#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
主题管理器 - 负责检测系统主题并管理应用主题切换
"""

from PyQt5.QtWidgets import QApplication
from PyQt5.QtGui import QPalette, QColor
from PyQt5.QtCore import QObject, pyqtSignal
import platform
import subprocess
import os


class ThemeManager(QObject):
    """主题管理器类"""
    
    # 主题切换信号
    theme_changed = pyqtSignal(bool)  # True表示深色模式，False表示浅色模式
    
    def __init__(self):
        super().__init__()
        self._is_dark_theme = False
        self._auto_detect = True
        self._detection_timer = None
        
    def is_dark_theme(self):
        """检测是否为深色主题"""
        if self._auto_detect:
            return self._detect_system_theme()
        return self._is_dark_theme
    
    def _detect_system_theme(self):
        """检测系统主题"""
        try:
            # macOS系统主题检测
            if platform.system() == 'Darwin':
                return self._detect_macos_theme()
            # Windows系统主题检测  
            elif platform.system() == 'Windows':
                return self._detect_windows_theme()
            # Linux系统主题检测
            else:
                return self._detect_linux_theme()
        except Exception as e:
            print(f"主题检测失败: {e}")
            return False
    
    def _detect_macos_theme(self):
        """检测macOS系统主题"""
        try:
            # 使用osascript命令检测macOS主题
            result = subprocess.run([
                'osascript', '-e',
                'tell application "System Events" to tell appearance preferences to return dark mode'
            ], capture_output=True, text=True, timeout=5)
            
            if result.returncode == 0:
                return 'true' in result.stdout.lower()
            
            # 备用方法：检测系统设置
            result = subprocess.run([
                'defaults', 'read', '-g', 'AppleInterfaceStyle'
            ], capture_output=True, text=True, timeout=5)
            
            if result.returncode == 0:
                return 'dark' in result.stdout.lower()
                
        except (subprocess.TimeoutExpired, subprocess.SubprocessError, FileNotFoundError):
            pass
        
        # 使用Qt的调色板检测作为备用方法
        return self._detect_by_palette()
    
    def _detect_windows_theme(self):
        """检测Windows系统主题"""
        try:
            # Windows 10/11 注册表检测
            import winreg
            
            key_path = r'SOFTWARE\Microsoft\Windows\CurrentVersion\Themes\Personalize'
            value_name = 'AppsUseLightTheme'
            
            try:
                with winreg.OpenKey(winreg.HKEY_CURRENT_USER, key_path) as key:
                    value, _ = winreg.QueryValueEx(key, value_name)
                    return value == 0  # 0表示深色模式
            except (OSError, FileNotFoundError):
                pass
                
        except ImportError:
            pass
        
        # 使用Qt的调色板检测作为备用方法
        return self._detect_by_palette()
    
    def _detect_linux_theme(self):
        """检测Linux系统主题"""
        try:
            # 检测GTK主题
            result = subprocess.run([
                'gsettings', 'get', 'org.gnome.desktop.interface', 'gtk-theme'
            ], capture_output=True, text=True, timeout=5)
            
            if result.returncode == 0:
                theme_name = result.stdout.strip().strip("'")
                return any(dark_name in theme_name.lower() for dark_name in ['dark', 'night'])
            
            # 检测颜色方案
            result = subprocess.run([
                'gsettings', 'get', 'org.gnome.desktop.interface', 'color-scheme'
            ], capture_output=True, text=True, timeout=5)
            
            if result.returncode == 0:
                return 'dark' in result.stdout.lower()
                
        except (subprocess.TimeoutExpired, subprocess.SubprocessError, FileNotFoundError):
            pass
        
        # 使用Qt的调色板检测作为备用方法
        return self._detect_by_palette()
    
    def _detect_by_palette(self):
        """使用Qt调色板检测主题"""
        app = QApplication.instance()
        if app is None:
            return False
        
        palette = app.palette()
        
        # 检测背景色和文本色的亮度
        window_color = palette.color(QPalette.Window)
        text_color = palette.color(QPalette.WindowText)
        
        # 计算亮度
        def get_luminance(color):
            return (0.299 * color.red() + 0.587 * color.green() + 0.114 * color.blue()) / 255
        
        window_luminance = get_luminance(window_color)
        text_luminance = get_luminance(text_color)
        
