdg
# I do not want to write very complex code to deal with all possible cases.
# Let's assume that current value:
# * is not a mess and is a valid value
# * does not have repeated directories (if it has, we will probably still be OK)
# $1: current value of $XDG_CONFIG_DIRS
_mk_xdg_config_dirs(){
    local tmp
    tmp="$1"
    case "$tmp" in
        "" )
            # https://bugzilla.altlinux.org/show_bug.cgi?id=41566
            tmp=/etc/kf5/xdg:/etc/xdg
        ;;
        :/etc/xdg )
            # not a valid value!
            tmp=/etc/xdg
        ;;
        /etc/xdg )
            :
        ;;
        */etc/xdg )
            :
        ;;
        * )
            # not a valid values - does not end with /etc/xdg
            tmp="$tmp:/etc/xdg"
        ;;
    esac
    case "$tmp" in
        *:/etc/xdg/kometa:* | /etc/xdg/kometa:* )
            :
        ;;
        *:/etc/kf5/xdg:* )
            tmp="$(echo "$tmp" | sed -e "s,:/etc/kf5/xdg:,:$KOMETA_XDG_DIR:/etc/kf5/xdg:,")"
        ;;
        /etc/kf5/xdg:* )
            tmp="$(echo "$tmp" | sed -e "s,^/etc/kf5/xdg:,$KOMETA_XDG_DIR:/etc/kf5/xdg:,")"
        ;;
        *:/etc/xdg )
            tmp="$(echo "$tmp" | sed -e "s,:/etc/xdg,:$KOMETA_XDG_DIR:/etc/xdg,")"
        ;;
        /etc/xdg )
            tmp="$(echo "$tmp" | sed -e "s,^/etc/xdg,$KOMETA_XDG_DIR:/etc/xdg,")"
        ;;
    esac
    echo "$tmp"
}

_main(){
    _check_runability "$1"
    # $XDG_DATA_DIRS may be added
    local result_xdg_config_dirs
    result_xdg_config_dirs="$(_mk_xdg_config_dirs "$XDG_CONFIG_DIRS")"
    case "$1" in
        systemd )
            echo XDG_CONFIG_DIRS="$result_xdg_config_dirs"
        ;;
        profile )
            export XDG_CONFIG_DIRS="$result_xdg_config_dirs"
        ;;
    esac
}

if [ "$KOMETA_XDG_TESTING" = 0 ]; then
    _main "$KOMETA_XDG_TYPE"
fi