#!/www/server/panel/pyenv/bin/python
#coding: utf-8
# +-------------------------------------------------------------------
# | 宝塔Linux面板
# +-------------------------------------------------------------------
# | Copyright (c) 2015-2099 宝塔软件(http://bt.cn) All rights reserved.
# +-------------------------------------------------------------------
# | Author: hwliang <hwl@bt.cn>
# +-------------------------------------------------------------------

import os
import sys
import ssl
import time
import logging
import threading
import pyinotify
import socket
import re
from gevent import monkey
from gevent.pywsgi import WSGIServer
from gevent.pool import Pool
from concurrent.futures import ThreadPoolExecutor

# 尽早打猴子补丁，确保所有I/O操作被协程化
monkey.patch_all(socket=True, select=True)

# 常量定义
_PATH = '/www/server/panel'
PID_FILE = f"{_PATH}/logs/panel.pid"
TASK_PID_FILE = f"{_PATH}/logs/task.pid"
UPGRADE_FLASK_TIME_FILE = f"{_PATH}/upgrade_flask_time.pl"
ERROR_LOG = f"{_PATH}/logs/error.log"
PORT_FILE = f"{_PATH}/data/port.pl"
IPV6_FLAG = f"{_PATH}/data/ipv6.pl"
SSL_FLAG = f"{_PATH}/data/ssl.pl"
SSL_KEY = f"{_PATH}/ssl/privateKey.pem"
SSL_CERT = f"{_PATH}/ssl/certificate.pem"
SSL_ERROR_FLAG = f"{_PATH}/data/panel_ssl_error.pl"
SSL_VERIFY_FLAG = f"{_PATH}/data/ssl_verify_data.pl"
SSL_CRL = f"{_PATH}/ssl/crl.pem"
SSL_CA = f"{_PATH}/ssl/ca.pem"
UPGRADE_FILE = f"{_PATH}/script/upgrade_flask.sh"

# 性能优化参数
MAX_WORKERS = 1000          # 最大协程数
MAX_THREAD_WORKERS = 10     # 线程池大小(用于CPU密集型任务)
TCP_BUFFER_SIZE = 1024*1024 # TCP缓冲区大小

# 设置工作目录和导入路径
os.chdir(_PATH)
if 'class/' not in sys.path:
    sys.path.insert(0, 'class/')

# 导入面板模块
from BTPanel import app, public

# 检查调试模式
is_debug = os.path.exists('data/debug.pl')

# 创建协程池和线程池
greenlet_pool = Pool(MAX_WORKERS)
thread_pool = ThreadPoolExecutor(max_workers=MAX_THREAD_WORKERS)

# 配置日志
logging.basicConfig(
    level=logging.DEBUG if is_debug else logging.WARNING,
    format="[%(asctime)s][%(levelname)s] - %(message)s"
)
logger = logging.getLogger(app.name)

def setup_logging():
    """设置日志配置"""
    if is_debug:
        logger.setLevel(logging.DEBUG)
    else:
        logger.setLevel(logging.WARNING)
    
    # 将Flask应用日志与主日志集成
    app.logger.handlers = logger.handlers
    app.logger.setLevel(logger.level)

def check_plugin_loader():
    """检查并加载适当的插件加载器"""
    try:
        machine = os.uname().machine
    except Exception as e:
        logger.error(f"获取系统架构失败: {e}")
        machine = 'x86_64'
    
    plugin_loader_file = 'class/PluginLoader.so'
    plugin_loader_src_file = f"class/PluginLoader.{machine}.Python3.7.so"
    
    # 特殊处理x86_64架构的glibc版本
    if machine == 'x86_64':
        glibc_version = public.get_glibc_version()
        if glibc_version in ['2.14', '2.13', '2.12', '2.11', '2.10']:
            plugin_loader_src_file = f"class/PluginLoader.{machine}.glibc214.Python3.7.so"
    
    if os.path.exists(plugin_loader_src_file):
        try:
            os.system(f"\cp -f {plugin_loader_src_file} {plugin_loader_file}")
            logger.info(f"已加载插件加载器: {plugin_loader_src_file}")
        except Exception as e:
            logger.error(f"加载插件加载器失败: {e}")

def start_background_task():
    """启动后台任务"""
    try:
        public.ExecShell(f"chmod 700 {_PATH}/BT-Task")
        public.ExecShell(f"{_PATH}/BT-Task")
        logger.info("后台任务已启动")
    except Exception as e:
        logger.error(f"启动后台任务失败: {e}")

def monitor_task():
    """监控后台任务状态，必要时重启"""
    cycle = 60
    while True:
        try:
            time.sleep(cycle)
            
            # 检查pid文件
            if not os.path.exists(TASK_PID_FILE):
                logger.warning("任务PID文件不存在，重启任务")
                start_background_task()
                continue
            
