#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
身体平衡评估系统 - 后端服务器 (简化版本)
专门用于PyInstaller打包的版本，移除了SocketIO功能
"""

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
import cv2
import configparser

# 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'

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

# 读取RTSP配置
config = configparser.ConfigParser()
config_path = os.path.join(os.path.dirname(__file__), 'config.ini')
if not os.path.exists(config_path):
    # 如果当前目录没有config.ini，尝试上级目录
    config_path = os.path.join(os.path.dirname(__file__), '..', 'config.ini')
config.read(config_path, encoding='utf-8')

# 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:
        # 初始化数据库管理器
        db_path = os.path.join(os.path.dirname(__file__), 'data', 'body_balance.db')
        os.makedirs(os.path.dirname(db_path), exist_ok=True)
        db_manager = DatabaseManager(db_path)
        # 初始化数据库表结构
        db_manager.init_database()
        logger.info("数据库管理器初始化成功")
        
        # 初始化设备管理器
        device_manager = DeviceManager()
        logger.info("设备管理器初始化成功")
        
        # 初始化视频流管理器
        video_stream_manager = VideoStreamManager()
        logger.info("视频流管理器初始化成功")
        
        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

@app.route('/health', methods=['GET'])
def health_check():
    """健康检查接口"""
    return jsonify({
        'status': 'ok',
        'timestamp': datetime.now().isoformat(),
        'message': '身体平衡评估系统后端服务正常运行'
    })

@app.route('/api/health', methods=['GET'])
def api_health_check():
    """API健康检查接口"""
    return jsonify({
        'status': 'success',
        'data': {
            'service': '身体平衡评估系统',
            'version': '1.0.0',
            'timestamp': datetime.now().isoformat()
        }
    })

@app.route('/api/auth/login', methods=['POST'])
def login():
    """用户登录接口"""
    try:
        data = flask_request.get_json()
        username = data.get('username')
        password = data.get('password')
        
        if not username or not password:
            return jsonify({
                'status': 'error',
                'message': '用户名和密码不能为空'
            }), 400
        
        # 验证用户凭据
        user = db_manager.authenticate_user(username, password)
        if user:
            return jsonify({
                'status': 'success',
                'message': '登录成功',
                'data': {
                    'user_id': user['id'],
                    'username': user['username'],
                    'role': user['role'],
                    'token': 'simple_token_' + str(user['id'])
                }
            })
        else:
            return jsonify({
                'status': 'error',
                'message': '用户名或密码错误'
            }), 401
            
    except Exception as e:
        logger.error(f"登录失败: {e}")
        return jsonify({'status': 'error', 'message': '登录失败'}), 500

@app.route('/api/auth/register', methods=['POST'])
def register():
    """用户注册接口"""
    try:
        data = flask_request.get_json()
        username = data.get('username')
        password = data.get('password')
        email = data.get('email', '')
        
        if not username or not password:
            return jsonify({
                'status': 'error',
                'message': '用户名和密码不能为空'
            }), 400
        
        # 创建用户
        user_id = db_manager.create_user(username, password, email)
        if user_id:
            return jsonify({
                'status': 'success',
                'message': '注册成功',
                'data': {'user_id': user_id}
            })
        else:
            return jsonify({
                'status': 'error',
                'message': '注册失败，用户名可能已存在'
            }), 400
            
    except Exception as e:
        logger.error(f"注册失败: {e}")
        return jsonify({'status': 'error', 'message': '注册失败'}), 500

if __name__ == '__main__':
    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器...")
        logger.info("服务器地址: http://localhost:5000")
        
        app.run(
            host='0.0.0.0',
            port=5000,
            debug=False,
            threaded=True
        )
        
    except KeyboardInterrupt:
        logger.info("服务器已停止")
    except Exception as e:
        logger.error(f"服务器启动失败: {e}")
        sys.exit(1)