#!/usr/bin/env bash
# bin/install-yt-dlp — fetch the standalone yt-dlp binary into the backend's
# bin/ directory. No Python required at runtime — this downloads the
# self-contained executable from GitHub releases.
#
# The backend's downloader package spawns this binary (or "yt-dlp" on PATH).
# Prefer `sudo pacman -S yt-dlp` if you want system package management; this
# script is the self-contained alternative.
#
# Run:  bin/install-yt-dlp

set -euo pipefail

HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"          # <root>/bin
ROOT="$(cd "$HERE/.." && pwd)"                                 # workspace root
DEST="$ROOT/yt-music-dl-backend/bin"
mkdir -p "$DEST"

# Resolve the latest release tag + URL for the standalone binary.
API="https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest"
echo "[install-yt-dlp] resolving latest release…"
ASSET_URL="$(curl -fsSL "$API" \
	| grep -oE '"browser_download_url":\s*"[^"]*yt-dlp_linux"' \
	| head -1 \
	| sed -E 's/.*"([^"]+)"/\1/')"

if [ -z "$ASSET_URL" ]; then
	# Fall back to the generic unix binary (older naming) if the linux asset isn't found.
	ASSET_URL="$(curl -fsSL "$API" \
		| grep -oE '"browser_download_url":\s*"[^"]*yt-dlp"' \
		| head -1 \
		| sed -E 's/.*"([^"]+)"/\1/')"
fi

if [ -z "$ASSET_URL" ]; then
	echo "install-yt-dlp: could not find a standalone binary in the latest release." >&2
	echo "Install via your package manager instead:  sudo pacman -S yt-dlp" >&2
	exit 1
fi

echo "[install-yt-dlp] downloading: $ASSET_URL"
curl -fsSL "$ASSET_URL" -o "$DEST/yt-dlp"
chmod +x "$DEST/yt-dlp"
echo "[install-yt-dlp] installed → $DEST/yt-dlp"
"$DEST/yt-dlp" --version
echo
echo "[install-yt-dlp] set YTMDL_YTDLP_PATH=$DEST/yt-dlp in your .env if yt-dlp is not on PATH."