#!/bin/sh

XDG_CACHE_HOME="${XDG_CACHE_HOME:-$HOME/.cache}"

true_input_path="$(readlink -f "$1")"

image() {
    file_path="$1"
    mw="$(($2 - 1))"
    mh="$3"
    x="$4"
    y="$5"

    ueberzugpp cmd -s "$UB_SOCKET" -a add -i PREVIEW -x "$x" -y "$y" --max-width "$mw" --max-height "$mh" -f "$file_path"

    exit 1
}

plaintext() {
    if command -v bat >/dev/null 2>&1; then
        bat --color=never --style=numbers --pager=never "$@"
    else
        cat "$@"
    fi
}

generate_cache_path() {
    while IFS=' ' read -r thumbnail _; do
        printf '%s' "$thumbnail"
    done <<EOF
$XDG_CACHE_HOME/lf/thumbnail.$(stat --printf '%n\0%i\0%F\0%s\0%W\0%Y' "$true_input_path" | sha256sum).jpg
EOF
}

case "$(printf '%s' "$true_input_path" | tr '[:upper:]' '[:lower:]')" in
*.tgz | *.tar.gz)
    tar tzf "$1"
    ;;
*.tar.bz2 | *.tbz2)
    tar tjf "$1"
    ;;
*.tar.txz | *.txz)
    xz -l "$1"
    ;;
*.tar)
    tar tf "$1"
    ;;
*.zip | *.jar)
    unzip -l "$1"
    ;;
*.rar)
    unrar l "$1"
    ;;
*.7z)
    7z l "$1"
    ;;
*.iso)
    iso-info --no-header -l "$1"
    ;;
*.wav | *.mp3 | *.flac | *.m4a | *.ogg | *.opus)
    exiftool "$1"
    ;;
*.avi | *.mp4 | *.mkv | *.mov | *.webm | *.m4v)
    shift
    thumbnail="$(generate_cache_path)"
    [ -f "$thumbnail" ] || ffmpegthumbnailer -i "$true_input_path" -o "$thumbnail" -s 0 -q 5
    image "$thumbnail" "$@"
    ;;
*.bmp | *.jpg | *.jpeg | *.png | *.xpm | *.webp | *.gif)
    shift
    image "$true_input_path" "$@"
    ;;
*.svg)
    shift
    thumbnail="$(generate_cache_path)"
    [ -f "$thumbnail" ] || convert "$true_input_path" "$thumbnail"
    image "$thumbnail" "$@"
    ;;
*.[1-8])
    man "$1" | col -b
    ;;
*)
    plaintext "$@"
    ;;
esac