        # 如果背景比文本暗，则为深色主题
        return window_luminance < text_luminance
    
    def get_theme_stylesheet(self, is_dark=None):
        """获取主题样式表"""
        if is_dark is None:
            is_dark = self.is_dark_theme()
        
        if is_dark:
            return self._get_dark_stylesheet()
        else:
            return self._get_light_stylesheet()
    
    def _get_dark_stylesheet(self):
        """深色主题样式表 - Apple设计风格"""
        return """
        /* Apple设计风格深色主题样式 */
        
        /* 全局文字颜色和字体 - 使用Apple系统字体 */
        QWidget {
            color: #f0f0f0;
            font-family: '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Helvetica Neue', 'Helvetica', 'Arial', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', sans-serif;
            font-size: 13px;
        }
        
        /* 主窗口 - Apple深色背景 */
        QMainWindow {
            background-color: #2c2c2e;
        }
        
        /* 菜单栏 - Apple深色风格 */
        QMenuBar {
            background-color: #2c2c2e;
            border: none;
            border-bottom: 1px solid #404040;
            font-size: 13px;
            color: #f0f0f0;
            padding: 4px 0;
        }
        
        QMenuBar::item {
            background-color: transparent;
            padding: 6px 12px;
            color: #f0f0f0;
            border-radius: 4px;
            margin: 0 1px;
        }
        
        QMenuBar::item:selected {
            background-color: #404040;
            color: #f0f0f0;
        }
        
        QMenuBar::item:pressed {
            background-color: #505050;
            color: #f0f0f0;
        }
        
        /* 菜单 - Apple深色风格 */
        QMenu {
            background-color: #2c2c2e;
            border: 1px solid #404040;
            border-radius: 8px;
            font-size: 13px;
            color: #f0f0f0;
            padding: 4px 0;
            margin: 2px;
        }
        
        QMenu::item {
            color: #f0f0f0;
            background-color: transparent;
            border-radius: 4px;
            margin: 0 4px;
            padding: 4px 20px;
        }
        
        QMenu::item:selected {
            background-color: #0a84ff;
            color: #ffffff;
        }
        
        QMenu::item:pressed {
            background-color: #0066cc;
            color: #ffffff;
        }
        
        QMenu::separator {
            height: 1px;
            background-color: #404040;
            margin: 4px 8px;
        }
        
        /* 功能区 */
        QFrame {
            background-color: #2c2c2e;
            border: none;
        }
        
        /* 组框 */
        QGroupBox {
            font-size: 12px;
            font-weight: normal;
            color: #f0f0f0;
            background-color: #2c2c2e;
            border: none;
            border-radius: 8px;
            margin-top: 5px;
            padding-top: 5px;
        }
        
        QGroupBox::title {
            subcontrol-origin: margin;
            left: 10px;
            padding: 0 5px 0 5px;
            color: #a0a0a0;
        }
        
        /* 工具按钮 - Apple深色风格 */
        QToolButton {
            border: 1px solid transparent;
            border-radius: 6px;
            background-color: #3a3a3c;
            font-size: 13px;
            color: #f0f0f0;
            padding: 6px 12px;
        }
        
        QToolButton:hover {
            background-color: #4a4a4c;
            border: 1px solid #5a5a5c;
        }
        
        QToolButton:pressed {
            background-color: #5a5a5c;
            border: 1px solid #6a6a6c;
        }
        
        QToolButton:checked {
            background-color: #0a84ff;
            border: 1px solid #0a84ff;
            color: #ffffff;
        }
        
        /* 切换按钮 */
        QToolButton[checkable="true"] {
            border: 1px solid #4a4a4c;
            border-radius: 6px;
            background-color: #3a3a3c;
            font-size: 12px;
            color: #f0f0f0;
            padding: 6px 12px;
        }
        
        QToolButton[checkable="true"]:hover {
            background-color: #4a4a4c;
        }
        
        QToolButton[checkable="true"]:checked {
            background-color: #0a84ff;
            border: 1px solid #0a84ff;
            color: #ffffff;
        }
        
        /* 下拉框 - Apple深色风格 */
        QComboBox {
            background-color: #3a3a3c;
            border: 1px solid #4a4a4c;
            border-radius: 6px;
            color: #f0f0f0;
            padding: 4px 8px;
            selection-background-color: #0a84ff;
            selection-color: #ffffff;
        }
        
