#!/bin/bash

# RaspiCar 环境设置脚本
# 下载并设置运行环境（I2C、摄像头、音频等权限）

set -e  # 遇到错误时退出

# 颜色定义
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

# 配置变量
DOWNLOAD_URL="https://240318.xyz/download/RaspiCar/RaspiCar.zip"
INSTALL_DIR="$HOME/RaspiCar"
NTP_SYNC_URL="https://240318.xyz/download/ntp-sync.sh"
NODE_MODULES_URL="https://240318.xyz/download/node_modules.tar.xz"

# 打印带颜色的消息
print_info() {
    echo -e "${GREEN}[INFO]${NC} $1"
}

print_warn() {
    echo -e "${YELLOW}[WARN]${NC} $1"
}

print_error() {
    echo -e "${RED}[ERROR]${NC} $1"
}

print_header() {
    echo ""
    echo "==================================="
    echo "$1"
    echo "==================================="
}

# 检查是否以 root 权限运行
if [[ $EUID -eq 0 ]]; then
    print_error "请不要以 root 用户身份运行此脚本"
    exit 1
fi

print_header "RaspiCar 环境设置脚本"

# 显示当前时间
CURRENT_TIME=$(date "+%Y-%m-%d %H:%M:%S %Z")
print_info "当前时间: ${CURRENT_TIME}"

# ==========================================
# 第一步：交互询问所有选项
# ==========================================
print_header "配置选项"

read -p "是否同步系统时间(阿里云时钟源)? (y/N): " -n 1 -r
echo ""
SYNC_TIME=$([[ $REPLY =~ ^[Yy]$ ]] && echo "true" || echo "false")

read -p "是否更新系统软件源与已安装软件包? (y/N): " -n 1 -r
echo ""
UPDATE_SYSTEM=$([[ $REPLY =~ ^[Yy]$ ]] && echo "true" || echo "false")

read -p "是否下载 node_modules 离线包? (y/N): " -n 1 -r
echo ""
DOWNLOAD_NODE_MODULES=$([[ $REPLY =~ ^[Yy]$ ]] && echo "true" || echo "false")

read -p "是否使用 PulseAudio 模式（与 network-rc 一致，Trixie 建议选 Y）? (Y/n): " -n 1 -r
echo ""
USE_PULSE=$([[ $REPLY =~ ^[Nn]$ ]] && echo "false" || echo "true")

# ==========================================
# 第二步：时间同步（必须先执行，否则无法更新软件源）
# ==========================================
if [ "$SYNC_TIME" = "true" ]; then
    print_header "同步系统时间"
    
    # 检查并安装必要的工具
    if ! command -v wget &> /dev/null; then
        print_info "安装 wget..."
        sudo apt-get update || true
        sudo apt-get install -y wget || true
    fi
    
    NTP_SYNC_FILE="/tmp/ntp-sync.sh"
    
    if wget --no-check-certificate "$NTP_SYNC_URL" -O "$NTP_SYNC_FILE" 2>/dev/null; then
        chmod +x "$NTP_SYNC_FILE"
        print_info "执行时间同步..."
        sudo "$NTP_SYNC_FILE" || print_warn "时间同步失败，但继续执行"
        rm -f "$NTP_SYNC_FILE"
        
        # 显示同步后的时间
        NEW_TIME=$(date "+%Y-%m-%d %H:%M:%S %Z")
        print_info "同步后时间: ${NEW_TIME}"
    else
        print_warn "无法下载 ntp-sync.sh，跳过时间同步"
    fi
else
    print_info "跳过时间同步"
fi

# ==========================================
# 第三步：更新系统软件源和软件包
# ==========================================
if [ "$UPDATE_SYSTEM" = "true" ]; then
    print_header "更新系统软件源和软件包"
    
    print_info "更新软件源..."
    sudo apt-get update || {
        print_error "更新软件源失败，请检查网络连接或时间设置"
        exit 1
    }
    
    print_info "升级已安装的软件包..."
    sudo apt-get upgrade -y || print_warn "软件包升级过程中出现错误，但继续执行"
else
    print_info "跳过系统更新"
fi

