from functools import wraps
from flask import session, request, jsonify, redirect, url_for
import socket
import os
import yaml
import subprocess
import platform
from utils.logger_config import logger

# 配置上传文件夹
UPLOAD_FOLDER = 'uploads'
ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif', 'bmp', 'webp'}

# 登录验证装饰器
def login_required(f):
    @wraps(f)
    def decorated_function(*args, **kwargs):
        if 'logged_in' not in session:
            # 如果是 API 请求，返回 401
            if request.path.startswith('/api/'):
                return jsonify({'success': False, 'message': '未登录'}), 401
            # 如果是页面请求，跳转到登录页
            # 假设 auth blueprint 注册为 'auth'，登录路由名为 'login'
            return redirect(url_for('auth.login'))
        return f(*args, **kwargs)
    return decorated_function

def allowed_file(filename):
    """检查文件扩展名是否允许"""
    return '.' in filename and \
           filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS

def get_server_ip():
    """获取服务器的本地IP地址"""
    try:
        # 连接到一个远程地址（不会实际发送数据）
        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        s.connect(("8.8.8.8", 80))
        ip = s.getsockname()[0]
        s.close()
        return ip
    except Exception:
        # 如果获取失败，尝试其他方法
        try:
            hostname = socket.gethostname()
            ip = socket.gethostbyname(hostname)
            return ip
        except Exception:
            return "127.0.0.1"  # 回退到localhost

def load_led_config():
    """读取LED配置文件"""
    try:
        config_path = 'led_config.yaml'
        if os.path.exists(config_path):
            with open(config_path, 'r', encoding='utf-8') as f:
                config = yaml.safe_load(f)
                return config.get('segments', [])
        return []
    except Exception as e:
        logger.error(f"读取LED配置文件失败: {e}")
        return []

def ping_ip(ip):
    """
    Ping IP地址，返回是否通畅
    """
    if not ip:
        return False
        
    system_type = platform.system().lower()
    if system_type == 'windows':
        # -n 1: 发送1个包
        # -w 1000: 超时1000ms
        command = ['ping', '-n', '1', '-w', '1000', ip]
    else:
        # -c 1: 发送1个包
        # -W 1: 超时1s
        command = ['ping', '-c', '1', '-W', '1', ip]
    
    try:
        # 这里的 stdout/stderr=subprocess.DEVNULL 防止输出干扰日志
        return subprocess.call(command, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL) == 0
    except Exception as e:
        logger.error(f"Ping IP {ip} 异常: {e}")
        return False