diskmanager/mainwindow.py

# mainwindow.py
import sys
import logging
import re
import os

from PySide6.QtWidgets import (QApplication, QMainWindow, QTreeWidgetItem,
                               QMessageBox, QHeaderView, QMenu, QInputDialog, QDialog)
from PySide6.QtCore import Qt, QPoint, QThread # <--- 确保导入 QThread

# 导入自动生成的 UI 文件
from ui_form import Ui_MainWindow
# 导入我们自己编写的系统信息管理模块
from system_info import SystemInfoManager
# 导入日志配置
from logger_config import setup_logging, logger
# 导入磁盘操作模块
from disk_operations import DiskOperations
# 导入 RAID 操作模块
from raid_operations import RaidOperations
# 导入 LVM 操作模块
from lvm_operations import LvmOperations
# 导入自定义对话框
from dialogs import (CreatePartitionDialog, MountDialog, CreateRaidDialog,
                     CreatePvDialog, CreateVgDialog, CreateLvDialog)


class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)

        setup_logging(self.ui.logOutputTextEdit)
        logger.info("应用程序启动。")

        # 初始化管理器和操作类
        self.system_manager = SystemInfoManager()
        self.lvm_ops = LvmOperations() # <--- 先初始化 LvmOperations
        # <--- 将 lvm_ops 实例传递给 DiskOperations
        self.disk_ops = DiskOperations(self.system_manager, self.lvm_ops)
        self.raid_ops = RaidOperations()
        # self.lvm_ops = LvmOperations() # 这一行是重复的，可以删除

        # 连接刷新按钮的信号到槽函数
        if hasattr(self.ui, 'refreshButton'):
            self.ui.refreshButton.clicked.connect(self.refresh_all_info)
        else:
            logger.warning("Warning: refreshButton not found in UI. Please add it in form.ui and regenerate ui_form.py.")

        # 启用 treeWidget 的自定义上下文菜单
        self.ui.treeWidget_block_devices.setContextMenuPolicy(Qt.CustomContextMenu)
        self.ui.treeWidget_block_devices.customContextMenuRequested.connect(self.show_block_device_context_menu)

        self.ui.treeWidget_raid.setContextMenuPolicy(Qt.CustomContextMenu)
        self.ui.treeWidget_raid.customContextMenuRequested.connect(self.show_raid_context_menu)

        self.ui.treeWidget_lvm.setContextMenuPolicy(Qt.CustomContextMenu)
        self.ui.treeWidget_lvm.customContextMenuRequested.connect(self.show_lvm_context_menu)

        # <--- 新增: 连接 DiskOperations 的格式化完成信号
        self.disk_ops.formatting_finished.connect(self.on_disk_formatting_finished)
        # 可选：连接格式化开始信号，用于显示进度或禁用相关操作
        # self.disk_ops.formatting_started.connect(self.on_disk_formatting_started)

        # 初始化时刷新所有数据
        self.refresh_all_info()
        logger.info("所有设备信息已初始化加载。")

    def refresh_all_info(self):
        """
        刷新所有设备信息：块设备、RAID和LVM。
        """
        logger.info("开始刷新所有设备信息...")
        self.refresh_block_devices_info()
        self.refresh_raid_info()
        self.refresh_lvm_info()
        logger.info("所有设备信息刷新完成。")

    # --- 块设备概览 Tab ---
    def refresh_block_devices_info(self):
        self.ui.treeWidget_block_devices.clear()

        columns = [
            ("设备名", 'name'), ("类型", 'type'), ("大小", 'size'), ("挂载点", 'mountpoint'),
            ("文件系统", 'fstype'), ("只读", 'ro'), ("UUID", 'uuid'), ("PARTUUID", 'partuuid'),
            ("厂商", 'vendor'), ("型号", 'model'), ("序列号", 'serial'),
            ("主次号", 'maj:min'), ("父设备名", 'pkname'),
        ]

        headers = [col[0] for col in columns]
        self.field_keys = [col[1] for col in columns]

        self.ui.treeWidget_block_devices.setColumnCount(len(headers))
        self.ui.treeWidget_block_devices.setHeaderLabels(headers)

        for i in range(len(headers)):
            self.ui.treeWidget_block_devices.header().setSectionResizeMode(i, QHeaderView.ResizeToContents)

        try:
            devices = self.system_manager.get_block_devices()
            for dev in devices:
                self._add_device_to_tree(self.ui.treeWidget_block_devices, dev)

            for i in range(len(headers)):
                self.ui.treeWidget_block_devices.resizeColumnToContents(i)
            logger.info("块设备信息刷新成功。")