        QComboBox:hover {
            background-color: #4a4a4c;
            border: 1px solid #5a5a5c;
        }
        
        QComboBox::drop-down {
            border: none;
            width: 20px;
            border-left: 1px solid #4a4a4c;
            border-top-right-radius: 6px;
            border-bottom-right-radius: 6px;
        }
        
        QComboBox::down-arrow {
            image: none;
            border-left: 4px solid transparent;
            border-right: 4px solid transparent;
            border-top: 6px solid #a0a0a0;
            margin: 6px;
        }
        
        QComboBox QAbstractItemView {
            background-color: #2c2c2e;
            border: 1px solid #4a4a4c;
            color: #f0f0f0;
            selection-background-color: #0a84ff;
            selection-color: #ffffff;
        }
        
        /* 文本编辑区域 - Apple深色风格 */
        QTextEdit {
            background-color: #1c1c1e;
            border: none;
            font-family: '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Helvetica Neue', 'Helvetica', 'Arial', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', sans-serif;
            font-size: 15px;
            color: #f0f0f0;
            padding: 32px;
            line-height: 1.5;
            selection-background-color: #0066cc;
            selection-color: #ffffff;
        }
        
        /* 状态栏 - Apple深色风格 */
        QStatusBar {
            background-color: #3a3a3c;
            border-top: 1px solid #4a4a4c;
            font-size: 12px;
            color: #a0a0a0;
            font-family: '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Helvetica Neue', 'Helvetica', 'Arial', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', sans-serif;
            padding: 6px 12px;
        }
        
        /* 标签 */
        QLabel {
            color: #f0f0f0;
            background-color: transparent;
        }
        
        /* 消息框 - Apple深色风格 */
        QMessageBox {
            background-color: #2c2c2e;
            color: #f0f0f0;
            border-radius: 12px;
        }
        
        QMessageBox QPushButton {
            background-color: #3a3a3c;
            color: #f0f0f0;
            border: 1px solid #4a4a4c;
            border-radius: 6px;
            padding: 6px 16px;
            min-width: 80px;
        }
        
        QMessageBox QPushButton:hover {
            background-color: #4a4a4c;
            border: 1px solid #5a5a5c;
        }
        
        QMessageBox QPushButton:pressed {
            background-color: #5a5a5c;
            border: 1px solid #6a6a6c;
        }
        
        QMessageBox QPushButton:default {
            background-color: #0a84ff;
            color: #ffffff;
            border: 1px solid #0a84ff;
        }
        
        QMessageBox QPushButton:default:hover {
            background-color: #0066cc;
            border: 1px solid #0066cc;
        }
        
        QMessageBox QPushButton:default:pressed {
            background-color: #004d99;
            border: 1px solid #004d99;
        }
        
        /* 滚动条 - Apple深色风格 */
        QScrollBar:vertical {
            background-color: transparent;
            width: 8px;
            border: none;
        }
        
        QScrollBar::handle:vertical {
            background-color: #5a5a5c;
            border-radius: 4px;
            min-height: 20px;
        }
        
        QScrollBar::handle:vertical:hover {
            background-color: #6a6a6c;
        }
        
        QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical {
            border: none;
            background: none;
        }
        
        /* 按钮 - Apple深色风格 */
        QPushButton {
            background-color: #3a3a3c;
            color: #f0f0f0;
            border: 1px solid #4a4a4c;
            border-radius: 6px;
            padding: 6px 16px;
            font-size: 13px;
        }
        
        QPushButton:hover {
            background-color: #4a4a4c;
            border: 1px solid #5a5a5c;
        }
        
        QPushButton:pressed {
            background-color: #5a5a5c;
            border: 1px solid #6a6a6c;
        }
        
        QPushButton:default {
            background-color: #0a84ff;
            color: #ffffff;
            border: 1px solid #0a84ff;
        }
        
        QPushButton:default:hover {
            background-color: #0066cc;
            border: 1px solid #0066cc;
        }
        
        QPushButton:default:pressed {
            background-color: #004d99;
            border: 1px solid #004d99;
        }
        """
    
    def _get_light_stylesheet(self):
        """浅色主题样式表 - Apple设计风格"""
        return """
        /* Apple设计风格浅色主题样式 */
        
        /* 全局文字颜色和字体 - 使用Apple系统字体 */
        QWidget {
            color: #333333;
            font-family: '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Helvetica Neue', 'Helvetica', 'Arial', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', sans-serif;
            font-size: 13px;
        }
        
