BodyBalanceEvaluation/backend/app.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
平衡体态检测系统 - 后端服务
基于Flask的本地API服务
"""

import os
import sys
import json
import time
import threading
from datetime import datetime
from flask import Flask, jsonify, send_file
from flask import request as flask_request
from flask_cors import CORS
import sqlite3
import logging
from pathlib import Path
from flask_socketio import SocketIO, emit
import cv2
import configparser
import os

# 添加当前目录到Python路径
sys.path.append(os.path.dirname(os.path.abspath(__file__)))

# 导入自定义模块
from database import DatabaseManager
from device_manager import DeviceManager, VideoStreamManager
from utils import config as app_config

# 配置日志
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
    handlers=[
        logging.FileHandler('logs/backend.log', encoding='utf-8'),
        logging.StreamHandler()
    ]
)
logger = logging.getLogger(__name__)

# 创建Flask应用
app = Flask(__name__)
app.config['SECRET_KEY'] = 'body-balance-detection-system-2024'
socketio = SocketIO(app, 
                   cors_allowed_origins='*', 
                   async_mode='threading', 
                   logger=False, 
                   engineio_logger=False)

import logging
logging.getLogger('socketio').setLevel(logging.WARNING)
logging.getLogger('engineio').setLevel(logging.WARNING)

# 启用CORS支持
CORS(app, origins='*', supports_credentials=True, allow_headers=['Content-Type', 'Authorization'], methods=['GET', 'POST', 'PUT', 'DELETE', 'OPTIONS'])

# 注册Blueprint（如需要可在此处添加）

# 读取RTSP配置
config = configparser.ConfigParser()
config.read(os.path.join(os.path.dirname(__file__), '..', 'config.ini'), encoding='utf-8')
device_index = config.get('CAMERA', 'device_index', fallback=None)

# 全局变量
db_manager = None
device_manager = None
current_detection = None
detection_thread = None
video_stream_manager = None



def init_app():
    """初始化应用"""
    global db_manager, device_manager, video_stream_manager
    
    try:
        # 创建必要的目录
        os.makedirs('logs', exist_ok=True)
        os.makedirs('data', exist_ok=True)      
        
        # 从配置文件读取数据库路径
        db_path_config = app_config.get('DATABASE', 'path', 'backend/data/body_balance.db')
        # 如果是相对路径，基于当前脚本目录解析
        if not os.path.isabs(db_path_config):
            # 获取当前脚本所在目录（backend目录）
            current_dir = os.path.dirname(os.path.abspath(__file__))
            # 如果配置路径以 'backend/' 开头，去掉这个前缀
            if db_path_config.startswith('backend/'):
                db_path_config = db_path_config[8:]  # 去掉 'backend/' 前缀
            db_path = os.path.join(current_dir, db_path_config)
        else:
            db_path = db_path_config
        
        # 确保数据库目录存在
        db_dir = os.path.dirname(db_path)
        os.makedirs(db_dir, exist_ok=True)
        
        # 初始化数据库
        db_manager = DatabaseManager(db_path)
        db_manager.init_database()
        
        # 初始化设备管理器
        device_manager = DeviceManager(db_manager)
        device_manager.set_socketio(socketio)  # 设置WebSocket连接
        
        # 自动启动推流以填充帧缓存
        if device_manager.device_status['camera']:
            streaming_result = device_manager.start_streaming()
            logger.info(f'自动启动推流结果: {streaming_result}')
        
        # 初始化视频流管理器
        video_stream_manager = VideoStreamManager(socketio)
        
        logger.info('应用初始化完成')
        
    except Exception as e:
        logger.error(f'应用初始化失败: {e}')
        raise

# ==================== 基础API ====================

@app.route('/health', methods=['GET'])
def health_check():
    """健康检查"""
    return jsonify({
        'status': 'ok',
        'timestamp': datetime.now().isoformat(),
        'version': '1.0.0'
    })

@app.route('/api/health', methods=['GET'])
def api_health_check():
    """API健康检查"""
    return jsonify({
        'status': 'ok',
        'timestamp': datetime.now().isoformat(),
        'version': '1.0.0'
    })

@app.route('/api/frame-cache/status', methods=['GET'])
def get_frame_cache_status():
    """获取帧缓存状态"""
    try:
        if device_manager:
            cache_info = device_manager.get_frame_cache_info()
            return jsonify({
                'success': True,
                'data': cache_info,
                'timestamp': datetime.now().isoformat()
            })
        else:
            return jsonify({
                'success': False,
                'error': '设备管理器未初始化',
                'timestamp': datetime.now().isoformat()
            }), 500
    except Exception as e:
        logger.error(f'获取帧缓存状态失败: {e}')
        return jsonify({
            'success': False,
            'error': str(e),
            'timestamp': datetime.now().isoformat()
        }), 500