            # 读取pid
            task_pid = public.readFile(TASK_PID_FILE).strip()
            if not task_pid:
                logger.warning("任务PID为空，重启任务")
                start_background_task()
                continue
            
            # 检查进程是否存在
            comm_file = f"/proc/{task_pid}/comm"
            if not os.path.exists(comm_file):
                logger.warning(f"任务进程 {task_pid} 不存在，重启任务")
                start_background_task()
                continue
            
            # 检查是否为面板任务进程
            comm = public.readFile(comm_file).strip()
            if 'BT-Task' not in comm:
                logger.warning(f"进程 {task_pid} 不是面板任务，重启任务")
                start_background_task()
                
        except Exception as e:
            logger.error(f"监控任务时发生错误: {e}")

def setup_ssl_context():
    """配置SSL上下文"""
    if not (os.path.exists(SSL_FLAG) and os.path.exists(SSL_KEY) and os.path.exists(SSL_CERT)):
        return None
    
    # 检查证书文件大小
    if os.path.getsize(SSL_KEY) < 10 or os.path.getsize(SSL_CERT) < 10:
        logger.warning("SSL证书文件大小异常，禁用SSL")
        try:
            os.remove(SSL_KEY)
            os.remove(SSL_CERT)
            os.remove(SSL_FLAG)
            public.writeFile(SSL_ERROR_FLAG, 'True')
        except Exception as e:
            logger.error(f"清理SSL文件失败: {e}")
        return None
    
    try:
        ssl_context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
        ssl_context.load_cert_chain(certfile=SSL_CERT, keyfile=SSL_KEY)
        
        # 设置最低TLS版本
        if hasattr(ssl_context, "minimum_version"):
            ssl_context.minimum_version = ssl.TLSVersion.TLSv1_2
        else:
            ssl_context.options |= (ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 | ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1)
        
        # 设置加密套件
        ssl_context.set_ciphers("ECDHE-RSA-AES128-GCM-SHA256:HIGH:!aNULL:!MD5:!RC4:!DHE")
        
        # 证书验证配置
        if os.path.exists(SSL_VERIFY_FLAG):
            if os.path.exists(SSL_CA):
                ssl_context.load_verify_locations(SSL_CA)
                ssl_context.verify_mode = ssl.CERT_REQUIRED
                ssl_context.set_default_verify_paths()
                logger.info("启用SSL证书验证")
            else:
                logger.warning("SSL验证数据存在但CA证书不存在")
        
        logger.info("SSL上下文配置完成")
        return ssl_context
    except Exception as e:
        logger.error(f"配置SSL上下文失败: {e}")
        return None

def check_upgrade():
    """检查并执行面板升级"""
    try:
        need_upgrade = True
        # 检查是否需要升级
        last_upgrade_time = 0 if not os.path.exists(UPGRADE_FLASK_TIME_FILE) else os.path.getmtime(UPGRADE_FLASK_TIME_FILE)
        if time.time() - last_upgrade_time < 86400:  # 24小时内不重复升级
            logger.info("未到升级时间，跳过升级检查")
            need_upgrade = False

        for path_dir in sys.path:
            if not path_dir.endswith("site-packages"):
                continue
            file = os.path.join(path_dir, "flask", "__init__.py")
            if os.path.exists(file):
                with open(file, "rt") as f:
                    data = f.read()
                if re.search("__version__\s*=\s*\"1\.\d+", data):
                    need_upgrade = True

        if not need_upgrade:
            return

        # 检查升级时间文件
        if not os.path.exists(UPGRADE_FLASK_TIME_FILE):
            with open(UPGRADE_FLASK_TIME_FILE, 'w') as f:
                f.write(str(time.time()))
            logger.info("创建升级时间文件")
        
        # 执行升级脚本
        if os.path.exists(UPGRADE_FILE):
            logger.info("开始执行面板升级...")
            os.system(f"nohup bash {UPGRADE_FILE} &>/dev/null &")
            with open(UPGRADE_FLASK_TIME_FILE, 'w') as f:
                f.write(str(time.time()))
            logger.info("面板升级已启动")
    except Exception as e:
        logger.error(f"检查升级时发生错误: {e}")

def cleanup():
    """清理临时文件和旧文件"""
    try:
        # 清理临时文件
        public.clear_tmp_file()
        logger.info("临时文件清理完成")
        