        except Exception as e:
            QMessageBox.critical(self, "错误", f"刷新块设备信息失败: {e}")
            logger.error(f"刷新块设备信息失败: {e}")

    def _add_device_to_tree(self, parent_item, dev_data):
        item = QTreeWidgetItem(parent_item)
        for i, key in enumerate(self.field_keys):
            value = dev_data.get(key)
            if key == 'ro':
                item.setText(i, "是" if value else "否")
            elif value is None:
                item.setText(i, "")
            else:
                item.setText(i, str(value))

        item.setData(0, Qt.UserRole, dev_data)

        if 'children' in dev_data:
            for child in dev_data['children']:
                self._add_device_to_tree(item, child)
            item.setExpanded(True)

    def show_block_device_context_menu(self, pos: QPoint):
        item = self.ui.treeWidget_block_devices.itemAt(pos)
        menu = QMenu(self)

        create_menu = QMenu("创建...", self)
        create_raid_action = create_menu.addAction("创建 RAID 阵列...")
        create_raid_action.triggered.connect(self._handle_create_raid_array)
        create_pv_action = create_menu.addAction("创建物理卷 (PV)...")
        create_pv_action.triggered.connect(self._handle_create_pv)
        menu.addMenu(create_menu)
        menu.addSeparator()

        if item:
            dev_data = item.data(0, Qt.UserRole)
            if not dev_data:
                logger.warning(f"无法获取设备 {item.text(0)} 的详细数据。")
                return

            device_name = dev_data.get('name')
            device_type = dev_data.get('type')
            mount_point = dev_data.get('mountpoint')
            device_path = dev_data.get('path')

            if not device_path:
                device_path = f"/dev/{device_name}"

            if device_type == 'disk':
                create_partition_action = menu.addAction(f"创建分区 {device_path}...")
                create_partition_action.triggered.connect(lambda: self._handle_create_partition(device_path, dev_data))
                # --- 新增功能：擦除分区表 ---
                wipe_action = menu.addAction(f"擦除分区表 {device_path}...")
                wipe_action.triggered.connect(lambda: self._handle_wipe_partition_table(device_path))
                # --- 新增功能结束 ---
                menu.addSeparator()

            if device_type == 'part':
                if not mount_point or mount_point == '' or mount_point == 'N/A':
                    mount_action = menu.addAction(f"挂载 {device_path}...")
                    mount_action.triggered.connect(lambda: self._handle_mount(device_path))
                elif mount_point != '[SWAP]':
                    unmount_action = menu.addAction(f"卸载 {device_path}")
                    unmount_action.triggered.connect(lambda: self._unmount_and_refresh(device_path))
                menu.addSeparator()

                delete_action = menu.addAction(f"删除分区 {device_path}")
                delete_action.triggered.connect(lambda: self._handle_delete_partition(device_path))

                format_action = menu.addAction(f"格式化分区 {device_path}...")
                format_action.triggered.connect(lambda: self._handle_format_partition(device_path))

        if menu.actions():
            menu.exec(self.ui.treeWidget_block_devices.mapToGlobal(pos))
        else:
            logger.info("右键点击了空白区域或设备没有可用的操作。")

    # --- 新增方法：处理擦除分区表 ---
    def _handle_wipe_partition_table(self, device_path):
        """
        处理擦除物理盘分区表的操作。
        """
        reply = QMessageBox.question(
            self,
            "确认擦除分区表",
            f"您确定要擦除设备 {device_path} 上的所有分区表吗？\n"
            f"**此操作将永久删除设备上的所有分区和数据，且不可恢复！**\n"
            f"请谨慎操作！",
            QMessageBox.Yes | QMessageBox.No,
            QMessageBox.No
        )
        if reply == QMessageBox.No:
            logger.info(f"用户取消了擦除 {device_path} 分区表的操作。")
            return

        logger.warning(f"尝试擦除 {device_path} 上的分区表。")
        # 使用 LvmOperations 中通用的 _execute_shell_command 来执行 parted 命令
        # 这里不需要 show_dialog=False，因为这个操作本身就是同步且需要用户确认的
        success, _, stderr = self.lvm_ops._execute_shell_command(
            ["parted", "-s", device_path, "mklabel", "gpt"], # 默认使用 gpt 分区表类型
            f"擦除 {device_path} 上的分区表失败"
        )

        if success:
            QMessageBox.information(self, "成功", f"设备 {device_path} 上的分区表已成功擦除。")
            self.refresh_all_info()
        else:
            # 错误信息已由 _execute_shell_command 处理并显示
            pass
    # --- 新增方法结束 ---