# ==================== 认证API ====================

@app.route('/api/auth/login', methods=['POST'])
def login():
    """用户登录"""
    try:
        data = flask_request.get_json()
        username = data.get('username')
        password = data.get('password')
        remember = data.get('remember', False)
        if not username or not password:
            return jsonify({
                'success': False,
                'message': '用户名或密码不能为空'
            }), 400
        
        # 使用数据库验证用户
        user = db_manager.authenticate_user(username, password)
        
        if user:
            # 检查用户是否已激活
            if not user['is_active']:
                return jsonify({
                    'success': False,
                    'message': '账户未激活，请联系管理员审核'
                }), 403
            
            # 构建用户数据
            user_data = {
                'id': user['id'],
                'username': user['username'],
                'name': user['name'],
                'role': 'admin' if user['user_type'] == 'admin' else 'user',
                'user_type': user['user_type'],
                'avatar': ''
            }
            
            # 生成token（实际项目中应使用JWT等安全token）
            token = f"token_{username}_{int(time.time())}"
            
            logger.info(f'用户 {username} 登录成功')
            
            return jsonify({
                'success': True,
                'data': {
                    'token': token,
                    'user': user_data
                },
                'message': '登录成功'
            })
        else:
            logger.warning(f'用户 {username} 登录失败：用户名或密码错误')
            return jsonify({
                'success': False,
                'message': '用户名或密码错误'
            }), 401
            
    except Exception as e:
        logger.error(f'登录失败: {e}')
        return jsonify({'success': False, 'message': '登录失败'}), 500

@app.route('/api/auth/register', methods=['POST'])
def register():
    """用户注册"""
    try:
        data = flask_request.get_json()
        username = data.get('username')
        password = data.get('password')
        name = data.get('name') or data.get('email', '')
        phone = data.get('phone')
        
        if not username or not password:
            return jsonify({
                'success': False,
                'message': '用户名和密码不能为空'
            }), 400
        
        if len(password) < 6:
            return jsonify({
                'success': False,
                'message': '密码长度不能少于6位'
            }), 400
        
        # 构建用户数据字典
        user_data = {
            'username': username,
            'password': password,
            'name': name,
            'phone': phone
        }
        
        # 使用数据库注册用户
        result = db_manager.register_user(user_data)
        
        if result['success']:
            logger.info(f'用户 {username} 注册成功，等待管理员审核')
            return jsonify({
                'success': True,
                'message': '注册成功，请等待管理员审核后登录'
            })
        else:
            return jsonify({
                'success': False,
                'message': result['message']
            }), 400
            
    except Exception as e:
        logger.error(f'注册失败: {e}')
        return jsonify({'success': False, 'message': '注册失败'}), 500

@app.route('/api/auth/logout', methods=['POST'])
def logout():
    """用户退出"""
    try:
        return jsonify({
            'success': True,
            'message': '退出成功'
        })
    except Exception as e:
        logger.error(f'退出失败: {e}')
        return jsonify({'success': False, 'message': '退出失败'}), 500

@app.route('/api/auth/verify', methods=['GET'])
def verify_token():
    """验证token"""
    try:
        # 简单的token验证（实际项目中应验证JWT等）
        auth_header = flask_request.headers.get('Authorization')
        if auth_header and auth_header.startswith('Bearer '):
            token = auth_header.split(' ')[1]
            # 这里可以添加真实的token验证逻辑
            return jsonify({
                'success': True,
                'data': {'valid': True}
            })
        else:
            return jsonify({
                'success': True,
                'data': {'valid': True}  # 暂时总是返回有效
            })
    except Exception as e:
        logger.error(f'验证token失败: {e}')
        return jsonify({'success': False, 'message': '验证失败'}), 500

@app.route('/api/auth/forgot-password', methods=['POST'])
def forgot_password():
    """忘记密码 - 根据用户名和手机号找回密码"""
    try:
        data = flask_request.get_json()
        username = data.get('username')
        phone = data.get('phone')
        
        if not username:
            return jsonify({
                'success': False,
                'error': '请输入用户名'
            }), 400
            
        if not phone:
            return jsonify({
                'success': False,
                'error': '请输入手机号码'
            }), 400
        
        # 验证手机号格式
        import re
        phone_pattern = r'^1[3-9]\d{9}$'
        if not re.match(phone_pattern, phone):
            return jsonify({
                'success': False,
                'error': '手机号格式不正确'
            }), 400
        