# ==========================================
# 第四步：下载项目
# ==========================================
print_header "下载 RaspiCar 项目"

cd "$HOME"

if [ -d "RaspiCar" ]; then
    print_info "发现现有的 RaspiCar 项目目录，跳过下载步骤"
elif [ -f "RaspiCar.zip" ]; then
    print_info "发现现有的 RaspiCar.zip 压缩包"
    
    if ! command -v unzip &> /dev/null; then
        print_info "安装 unzip..."
        sudo apt-get update
        sudo apt-get install -y unzip
    fi
    
    if [ ! -d "RaspiCar" ]; then
        print_info "解压 RaspiCar.zip..."
        unzip -o RaspiCar.zip || {
            print_error "解压失败"
            exit 1
        }
        rm -f RaspiCar.zip
        print_info "已删除压缩包"
    fi
else
    print_info "下载 RaspiCar 项目..."
    
    if ! command -v wget &> /dev/null; then
        print_info "安装 wget..."
        sudo apt-get update
        sudo apt-get install -y wget
    fi
    
    if ! command -v unzip &> /dev/null; then
        print_info "安装 unzip..."
        sudo apt-get install -y unzip
    fi
    
    if wget --no-check-certificate "$DOWNLOAD_URL" -O RaspiCar.zip; then
        print_info "下载成功！"
        print_info "解压 RaspiCar.zip..."
        unzip -o RaspiCar.zip || {
            print_error "解压失败"
            exit 1
        }
        rm -f RaspiCar.zip
        print_info "已删除压缩包"
    else
        print_error "下载失败，请检查网络连接或下载地址"
        exit 1
    fi
fi

# 确认项目目录存在
if [ ! -d "$INSTALL_DIR" ]; then
    print_error "无法找到安装目录 $INSTALL_DIR"
    exit 1
fi

cd "$INSTALL_DIR"

# ==========================================
# 第五步：安装系统依赖
# ==========================================
print_header "安装系统依赖"

# 检查并安装系统包
check_and_install_package() {
    local package=$1
    if dpkg-query -W -f='${Status}' "$package" 2>/dev/null | grep -q "install ok installed"; then
        print_info "$package 已安装，跳过..."
        return 0
    else
        print_info "正在安装 $package..."
        sudo apt-get install -y "$package"
    fi
}

REQUIRED_PACKAGES=(
    "build-essential"
    "python3-dev"
    "libffi-dev"
    "libssl-dev"
    "libuv1-dev"
    "curl"
    "i2c-tools"
    "ffmpeg"
    "alsa-utils"
    "v4l-utils"
    "xz-utils"
    "pv"
    "pulseaudio"
    "pulseaudio-utils"
    "alsa-tools"
)

for package in "${REQUIRED_PACKAGES[@]}"; do
    check_and_install_package "$package"
done

# ==========================================
# 第六步：配置硬件接口
# ==========================================
print_header "配置硬件接口"

print_info "启用 I2C 接口..."
sudo raspi-config nonint do_i2c 0 || print_warn "I2C 配置失败（可能不是树莓派）"

print_info "启用摄像头接口..."
sudo raspi-config nonint do_camera 0 || print_warn "摄像头配置失败（可能不是树莓派）"

print_info "启用串口接口..."
sudo raspi-config nonint do_serial_hw 0 || print_warn "串口配置失败（可能不是树莓派）"

# ==========================================
# 第七步：安装 Node.js
# ==========================================
print_header "安装 Node.js"

if command -v node &> /dev/null && command -v npm &> /dev/null; then
    NODE_VERSION=$(node --version)
    NPM_VERSION=$(npm --version)
    print_info "Node.js 已安装: $NODE_VERSION"
    print_info "NPM 已安装: $NPM_VERSION"
    
    if [[ ! $NODE_VERSION == v18.* ]]; then
        print_info "Node.js 版本不是 18.x，正在安装 Node.js 18..."
        curl -fsSL https://deb.nodesource.com/setup_18.x | sudo -E bash -
        sudo apt-get install -y nodejs
    fi
else
    print_info "安装 Node.js 18..."
    curl -fsSL https://deb.nodesource.com/setup_18.x | sudo -E bash -
    sudo apt-get install -y nodejs
fi

print_info "验证 Node.js 和 npm 安装..."
node --version
npm --version

# ==========================================
# 第八步：处理 node_modules
# ==========================================
print_header "处理 node_modules"

