#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
日志管理模块
提供统一的日志输出功能，支持控制台和文件输出
"""

import os
from datetime import datetime
from pathlib import Path


class Logger:
    """日志管理器"""

    # 颜色定义
    RED = '\033[0;31m'
    GREEN = '\033[0;32m'
    YELLOW = '\033[1;33m'
    BLUE = '\033[0;34m'
    NC = '\033[0m'  # No Color

    # 日志配置
    _log_file = None
    _max_size = 10485760  # 10MB
    _initialized = False

    @classmethod
    def init(cls, log_file=None, max_size=None):
        """
        初始化日志配置

        参数：
            log_file: 日志文件路径
            max_size: 日志文件最大大小（字节）
        """
        if log_file:
            cls._log_file = Path(log_file)
            # 确保日志目录存在
            cls._log_file.parent.mkdir(parents=True, exist_ok=True)

        if max_size:
            cls._max_size = max_size

        cls._initialized = True

    @classmethod
    def _rotate_log(cls):
        """日志轮转：如果日志文件超过最大大小，进行轮转"""
        if not cls._log_file or not cls._log_file.exists():
            return

        if cls._log_file.stat().st_size >= cls._max_size:
            # 轮转日志文件
            backup_file = cls._log_file.with_suffix('.log.1')
            if backup_file.exists():
                backup_file.unlink()
            cls._log_file.rename(backup_file)

    @classmethod
    def _write_log(cls, level, message):
        """写入日志到控制台和文件"""
        timestamp = datetime.now().strftime('%Y-%m-%d %H:%M:%S')

        # 控制台输出（带颜色）
        color_map = {
            'INFO': cls.GREEN,
            'ERROR': cls.RED,
            'WARN': cls.YELLOW,
            'DEBUG': cls.BLUE
        }
        color = color_map.get(level, cls.NC)
        print(f"{color}[{level}]{cls.NC} {timestamp} - {message}")

        # 文件输出（不带颜色）
        if cls._log_file:
            cls._rotate_log()
            log_line = f"[{level}] {timestamp} - {message}\n"
            with open(cls._log_file, 'a', encoding='utf-8') as f:
                f.write(log_line)

    @classmethod
    def info(cls, message):
        """输出信息日志"""
        cls._write_log('INFO', message)

    @classmethod
    def error(cls, message):
        """输出错误日志"""
        cls._write_log('ERROR', message)

    @classmethod
    def warn(cls, message):
        """输出警告日志"""
        cls._write_log('WARN', message)

    @classmethod
    def debug(cls, message):
        """输出调试日志"""
        cls._write_log('DEBUG', message)

    @staticmethod
    def separator():
        """输出分隔线"""
        print("=" * 60)