import eventlet
import logging

# 配置 eventlet 日志，抑制 IOClosed 等错误日志
logging.getLogger('eventlet.hubs').setLevel(logging.CRITICAL)
logging.getLogger('eventlet.greenio').setLevel(logging.CRITICAL)

# 进行猴子补丁操作
eventlet.monkey_patch()

# 配置 eventlet 以更优雅地处理错误，避免疯狂报错
try:
    import eventlet
    import traceback
    
    # 1. 首先，禁用 eventlet 的调试日志，减少输出
    import logging
    logging.getLogger('eventlet').setLevel(logging.CRITICAL)
    logging.getLogger('socketio').setLevel(logging.CRITICAL)
    logging.getLogger('werkzeug').setLevel(logging.CRITICAL)
    
    # 2. 配置 eventlet 相关设置（移除了不存在的debug属性）
    
    # 3. 避免重复打印相同错误的机制
    seen_errors = set()
    max_error_logs = 5  # 每个错误最多打印5次
    error_counts = {}
    
    def is_duplicate_error(e):
        """检查是否为重复错误"""
        error_key = f"{type(e).__name__}: {e}"
        if error_key in seen_errors:
            error_counts[error_key] = error_counts.get(error_key, 0) + 1
            if error_counts[error_key] > max_error_logs:
                return True
        else:
            seen_errors.add(error_key)
            error_counts[error_key] = 1
        return False
    
    # 4. 增强错误处理，确保所有绿色线程错误都被捕获
    # 保存原始的 greenlet 主函数，包装它以捕获所有异常
    import eventlet.greenthread
    original_main = eventlet.greenthread.main
    
    def custom_greenthread_main(*args, **kwargs):
        """包装 greenlet 主函数，捕获所有异常，防止服务器宕机"""
        try:
            return original_main(*args, **kwargs)
        except Exception as e:
            # 捕获所有绿色线程中的异常
            if not is_duplicate_error(e):
                print(f"[Eventlet GreenThread Error] {type(e).__name__}: {e}")
                print("[Traceback]")
                traceback.print_exc()
            # 返回 None 继续运行，防止服务器宕机
            return None
    
    # 替换原始的 greenlet 主函数
    eventlet.greenthread.main = custom_greenthread_main
    
    # 5. 只修改关键的 greenio 方法，确保在致命错误时彻底关闭连接
    from eventlet import greenio
    
    # 保存并替换原始的 greenio 方法
    if hasattr(greenio.base.GreenSocket, '_recv_loop'):
        original_recv_loop = greenio.base.GreenSocket._recv_loop
        
        def custom_recv_loop(self, recv_func, recv_args, *args, **kwargs):
            try:
                return original_recv_loop(self, recv_func, recv_args, *args, **kwargs)
            except Exception as e:
                if not is_duplicate_error(e):
                    print(f"[Eventlet IO Error] _recv_loop: {type(e).__name__}: {e}")
                    print("[Traceback]")
                    traceback.print_exc()
                # 彻底关闭连接，不再继续处理
                try:
                    self.close()
                except Exception:
                    pass
                return b''
        
        greenio.base.GreenSocket._recv_loop = custom_recv_loop
    
    if hasattr(greenio.base.GreenSocket, 'recv_into'):
        original_recv_into = greenio.base.GreenSocket.recv_into
        
        def custom_recv_into(self, buffer, nbytes=0, flags=0):
            try:
                return original_recv_into(self, buffer, nbytes, flags)
            except Exception as e:
                if not is_duplicate_error(e):
                    print(f"[Eventlet IO Error] recv_into: {type(e).__name__}: {e}")
                    print("[Traceback]")
                    traceback.print_exc()
                # 彻底关闭连接，不再继续处理
                try:
                    self.close()
                except Exception:
                    pass
                return 0
        
        greenio.base.GreenSocket.recv_into = custom_recv_into
    
    if hasattr(greenio.base.GreenSocket, '_send_loop'):
        original_send_loop = greenio.base.GreenSocket._send_loop
        