NM_DIR="$INSTALL_DIR/node_modules"
NM_TAR="$INSTALL_DIR/node_modules.tar.xz"
NODE_MODULES_READY=false

if [ -d "$NM_DIR" ] && [ "$(ls -A "$NM_DIR" 2>/dev/null)" ]; then
    print_info "检测到 node_modules，跳过解压"
    NODE_MODULES_READY=true
else
    if [ "$DOWNLOAD_NODE_MODULES" = "true" ]; then
        if [ ! -f "$NM_TAR" ]; then
            print_info "下载 node_modules 离线包..."
            if wget --progress=bar:force --no-check-certificate "$NODE_MODULES_URL" -O "$NM_TAR"; then
                print_info "下载完成"
            else
                print_warn "下载失败，将使用 npm install"
                rm -f "$NM_TAR"
            fi
        fi
        
        if [ -f "$NM_TAR" ]; then
            print_info "解压 node_modules..."
            mkdir -p "$NM_DIR"
            
            # 检测压缩包结构
            NM_TAR_FIRST=$(tar -tf "$NM_TAR" 2>/dev/null | head -n 1 || echo "")
            STRIP_COMPONENTS=0
            
            if echo "$NM_TAR_FIRST" | grep -q '^node_modules/'; then
                EXTRACT_DIR="$INSTALL_DIR"
            else
                # 查找 node_modules 路径
                NM_TAR_NODE_PATH=$(tar -tf "$NM_TAR" 2>/dev/null | grep -m1 -E '(^|/)(node_modules/)' || echo "")
                if [ -n "$NM_TAR_NODE_PATH" ]; then
                    PREFIX="${NM_TAR_NODE_PATH%%/node_modules/*}"
                    if [ -n "$PREFIX" ] && [ "$PREFIX" != "$NM_TAR_NODE_PATH" ]; then
                        STRIP_COMPONENTS=$(echo "$PREFIX" | awk -F/ '{print NF}')
                        EXTRACT_DIR="$INSTALL_DIR"
                    else
                        EXTRACT_DIR="$NM_DIR"
                    fi
                else
                    EXTRACT_DIR="$NM_DIR"
                fi
            fi
            
            # 解压
            if command -v pv &> /dev/null; then
                if [ "$STRIP_COMPONENTS" -gt 0 ]; then
                    pv -pte -s "$(stat -c%s "$NM_TAR")" "$NM_TAR" | tar -xJf - -C "$EXTRACT_DIR" --strip-components="$STRIP_COMPONENTS" || {
                        print_warn "解压失败，将使用 npm install"
                        rm -rf "$NM_DIR"
                    }
                else
                    pv -pte -s "$(stat -c%s "$NM_TAR")" "$NM_TAR" | tar -xJf - -C "$EXTRACT_DIR" || {
                        print_warn "解压失败，将使用 npm install"
                        rm -rf "$NM_DIR"
                    }
                fi
            else
                if [ "$STRIP_COMPONENTS" -gt 0 ]; then
                    tar -xJf "$NM_TAR" -C "$EXTRACT_DIR" --strip-components="$STRIP_COMPONENTS" || {
                        print_warn "解压失败，将使用 npm install"
                        rm -rf "$NM_DIR"
                    }
                else
                    tar -xJf "$NM_TAR" -C "$EXTRACT_DIR" || {
                        print_warn "解压失败，将使用 npm install"
                        rm -rf "$NM_DIR"
                    }
                fi
            fi
            
            # 验证解压结果
            if [ -d "$NM_DIR" ] && [ -n "$(ls -A "$NM_DIR" 2>/dev/null)" ]; then
                print_info "node_modules 解压完成"
                NODE_MODULES_READY=true
                rm -f "$NM_TAR"
            else
                print_warn "node_modules 为空或解压失败，将使用 npm install"
                rm -rf "$NM_DIR"
            fi
        fi
    fi
    
    # 如果 node_modules 未准备好，使用 npm install
    if [ "$NODE_MODULES_READY" != "true" ]; then
        print_info "使用 npm install 安装依赖..."
        npm install || {
            print_error "npm install 失败"
            exit 1
        }
    fi
fi

# ==========================================
# 第九步：配置硬件访问权限
# ==========================================
print_header "配置硬件访问权限"

print_info "添加用户到硬件组..."
sudo usermod -a -G gpio,i2c,audio,video,dialout "$USER" || print_warn "添加用户组失败"

# ==========================================
# 第十步：配置音频设备（与程序匹配）
# ==========================================
print_header "配置音频设备"