    def _handle_create_partition(self, disk_path, dev_data):
            total_disk_mib = 0.0
            total_size_str = dev_data.get('size')
            logger.debug(f"尝试为磁盘 {disk_path} 创建分区。原始大小字符串: '{total_size_str}'")

            if total_size_str:
                match = re.match(r'(\d+(\.\d+)?)\s*([KMGT]?B?)', total_size_str, re.IGNORECASE)
                if match:
                    value = float(match.group(1))
                    unit = match.group(3).upper() if match.group(3) else ''

                    if unit == 'KB' or unit == 'K': total_disk_mib = value / 1024
                    elif unit == 'MB' or unit == 'M': total_disk_mib = value
                    elif unit == 'GB' or unit == 'G': total_disk_mib = value * 1024
                    elif unit == 'TB' or unit == 'T': total_disk_mib = value * 1024 * 1024
                    elif unit == 'B':
                         total_disk_mib = value / (1024 * 1024)
                    else:
                        logger.warning(f"无法识别磁盘 {disk_path} 的大小单位: '{unit}' (原始: '{total_size_str}')")
                        total_disk_mib = 0.0
                    logger.debug(f"解析后的磁盘总大小 (MiB): {total_disk_mib}")
                else:
                    logger.warning(f"无法解析磁盘 {disk_path} 的大小字符串 '{total_size_str}'。正则表达式不匹配。")
                    total_disk_mib = 0.0
            else:
                logger.warning(f"获取磁盘 {disk_path} 的大小字符串为空或None。")
                total_disk_mib = 0.0

            if total_disk_mib <= 0.0:
                QMessageBox.critical(self, "错误", f"无法获取磁盘 {disk_path} 的有效总大小。")
                return

            start_position_mib = 0.0
            max_available_mib = total_disk_mib

            if dev_data.get('children'):
                logger.debug(f"磁盘 {disk_path} 存在现有分区，尝试计算下一个分区起始位置。")
                # 假设 disk_ops.get_disk_free_space_info_mib 能够正确处理
                calculated_start_mib, largest_free_space_mib = self.disk_ops.get_disk_free_space_info_mib(disk_path, total_disk_mib)
                if calculated_start_mib is None or largest_free_space_mib is None:
                    QMessageBox.critical(self, "错误", f"无法确定磁盘 {disk_path} 的分区起始位置。")
                    return
                start_position_mib = calculated_start_mib
                max_available_mib = largest_free_space_mib
                if max_available_mib < 0:
                    max_available_mib = 0.0
            else:
                logger.debug(f"磁盘 {disk_path} 没有现有分区，假定从 0 MiB 开始，最大可用空间为整个磁盘。")
                max_available_mib = max(0.0, total_disk_mib - 1.0) # 留一点空间，避免边界问题
                start_position_mib = 1.0 # 现代分区表通常从1MB或更大偏移开始
                logger.debug(f"磁盘 {disk_path} 没有现有分区，假定从 {start_position_mib} MiB 开始，最大可用空间为 {max_available_mib} MiB。")

            dialog = CreatePartitionDialog(self, disk_path, total_disk_mib, max_available_mib)
            if dialog.exec() == QDialog.Accepted:
                info = dialog.get_partition_info()
                if info:
                    if self.disk_ops.create_partition(
                        info['disk_path'],
                        info['partition_table_type'],
                        info['size_gb'],
                        info['total_disk_mib'],
                        info['use_max_space']
                    ):
                        self.refresh_all_info()

    def _handle_mount(self, device_path):
        dialog = MountDialog(self, device_path)
        if dialog.exec() == QDialog.Accepted:
            info = dialog.get_mount_info()
            if info:
                if self.disk_ops.mount_partition(device_path, info['mount_point'], info['add_to_fstab']):
                    self.refresh_all_info()

    def _unmount_and_refresh(self, device_path):
        if self.disk_ops.unmount_partition(device_path, show_dialog_on_error=True):
            self.refresh_all_info()

    def _handle_delete_partition(self, device_path):
        if self.disk_ops.delete_partition(device_path):
            self.refresh_all_info()

    def _handle_format_partition(self, device_path):
        """
        调用 DiskOperations 的异步格式化方法。
        """
        # DiskOperations.format_partition 会处理用户确认和启动后台线程
        self.disk_ops.format_partition(device_path)
        # 界面刷新将在格式化完成后由 on_disk_formatting_finished 槽函数触发，所以这里不需要 refresh_all_info()

