import json
import logging
import os

def read_last_n_lines(n):
    file_path = './cache/record.txt'
    try:
        with open(file_path, 'r') as file:
            lines = file.readlines()
            last_n_lines = [line.rstrip() for line in lines[-n:]]
            logging.info(f"read_last_n_lines:last_{n}_lines={last_n_lines} ")
            return last_n_lines
    except FileNotFoundError:
        logging.error(f"read_last_n_lines error: 文件未找到或路径错误。")
        print("文件未找到或路径错误。")
        return None



def generate_json_data(lines):
    # 生成包含时间信息的 JSON 数据
    data = {
        'time': {}
    }
    for i, line in enumerate(lines, 1):
        data['time'][str(i)] = line
    json_data = json.dumps(data)
    return json_data


def delete_file(file_path):
    try:
        # 检查文件是否存在
        if os.path.exists(file_path):
            # 确保文件已关闭
            with open(file_path, "a"):
                pass
            # 删除文件
            os.remove(file_path)
            logging.info(f"文件 {file_path} 已成功删除！")
            print(f"文件 {file_path} 已成功删除！")
        else:
            logging.info(f"文件 {file_path} 不存在，无法删除！")
            print(f"文件 {file_path} 不存在，无法删除！")
    except Exception as e:
        logging.error(f"delete_file error: {e}")
        print(f"删除文件时出现错误：{e}")


def write_error_devices(text, newline=True):
    filename = "./error_devices.txt"

    # 判断当前目录下是否有txt文件
    if not os.path.exists(filename):
        # 如果文件不存在，则新建并写入文本
        with open(filename, "w") as file:
            file.write(text)
    else:
        # 如果文件已存在，则在文件末尾追加文本，并换行（如果需要）
        with open(filename, "a") as file:
            if newline:
                file.write("\n" + text)
            else:
                file.write(text)