#!/usr/bin/env bash
# 卸载历史上可能安装过的 kaisa-hdmi-pipewire-fix（apt purge），并 reinstall alsa-ucm-conf
# 以恢复发行版自带的 UCM 文件（与 apply-kaisa-pro-audio.sh 中 KEEP_DEB=0 时前两步一致）。
#
# 不改动用户级 WirePlumber；不自动重启 PipeWire。若曾用手工 UCM overlay，另见
#   ./scripts/remove-kaisa-ucm-overlay.sh
# 若要走 pro-audio 主路线，purge 完成后可执行：
#   ./scripts/apply-kaisa-pro-audio.sh --keep-deb
#
# 用法：
#   ./scripts/remove-kaisa-hdmi-deb.sh
#   ./scripts/remove-kaisa-hdmi-deb.sh --no-reinstall-ucm   # 仅 purge，不 touch alsa-ucm-conf
set -euo pipefail

NO_REINSTALL=0
while [[ $# -gt 0 ]]; do
	case "$1" in
	--no-reinstall-ucm) NO_REINSTALL=1 ;;
	-h|--help)
		sed -n '2,18p' "$0" | sed 's/^# \{0,1\}//'
		exit 0
		;;
	*)
		echo "未知参数: $1（用 --help）" >&2
		exit 1
		;;
	esac
	shift
done

if ! command -v sudo &>/dev/null; then
	echo "需要 sudo。" >&2
	exit 1
fi

if dpkg -s kaisa-hdmi-pipewire-fix &>/dev/null; then
	echo ">>> apt purge -y kaisa-hdmi-pipewire-fix"
	sudo apt purge -y kaisa-hdmi-pipewire-fix
else
	echo "(dpkg 无已登记包 kaisa-hdmi-pipewire-fix，跳过 purge；若曾改名安装请自行 apt purge 包名)"
fi

if [[ "$NO_REINSTALL" -eq 0 ]]; then
	echo ">>> apt install --reinstall -y alsa-ucm-conf"
	sudo apt install --reinstall -y alsa-ucm-conf
else
	echo "(--no-reinstall-ucm：跳过 alsa-ucm-conf reinstall)"
fi

echo "remove-kaisa-hdmi-deb: 完成。建议登录用户会话下: systemctl --user restart wireplumber pipewire pipewire-pulse"
echo "若仍有手工 UCM: ./scripts/remove-kaisa-ucm-overlay.sh"
echo "若应用 pro-audio: ./scripts/apply-kaisa-pro-audio.sh --keep-deb"