# 检测录音设备（优先 USB 麦克风）
MIC_LINE=$(arecord -l 2>/dev/null | grep -Ei "card [0-9]+:.*(USB|usb)" | head -n1)
if [ -z "$MIC_LINE" ]; then
    MIC_LINE=$(arecord -l 2>/dev/null | grep -E "card [0-9]+:" | head -n1)
fi

MIC_CARD=$(echo "$MIC_LINE" | sed -n 's/card \([0-9]\+\):.*/\1/p')
MIC_DEVICE=$(echo "$MIC_LINE" | sed -n 's/.*device \([0-9]\+\):.*/\1/p')
if [ -z "$MIC_DEVICE" ]; then
    MIC_DEVICE=0
fi

# 检测播放设备（优先耳机口）
PLAYBACK_CARD=$(aplay -l 2>/dev/null | grep -E "Headphones|bcm2835 Headphones" | head -n1 | sed -n 's/card \([0-9]\+\):.*/\1/p')
if [ -z "$PLAYBACK_CARD" ]; then
    PLAYBACK_CARD=$(aplay -l 2>/dev/null | grep -E "card [0-9]+:" | head -n1 | sed -n 's/card \([0-9]\+\):.*/\1/p')
fi
if [ -z "$PLAYBACK_CARD" ]; then
    PLAYBACK_CARD=0
fi

# 创建 ALSA 配置
ALSA_CONFIG="$HOME/.asoundrc"
if [ -n "$MIC_CARD" ]; then
    print_info "检测到录音设备: card $MIC_CARD, device $MIC_DEVICE"
    print_info "检测到播放设备卡号: $PLAYBACK_CARD"
    
    cat > "$ALSA_CONFIG" << EOF
pcm.usbmic {
    type hw
    card $MIC_CARD
    device $MIC_DEVICE
}

pcm.!default {
    type asym
    playback.pcm {
        type plug
        slave.pcm "hw:$PLAYBACK_CARD,0"
    }
    capture.pcm {
        type plug
        slave.pcm "hw:$MIC_CARD,$MIC_DEVICE"
    }
}

ctl.!default {
    type hw
    card $PLAYBACK_CARD
}
EOF
    print_info "ALSA 配置完成: $ALSA_CONFIG"
else
    print_warn "未检测到录音设备，创建默认配置"
    cat > "$ALSA_CONFIG" << EOF
pcm.!default {
    type asym
    playback.pcm "plug:hw:0,0"
    capture.pcm "plug:hw:0,0"
}
ctl.!default { type hw; card 0; }
EOF
fi

# 创建环境变量文件（与程序匹配）
ENV_RASPICAR="$INSTALL_DIR/.env.raspicar"
if [ -n "$MIC_CARD" ]; then
    # 程序使用 ffmpeg -f alsa -i device，所以使用 plughw 格式
    cat > "$ENV_RASPICAR" << EOF
# 由 setup-raspicar.sh 生成，供麦克风采集使用
# 程序使用 ffmpeg -f alsa 采集，设备格式为 plughw:card,device
export NRC_MIC_DEVICE=plughw:$MIC_CARD,$MIC_DEVICE
EOF
    if [ "$USE_PULSE" = "true" ]; then
        # 如果使用 PulseAudio，程序启动时会 kill PulseAudio，需要保留它
        cat >> "$ENV_RASPICAR" << EOF
# 保留 PulseAudio（程序启动时会尝试 kill，设置此变量可避免）
export NRC_AUDIO_KEEP_PULSE=1
# 使用 PulseAudio 采集（如果程序支持）
export NRC_MIC_CAPTURE=pulse
EOF
    fi
else
    cat > "$ENV_RASPICAR" << EOF
# 由 setup-raspicar.sh 生成（未检测到麦克风时使用默认）
export NRC_MIC_DEVICE=default
EOF
    if [ "$USE_PULSE" = "true" ]; then
        cat >> "$ENV_RASPICAR" << EOF
export NRC_AUDIO_KEEP_PULSE=1
export NRC_MIC_CAPTURE=pulse
EOF
    fi
fi
print_info "已写入麦克风环境变量: $ENV_RASPICAR"
print_info "环境变量内容："
cat "$ENV_RASPICAR"