        /* 主窗口 - 纯净白色背景 */
        QMainWindow {
            background-color: #ffffff;
        }
        
        /* 菜单栏 - Apple风格 */
        QMenuBar {
            background-color: #ffffff;
            border: none;
            border-bottom: 1px solid #e0e0e0;
            font-size: 13px;
            color: #333333;
            padding: 4px 0;
        }
        
        QMenuBar::item {
            background-color: transparent;
            padding: 6px 12px;
            color: #333333;
            border-radius: 4px;
            margin: 0 1px;
        }
        
        QMenuBar::item:selected {
            background-color: #f0f0f0;
            color: #333333;
        }
        
        QMenuBar::item:pressed {
            background-color: #e0e0e0;
            color: #333333;
        }
        
        /* 菜单 - Apple风格 */
        QMenu {
            background-color: #ffffff;
            border: 1px solid #d0d0d0;
            border-radius: 8px;
            font-size: 13px;
            color: #333333;
            padding: 4px 0;
            margin: 2px;
        }
        
        QMenu::item {
            color: #333333;
            background-color: transparent;
            border-radius: 4px;
            margin: 0 4px;
            padding: 4px 20px;
        }
        
        QMenu::item:selected {
            background-color: #007aff;
            color: #ffffff;
        }
        
        QMenu::item:pressed {
            background-color: #0062cc;
            color: #ffffff;
        }
        
        QMenu::separator {
            height: 1px;
            background-color: #e0e0e0;
            margin: 4px 8px;
        }
        
        /* 功能区 */
        QFrame {
            background-color: #ffffff;
            border: none;
        }
        
        /* 组框 */
        QGroupBox {
            font-size: 12px;
            font-weight: normal;
            color: #333333;
            background-color: #ffffff;
            border: none;
            border-radius: 8px;
            margin-top: 5px;
            padding-top: 5px;
        }
        
        QGroupBox::title {
            subcontrol-origin: margin;
            left: 10px;
            padding: 0 5px 0 5px;
            color: #666666;
        }
        
        /* 工具按钮 - Apple风格 */
        QToolButton {
            border: 1px solid transparent;
            border-radius: 6px;
            background-color: #f6f6f6;
            font-size: 13px;
            color: #333333;
            padding: 6px 12px;
        }
        
        QToolButton:hover {
            background-color: #e0e0e0;
            border: 1px solid #d0d0d0;
        }
        
        QToolButton:pressed {
            background-color: #d0d0d0;
            border: 1px solid #c0c0c0;
        }
        
        QToolButton:checked {
            background-color: #007aff;
            border: 1px solid #007aff;
            color: #ffffff;
        }
        
        /* 切换按钮 */
        QToolButton[checkable="true"] {
            border: 1px solid #d0d0d0;
            border-radius: 6px;
            background-color: #f6f6f6;
            font-size: 12px;
            color: #333333;
            padding: 6px 12px;
        }
        
        QToolButton[checkable="true"]:hover {
            background-color: #e0e0e0;
        }
        
        QToolButton[checkable="true"]:checked {
            background-color: #007aff;
            border: 1px solid #007aff;
            color: #ffffff;
        }
        
        /* 下拉框 - Apple风格 */
        QComboBox {
            background-color: #f6f6f6;
            border: 1px solid #d0d0d0;
            border-radius: 6px;
            color: #333333;
            padding: 4px 8px;
            selection-background-color: #007aff;
            selection-color: #ffffff;
        }
        
        QComboBox:hover {
            background-color: #e0e0e0;
            border: 1px solid #c0c0c0;
        }
        
        QComboBox::drop-down {
            border: none;
            width: 20px;
            border-left: 1px solid #d0d0d0;
            border-top-right-radius: 6px;
            border-bottom-right-radius: 6px;
        }
        
        QComboBox::down-arrow {
            image: none;
            border-left: 4px solid transparent;
            border-right: 4px solid transparent;
            border-top: 6px solid #666666;
            margin: 6px;
        }
        
        QComboBox QAbstractItemView {
            border: 1px solid #d0d0d0;
            color: #333333;
            background-color: #ffffff;
            selection-background-color: #007aff;
            selection-color: #ffffff;
        }
        