        def custom_send_loop(self, send_func, data, *args, **kwargs):
            try:
                return original_send_loop(self, send_func, data, *args, **kwargs)
            except Exception as e:
                if not is_duplicate_error(e):
                    print(f"[Eventlet IO Error] _send_loop: {type(e).__name__}: {e}")
                    print("[Traceback]")
                    traceback.print_exc()
                # 彻底关闭连接，不再继续处理
                try:
                    self.close()
                except Exception:
                    pass
                return 0
        
        greenio.base.GreenSocket._send_loop = custom_send_loop
    
    if hasattr(greenio.base.GreenSocket, 'send'):
        original_send = greenio.base.GreenSocket.send
        
        def custom_send(self, data, flags=0):
            try:
                return original_send(self, data, flags)
            except Exception as e:
                if not is_duplicate_error(e):
                    print(f"[Eventlet IO Error] send: {type(e).__name__}: {e}")
                    print("[Traceback]")
                    traceback.print_exc()
                # 彻底关闭连接，不再继续处理
                try:
                    self.close()
                except Exception:
                    pass
                return 0
        
        greenio.base.GreenSocket.send = custom_send
    
    # 5. 处理 WSGI 中的错误，确保彻底清理
    try:
        import eventlet.wsgi
        
        if hasattr(eventlet.wsgi.HttpProtocol, 'handle_one_request'):
            original_wsgi_handle_one_request = eventlet.wsgi.HttpProtocol.handle_one_request
            
            def custom_wsgi_handle_one_request(self):
                try:
                    return original_wsgi_handle_one_request(self)
                except Exception as e:
                    if not is_duplicate_error(e):
                        print(f"[Eventlet WSGI Request Error] {type(e).__name__}: {e}")
                        print("[Traceback]")
                        traceback.print_exc()
                    # 彻底清理连接，不再继续
                    try:
                        self.rfile.close()
                        self.wfile.close()
                        self.finish()
                    except Exception:
                        pass
                    return
            
            eventlet.wsgi.HttpProtocol.handle_one_request = custom_wsgi_handle_one_request
        
        if hasattr(eventlet.wsgi.HttpProtocol, 'handle_one_response'):
            original_wsgi_handle_one_response = eventlet.wsgi.HttpProtocol.handle_one_response
            
            def custom_wsgi_handle_one_response(self):
                try:
                    return original_wsgi_handle_one_response(self)
                except Exception as e:
                    if not is_duplicate_error(e):
                        print(f"[Eventlet WSGI Response Error] {type(e).__name__}: {e}")
                        print("[Traceback]")
                        traceback.print_exc()
                    # 彻底清理连接，不再继续
                    try:
                        self.rfile.close()
                        self.wfile.close()
                        self.finish()
                    except Exception:
                        pass
                    return
            
            eventlet.wsgi.HttpProtocol.handle_one_response = custom_wsgi_handle_one_response
    except Exception as e:
        # 如果修改失败，忽略错误
        print(f"[WSGI Patch Error] {e}")
    
    print("[Eventlet Error Handling] Configured to handle errors gracefully, avoiding duplicate logs")
except Exception as e:
    # 如果修改失败，打印错误但继续运行
    print(f"[Eventlet Patch Initialization Error] {e}")
    traceback.print_exc()

from flask import Flask
from .views.routes import main_bp
from .views.file import file_bp
from .config import Config
from .extensions import init_extensions,register_namespaces

def create_app():
    app = Flask(__name__, template_folder="../templates", static_folder="../static",static_url_path="/vsc-like/static")
    app.config.from_object(Config)
    @app.route('/')
    def hello():
        return 'Hello, World!'

    # 注册蓝图
    app.register_blueprint(main_bp)
    app.register_blueprint(file_bp)
    # 初始化SocketIO
    init_extensions(app)

    register_namespaces(app)

    return app