import whois
from concurrent.futures import ThreadPoolExecutor
import logging,os
import argparse
from . import db

class SearchDomain(object):
    """search avaliable domain and save result"""

    def __init__(self, params: dict, debug=False, export_all=True, log_callback=None):
        '''
        初始化
        debug 调试模式
        export_all 是否导出所有域名，默认导出可用域名
        log_callback 日志回调函数，用于GUI模式下显示日志
        return:
        '''
        super(SearchDomain, self).__init__()
        self.params = params
        self.export_all=export_all
        self.input=params["input"]
        self.output=params["output"]
        self.log_callback = log_callback
        self._output_file_checked = False  # 标记输出文件是否已检查
        
        # 获取当前模块的日志记录器
        self.logger = logging.getLogger(__name__)
        
        # 配置日志系统
        if log_callback:
            # 如果有日志回调函数，创建自定义处理器
            # 创建自定义处理器，将日志输出到回调函数
            class CallbackHandler(logging.Handler):
                def __init__(self, callback):
                    super().__init__()
                    self.callback = callback
                
                def emit(self, record):
                    msg = self.format(record)
                    if self.callback:
                        self.callback(msg)
            
            self.logger.setLevel(logging.INFO)
            
            # 检查是否已经添加了回调处理器，避免重复添加
            has_callback_handler = any(isinstance(h, CallbackHandler) for h in self.logger.handlers)
            if not has_callback_handler:
                callback_handler = CallbackHandler(log_callback)
                callback_handler.setLevel(logging.INFO)
                formatter = logging.Formatter('%(message)s')
                callback_handler.setFormatter(formatter)
                self.logger.addHandler(callback_handler)
        elif debug == True:
            logging.basicConfig(level=logging.DEBUG, format='%(message)s', force=True)
        else:
            logging.basicConfig(level=logging.INFO, format='%(message)s', force=True)

    def crawl(self, domain: str, index:int) -> None:
        '''
        检测域名是否可用
        :params domain 域名:
        :return true or false'''
        res = False
        try:
            whi = whois.whois(domain)
            res = False
            self.logger.info(str(index) + ": searching domain:"+ domain + " is unavaliable.")
        except Exception as e:
            error_str = str(e)
            # 检查是否是域名未注册的错误
            if "No match" in error_str or "No match for" in error_str:
                res = True
                self.logger.info(str(index) + ": searching domain:"+ domain +" is avaliable.")
            else:
                res = False
                self.logger.error(f"Error checking {domain}: {error_str}")
        if self.export_all:
            self.saveRes(domain, res)
        else:
            if res:
                self.saveRes(domain, res)

    def saveRes(self, domain: str, res: bool):
        """ save result to file """
        # db.Mysql().save()
        output_path = os.path.join(self.params["app_path"], self.output)
        # 检查输出文件是否存在，不存在则创建并警告（只检查一次）
        if not self._output_file_checked:
            if not os.path.exists(output_path):
                # 确保目录存在
                dir_path = os.path.dirname(output_path)
                if dir_path and not os.path.exists(dir_path):
                    os.makedirs(dir_path, exist_ok=True)
                # 创建文件
                with open(output_path, 'w', encoding='utf-8') as f:
                    pass
                self.logger.warning(f"警告：输出文件不存在，已创建: {output_path}")
            self._output_file_checked = True
        db.File().save(output_path, domain + "    " + str(res))

    def run(self):
        '''begin search domain'''
        # 支持 input 为完整路径或相对路径
        input_path = self.input if os.path.isabs(self.input) else os.path.join(self.params["app_path"], self.input)
        with open(input_path, "r", encoding="utf8", errors="ignore") as file:
            with ThreadPoolExecutor(max_workers=5) as pool:
                index = 0
                futures = []
                for line in file.readlines():
                    domain = line.strip()
                    if domain:  # 跳过空行
                        index = index + 1
                        future = pool.submit(self.crawl, domain, index)
                        futures.append(future)
                # 等待所有任务完成
                for future in futures:
                    future.result()

if __name__ == '__main__':
    sd = SearchDomain()
    sd.run()