#!/bin/sh

www() {
    exec firefox "$1"
}

img() {
    exec feh "$1"
}

music() {
    exec mpv "$1"
}

video() {
    exec mpv "$1"
}

pdf() {
    exec firefox "$1"
}

term() {
    exec st -e /bin/sh -c "$1 ; exec \"${SHELL}\""
}

# https://unix.stackexchange.com/a/4991
exists_in_path() {
    command -v "$1" > /dev/null
}

resolve_plumb_path() {
    case "$1" in
        /*)
            echo "$1"
            return 0
            ;;
        *)
            target_shell="bash"

            parent_process_children=$(xprop -id $(xprop -root 32x '\t$0' _NET_ACTIVE_WINDOW | cut -f 2) _NET_WM_PID | cut -d' ' -f3 | xargs pstree -lpA)
            temp="${parent_process_children##*${target_shell}(}"
            shell_pid="${temp%%)--*}"
            shell_pid="${shell_pid%?}"
            shell_cwd="$(readlink /proc/${shell_pid}/cwd)"
            final_path="${shell_cwd}/$1"
            if [ -e "${final_path}" ]; then
                echo "${final_path}"
                return 0
            else
                echo ""
                return 1
            fi
            ;;
    esac
}

do_plumb() {
    case "$1" in
        https://*) www "$1" ;;
        http://*) www "$1" ;;
        *.tif|*.TIF|*.jpg|*.JPG|*.jpeg|*.JPE?|*.gif|*.GIF|*.tiff?|*.TIFF?|*.ppm|*.PPM|*.bit|*.BIT|*.png|*.PNG|*.pgm|*.PGM|*.bmp|*.BMP|*.yuv|*.YUV|*.tga|*.TGA|*.webp|*.WEBP)
            img "$(resolve_plumb_path ${1})"
            ;;
        *.mp3|*.MP3|*.ogg|*.OGG|*.flac|*.FLAC|*.wav|*.WAV|*.au|*.AU|*.mid|*.MID|*.mus|*.MUS|*.m3u|*.M3U|*.pls|*.PLS|*.plist|*.PLIST|*.opus|*.OPUS)
            music "$(resolve_plumb_path ${1})"
            ;;
        *.mp4|*.MP4|*.avi|*.AVI|*.webm|*.WEBM)
            video "$(resolve_plumb_path ${1})"
            ;;
        *.pdf|*.PDF)
            pdf "$(resolve_plumb_path ${1})"
            ;;
        *)
            target="${1}"
            first=${target%% *}
            case "${first}" in
                \) | \( | \} | \] | \{ | \[)
                    term "${target}"
                    ;;
                *)
                    if exists_in_path "${first}"; then
                        term "${target}"
                    else
                        exit 1
                    fi
                    ;;
            esac
            ;;
    esac
}

target="$1"

if [ $# -eq 0 ]; then
    # no arguments supplied, use the x clipboard
    target="$(xclip -o -)"
fi

do_plumb "${target}"