        # 查询用户信息
        conn = db_manager.get_connection()
        cursor = conn.cursor()
        
        cursor.execute('''
            SELECT username, password, phone FROM users 
            WHERE username = ? AND phone = ?
        ''', (username, phone))
        
        user = cursor.fetchone()
        
        if user:
            # 用户存在且手机号匹配，返回数据库中存储的实际密码
            actual_password = user['password']
            
            logger.info(f'用户 {username} 密码查询成功')
            
            return jsonify({
                'success': True,
                'password': actual_password,  # 返回数据库中存储的实际密码
                'message': '密码找回成功'
            })
        else:
            # 检查用户是否存在
            cursor.execute('SELECT username FROM users WHERE username = ?', (username,))
            user_exists = cursor.fetchone()
            
            if not user_exists:
                return jsonify({
                    'success': False,
                    'error': '用户不存在'
                }), 400
            else:
                return jsonify({
                    'success': False,
                    'error': '手机号不匹配'
                }), 400
            
    except Exception as e:
        logger.error(f'忘记密码处理失败: {e}')
        return jsonify({'success': False, 'error': '处理失败'}), 500

# ==================== 用户管理API ====================

@app.route('/api/users', methods=['GET'])
def get_users():
    """获取用户列表（管理员功能）"""
    try:
        # 这里应该验证管理员权限
        page = int(flask_request.args.get('page', 1))
        size = int(flask_request.args.get('size', 10))
        status = flask_request.args.get('status')  # active, inactive, all
        
        users = db_manager.get_users(page, size, status)
        total = db_manager.get_users_count(status)
        
        return jsonify({
            'success': True,
            'data': {
                'users': users,
                'total': total,
                'page': page,
                'size': size
            }
        })
        
    except Exception as e:
        logger.error(f'获取用户列表失败: {e}')
        return jsonify({'success': False, 'message': '获取用户列表失败'}), 500

@app.route('/api/users/<int:user_id>/approve', methods=['POST'])
def approve_user(user_id):
    """审核用户（管理员功能）"""
    try:
        # 这里应该验证管理员权限
        data = flask_request.get_json()
        approve = data.get('approve', True)
        
        result = db_manager.approve_user(user_id, approve)
        
        if result['success']:
            action = '审核通过' if approve else '审核拒绝'
            logger.info(f'用户 {user_id} {action}')
            return jsonify({
                'success': True,
                'message': f'用户{action}成功'
            })
        else:
            return jsonify({
                'success': False,
                'message': result['message']
            }), 400
            
    except Exception as e:
        logger.error(f'审核用户失败: {e}')
        return jsonify({'success': False, 'message': '审核用户失败'}), 500

@app.route('/api/users/<int:user_id>', methods=['DELETE'])
def delete_user(user_id):
    """删除用户（管理员功能）"""
    try:
        # 这里应该验证管理员权限
        result = db_manager.delete_user(user_id)
        
        if result['success']:
            logger.info(f'用户 {user_id} 删除成功')
            return jsonify({
                'success': True,
                'message': '用户删除成功'
            })
        else:
            return jsonify({
                'success': False,
                'message': result['message']
            }), 400
            
    except Exception as e:
        logger.error(f'删除用户失败: {e}')
        return jsonify({'success': False, 'message': '删除用户失败'}), 500


@app.route('/api/system/info', methods=['GET'])
def get_system_info():
    """获取系统信息"""
    try:
        info = {
            'version': '1.0.0',
            'start_time': datetime.now().isoformat(),
            'database_status': 'connected' if db_manager else 'disconnected',
            'device_count': len(device_manager.get_connected_devices()) if device_manager else 0
        }
        return jsonify({'success': True, 'data': info})
    except Exception as e:
        logger.error(f'获取系统信息失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500


# ==================== 患者管理API ====================

@app.route('/api/patients', methods=['GET'])
def get_patients():
    """获取患者列表"""
    try:
        page = int(flask_request.args.get('page', 1))
        size = int(flask_request.args.get('size', 10))
        keyword = flask_request.args.get('keyword', '')
        
        patients = db_manager.get_patients(page, size, keyword)
        total = db_manager.get_patients_count(keyword)
        
        return jsonify({
            'success': True,
            'data': {
                'patients': patients,
                'total': total,
                'page': page,
                'size': size
            }
        })
    except Exception as e:
        logger.error(f'获取患者列表失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500

@app.route('/api/patients', methods=['POST'])
def create_patient():
    """创建患者"""
    try:
        data = flask_request.get_json()
        patient_id = db_manager.create_patient(data)
        return jsonify({
            'success': True,
            'data': {'patient_id': patient_id},
            'message': '患者创建成功'
        })
    except Exception as e:
        logger.error(f'创建患者失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500

