# utils/helpers.py
import os
import json
import time
import re

def create_response(success, message="", data=None, status_code=200):
    """创建标准化的API响应"""
    response = {"success": success}
    
    if message:
        response["message"] = message
        
    if data is not None:
        response["data"] = data
        
    return response, status_code

def validate_agent_access(agent_id, token=None):
    """验证Agent访问权限"""
    agent_path = os.path.join('agents', f"{agent_id}.json")
    
    if not os.path.exists(agent_path):
        return False, "Agent不存在"
    
    try:
        with open(agent_path, 'r', encoding='utf-8') as f:
            agent_config = json.load(f)
            
        # 如果没有提供令牌，则允许访问
        if not token:
            return True, agent_config
            
        # 验证令牌
        if "distributions" in agent_config:
            for dist in agent_config["distributions"]:
                if dist.get("token") == token:
                    # 检查是否过期
                    if dist.get("expires_at", 0) > 0 and dist.get("expires_at", 0) < time.time():
                        return False, "访问令牌已过期"
                    
                    # 更新使用计数
                    dist["usage_count"] = dist.get("usage_count", 0) + 1
                    
                    # 更新Agent使用统计
                    if "stats" not in agent_config:
                        agent_config["stats"] = {}
                    
                    agent_config["stats"]["usage_count"] = agent_config["stats"].get("usage_count", 0) + 1
                    agent_config["stats"]["last_used"] = int(time.time())
                    
                    # 保存更新后的配置
                    with open(agent_path, 'w', encoding='utf-8') as f:
                        json.dump(agent_config, f, ensure_ascii=False, indent=2)
                    
                    return True, agent_config
            
        return False, "访问令牌无效"
        
    except Exception as e:
        return False, f"验证过程出错: {str(e)}"

def extract_code_from_text(text):
    """从文本中提取代码块"""
    # 尝试找到Python代码块
    pattern = r'```(?:python)?\n([\s\S]*?)\n```'
    match = re.search(pattern, text)
    
    if match:
        return match.group(1)
    
    # 如果没有找到带有语言标记的代码块，尝试无语言标记的
    pattern = r'```\n([\s\S]*?)\n```'
    match = re.search(pattern, text)
    
    if match:
        return match.group(1)
    
    # 如果没有代码块标记，返回原始文本
    return text