"""
日志工具
"""
import logging
import sys
from pathlib import Path
from typing import Optional
import json
from datetime import datetime


class ColoredFormatter(logging.Formatter):
    """彩色日志格式化器"""
    
    COLORS = {
        'DEBUG': '\033[36m',    # 青色
        'INFO': '\033[32m',     # 绿色
        'WARNING': '\033[33m',  # 黄色
        'ERROR': '\033[31m',    # 红色
        'CRITICAL': '\033[35m', # 紫色
    }
    RESET = '\033[0m'
    
    def format(self, record):
        log_color = self.COLORS.get(record.levelname, '')
        record.levelname = f"{log_color}{record.levelname}{self.RESET}"
        return super().format(record)


class JSONFormatter(logging.Formatter):
    """JSON日志格式化器"""
    
    def format(self, record):
        log_entry = {
            'timestamp': datetime.fromtimestamp(record.created).isoformat(),
            'level': record.levelname,
            'logger': record.name,
            'message': record.getMessage(),
            'module': record.module,
            'function': record.funcName,
            'line': record.lineno
        }
        
        if record.exc_info:
            log_entry['exception'] = self.formatException(record.exc_info)
        
        return json.dumps(log_entry, ensure_ascii=False)


def setup_logger(name: str, 
                 level: str = 'INFO',
                 log_file: Optional[str] = None,
                 format_type: str = 'colored',
                 max_bytes: int = 10 * 1024 * 1024,  # 10MB
                 backup_count: int = 5) -> logging.Logger:
    """设置日志器"""
    
    logger = logging.getLogger(name)
    logger.setLevel(getattr(logging, level.upper()))
    
    # 清除现有的处理器
    logger.handlers.clear()
    
    # 控制台处理器
    console_handler = logging.StreamHandler(sys.stdout)
    console_handler.setLevel(getattr(logging, level.upper()))
    
    if format_type == 'colored':
        formatter = ColoredFormatter(
            '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
        )
    elif format_type == 'json':
        formatter = JSONFormatter()
    else:
        formatter = logging.Formatter(
            '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
        )
    
    console_handler.setFormatter(formatter)
    logger.addHandler(console_handler)
    
    # 文件处理器
    if log_file:
        from logging.handlers import RotatingFileHandler
        
        # 确保日志目录存在
        log_path = Path(log_file)
        log_path.parent.mkdir(parents=True, exist_ok=True)
        
        file_handler = RotatingFileHandler(
            log_file, maxBytes=max_bytes, backupCount=backup_count
        )
        file_handler.setLevel(getattr(logging, level.upper()))
        file_handler.setFormatter(formatter)
        logger.addHandler(file_handler)
    
    return logger


def get_logger(name: str) -> logging.Logger:
    """获取日志器"""
    return logging.getLogger(name)


class LoggerMixin:
    """日志器混入类"""
    
    @property
    def logger(self) -> logging.Logger:
        """获取日志器"""
        if not hasattr(self, '_logger'):
            self._logger = get_logger(self.__class__.__name__)
        return self._logger


def log_function_call(func):
    """函数调用日志装饰器"""
    def wrapper(*args, **kwargs):
        logger = get_logger(func.__module__)
        logger.debug(f"调用函数: {func.__name__}, 参数: args={args}, kwargs={kwargs}")
        try:
            result = func(*args, **kwargs)
            logger.debug(f"函数 {func.__name__} 执行成功")
            return result
        except Exception as e:
            logger.error(f"函数 {func.__name__} 执行失败: {e}")
            raise
    return wrapper


def log_execution_time(func):
    """执行时间日志装饰器"""
    import time
    
    def wrapper(*args, **kwargs):
        logger = get_logger(func.__module__)
        start_time = time.time()
        logger.info(f"开始执行: {func.__name__}")
        
        try:
            result = func(*args, **kwargs)
            execution_time = time.time() - start_time
            logger.info(f"执行完成: {func.__name__}, 耗时: {execution_time:.2f}秒")
            return result
        except Exception as e:
            execution_time = time.time() - start_time
            logger.error(f"执行失败: {func.__name__}, 耗时: {execution_time:.2f}秒, 错误: {e}")
            raise
    
    return wrapper