@app.route('/api/patients/<patient_id>', methods=['PUT'])
def update_patient(patient_id):
    """更新患者信息"""
    try:
        data = flask_request.get_json()
        db_manager.update_patient(patient_id, data)
        return jsonify({'success': True, 'message': '患者信息更新成功'})
    except Exception as e:
        logger.error(f'更新患者信息失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500

@app.route('/api/patients/<patient_id>', methods=['GET'])
def get_patient(patient_id):
    """获取单个患者信息"""
    try:
        patient = db_manager.get_patient(patient_id)
        if patient:
            return jsonify({'success': True, 'data': patient})
        else:
            return jsonify({'success': False, 'error': '患者不存在'}), 404
    except Exception as e:
        logger.error(f'获取患者信息失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500

@app.route('/api/patients/<patient_id>', methods=['DELETE'])
def delete_patient(patient_id):
    """删除患者"""
    try:
        db_manager.delete_patient(patient_id)
        return jsonify({'success': True, 'message': '患者删除成功'})
    except Exception as e:
        logger.error(f'删除患者失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500

# ==================== 设备管理API ====================

@app.route('/api/devices/status', methods=['GET'])
def get_device_status():
    """获取设备状态"""
    try:
        if not device_manager:
            return jsonify({'camera': False, 'imu': False, 'pressure': False})
        
        status = device_manager.get_device_status()
        return jsonify(status)
    except Exception as e:
        logger.error(f'获取设备状态失败: {e}')
        return jsonify({'camera': False, 'imu': False, 'pressure': False})

@app.route('/api/devices/refresh', methods=['POST'])
def refresh_devices():
    """刷新设备连接"""
    try:
        if device_manager:
            device_manager.refresh_devices()
        return jsonify({'success': True, 'message': '设备已刷新'})
    except Exception as e:
        logger.error(f'刷新设备失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500

@app.route('/api/devices/calibrate', methods=['POST'])
def calibrate_devices():
    """校准设备"""
    try:
        if device_manager:
            result = device_manager.calibrate_devices()
            return jsonify({'success': True, 'data': result})
        return jsonify({'success': False, 'error': '设备管理器未初始化'}), 500
    except Exception as e:
        logger.error(f'设备校准失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500

@app.route('/api/devices/calibrate/imu', methods=['POST'])
def calibrate_imu():
    """校准IMU头部姿态传感器"""
    try:
        if not device_manager:
            return jsonify({'success': False, 'error': '设备管理器未初始化'}), 500
        
        if not device_manager.device_status.get('imu', False):
            return jsonify({'success': False, 'error': 'IMU设备未连接'}), 400
        
        # 执行IMU校准
        result = device_manager._calibrate_imu()
        
        if result.get('status') == 'success':
            logger.info('IMU头部姿态校准成功')
            return jsonify({
                'success': True, 
                'message': 'IMU头部姿态校准成功，正立状态已设为零位基准',
                'data': result
            })
        else:
            logger.error(f'IMU校准失败: {result.get("error", "未知错误")}')
            return jsonify({
                'success': False, 
                'error': result.get('error', 'IMU校准失败')
            }), 500
            
    except Exception as e:
        logger.error(f'IMU校准异常: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500


# ==================== 视频推流API ====================

@app.route('/api/streaming/start', methods=['POST'])
def start_video_streaming():
    """启动视频推流"""
    try:
        if not device_manager:
            return jsonify({'success': False, 'error': '设备管理器未初始化'}), 500
        
        # 设置WebSocket连接
        device_manager.set_socketio(socketio)
        
        result = device_manager.start_streaming()
        
        logger.info(f'视频推流启动结果: {result}')
        return jsonify({
            'success': True,
            'message': '视频推流已启动',
            'streaming_status': result
        })
        
    except Exception as e:
        logger.error(f'启动视频推流失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500

@app.route('/api/streaming/stop', methods=['POST'])
def stop_video_streaming():
    """停止视频推流"""
    try:
        if not device_manager:
            return jsonify({'success': False, 'error': '设备管理器未初始化'}), 500
        
        result = device_manager.stop_streaming()
        
        if result:
            logger.info('视频推流已停止')
            return jsonify({
                'success': True,
                'message': '视频推流已停止'
            })
        else:
            return jsonify({
                'success': False,
                'error': '停止推流失败'
            }), 500
            
    except Exception as e:
        logger.error(f'停止视频推流失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500

# ==================== 检测API ====================

@app.route('/api/detection/start', methods=['POST'])
def start_detection():
    """开始检测"""
    try:
        if not db_manager or not device_manager:
            return jsonify({'success': False, 'error': '数据库管理器或设备管理器未初始化'}), 500
        
        data = flask_request.get_json()
        patient_id = data.get('patient_id')
        creator_id = data.get('creator_id')
        if not patient_id or not creator_id:
            return jsonify({'success': False, 'error': '缺少患者ID或创建人ID'}), 400
        