        /* 文本编辑区域 - Apple风格 */
        QTextEdit {
            background-color: #ffffff;
            border: none;
            font-family: '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Helvetica Neue', 'Helvetica', 'Arial', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', sans-serif;
            font-size: 15px;
            color: #333333;
            padding: 32px;
            line-height: 1.5;
            selection-background-color: #b3d9ff;
            selection-color: #333333;
        }
        
        /* 状态栏 - Apple风格 */
        QStatusBar {
            background-color: #f6f6f6;
            border-top: 1px solid #e0e0e0;
            font-size: 12px;
            color: #666666;
            font-family: '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Helvetica Neue', 'Helvetica', 'Arial', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', sans-serif;
            padding: 6px 12px;
        }
        
        /* 标签 */
        QLabel {
            color: #333333;
            background-color: transparent;
        }
        
        /* 消息框 - Apple风格 */
        QMessageBox {
            background-color: #ffffff;
            color: #333333;
            border-radius: 12px;
        }
        
        QMessageBox QPushButton {
            background-color: #f6f6f6;
            color: #333333;
            border: 1px solid #d0d0d0;
            border-radius: 6px;
            padding: 6px 16px;
            min-width: 80px;
        }
        
        QMessageBox QPushButton:hover {
            background-color: #e0e0e0;
            border: 1px solid #c0c0c0;
        }
        
        QMessageBox QPushButton:pressed {
            background-color: #d0d0d0;
            border: 1px solid #a0a0a0;
        }
        
        QMessageBox QPushButton:default {
            background-color: #007aff;
            color: #ffffff;
            border: 1px solid #007aff;
        }
        
        QMessageBox QPushButton:default:hover {
            background-color: #0062cc;
            border: 1px solid #0062cc;
        }
        
        QMessageBox QPushButton:default:pressed {
            background-color: #004a99;
            border: 1px solid #004a99;
        }
        
        /* 滚动条 - Apple风格 */
        QScrollBar:vertical {
            background-color: transparent;
            width: 8px;
            border: none;
        }
        
        QScrollBar::handle:vertical {
            background-color: #c0c0c0;
            border-radius: 4px;
            min-height: 20px;
        }
        
        QScrollBar::handle:vertical:hover {
            background-color: #a0a0a0;
        }
        
        QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical {
            border: none;
            background: none;
        }
        
        /* 按钮 - Apple风格 */
        QPushButton {
            background-color: #f6f6f6;
            color: #333333;
            border: 1px solid #d0d0d0;
            border-radius: 6px;
            padding: 6px 16px;
            font-size: 13px;
        }
        
        QPushButton:hover {
            background-color: #e0e0e0;
            border: 1px solid #c0c0c0;
        }
        
        QPushButton:pressed {
            background-color: #d0d0d0;
            border: 1px solid #a0a0a0;
        }
        
        QPushButton:default {
            background-color: #007aff;
            color: #ffffff;
            border: 1px solid #007aff;
        }
        
        QPushButton:default:hover {
            background-color: #0062cc;
            border: 1px solid #0062cc;
        }
        
        QPushButton:default:pressed {
            background-color: #004a99;
            border: 1px solid #004a99;
        }
        """
    
    def set_dark_theme(self, is_dark):
        """设置深色主题"""
        self._is_dark_theme = is_dark
        self._auto_detect = False
        self.theme_changed.emit(is_dark)
    
    def enable_auto_detection(self, enabled=True):
        """启用/禁用自动主题检测"""
        self._auto_detect = enabled
        if enabled:
            self.theme_changed.emit(self.is_dark_theme())
    
    def get_current_theme_colors(self):
        """获取当前主题颜色配置"""
        is_dark = self.is_dark_theme()
        
        if is_dark:
            return {
                'background': '#1e1e1e',
                'surface': '#2d2d2d',
                'surface_hover': '#3c3c3c',
                'text': '#e0e0e0',
                'text_secondary': '#b0b0b0',
                'border': '#3c3c3c',
                'accent': '#0078d4',
                'accent_hover': '#106ebe'
            }
        else:
            return {
                'background': '#f3f2f1',
                'surface': '#ffffff',
                'surface_hover': '#f0f0f0',
                'text': '#333333',
                'text_secondary': '#666666',
                'border': '#d0d0d0',
                'accent': '#0078d7',
                'accent_hover': '#005a9e'
            }


# 全局主题管理器实例
theme_manager = ThemeManager()