#!/usr/bin/env bash
set -Eeuo pipefail

# Usage:
#   ./download_mp3s.sh links.txt [output_dir]
#
# links.txt: text file containing one URL per line
# output_dir: optional destination directory (default: ./downloads)

LINKS_FILE="${1:-links.txt}"
OUTDIR="${2:-downloads}"

if ! command -v yt-dlp >/dev/null 2>&1; then
    echo "Error: yt-dlp not found."
    exit 1
fi

if ! command -v ffmpeg >/dev/null 2>&1; then
    echo "Error: ffmpeg not found."
    exit 1
fi

mkdir -p "$OUTDIR"

yt-dlp \
    --newline \
    --ignore-errors \
    --extract-audio \
    --audio-format mp3 \
    --audio-quality 0 \
    --embed-metadata \
    --embed-thumbnail \
    --add-metadata \
    --parse-metadata "%(artist|)s:%(meta_artist)s" \
    --convert-thumbnails jpg \
    --output "$OUTDIR/%(uploader)s - %(title)s.%(ext)s" \
    -a "$LINKS_FILE"

echo "Done."