# ==========================================
# 第十一步：配置音频服务
# ==========================================
print_header "配置音频服务"

if [ "$USE_PULSE" = "true" ]; then
    # 检测 PipeWire
    USE_PIPEWIRE=false
    if systemctl --user is-active --quiet pipewire 2>/dev/null || \
       systemctl --user is-active --quiet pipewire-pulse 2>/dev/null || \
       pgrep -x pipewire >/dev/null 2>&1; then
        USE_PIPEWIRE=true
    fi
    
    if [ "$USE_PIPEWIRE" = "true" ]; then
        print_info "检测到 PipeWire，保留并使用其 Pulse 兼容层..."
        systemctl --user unmask pipewire pipewire-pulse wireplumber 2>/dev/null || true
        systemctl --user unmask pipewire.socket pipewire-pulse.socket 2>/dev/null || true
        systemctl --user enable pipewire.socket pipewire-pulse.socket 2>/dev/null || true
        systemctl --user start pipewire.socket pipewire-pulse.socket 2>/dev/null || true
        systemctl --user start pipewire pipewire-pulse wireplumber 2>/dev/null || true
        
        systemctl --user stop pulseaudio pulseaudio.socket 2>/dev/null || true
        systemctl --user disable pulseaudio pulseaudio.socket 2>/dev/null || true
        systemctl --user mask pulseaudio pulseaudio.socket 2>/dev/null || true
    else
        print_info "使用 PulseAudio 模式..."
        systemctl --user stop pipewire pipewire-pulse wireplumber 2>/dev/null || true
        systemctl --user stop pipewire.socket pipewire-pulse.socket 2>/dev/null || true
        pkill -f pipewire 2>/dev/null || true
        pkill -f wireplumber 2>/dev/null || true
        
        systemctl --user unmask pulseaudio pulseaudio.socket 2>/dev/null || true
        systemctl --user enable pulseaudio.socket 2>/dev/null || true
        systemctl --user start pulseaudio.socket 2>/dev/null || true
        systemctl --user start pulseaudio 2>/dev/null || true
        
        systemctl --user disable pipewire pipewire-pulse wireplumber 2>/dev/null || true
        systemctl --user disable pipewire.socket pipewire-pulse.socket 2>/dev/null || true
        systemctl --user mask pipewire pipewire-pulse wireplumber 2>/dev/null || true
        systemctl --user mask pipewire.socket pipewire-pulse.socket 2>/dev/null || true
    fi
else
    print_info "禁用音频服务（PipeWire / PulseAudio）..."
    pulseaudio -k 2>/dev/null || true
    systemctl --user stop pipewire pipewire-pulse wireplumber 2>/dev/null || true
    systemctl --user stop pipewire.socket pipewire-pulse.socket 2>/dev/null || true
    systemctl --user stop pulseaudio pulseaudio.socket 2>/dev/null || true
    pkill -f pipewire 2>/dev/null || true
    pkill -f wireplumber 2>/dev/null || true
    sleep 1
    
    systemctl --user disable pipewire pipewire-pulse wireplumber 2>/dev/null || true
    systemctl --user disable pipewire.socket pipewire-pulse.socket 2>/dev/null || true
    systemctl --user disable pulseaudio pulseaudio.socket 2>/dev/null || true
    systemctl --user mask pipewire pipewire-pulse wireplumber 2>/dev/null || true
    systemctl --user mask pipewire.socket pipewire-pulse.socket 2>/dev/null || true
    systemctl --user mask pulseaudio pulseaudio.socket 2>/dev/null || true
fi

# 配置音频权限
print_info "配置音频设备权限..."
sudo chmod 666 /dev/snd/* 2>/dev/null || print_warn "无法设置音频设备权限"

# 创建 udev 规则
print_info "创建 USB 设备 udev 规则..."
sudo tee /etc/udev/rules.d/99-usb-permissions.rules > /dev/null << EOF
# USB 音频设备
SUBSYSTEM=="sound", GROUP="audio", MODE="0666"
SUBSYSTEM=="usb", ATTRS{idVendor}=="046d", GROUP="video", MODE="0666"
SUBSYSTEM=="video4linux", GROUP="video", MODE="0666"
EOF

sudo udevadm control --reload-rules
sudo udevadm trigger

# ==========================================
# 第十二步：创建启动脚本
# ==========================================
print_header "创建启动脚本"

if [ ! -f "$INSTALL_DIR/run.sh" ]; then
    cat > "$INSTALL_DIR/run.sh" << 'RUNEOF'
#!/bin/bash
# RaspiCar 启动脚本：自动加载麦克风环境变量后启动
cd "$(dirname "$0")"
[ -f .env.raspicar ] && source .env.raspicar
exec node index.js
RUNEOF
    chmod +x "$INSTALL_DIR/run.sh"
    print_info "已创建启动脚本: $INSTALL_DIR/run.sh"
fi

