import datetime
import sys
import os
os.chdir('/www/server/panel/')
sys.path.insert(0, "class/")
import public
# import time

# start_time = time.time()

# 检查是否提供了日志文件路径作为命令行参数
if len(sys.argv) != 2:
    print("Usage: python log_task_analyzer.py <log_file_path>")
    sys.exit(1)

# 从命令行参数中获取日志文件路径
log_file = sys.argv[1]

# 记录任务执行状态的文件路径
task_log = "/tmp/task_log.log"

# 设置要读取的最大字节数（1000KB = 1024 * 1000 字节）
MAX_BYTES_TO_READ = 1024 * 1000  # 1000KB

# 反向读取日志文件的最后1000KB内容
try:
    with open(log_file, 'rb') as f:
        f.seek(0, os.SEEK_END)  # 定位到文件末尾
        file_size = f.tell()  # 获取文件总大小
        offset = max(file_size - MAX_BYTES_TO_READ, 0)  # 计算读取偏移量
        f.seek(offset)  # 定位到偏移量处
        data = f.read(MAX_BYTES_TO_READ).decode('utf-8', errors='ignore')  # 读取数据并解码为字符串
        lines = data.splitlines()[::-1]  # 将数据分割为行并反转顺序
except FileNotFoundError:
    print(f"Log file {log_file} not found.")
    sys.exit(1)

# 初始化变量
found_successful = False
found_error_before_next_successful = False

# 要查找的错误模式
error_patterns = ["错误", "失败", "command not found", "Unknown error", "不存在", 
                  "请先到软件商店安装日志清理工具", "failed to run command", 
                  "No such file or directory", "not supported or disabled in libcurl"]


# 迭代检查日志内容
for line in lines:
    if "Successful" in line:
        if found_successful:
            # 如果找到第二个 "Successful"，停止搜索
            break
        else:
            # 找到第一个 "Successful"
            found_successful = True
    elif any(error_pattern in line for error_pattern in error_patterns) and found_successful:
        # 如果在找到 "Successful" 后发现任何错误模式，则标记错误
        found_error_before_next_successful = True
        break

# 根据检查结果记录日志
with open(task_log, 'a') as f:
    current_time = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
    # 提取 echo 值作为日志文件名的前缀
    echo_value = log_file.split('/')[-1].split('.')[0]
    crontab_data_list = public.M('crontab').where('echo=?', (echo_value,)).select()    
    if found_successful and found_error_before_next_successful:
        if crontab_data_list:
            public.M('crontab').where('echo=?', (echo_value,)).setField('result', 0)
        # f.write(f"{current_time} - 最后一次定时任务执行发现错误，执行失败\n")
    else:
        if crontab_data_list:
            public.M('crontab').where('echo=?', (echo_value,)).setField('result', 1)
        # f.write(f"{current_time} - 最后一次定时任务执行成功\n")

# end_time = time.time()
# print(f"Execution time: {end_time - start_time} seconds")