    # <--- 新增: 格式化完成后的槽函数
    def on_disk_formatting_finished(self, success, device_path, stdout, stderr):
        """
        接收 DiskOperations 发出的格式化完成信号，并刷新界面。
        """
        logger.info(f"格式化完成信号接收: 设备 {device_path}, 成功: {success}")
        # QMessageBox 已经在 DiskOperations 的 _on_formatting_finished 中处理
        self.refresh_all_info() # 刷新所有信息以显示更新后的文件系统类型等

    # --- RAID 管理 Tab ---
    def refresh_raid_info(self):
        self.ui.treeWidget_raid.clear()

        raid_headers = [
            "阵列设备", "级别", "状态", "大小", "活动设备", "失败设备", "备用设备",
            "总设备数", "UUID", "名称", "Chunk Size", "挂载点"
        ]
        self.ui.treeWidget_raid.setColumnCount(len(raid_headers))
        self.ui.treeWidget_raid.setHeaderLabels(raid_headers)

        for i in range(len(raid_headers)):
            self.ui.treeWidget_raid.header().setSectionResizeMode(i, QHeaderView.ResizeToContents)

        try:
            raid_arrays = self.system_manager.get_mdadm_arrays()
            if not raid_arrays:
                item = QTreeWidgetItem(self.ui.treeWidget_raid)
                item.setText(0, "未找到RAID阵列。")
                logger.info("未找到RAID阵列。")
                return

            for array in raid_arrays:
                array_item = QTreeWidgetItem(self.ui.treeWidget_raid)
                array_path = array.get('device', 'N/A')
                if not array_path or array_path == 'N/A':
                    logger.warning(f"RAID阵列 '{array.get('name', '未知')}' 的设备路径无效，跳过。")
                    continue

                current_mount_point = self.system_manager.get_mountpoint_for_device(array_path)

                array_item.setText(0, array_path)
                array_item.setText(1, array.get('level', 'N/A'))
                array_item.setText(2, array.get('state', 'N/A'))
                array_item.setText(3, array.get('array_size', 'N/A'))
                array_item.setText(4, array.get('active_devices', 'N/A'))
                array_item.setText(5, array.get('failed_devices', 'N/A'))
                array_item.setText(6, array.get('spare_devices', 'N/A'))
                array_item.setText(7, array.get('total_devices', 'N/A'))
                array_item.setText(8, array.get('uuid', 'N/A'))
                array_item.setText(9, array.get('name', 'N/A'))
                array_item.setText(10, array.get('chunk_size', 'N/A'))
                array_item.setText(11, current_mount_point if current_mount_point else "")
                array_item.setExpanded(True)
                array_data_for_context = array.copy()
                array_data_for_context['device'] = array_path
                array_item.setData(0, Qt.UserRole, array_data_for_context)

                for member in array.get('member_devices', []):
                    member_item = QTreeWidgetItem(array_item)
                    member_item.setText(0, f"  {member.get('device_path', 'N/A')}")
                    member_item.setText(1, f"成员: {member.get('raid_device', 'N/A')}")
                    member_item.setText(2, member.get('state', 'N/A'))
                    member_item.setText(3, f"Major: {member.get('major', 'N/A')}, Minor: {member.get('minor', 'N/A')}")

            for i in range(len(raid_headers)):
                self.ui.treeWidget_raid.resizeColumnToContents(i)
            logger.info("RAID阵列信息刷新成功。")

        except Exception as e:
            QMessageBox.critical(self, "错误", f"刷新RAID阵列信息失败: {e}")
            logger.error(f"刷新RAID阵列信息失败: {e}")

    def show_raid_context_menu(self, pos: QPoint):
        item = self.ui.treeWidget_raid.itemAt(pos)
        menu = QMenu(self)

        create_raid_action = menu.addAction("创建 RAID 阵列...")
        create_raid_action.triggered.connect(self._handle_create_raid_array)
        menu.addSeparator()

        if item and item.parent() is None:
            array_data = item.data(0, Qt.UserRole)
            if not array_data:
                logger.warning(f"无法获取 RAID 阵列 {item.text(0)} 的详细数据。")
                return

            array_path = array_data.get('device')
            member_devices = [m.get('device_path') for m in array_data.get('member_devices', [])]

            if not array_path or array_path == 'N/A':
                logger.warning(f"RAID阵列 '{array_data.get('name', '未知')}' 的设备路径无效，无法显示操作。")
                return

            current_mount_point = self.system_manager.get_mountpoint_for_device(array_path)

            if current_mount_point and current_mount_point != '[SWAP]' and current_mount_point != '':
                unmount_action = menu.addAction(f"卸载 {array_path} ({current_mount_point})")
                unmount_action.triggered.connect(lambda: self._unmount_and_refresh(array_path))
            else:
                mount_action = menu.addAction(f"挂载 {array_path}...")
                mount_action.triggered.connect(lambda: self._handle_mount(array_path))
            menu.addSeparator()

