#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import logging
import re
import os
from typing import Any, List, Optional, Callable, Dict
from urllib.parse import urlparse
import ipaddress

logger = logging.getLogger(__name__)

class ValidationUtils:
    """验证工具类"""
    
    @staticmethod
    def is_valid_email(email: str) -> bool:
        """验证邮箱格式"""
        try:
            pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
            result = bool(re.match(pattern, email))
            logger.debug(f"邮箱验证: {email} -> {result}")
            return result
        except Exception as e:
            logger.error(f"验证邮箱时出错: {str(e)}", exc_info=True)
            return False
    
    @staticmethod
    def is_valid_url(url: str) -> bool:
        """验证URL格式"""
        try:
            result = urlparse(url)
            is_valid = all([result.scheme, result.netloc])
            logger.debug(f"URL验证: {url} -> {is_valid}")
            return is_valid
        except Exception as e:
            logger.error(f"验证URL时出错: {str(e)}", exc_info=True)
            return False
    
    @staticmethod
    def is_valid_ip(ip: str) -> bool:
        """验证IP地址格式"""
        try:
            ipaddress.ip_address(ip)
            logger.debug(f"IP地址验证: {ip} -> True")
            return True
        except ValueError:
            logger.debug(f"IP地址验证: {ip} -> False")
            return False
        except Exception as e:
            logger.error(f"验证IP地址时出错: {str(e)}", exc_info=True)
            return False
    
    @staticmethod
    def is_valid_port(port: int) -> bool:
        """验证端口号"""
        try:
            is_valid = 1 <= port <= 65535
            logger.debug(f"端口验证: {port} -> {is_valid}")
            return is_valid
        except Exception as e:
            logger.error(f"验证端口时出错: {str(e)}", exc_info=True)
            return False
    
    @staticmethod
    def validate_string(value: Any, min_length: int = 0, max_length: int = None, 
                       pattern: str = None) -> bool:
        """验证字符串"""
        try:
            if not isinstance(value, str):
                logger.debug(f"字符串验证失败: 不是字符串类型")
                return False
            
            if len(value) < min_length:
                logger.debug(f"字符串验证失败: 长度小于 {min_length}")
                return False
            
            if max_length and len(value) > max_length:
                logger.debug(f"字符串验证失败: 长度大于 {max_length}")
                return False
            
            if pattern and not re.match(pattern, value):
                logger.debug(f"字符串验证失败: 不匹配模式 {pattern}")
                return False
            
            logger.debug(f"字符串验证通过: 长度 {len(value)}")
            return True
            
        except Exception as e:
            logger.error(f"验证字符串时出错: {str(e)}", exc_info=True)
            return False
    
    @staticmethod
    def validate_number(value: Any, min_value: float = None, max_value: float = None) -> bool:
        """验证数字"""
        try:
            if not isinstance(value, (int, float)):
                # 尝试转换
                try:
                    value = float(value)
                except (ValueError, TypeError):
                    logger.debug(f"数字验证失败: 无法转换为数字")
                    return False
            
            if min_value is not None and value < min_value:
                logger.debug(f"数字验证失败: 值小于 {min_value}")
                return False
            
            if max_value is not None and value > max_value:
                logger.debug(f"数字验证失败: 值大于 {max_value}")
                return False
            
            logger.debug(f"数字验证通过: {value}")
            return True
            
        except Exception as e:
            logger.error(f"验证数字时出错: {str(e)}", exc_info=True)
            return False
    
    @staticmethod
    def validate_list(value: Any, min_length: int = 0, max_length: int = None,
                     item_validator: Callable = None) -> bool:
        """验证列表"""
        try:
            if not isinstance(value, list):
                logger.debug(f"列表验证失败: 不是列表类型")
                return False
            
            if len(value) < min_length:
                logger.debug(f"列表验证失败: 长度小于 {min_length}")
                return False
            
            if max_length and len(value) > max_length:
                logger.debug(f"列表验证失败: 长度大于 {max_length}")
                return False
            
            if item_validator:
                for i, item in enumerate(value):
                    if not item_validator(item):
                        logger.debug(f"列表验证失败: 第 {i} 项验证失败")
                        return False
            
            logger.debug(f"列表验证通过: 长度 {len(value)}")
            return True
            
        except Exception as e:
            logger.error(f"验证列表时出错: {str(e)}", exc_info=True)
            return False
    
    @staticmethod
    def validate_dict(value: Any, required_keys: List[str] = None,
                     key_validators: Dict[str, Callable] = None) -> bool:
        """验证字典"""
        try:
            if not isinstance(value, dict):
                logger.debug(f"字典验证失败: 不是字典类型")
                return False
            
            # 检查必需键
            if required_keys:
                for key in required_keys:
                    if key not in value:
                        logger.debug(f"字典验证失败: 缺少必需键 {key}")
                        return False
            
            # 检查键值验证器
            if key_validators:
                for key, validator in key_validators.items():
                    if key in value and not validator(value[key]):
                        logger.debug(f"字典验证失败: 键 {key} 的值验证失败")
                        return False
            
            logger.debug(f"字典验证通过: 键数 {len(value)}")
            return True
            
        except Exception as e:
            logger.error(f"验证字典时出错: {str(e)}", exc_info=True)
            return False
    
    @staticmethod
    def validate_file_path(file_path: str, check_exists: bool = True, 
                          check_readable: bool = False, check_writable: bool = False) -> bool:
        """验证文件路径"""
        try:
            from pathlib import Path
            
            path = Path(file_path)
            
            if check_exists and not path.exists():
                logger.debug(f"文件路径验证失败: 文件不存在")
                return False
            
            if check_readable and not os.access(path, os.R_OK):
                logger.debug(f"文件路径验证失败: 文件不可读")
                return False
            
            if check_writable and not os.access(path, os.W_OK):
                logger.debug(f"文件路径验证失败: 文件不可写")
                return False
            
            logger.debug(f"文件路径验证通过: {file_path}")
            return True
            
        except Exception as e:
            logger.error(f"验证文件路径时出错: {str(e)}", exc_info=True)
            return False