# ==========================================
# 第十三步：安装 systemd 服务（直接写入系统）
# ==========================================
print_header "安装 systemd 服务"

SERVICE_FILE="/etc/systemd/system/raspicar.service"

print_info "写入服务文件到 $SERVICE_FILE ..."
sudo tee "$SERVICE_FILE" > /dev/null << EOF
[Unit]
Description=RaspiCar Service
After=network.target

[Service]
Type=simple
User=$USER
WorkingDirectory=$INSTALL_DIR
Environment="NODE_ENV=production"
EnvironmentFile=-$INSTALL_DIR/.env.raspicar
ExecStart=/usr/bin/node $INSTALL_DIR/index.js
Restart=always
RestartSec=10
StandardOutput=journal
StandardError=journal

NoNewPrivileges=true
PrivateTmp=true

[Install]
WantedBy=multi-user.target
EOF

print_info "重新加载 systemd..."
sudo systemctl daemon-reload

print_info "启用服务（开机自启）..."
sudo systemctl enable raspicar.service

# 配置 sudo 免密（用于前端重启服务功能）
print_info "配置 sudo 免密（用于重启服务功能）..."
SUDOERS_FILE="/etc/sudoers.d/raspicar"
if [ ! -f "$SUDOERS_FILE" ]; then
    echo "$USER ALL=(ALL) NOPASSWD: /bin/systemctl restart raspicar.service" | sudo tee "$SUDOERS_FILE" > /dev/null
    sudo chmod 0440 "$SUDOERS_FILE"
    print_info "已配置 sudo 免密"
else
    print_info "sudo 配置已存在，跳过"
fi

print_info "服务已安装并启用"
print_info "服务管理命令："
echo "  sudo systemctl start raspicar    # 启动服务"
echo "  sudo systemctl stop raspicar     # 停止服务"
echo "  sudo systemctl restart raspicar  # 重启服务"
echo "  sudo systemctl status raspicar   # 查看状态"
echo "  sudo systemctl disable raspicar  # 禁用开机自启"
echo "  sudo journalctl -u raspicar -f   # 查看实时日志"

# ==========================================
# 完成
# ==========================================
print_header "环境设置完成！"

print_info "项目位于: $INSTALL_DIR"

if [ -f "$SERVICE_FILE" ]; then
    print_info "systemd 服务已安装"
    print_info "启动服务："
    echo "  sudo systemctl start raspicar"
    echo ""
    print_info "服务将在开机时自动启动"
else
    print_warn "请先重启树莓派"
    print_info "运行程序命令："
    echo "  cd $INSTALL_DIR && ./run.sh"
    echo "或手动: cd $INSTALL_DIR && ( [ -f .env.raspicar ] && source .env.raspicar; node index.js )"
fi

echo ""
print_info "音频配置说明："
echo "  - 程序使用 ffmpeg -f alsa 采集音频"
echo "  - 设备格式：plughw:card,device（已自动检测并配置）"
echo "  - 环境变量文件：$ENV_RASPICAR"
if [ "$USE_PULSE" = "true" ]; then
    echo "  - 已启用 PulseAudio 模式（程序启动时会尝试 kill，但设置了 NRC_AUDIO_KEEP_PULSE=1）"
fi
echo ""
print_info "音频问题排查："
echo "  1. 是否已重启树莓派"
echo "  2. 运行前是否加载环境变量: source $INSTALL_DIR/.env.raspicar 或直接 ./run.sh"
echo "  3. Debian Trixie 默认使用 PipeWire，建议选择「使用 PulseAudio」"
echo ""
echo "检查音频状态："
echo "  - aplay -l  # 列出播放设备"
echo "  - arecord -l  # 列出录音设备"
echo "  - alsamixer  # 音频混音器"
echo "  - sudo fuser -v /dev/snd/*  # 查看占用音频设备的进程"