            stop_action = menu.addAction(f"停止阵列 {array_path}")
            stop_action.triggered.connect(lambda: self._handle_stop_raid_array(array_path))

            delete_action = menu.addAction(f"删除阵列 {array_path}")
            delete_action.triggered.connect(lambda: self._handle_delete_raid_array(array_path, member_devices))

            format_action = menu.addAction(f"格式化阵列 {array_path}...")
            format_action.triggered.connect(lambda: self._handle_format_raid_array(array_path))

        if menu.actions():
            menu.exec(self.ui.treeWidget_raid.mapToGlobal(pos))
        else:
            logger.info("右键点击了空白区域或没有可用的RAID操作。")

    def _handle_create_raid_array(self):
        available_devices = self.system_manager.get_unallocated_partitions()

        if not available_devices:
            QMessageBox.warning(self, "警告", "没有可用于创建 RAID 阵列的设备。请确保有未挂载、未被LVM或RAID使用的磁盘或分区。")
            return

        dialog = CreateRaidDialog(self, available_devices)
        if dialog.exec() == QDialog.Accepted:
            info = dialog.get_raid_info()
            if info:
                if self.raid_ops.create_raid_array(info['devices'], info['level'], info['chunk_size']):
                    self.refresh_all_info()

    def _handle_stop_raid_array(self, array_path):
        if self.raid_ops.stop_raid_array(array_path):
            self.refresh_all_info()

    def _handle_delete_raid_array(self, array_path, member_devices):
        if self.raid_ops.delete_raid_array(array_path, member_devices):
            self.refresh_all_info()

    def _handle_format_raid_array(self, array_path):
        """
        处理 RAID 阵列的格式化。
        """
        # 这将调用 DiskOperations 的异步格式化方法
        self.disk_ops.format_partition(array_path)
        # 刷新操作会在 on_disk_formatting_finished 中触发，所以这里不需要 refresh_all_info()

    # --- LVM 管理 Tab ---
    def refresh_lvm_info(self):
        self.ui.treeWidget_lvm.clear()

        lvm_headers = ["名称", "大小", "属性", "UUID", "关联", "空闲/已用", "路径/格式", "挂载点"]
        self.ui.treeWidget_lvm.setColumnCount(len(lvm_headers))
        self.ui.treeWidget_lvm.setHeaderLabels(lvm_headers)

        for i in range(len(lvm_headers)):
            self.ui.treeWidget_lvm.header().setSectionResizeMode(i, QHeaderView.ResizeToContents)

        try:
            lvm_data = self.system_manager.get_lvm_info()

            if not lvm_data.get('pvs') and not lvm_data.get('vgs') and not lvm_data.get('lvs'):
                item = QTreeWidgetItem(self.ui.treeWidget_lvm)
                item.setText(0, "未找到LVM信息。")
                logger.info("未找到LVM信息。")
                return

            # 物理卷 (PVs)
            pv_root_item = QTreeWidgetItem(self.ui.treeWidget_lvm)
            pv_root_item.setText(0, "物理卷 (PVs)")
            pv_root_item.setExpanded(True)
            pv_root_item.setData(0, Qt.UserRole, {'type': 'pv_root'})
            if lvm_data.get('pvs'):
                for pv in lvm_data['pvs']:
                    pv_item = QTreeWidgetItem(pv_root_item)
                    pv_name = pv.get('pv_name', 'N/A')
                    if pv_name.startswith('/dev/'):
                        pv_path = pv_name
                    else:
                        pv_path = f"/dev/{pv_name}" if pv_name != 'N/A' else 'N/A'

                    pv_item.setText(0, pv_name)
                    pv_item.setText(1, pv.get('pv_size', 'N/A'))
                    pv_item.setText(2, pv.get('pv_attr', 'N/A'))
                    pv_item.setText(3, pv.get('pv_uuid', 'N/A'))
                    pv_item.setText(4, f"VG: {pv.get('vg_name', 'N/A')}")
                    pv_item.setText(5, f"空闲: {pv.get('pv_free', 'N/A')}")
                    pv_item.setText(6, pv.get('pv_fmt', 'N/A'))
                    pv_item.setText(7, "")
                    pv_data_for_context = pv.copy()
                    pv_data_for_context['pv_name'] = pv_path
                    pv_item.setData(0, Qt.UserRole, {'type': 'pv', 'data': pv_data_for_context})
            else:
                item = QTreeWidgetItem(pv_root_item)
                item.setText(0, "未找到物理卷。")

