import subprocess
import re

def get_current_volume():
    """
    获取当前音量
    :return: 当前音量百分比（0 到 100）
    """
    try:
        # 使用 amixer 命令获取音量信息
        print("运行 amixer 命令以获取音量信息...")  # 先确保能看到此信息
        result = subprocess.run(
            ["/usr/bin/amixer", "-D", "pulse", "get", "Master"],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            text=True
        )

        print(f"amixer 命令返回的退出码: {result.returncode}")
        print(f"amixer 命令输出: {result.stdout}")
        print(f"amixer 错误输出: {result.stderr}")

        if result.returncode == 0:
            # 解析返回的音量信息
            output = result.stdout
            match = re.search(r"(\d+)%", output)
            if match:
                volume = int(match.group(1))  # 返回音量百分比
                print(f"当前音量: {volume}%")
                return volume
            else:
                print("没有找到音量信息")
                return None  # 如果未找到音量信息
        else:
            print(f"amixer 执行失败，错误输出: {result.stderr}")
            return None
    except Exception as e:
        print(f"发生错误: {e}")
        return None


def adjust_volume(adjust_volumn_result):
    """
    调整音量（增加、减少或设置）
    :param adjust_volumn_result: 包含音量调整指令的字符串，格式可以是 '+10'、'-10' 或 '=50'
    """
    try:
        print(f"收到的音量调整指令: {adjust_volumn_result}")
        if "+" in adjust_volumn_result:
            volume_change = int(re.search(r'\+(\d+)', adjust_volumn_result).group(1))
            print(f"增加音量: {volume_change}%")
            subprocess.run(["/usr/bin/amixer", "-D", "pulse", "sset", "Master", f"{volume_change}%+"])
        elif "-" in adjust_volumn_result:
            volume_change = int(re.search(r'-(\d+)', adjust_volumn_result).group(1))
            print(f"减少音量: {volume_change}%")
            subprocess.run(["/usr/bin/amixer", "-D", "pulse", "sset", "Master", f"{volume_change}%-"])
        elif "=" in adjust_volumn_result:
            volume_set = int(re.search(r'=(\d+)', adjust_volumn_result).group(1))
            print(f"设置音量为: {volume_set}%")
            subprocess.run(["/usr/bin/amixer", "-D", "pulse", "sset", "Master", f"{volume_set}%"])
        else:
            print("无效的音量指令！")
    except Exception as e:
        print(f"调整音量时出错: {e}")