        # 调用create_detection_session方法，settings传空字典
        session_id = db_manager.create_detection_session(patient_id, settings={}, creator_id=creator_id)
        
        # 开始同步录制
        recording_response = None
        try:
            recording_response = device_manager.start_recording(session_id, patient_id)
        except Exception as rec_e:
            logger.error(f'开始同步录制失败: {rec_e}')
        
        start_time = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
        
        return jsonify({'success': True, 'session_id': session_id, 'detectionStartTime': start_time, 'recording': recording_response})
    except Exception as e:
        logger.error(f'开始检测失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500

@app.route('/api/detection/<session_id>/stop', methods=['POST'])
def stop_detection(session_id):
    """停止检测"""
    try:
        if not db_manager or not device_manager:
            logger.error('数据库管理器或设备管理器未初始化')
            return jsonify({'success': False, 'error': '数据库管理器或设备管理器未初始化'}), 500
        
        if not session_id:
            logger.error('缺少会话ID')
            return jsonify({
                'success': False, 
                'error': '缺少会话ID'
            }), 400
        
        data = flask_request.get_json()
        logger.debug(f'接收到停止检测请求，session_id: {session_id}, 请求数据: {data}')
        # video_data = data.get('videoData') if data else None
        video_data = data['videoData']
        mime_type = data.get('mimeType', 'video/webm;codecs=vp9')  # 默认webm格式
        import base64
        # 验证base64视频数据格式
        if not video_data.startswith('data:video/'):
            return jsonify({
                'success': False,
                'message': '无效的视频数据格式'
            }), 400
        try:
            header, encoded = video_data.split(',', 1)
            video_bytes = base64.b64decode(encoded)
            # with open(r'D:/111.webm', 'wb') as f:
            #     f.write(video_bytes)
        except Exception as e:
            return jsonify({
                'success': False,
                'message': f'视频数据解码失败: {str(e)}'
            }), 400
        # 停止同步录制，传递视频数据
        try:
            logger.debug(f'调用device_manager.stop_recording，session_id: {session_id}, video_data长度: {len(video_data) if video_data else 0}')
            if video_data is None:
                logger.warning(f'视频数据为空，session_id: {session_id}')
            else:
                logger.debug(f'视频数据长度: {len(video_data)} 字符，约 {len(video_data)*3/4/1024:.2f} KB, session_id: {session_id}')
            restrt=device_manager.stop_recording(session_id, video_data_base64=video_bytes)
            logger.error(restrt)
        except Exception as rec_e:
            logger.error(f'停止同步录制失败: {rec_e}', exc_info=True)
            raise
        
        # 更新会话状态为已完成
        success = db_manager.update_session_status(session_id, 'completed')
        
        if success:
            logger.info(f'检测会话已停止 - 会话ID: {session_id}')
            return jsonify({
                'success': True,
                'message': '检测已停止'
            })
        else:
            logger.error('停止检测失败，更新会话状态失败')
            return jsonify({
                'success': False,
                'error': '停止检测失败'
            }), 500
            
    except Exception as e:
        logger.error(f'停止检测失败: {e}', exc_info=True)
        return jsonify({'success': False, 'error': str(e)}), 500

@app.route('/api/detection/<session_id>/status', methods=['GET'])
def get_detection_status(session_id):
    """获取检测状态"""
    try:
        if not db_manager:
            return jsonify({'success': False, 'error': '数据库管理器未初始化'}), 500
        
        if not session_id:
            return jsonify({
                'success': False, 
                'error': '缺少会话ID'
            }), 400
        
        # 获取会话数据
        session_data = db_manager.get_session_data(session_id)
        
        if session_data:
            return jsonify({
                'success': True,
                'data': session_data
            })
        else:
            return jsonify({
                'success': False,
                'error': '会话不存在'
            }), 404
            
    except Exception as e:
        logger.error(f'获取检测状态失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500

@app.route('/api/detection/<session_id>/collect', methods=['POST'])
def collect_detection_data(session_id):
    """采集检测数据"""
    try:
        if not db_manager:
            return jsonify({'success': False, 'error': '数据库管理器未初始化'}), 500
        
        if not device_manager:
            return jsonify({'success': False, 'error': '设备管理器未初始化'}), 500
        
        # 获取请求数据
        data = flask_request.get_json() or {}
        patient_id = data.get('patient_id')
        screen_image_base64 = data.get('imageData')
        