            # 卷组 (VGs)
            vg_root_item = QTreeWidgetItem(self.ui.treeWidget_lvm)
            vg_root_item.setText(0, "卷组 (VGs)")
            vg_root_item.setExpanded(True)
            vg_root_item.setData(0, Qt.UserRole, {'type': 'vg_root'})
            if lvm_data.get('vgs'):
                for vg in lvm_data['vgs']:
                    vg_item = QTreeWidgetItem(vg_root_item)
                    vg_name = vg.get('vg_name', 'N/A')
                    vg_item.setText(0, vg_name)
                    vg_item.setText(1, vg.get('vg_size', 'N/A'))
                    vg_item.setText(2, vg.get('vg_attr', 'N/A'))
                    vg_item.setText(3, vg.get('vg_uuid', 'N/A'))
                    vg_item.setText(4, f"PVs: {vg.get('pv_count', 'N/A')}, LVs: {vg.get('lv_count', 'N/A')}")
                    vg_item.setText(5, f"空闲: {vg.get('vg_free', 'N/A')}, 已分配: {vg.get('vg_alloc_percent', 'N/A')}%")
                    vg_item.setText(6, vg.get('vg_fmt', 'N/A'))
                    vg_item.setText(7, "")
                    vg_data_for_context = vg.copy()
                    vg_data_for_context['vg_name'] = vg_name
                    vg_item.setData(0, Qt.UserRole, {'type': 'vg', 'data': vg_data_for_context})
            else:
                item = QTreeWidgetItem(vg_root_item)
                item.setText(0, "未找到卷组。")

            # 逻辑卷 (LVs)
            lv_root_item = QTreeWidgetItem(self.ui.treeWidget_lvm)
            lv_root_item.setText(0, "逻辑卷 (LVs)")
            lv_root_item.setExpanded(True)
            lv_root_item.setData(0, Qt.UserRole, {'type': 'lv_root'})
            if lvm_data.get('lvs'):
                for lv in lvm_data['lvs']:
                    lv_item = QTreeWidgetItem(lv_root_item)
                    lv_name = lv.get('lv_name', 'N/A')
                    vg_name = lv.get('vg_name', 'N/A')
                    lv_attr = lv.get('lv_attr', '')

                    lv_path = lv.get('lv_path')
                    if not lv_path or lv_path == 'N/A':
                        if vg_name != 'N/A' and lv_name != 'N/A':
                            lv_path = f"/dev/{vg_name}/{lv_name}"
                        else:
                            lv_path = 'N/A'

                    current_mount_point = self.system_manager.get_mountpoint_for_device(lv_path)

                    lv_item.setText(0, lv_name)
                    lv_item.setText(1, lv.get('lv_size', 'N/A'))
                    lv_item.setText(2, lv_attr)
                    lv_item.setText(3, lv.get('lv_uuid', 'N/A'))
                    lv_item.setText(4, f"VG: {vg_name}, Origin: {lv.get('origin', 'N/A')}")
                    lv_item.setText(5, f"快照: {lv.get('snap_percent', 'N/A')}%")
                    lv_item.setText(6, lv_path)
                    lv_item.setText(7, current_mount_point if current_mount_point else "")

                    lv_data_for_context = lv.copy()
                    lv_data_for_context['lv_path'] = lv_path
                    lv_data_for_context['lv_name'] = lv_name
                    lv_data_for_context['vg_name'] = vg_name
                    lv_data_for_context['lv_attr'] = lv_attr
                    lv_item.setData(0, Qt.UserRole, {'type': 'lv', 'data': lv_data_for_context})
            else:
                item = QTreeWidgetItem(lv_root_item)
                item.setText(0, "未找到逻辑卷。")

            for i in range(len(lvm_headers)):
                self.ui.treeWidget_lvm.resizeColumnToContents(i)
            logger.info("LVM信息刷新成功。")

        except Exception as e:
            QMessageBox.critical(self, "错误", f"刷新LVM信息失败: {e}")
            logger.error(f"刷新LVM信息失败: {e}")

    def show_lvm_context_menu(self, pos: QPoint):
        item = self.ui.treeWidget_lvm.itemAt(pos)
        menu = QMenu(self)

        create_menu = QMenu("创建...", self)
        create_pv_action = create_menu.addAction("创建物理卷 (PV)...")
        create_pv_action.triggered.connect(self._handle_create_pv)
        create_vg_action = create_menu.addAction("创建卷组 (VG)...")
        create_vg_action.triggered.connect(self._handle_create_vg)
        create_lv_action = create_menu.addAction("创建逻辑卷 (LV)...")
        create_lv_action.triggered.connect(self._handle_create_lv)
        menu.addMenu(create_menu)
        menu.addSeparator()

