#!/bin/sh

[ -d "$HOME/.cache/vifm" ] || mkdir -p "$HOME/.cache/vifm"

# $1 action
action="$1"
# $2 panel width
panel_width=$(($2 * 6))
# $3 panel height
panel_height=$(($3 * 14))
# $4 image path
image_file="$4"

PCACHE="$HOME/.cache/vifm/thumbnail.$(stat --printf '%n\0%i\0%F\0%s\0%W\0%Y' -- "$(readlink -f "$PWD/$image_file")" | sha256sum | awk '{print $1}')"

cleanup() {
    printf '\33[s\33[5A\33[2K\33[u'
    clear
    exit 0
}

# recieves image with height
image() {
    montage "$1" -geometry "${2}x${3}" sixel:-
}

case "$action" in
"clear")
    cleanup
    ;;
"draw")
    [ ! -f "${PCACHE}.jpg" ] && convert "$image_file"'[0]' "${PCACHE}.jpg"
    # FILE="$PWD/$image_file"
    image "${PCACHE}.jpg" "$panel_width" "$panel_height"
    ;;
"video")
    [ ! -f "${PCACHE}.jpg" ] &&
        ffmpegthumbnailer -i "$4" -o "${PCACHE}.jpg" -s 0 -q 5
    image "${PCACHE}.jpg" "$panel_width" "$panel_height"
    ;;
"epub")
    [ ! -f "${PCACHE}.jpg" ] &&
        epub-thumbnailer "$image_file" "$PCACHE" 1024
    image "${PCACHE}.jpg" "$panel_width" "$panel_height"
    ;;
"pdf")
    [ ! -f "${PCACHE}.jpg" ] &&
        pdftoppm -jpeg -f 1 -singlefile "$image_file" "$PCACHE"
    image "${PCACHE}.jpg" "$panel_width" "$panel_height"
    ;;
"audio")
    [ ! -f "${PCACHE}.jpg" ] &&
        ffmpeg -i "$image_file" "${PCACHE}.jpg" -y >/dev/null
    image "${PCACHE}.jpg" "$panel_width" "$panel_height"
    ;;
"font")
    [ ! -f "${PCACHE}.jpg" ] &&
        fontpreview -i "$image_file" -o "${PCACHE}.jpg"
    image "${PCACHE}.jpg" "$panel_width" "$panel_height"
    ;;
*) ;;
esac