        # 如果没有提供patient_id，从会话信息中获取
        if not patient_id:
            session_data = db_manager.get_session_data(session_id)
            if not session_data:
                return jsonify({
                    'success': False,
                    'error': '检测会话不存在'
                }), 404
            patient_id = session_data.get('patient_id')
        
        if not patient_id:
            return jsonify({
                'success': False,
                'error': '无法获取患者ID'
            }), 400
        
        # 调用设备管理器采集数据
        collected_data = device_manager.collect_data(
            session_id=session_id,
            patient_id=patient_id,
            screen_image_base64=screen_image_base64
        )
        
        # 将采集的数据保存到数据库
        if collected_data:
            db_manager.save_detection_data(session_id, collected_data)
            logger.info(f'检测数据采集并保存成功: {session_id}')
        
        return jsonify({
            'success': True,
            'data': {
                'session_id': session_id,
                'timestamp': collected_data.get('timestamp'),
                'data_collected': bool(collected_data)
            },
            'message': '数据采集成功'
        })
        
    except Exception as e:
        logger.error(f'采集检测数据失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500

# ==================== 同步录制API ====================

@app.route('/api/recording/sync/start', methods=['POST'])
def start_sync_recording():
    """启动同步录制"""
    try:
        if not device_manager:
            return jsonify({'success': False, 'error': '设备管理器未初始化'}), 500
        
        data = flask_request.get_json()
        session_id = data.get('session_id')
        patient_id = data.get('patient_id')
        
        if not session_id or not patient_id:
            return jsonify({
                'success': False, 
                'error': '缺少必要参数: session_id 和 patient_id'
            }), 400
        
        result = device_manager.start_recording(session_id, patient_id)
        
        if result['success']:
            logger.info(f'同步录制已启动 - 会话ID: {session_id}, 患者ID: {patient_id}')
            return jsonify(result)
        else:
            return jsonify(result), 500
            
    except Exception as e:
        logger.error(f'启动同步录制失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500

@app.route('/api/recording/sync/stop', methods=['POST'])
def stop_sync_recording():
    """停止同步录制"""
    try:
        if not device_manager:
            return jsonify({'success': False, 'error': '设备管理器未初始化'}), 500
        
        data = flask_request.get_json()
        session_id = data.get('session_id')
        video_data = data.get('videoData')  # 新增接收前端传递的视频数据
        if not video_data.startswith('data:video/'):
            return jsonify({
                'success': False,
                'message': '无效的视频数据格式'
            }), 400
        
        # 提取base64数据
        try:
            import base64
            header, encoded = video_data.split(',', 1)
            video_bytes = base64.b64decode(encoded)
        except Exception as e:
            return jsonify({
                'success': False,
                'message': f'视频数据解码失败: {str(e)}'
            }), 400
        if not session_id:
            return jsonify({
                'success': False, 
                'error': '缺少必要参数: session_id'
            }), 400
        
        result = device_manager.stop_recording(session_id, video_data_base64=video_bytes)
        
        if result['success']:
            logger.info(f'同步录制已停止 - 会话ID: {session_id}')
            return jsonify(result)
        else:
            return jsonify(result), 500
        
    except Exception as e:
        logger.error(f'停止同步录制失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500


@app.route('/api/history/sessions', methods=['GET'])
def get_detection_sessions():
    """获取检测会话历史"""
    try:
        page = int(flask_request.args.get('page', 1))
        size = int(flask_request.args.get('size', 10))
        patient_id = flask_request.args.get('patient_id')
        
        sessions = db_manager.get_detection_sessions(page, size, patient_id)
        total = db_manager.get_sessions_count(patient_id)
        
        return jsonify({
            'success': True,
            'data': {
                'sessions': sessions,
                'total': total,
                'page': page,
                'size': size
            }
        })
        
    except Exception as e:
        logger.error(f'获取检测历史失败: {e}')
        return jsonify({'success': False, 'error': str(e)}), 500


# ==================== 错误处理 ====================

@app.errorhandler(404)
def not_found(error):
    return jsonify({'success': False, 'error': 'API接口不存在'}), 404

@app.errorhandler(500)
def internal_error(error):
    return jsonify({'success': False, 'error': '服务器内部错误'}), 500

if __name__ == '__main__':
    import argparse
    
    # 解析命令行参数
    parser = argparse.ArgumentParser(description='Body Balance Evaluation System Backend')
    parser.add_argument('--host', default=None, help='Host address to bind to')
    parser.add_argument('--port', type=int, default=None, help='Port number to bind to')
    parser.add_argument('--debug', action='store_true', help='Enable debug mode')
    args = parser.parse_args()
    
    try:
        # 初始化应用
        init_app()
        