        if item:
            item_data = item.data(0, Qt.UserRole)
            if not item_data:
                logger.warning(f"无法获取 LVM 项 {item.text(0)} 的详细数据。")
                return

            item_type = item_data.get('type')
            data = item_data.get('data', {})

            if item_type == 'pv':
                pv_name = data.get('pv_name')
                if pv_name and pv_name != 'N/A':
                    delete_pv_action = menu.addAction(f"删除物理卷 {pv_name}")
                    delete_pv_action.triggered.connect(lambda: self._handle_delete_pv(pv_name))
            elif item_type == 'vg':
                vg_name = data.get('vg_name')
                if vg_name and vg_name != 'N/A':
                    delete_vg_action = menu.addAction(f"删除卷组 {vg_name}")
                    delete_vg_action.triggered.connect(lambda: self._handle_delete_vg(vg_name))
            elif item_type == 'lv':
                lv_name = data.get('lv_name')
                vg_name = data.get('vg_name')
                lv_attr = data.get('lv_attr', '')
                lv_path = data.get('lv_path')

                if lv_name and vg_name and lv_path and lv_path != 'N/A':
                    if 'a' in lv_attr:
                        deactivate_lv_action = menu.addAction(f"停用逻辑卷 {lv_name}")
                        deactivate_lv_action.triggered.connect(lambda: self._handle_deactivate_lv(lv_name, vg_name))
                    else:
                        activate_lv_action = menu.addAction(f"激活逻辑卷 {lv_name}")
                        activate_lv_action.triggered.connect(lambda: self._handle_activate_lv(lv_name, vg_name))

                    current_mount_point = self.system_manager.get_mountpoint_for_device(lv_path)
                    if current_mount_point and current_mount_point != '[SWAP]' and current_mount_point != '':
                        unmount_lv_action = menu.addAction(f"卸载 {lv_name} ({current_mount_point})")
                        unmount_lv_action.triggered.connect(lambda: self._unmount_and_refresh(lv_path))
                    else:
                        mount_lv_action = menu.addAction(f"挂载 {lv_name}...")
                        mount_lv_action.triggered.connect(lambda: self._handle_mount(lv_path))
                    menu.addSeparator()

                    delete_lv_action = menu.addAction(f"删除逻辑卷 {lv_name}")
                    delete_lv_action.triggered.connect(lambda: self._handle_delete_lv(lv_name, vg_name))

                    format_lv_action = menu.addAction(f"格式化逻辑卷 {lv_name}...")
                    format_lv_action.triggered.connect(lambda: self._handle_format_partition(lv_path))
                else:
                    logger.warning(f"逻辑卷 '{lv_name}' (VG: {vg_name}) 的路径无效，无法显示操作。Lv Path: {lv_path}")

        if menu.actions():
            menu.exec(self.ui.treeWidget_lvm.mapToGlobal(pos))
        else:
            logger.info("右键点击了空白区域或没有可用的LVM操作。")

    def _handle_create_pv(self):
        available_partitions = self.system_manager.get_unallocated_partitions()
        if not available_partitions:
            QMessageBox.warning(self, "警告", "没有可用于创建物理卷的未分配分区。")
            return

        dialog = CreatePvDialog(self, available_partitions)
        if dialog.exec() == QDialog.Accepted:
            info = dialog.get_pv_info()
            if info:
                if self.lvm_ops.create_pv(info['device_path']):
                    self.refresh_all_info()

    def _handle_delete_pv(self, device_path):
        if self.lvm_ops.delete_pv(device_path):
            self.refresh_all_info()

    def _handle_create_vg(self):
        lvm_info = self.system_manager.get_lvm_info()
        available_pvs = []
        for pv in lvm_info.get('pvs', []):
            pv_name = pv.get('pv_name')
            if pv_name and pv_name != 'N/A' and not pv.get('vg_name'):
                if pv_name.startswith('/dev/'):
                    available_pvs.append(pv_name)
                else:
                    available_pvs.append(f"/dev/{pv_name}")

        if not available_pvs:
            QMessageBox.warning(self, "警告", "没有可用于创建卷组的物理卷。请确保有未分配给任何卷组的物理卷。")
            return

        dialog = CreateVgDialog(self, available_pvs)
        if dialog.exec() == QDialog.Accepted:
            info = dialog.get_vg_info()
            if info:
                if self.lvm_ops.create_vg(info['vg_name'], info['pvs']):
                    self.refresh_all_info()

    def _handle_create_lv(self):
        lvm_info = self.system_manager.get_lvm_info()
        available_vgs = []
        vg_sizes = {}
        for vg in lvm_info.get('vgs', []):
            vg_name = vg.get('vg_name')
            if vg_name and vg_name != 'N/A':
                available_vgs.append(vg_name)

