#!/bin/sh

YTDL_CMD_BASE="yt-dlp --continue --embed-metadata --ignore-errors --no-force-overwrites --no-playlist --verbose"

# Process command-line options for download type
while getopts "mvr" opt; do
  case $opt in
  m)
    DOWNLOAD_TYPE="music"
    OUTPUT_DIR="${XDG_MUSIC_DIR:-${HOME}/Music}"
    ARCHIVE_FILE="${XDG_DOTFILES_DIR:-${HOME}/.dotfiles}/default/Music/.music.txt"
    YTDL_OUTPUT_FORMAT="${OUTPUT_DIR}/%(artist|)s%(artist& - |)s%(title)s.%(ext)s"
    YTDL_CMD_BASE="$YTDL_CMD_BASE --audio-format best --audio-quality 0 --download-archive \"$ARCHIVE_FILE\" --extract-audio --recode-video mp3"
    ;;
  v)
    DOWNLOAD_TYPE="video"
    OUTPUT_DIR="${XDG_VIDEOS_DIR:-${HOME}/Videos}"
    YTDL_OUTPUT_FORMAT="${OUTPUT_DIR}/%(title)s [%(id)s].%(ext)s"
    VIDEO_EXT=$(printf "best\n60fps\n30fps\nmp4\nmkv" | dmenu -i -p "Choose an encoding (default: 1080p)") || exit
    case $VIDEO_EXT in
    best)
      VIDEO_FORMATS="--format bestvideo+bestaudio/best"
      VIDEO_OPTIONS=""
      ;;
    60fps)
      VIDEO_FORMATS='--format "((bv*[fps=60]/bv*)[height<=1080]/(wv*[fps=60]/wv*)) + ba / (b[fps=60]/b)[height<=1080]/(w[fps=60]/w)"'
      VIDEO_OPTIONS=""
      ;;
    30fps)
      VIDEO_FORMATS='--format "((bv*[fps=30]/bv*)[height<=1080]/(wv*[fps=30]/wv*)) + ba / (b[fps=30]/b)[height<=1080]/(w[fps=30]/w)"'
      VIDEO_OPTIONS=""
      ;;
    *)
      VIDEO_FORMATS="--format bestvideo+bestaudio/best"
      VIDEO_OPTIONS="--recode-video $VIDEO_EXT"
      ;;
    esac
    YTDL_CMD_BASE="$YTDL_CMD_BASE --buffer-size 1M --embed-thumbnail $VIDEO_FORMATS --no-sponsorblock $VIDEO_OPTIONS"
    ;;
  r)
    OUTPUT_DIR="${XDG_MUSIC_DIR:-${HOME}/Music}"
    ARCHIVE_FILE="${XDG_DOTFILES_DIR:-${HOME}/.dotfiles}/default/Music/.music.txt"
    YTDL_OUTPUT_FORMAT="${OUTPUT_DIR}/%(artist|)s%(artist& - |)s%(title)s.%(ext)s"
    YTDL_CMD_BASE="$YTDL_CMD_BASE --audio-format best --audio-quality 0 --extract-audio --recode-video mp3"
    YTDL_CMD="$YTDL_CMD_BASE --output \"$YTDL_OUTPUT_FORMAT\""
    [ ! -f "$ARCHIVE_FILE" ] && exit 1
    while read -r line; do
      video_id=$(echo "$line" | awk '{print $2}')
      YTDL_CMD="$YTDL_CMD_BASE --output \"$YTDL_OUTPUT_FORMAT\" \"https://www.youtube.com/watch?v=$video_id\""
      idnum=$(tsp bash -c "$YTDL_CMD")
      pkill -RTMIN+21 "${STATUSBAR:-dwmblocks}"
    done <"$ARCHIVE_FILE"
    exit 0
    ;;
  *)
    notify-send "⛔ Invalid option: -$OPTARG"
    exit 1
    ;;
  esac
done

shift $((OPTIND - 1))

# Use the first non-option argument as the URL if provided, else from clipboard
URL="${1:-$(xclip -selection clipboard -o)}"
[ -z "$URL" ] && notify-send "⛔ No URL provided and clipboard is empty or does not contain a valid URL." && exit 1

# Validate the URL format
! echo "$URL" | grep -qE '^https?://[a-zA-Z0-9.-]+(/[a-zA-Z0-9./?&%=_-]*)?$' && notify-send "⛔ Invalid URL format: $URL" && exit 1

# Validate URL accessibility
! curl --head --silent --fail "$URL" >/dev/null && notify-send "⛔ URL is not accessible: $URL" && exit 1

case $URL in
*playlist* | *list=*)
  PL_DOWNLOAD_CHOICE=$(printf "playlist\na content" | dmenu -i -p "Download entire playlist or just this content?")
  [ "$PL_DOWNLOAD_CHOICE" = "playlist" ] &&
    YTDL_CMD_BASE=$(echo "$YTDL_CMD_BASE" | sed 's/ --no-playlist//') &&
    YTDL_CMD_BASE="$YTDL_CMD_BASE --yes-playlist" &&
    echo 🪏 >/tmp/qplaylist
  [ "$DOWNLOAD_TYPE" = "video" ] &&
    CHANNEL=$(yt-dlp --print "%(channel)s" "$URL" | head -n 1 | sed 's/, /,/g;s/[\/:*?"<>| ]/-/g' | tr '[:upper:]' '[:lower:]') &&
    PLAYLIST=$(yt-dlp --print "%(playlist_title)s" "$URL" | head -n 1 | sed 's/, /,/g;s/[\/:*?"<>| ]/-/g' | tr '[:upper:]' '[:lower:]') &&
    SUBDIR="${CHANNEL}/${PLAYLIST}" &&
    mkdir -p "${OUTPUT_DIR}/${SUBDIR}" &&
    YTDL_OUTPUT_FORMAT="${OUTPUT_DIR}/${SUBDIR}/%(playlist_index)02d_%(title)s [%(id)s].%(ext)s"
  ;;
esac

SIMULATION_CMD="yt-dlp --simulate --print filename $URL"
YTDL_CMD="$YTDL_CMD_BASE --output \"$YTDL_OUTPUT_FORMAT\" \"$URL\""

# Notify and perform simulation to get filename (feedback to user)
echo "$SIMULATION_CMD" | while IFS= read -r line; do
  filename=$(basename "$line")
  notify-send "📥 Queuing $DOWNLOAD_TYPE to download:" "$filename"
done

# Enqueue the download task with tsp
FILENAME=$($SIMULATION_CMD 2>/dev/null)
rm -rf /tmp/qplaylist
notify-send "⏳ Downloading $DOWNLOAD_TYPE:" "$FILENAME"
idnum=$(tsp bash -c "$YTDL_CMD")
pkill -RTMIN+21 "${STATUSBAR:-dwmblocks}"

# Notify upon completion
tsp -D "$idnum" notify-send "✅ $DOWNLOAD_TYPE download complete:" "$URL"

# Conditionally update the music database if the download type is music
[ "$DOWNLOAD_TYPE" = "music" ] && tsp -D "$idnum" bash -c "mpc update"