        # 移除旧的flask目录
        if os.path.exists('class/flask'):
            os.system('rm -rf class/flask')
            logger.info("移除旧的Flask目录")
    except Exception as e:
        logger.error(f"清理过程中发生错误: {e}")

def init_database():
    """初始化数据库（如果需要）"""
    if not os.path.exists(f"{_PATH}/data/db"):
        try:
            logger.info("初始化数据库...")
            os.system(f"nohup {public.get_python_bin()} {_PATH}/script/init_db.py &>/dev/null &")
        except Exception as e:
            logger.error(f"初始化数据库失败: {e}")

class PanelEventHandler(pyinotify.ProcessEvent):
    """面板文件变更事件处理器"""
    _exts = ['py', 'html', 'BT-Panel', 'so']
    _exclude_patterns = [
        re.compile(f'{_PATH}/plugin/.+'),
        re.compile(f'{_PATH}/(tmp|temp|install)/.+'),
        re.compile(f'{_PATH}/pyenv/.+'),
        re.compile(f'{_PATH}/class/projectModel/.+'),
        re.compile(f'{_PATH}/class/databaseModel/.+')
    ]
    _last_time = 0

    def is_ext(self, filename):
        """检查文件是否为需要监控的类型"""
        fname = os.path.basename(filename)
        if not fname or '.' not in fname:
            return False
            
        ext = fname.split('.')[-1]
        if ext not in self._exts:
            return False
            
        for pattern in self._exclude_patterns:
            if pattern.match(filename):
                return False
                
        return True

    def panel_reload(self, filename, event_type):
        """处理面板重载事件"""
        stime = time.time()
        if stime - self._last_time < 2:  # 防抖处理
            return
            
        self._last_time = stime
        logger.debug(f'检测到文件: {filename} -> {event_type}')

        fname = os.path.basename(filename)
        if fname in ['BT-Task', 'task.py']:
            logger.info('正在重启后台任务...')
            public.ExecShell(f"nohup bash {_PATH}/init.sh restart &>{ERROR_LOG} &")
            logger.info('后台任务已启动!')
        else:
            logger.info('正在重启面板...')
            time.sleep(0.5)  # 给系统一些时间处理文件变更
            public.ExecShell(f"nohup bash {_PATH}/init.sh reload &>{ERROR_LOG} &")

    def process_IN_CREATE(self, event):
        """处理文件创建事件"""
        if self.is_ext(event.pathname):
            # 使用协程池处理事件
            greenlet_pool.spawn(self.panel_reload, event.pathname, '[创建]')

    def process_IN_DELETE(self, event):
        """处理文件删除事件"""
        if self.is_ext(event.pathname):
            greenlet_pool.spawn(self.panel_reload, event.pathname, '[删除]')

    def process_IN_MODIFY(self, event):
        """处理文件修改事件"""
        if self.is_ext(event.pathname):
            greenlet_pool.spawn(self.panel_reload, event.pathname, '[修改]')

    def process_IN_MOVED_TO(self, event):
        """处理文件移动事件"""
        if self.is_ext(event.pathname):
            greenlet_pool.spawn(self.panel_reload, event.pathname, '[覆盖]')

def start_file_watcher():
    """启动文件变更监控"""
    logger.info('启动文件变更监控...')
    try:
        event_handler = PanelEventHandler()
        watch_manager = pyinotify.WatchManager()
        mask = pyinotify.IN_CREATE | pyinotify.IN_DELETE | pyinotify.IN_MODIFY | pyinotify.IN_MOVED_TO
        watch_manager.add_watch(_PATH, mask, auto_add=True, rec=True)
        notifier = pyinotify.Notifier(watch_manager, event_handler)
        notifier.loop()
    except Exception as e:
        logger.error(f"启动文件监控失败: {e}")

def get_server_port():
    """获取服务器端口配置"""
    try:
        with open(PORT_FILE) as f:
            port = int(f.read().strip())
            return port if port else 8888
    except Exception as e:
        logger.warning(f"读取端口配置失败，使用默认端口 8888: {e}")
        return 8888

def get_server_host():
    """获取服务器主机配置"""
    return "0:0:0:0:0:0:0:0" if os.path.exists(IPV6_FLAG) else '0.0.0.0'

def optimize_socket_options(server_socket):
    """优化套接字选项"""
    try:
        # 增大TCP缓冲区提高吞吐量
        server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, TCP_BUFFER_SIZE)
        server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF, TCP_BUFFER_SIZE)
        
        # 启用TCP keep-alive
        server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
        
        # 设置TCP keep-alive参数
        server_socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE, 60)
        server_socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPINTVL, 10)
        server_socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPCNT, 5)
        
        logger.info(f"套接字优化已应用: 缓冲区大小={TCP_BUFFER_SIZE}")
    except Exception as e:
        logger.warning(f"套接字优化失败: {e}")

def create_server_socket(host, port, ssl_context=None):
    """创建并优化服务器套接字"""
    
    # 创建套接字
    if host == "0:0:0:0:0:0:0:0":  # IPv6
        server_socket = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
        server_socket.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 0)
    else:  # IPv4
        server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    
    # 设置套接字选项
    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    optimize_socket_options(server_socket)
    