                # 将字符串转换为小写并去除可能存在的 '<' 符号，以便更准确地匹配
                free_size_str = vg.get('vg_free', '0B').strip().lower()
                current_vg_size_gb = 0.0

                # 修正正则表达式：
                # 1. 允许可选的 '<' 符号在数字前
                # 2. 确保单位匹配正确，如果单位缺失，默认按 GB 处理 (LVM 的 vg_free 常常默认 GB)
                match = re.match(r'<?(\d+\.?\d*)\s*([gmktb])?', free_size_str)
                if match:
                    value = float(match.group(1))
                    unit = match.group(2) # unit will be 'g', 'm', 't', 'k', 'b' or None

                    if unit == 'k':
                        current_vg_size_gb = value / (1024 * 1024) # KB to GB
                    elif unit == 'm':
                        current_vg_size_gb = value / 1024 # MB to GB
                    elif unit == 'g' or unit is None: # 如果单位是 'g' 或没有指定单位，则认为是 GB
                        current_vg_size_gb = value
                    elif unit == 't':
                        current_vg_size_gb = value * 1024 # TB to GB
                    elif unit == 'b': # Bytes to GB
                        current_vg_size_gb = value / (1024 * 1024 * 1024)
                    else:
                        logger.warning(f"未知LVM单位: '{unit}' for '{free_size_str}'")
                else:
                    logger.warning(f"无法解析LVM空闲大小字符串: '{free_size_str}'")

                vg_sizes[vg_name] = current_vg_size_gb

        if not available_vgs:
            QMessageBox.warning(self, "警告", "没有可用于创建逻辑卷的卷组。")
            return

        dialog = CreateLvDialog(self, available_vgs, vg_sizes)
        if dialog.exec() == QDialog.Accepted:
            info = dialog.get_lv_info()
            if info:
                if self.lvm_ops.create_lv(info['lv_name'], info['vg_name'], info['size_gb'], info['use_max_space']):
                    self.refresh_all_info()

    def _handle_delete_lv(self, lv_name, vg_name):
        lv_path = f"/dev/{vg_name}/{lv_name}"
        self.disk_ops.unmount_partition(lv_path, show_dialog_on_error=False)
        self.disk_ops._remove_fstab_entry(lv_path)

        if self.lvm_ops.delete_lv(lv_name, vg_name):
            self.refresh_all_info()

    def _handle_activate_lv(self, lv_name, vg_name):
        if self.lvm_ops.activate_lv(lv_name, vg_name):
            self.refresh_all_info()

    def _handle_deactivate_lv(self, lv_name, vg_name):
        if self.lvm_ops.deactivate_lv(lv_name, vg_name):
            self.refresh_all_info()

    def _handle_delete_vg(self, vg_name):
        """
        处理删除卷组 (VG) 的操作。
        """
        logger.info(f"尝试删除卷组 (VG) {vg_name}。")
        reply = QMessageBox.question(
            self,
            "确认删除卷组",
            f"您确定要删除卷组 {vg_name} 吗？此操作将永久删除该卷组及其所有逻辑卷和数据！",
            QMessageBox.Yes | QMessageBox.No,
            QMessageBox.No
        )
        if reply == QMessageBox.No:
            logger.info(f"用户取消了删除卷组 {vg_name} 的操作。")
            return

        lvm_info = self.system_manager.get_lvm_info()
        vg_info = next((vg for vg in lvm_info.get('vgs', []) if vg.get('vg_name') == vg_name), None)

        lv_count_raw = vg_info.get('lv_count', 0) if vg_info else 0
        try:
            lv_count = int(float(lv_count_raw))
        except (ValueError, TypeError):
            lv_count = 0

        if lv_count > 0:
            QMessageBox.critical(self, "删除失败", f"卷组 {vg_name} 中仍包含逻辑卷。请先删除所有逻辑卷。")
            logger.error(f"尝试删除包含逻辑卷的卷组 {vg_name}。操作被阻止。")
            return

        success = self.lvm_ops.delete_vg(vg_name)
        if success:
            self.refresh_all_info()
        else:
            QMessageBox.critical(self, "删除卷组失败", f"删除卷组 {vg_name} 失败，请检查日志。")


if __name__ == "__main__":
    app = QApplication(sys.argv)
    widget = MainWindow()
    widget.show()
    sys.exit(app.exec())