        # 确定主机和端口
        host = args.host if args.host else config.get('SERVER', 'host', fallback='127.0.0.1')
        port = args.port if args.port else config.getint('SERVER', 'port', fallback=5000)
        debug = args.debug if args.debug else config.getboolean('APP', 'debug', fallback=False)
        
        # 启动Flask+SocketIO服务
        logger.info(f'启动后端服务... Host: {host}, Port: {port}, Debug: {debug}')
        socketio.run(app,
            host=host,
            port=port,
            debug=debug,
            use_reloader=False,  # 禁用热重载以避免进程问题
            log_output=True,     # 启用详细日志
            allow_unsafe_werkzeug=True
        )
    except KeyboardInterrupt:
        logger.info('服务被用户中断')
    except Exception as e:
        logger.error(f'服务启动失败: {e}')
        sys.exit(1)
    finally:
        logger.info('后端服务已停止')

# ==================== WebSocket 事件处理 ====================

# 简单的测试事件处理器
@socketio.on('connect')
def handle_connect():
    # print('CLIENT CONNECTED!!!', flush=True)  # 控制台打印测试已关闭
    logger.info('客户端已连接')

@socketio.on('disconnect')
def handle_disconnect():
    # print('CLIENT DISCONNECTED!!!', flush=True)  # 控制台打印测试已关闭
    logger.info('客户端已断开连接')

# 原始的start_video处理逻辑（暂时注释）
@socketio.on('start_video_stream')
def handle_start_video(data=None):
    try:
        results = {'status': 'success', 'cameras': {}}
        
        logger.info(f'video_stream_manager状态: {video_stream_manager is not None}')
        logger.info(f'device_manager状态: {device_manager is not None}')
        
        # 启动视频流管理器（普通摄像头）
        if video_stream_manager:
            logger.info('正在启动视频流管理器...')
            video_result = video_stream_manager.start_video_stream()
            logger.info(f'视频流管理器启动结果: {video_result}')
            results['cameras']['normal'] = video_result
        else:
            logger.error('视频流管理器未初始化')
            results['cameras']['normal'] = {'status': 'error', 'message': '视频流管理器未初始化'}
        
        # 启动FemtoBolt深度相机
        if device_manager:
            logger.info('正在启动FemtoBolt深度相机...')
            femtobolt_result = device_manager.start_femtobolt_stream()
            logger.info(f'FemtoBolt启动结果: {femtobolt_result}')
            if femtobolt_result:
                results['cameras']['femtobolt'] = {'status': 'success', 'message': 'FemtoBolt深度相机推流已启动'}
            else:
                results['cameras']['femtobolt'] = {'status': 'error', 'message': 'FemtoBolt深度相机启动失败'}
        else:
            logger.error('设备管理器未初始化')
            results['cameras']['femtobolt'] = {'status': 'error', 'message': '设备管理器未初始化'}
        
        # 检查是否有任何相机启动成功
        success_count = sum(1 for cam_result in results['cameras'].values() if cam_result.get('status') == 'success')
        if success_count == 0:
            results['status'] = 'error'
            results['message'] = '所有相机启动失败'
        elif success_count < len(results['cameras']):
            results['status'] = 'partial'
            results['message'] = f'{success_count}/{len(results["cameras"])}个相机启动成功'
        else:
            results['message'] = '所有相机启动成功'
        
        logger.info(f'发送video_status事件: {results}')
        emit('video_status', results)
        
    except Exception as e:
        logger.error(f'启动视频流失败: {e}', exc_info=True)
        emit('video_status', {'status': 'error', 'message': f'启动失败: {str(e)}'})

@socketio.on('stop_video_stream')
def handle_stop_video(data=None):
    logger.info(f'收到stop_video事件，数据: {data}')
    
    try:
        results = {'status': 'success', 'cameras': {}}
        
        # 停止视频流管理器（普通摄像头）
        if video_stream_manager:
            video_result = video_stream_manager.stop_video_stream()
            results['cameras']['normal'] = video_result
        else:
            results['cameras']['normal'] = {'status': 'error', 'message': '视频流管理器未初始化'}
        
        # 停止FemtoBolt深度相机
        if device_manager:
            device_manager.stop_femtobolt_stream()
            results['cameras']['femtobolt'] = {'status': 'success', 'message': 'FemtoBolt深度相机推流已停止'}
        else:
            results['cameras']['femtobolt'] = {'status': 'error', 'message': '设备管理器未初始化'}
        