    # 绑定地址和端口
    server_socket.bind((host, port))
    server_socket.listen(100)  # 增大backlog
    
    logger.info(f"服务器套接字已创建: {host}:{port}")
    return server_socket

def start_web_server():
    """启动Web服务器"""
    # 获取配置
    PORT = get_server_port()
    HOST = get_server_host()
    ssl_context = setup_ssl_context()
    
    # 启动服务器
    try:
        # 创建并优化服务器套接字
        server_socket = create_server_socket(HOST, PORT, ssl_context)
        
        # 尝试使用flask_sock
        try:
            import flask_sock
            if ssl_context:
                http_server = WSGIServer(server_socket, app, ssl_context=ssl_context, log=app.logger,spawn=100)
            else:
                http_server = WSGIServer(server_socket, app, log=app.logger,spawn=100)
            logger.info(f"服务器将使用flask_sock在 {HOST}:{PORT} 启动")
        except:
            # 回退到geventwebsocket
            from geventwebsocket.handler import WebSocketHandler
            if ssl_context:
                http_server = WSGIServer(server_socket, app, ssl_context=ssl_context, 
                                        handler_class=WebSocketHandler, log=app.logger,spawn=100)
            else:
                http_server = WSGIServer(server_socket, app, handler_class=WebSocketHandler, log=app.logger,spawn=100)
            logger.info(f"服务器将使用geventwebsocket在 {HOST}:{PORT} 启动")
        
        # 记录启动信息
        protocol = "HTTPS" if ssl_context else "HTTP"
        logger.info(f"{protocol} 服务器已启动，监听地址: {HOST}:{PORT}")
        
        # 启动服务器
        http_server.serve_forever()
    except Exception as e:
        try:
            if e.errno == 98 or 'Address already in use' in str(e):
                logger.info(f"端口 {PORT} 已被占用，请检查是否有其他程序占用该端口。")
                logger.info(f"如是新安装面板可尝试重装解决")
        except:
            pass
        logger.critical(f"启动Web服务器失败: {e}")
        sys.exit(1)

def daemonize():
    """将进程转为守护进程"""
    # 确保我们不是进程组组长
    if os.fork():
        sys.exit(0)
    
    # 创建新会话
    os.setsid()
    
    # 再次fork，确保我们不是会话组长
    if os.fork():
        sys.exit(0)
    
    # 关闭标准输入输出
    sys.stdout.flush()
    sys.stderr.flush()
    
    # 重定向标准输入到/dev/null
    si = open(os.devnull, 'r')
    os.dup2(si.fileno(), sys.stdin.fileno())
    
    # 重定向标准输出和错误到日志文件
    if is_debug:
        try:
            so = open(ERROR_LOG, 'a+')
            os.dup2(so.fileno(), sys.stdout.fileno())
            os.dup2(so.fileno(), sys.stderr.fileno())
        except Exception as e:
            logger.error(f"重定向输出失败: {e}")

def init_jobs():
    '''初始化面板环境检查任务'''
    public.ExecShell("nohup {} {}/class/jobs.py &>{}/logs/jobs.log &".format(public.get_python_bin(), _PATH, _PATH))

def main():
    """主函数"""
    try:
        # 设置日志
        setup_logging()
        
        # 清理旧进程
        if os.path.exists(PID_FILE):
            try:
                pid = public.readFile(PID_FILE).strip()
                if pid:
                    os.system(f"kill -9 {pid}")
                    if os.path.exists(PID_FILE):
                        time.sleep(0.5)
                        os.system(f"kill -9 {pid}")
                        time.sleep(0.5)
                    logger.info(f"已终止旧面板进程 {pid}")
            except Exception as e:
                logger.warning(f"终止旧面板进程失败: {e}")
        
        # 守护进程模式
        daemonize()
        # 写入新的PID
        with open(PID_FILE, 'w') as f:
            f.write(str(os.getpid()))
        
        # 初始化
        logger.info("面板启动中...")
        check_plugin_loader()
        cleanup()
        check_upgrade()
        init_database()
        init_jobs()
        
        # 启动后台任务
        start_background_task()
        
        # 启动任务监控线程
        task_thread = threading.Thread(target=monitor_task)
        task_thread.daemon = True
        task_thread.start()
        
        # 调试模式下启动文件监控
        if is_debug:
            logger.info("调试模式已启用")
            dev_thread = threading.Thread(target=start_file_watcher)
            dev_thread.daemon = True
            dev_thread.start()
        
        # 启动Web服务器
        start_web_server()
        
    except Exception as e:
        logger.critical(f"面板启动失败: {e}")
        sys.exit(1)

if __name__ == '__main__':
    main()