#!/usr/bin/env bash

# fzf_preview_mine

file="$1"
mime=$(file --mime-type -b "$file" 2>/dev/null)
debug="0"

tmp=$(mktemp -d)
cleanup() {
    pkill -P $$
    sleep 0.1
    rm -rf "$tmp"
}
trap cleanup EXIT

if [[ $mime == image/* ]]; then
    width_px="$((FZF_PREVIEW_COLUMNS))"
    height_px="$((FZF_PREVIEW_LINES))"
    chafa -f sixels -s "${width_px}x${height_px}" "$file" 2>/dev/null

elif [[ $mime == audio/* ]] || [[ "${file,,}" == *.m4a ]] || [[ "${file,,}" == *.mp3 ]]; then
    mediainfo "$file" 2> /dev/null
    mpv --no-video --quiet "$file" 2> /dev/null

elif [[ $mime == video/* ]]; then
    (( debug )) && echo "video"
    dur=$(ffprobe -v panic -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$file")
    [[ -z "$dur" || "$dur" == "N/A" ]] && dur=50
    halfdur=$(bc -l <<< "$dur / 2.00")

    ffmpeg -hide_banner -loglevel panic -ss "$halfdur" -i "$file" -frames:v 1 "$tmp/middle.png" -y
    width_px="$((FZF_PREVIEW_COLUMNS))"
    height_px="$((FZF_PREVIEW_LINES))"
    chafa -f sixels -s "${width_px}"x"${height_px}" "$tmp/middle.png" 2>/dev/null

elif [[ $mime == binary/* ]]; then
    echo "[BINARY: $(basename "$file")]"

elif [[ "$file" == *.epub ]]; then
    {
        epub2txt -a -n "$file" 2>/dev/null ||
        pandoc "$file" -t plain 2>/dev/null
    } | fold -s -w "$FZF_PREVIEW_COLUMNS"

elif [[ "$mime" == application/pdf ]]; then
    pdftotext -f 1 -l 2 -layout "$file" - 2>/dev/null \
    | fold -s -w "$FZF_PREVIEW_COLUMNS"

else
    fold -s -w "$FZF_PREVIEW_COLUMNS" "$file"

fi