        # 检查是否有任何相机停止成功
        success_count = sum(1 for cam_result in results['cameras'].values() if cam_result.get('status') == 'success')
        if success_count == 0:
            results['status'] = 'error'
            results['message'] = '所有相机停止失败'
        elif success_count < len(results['cameras']):
            results['status'] = 'partial'
            results['message'] = f'{success_count}/{len(results["cameras"])}个相机停止成功'
        else:
            results['message'] = '所有相机停止成功'
        
        emit('video_status', results)
        
    except Exception as e:
        logger.error(f'停止视频流失败: {e}')
        emit('video_status', {'status': 'error', 'message': f'停止失败: {str(e)}'})

@socketio.on('start_imu_streaming')
def handle_start_imu_streaming(data=None):
    """启动IMU头部姿态数据推流"""
    try:
        if device_manager:
            result = device_manager.start_imu_streaming()
            if result:
                emit('imu_status', {'status': 'success', 'message': 'IMU头部姿态数据推流已启动'})
                logger.info('IMU头部姿态数据推流已启动')
            else:
                emit('imu_status', {'status': 'error', 'message': 'IMU头部姿态数据推流启动失败'})
                logger.error('IMU头部姿态数据推流启动失败')
        else:
            emit('imu_status', {'status': 'error', 'message': '设备管理器未初始化'})
            logger.error('设备管理器未初始化')
    except Exception as e:
        logger.error(f'启动IMU数据推流失败: {e}')
        emit('imu_status', {'status': 'error', 'message': f'启动失败: {str(e)}'})

@socketio.on('stop_imu_streaming')
def handle_stop_imu_streaming(data=None):
    """停止IMU头部姿态数据推流"""
    try:
        if device_manager:
            result = device_manager.stop_imu_streaming()
            if result:
                emit('imu_status', {'status': 'success', 'message': 'IMU头部姿态数据推流已停止'})
                logger.info('IMU头部姿态数据推流已停止')
            else:
                emit('imu_status', {'status': 'error', 'message': 'IMU头部姿态数据推流停止失败'})
                logger.error('IMU头部姿态数据推流停止失败')
        else:
            emit('imu_status', {'status': 'error', 'message': '设备管理器未初始化'})
            logger.error('设备管理器未初始化')
    except Exception as e:
        logger.error(f'停止IMU数据推流失败: {e}')
        emit('imu_status', {'status': 'error', 'message': f'停止失败: {str(e)}'})

@socketio.on('start_pressure_streaming')
def handle_start_pressure_streaming(data=None):
    """启动压力传感器足部压力数据推流"""
    try:
        if device_manager:
            result = device_manager.start_pressure_streaming()
            if result:
                emit('pressure_status', {'status': 'success', 'message': '压力传感器足部压力数据推流已启动'})
                logger.info('压力传感器足部压力数据推流已启动')
            else:
                emit('pressure_status', {'status': 'error', 'message': '压力传感器足部压力数据推流启动失败'})
                logger.error('压力传感器足部压力数据推流启动失败')
        else:
            emit('pressure_status', {'status': 'error', 'message': '设备管理器未初始化'})
            logger.error('设备管理器未初始化')
    except Exception as e:
        logger.error(f'启动压力传感器数据推流失败: {e}')
        emit('pressure_status', {'status': 'error', 'message': f'启动失败: {str(e)}'})

@socketio.on('stop_pressure_streaming')
def handle_stop_pressure_streaming(data=None):
    """停止压力传感器足部压力数据推流"""
    try:
        if device_manager:
            result = device_manager.stop_pressure_streaming()
            if result:
                emit('pressure_status', {'status': 'success', 'message': '压力传感器足部压力数据推流已停止'})
                logger.info('压力传感器足部压力数据推流已停止')
            else:
                emit('pressure_status', {'status': 'error', 'message': '压力传感器足部压力数据推流停止失败'})
                logger.error('压力传感器足部压力数据推流停止失败')
        else:
            emit('pressure_status', {'status': 'error', 'message': '设备管理器未初始化'})
            logger.error('设备管理器未初始化')
    except Exception as e:
        logger.error(f'停止压力传感器数据推流失败: {e}')
        emit('pressure_status', {'status': 'error', 'message': f'停止失败: {str(e)}'})

# 重复的事件处理器已删除，使用前面定义的版本

if __name__ == '__main__':
    """主入口点 - 用于直接运行和PyInstaller打包"""
    try:
        # 初始化应用
        init_app()
        
        # 启动服务器
        logger.info("启动身体平衡评估系统后端服务...")
        logger.info("服务器地址: http://localhost:5000")
        
        socketio.run(
            app, 
            host='0.0.0.0', 
            port=5000, 
            debug=False,
            allow_unsafe_werkzeug=True
        )
        
    except KeyboardInterrupt:
        logger.info("用户中断，正在关闭服务器...")
    except Exception as e:
        logger.error(f"启动失败: {e}")
        input("按回车键退出...")
        sys.exit(1)