# Define here the models for your spider middleware
#
# See documentation in:
# https://docs.scrapy.org/en/latest/topics/spider-middleware.html

from scrapy import signals

# useful for handling different item types with a single interface
from itemadapter import is_item, ItemAdapter
from CnkiSpider.file_util import FileUtil
from CnkiSpider.commonUtils import SpiderTypeEnum
import logging
from CnkiSpider.proxy import ApeProxyManager


class CnkispiderSpiderMiddleware:
    # Not all methods need to be defined. If a method is not defined,
    # scrapy acts as if the spider middleware does not modify the
    # passed objects.

    @classmethod
    def from_crawler(cls, crawler):
        # This method is used by Scrapy to create your spiders.
        s = cls()
        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
        return s

    def process_spider_input(self, response, spider):
        # Called for each response that goes through the spider
        # middleware and into the spider.

        # Should return None or raise an exception.
        return None

    def process_spider_output(self, response, result, spider):
        # Called with the results returned from the Spider, after
        # it has processed the response.

        # Must return an iterable of Request, or item objects.
        for i in result:
            yield i

    def process_spider_exception(self, response, exception, spider):
        # Called when a spider or process_spider_input() method
        # (from other spider middleware) raises an exception.

        # Should return either None or an iterable of Request or item objects.
        pass

    def process_start_requests(self, start_requests, spider):
        # Called with the start requests of the spider, and works
        # similarly to the process_spider_output() method, except
        # that it doesn’t have a response associated.

        # Must return only requests (not items).
        for r in start_requests:
            yield r

    def spider_opened(self, spider):
        spider.logger.info('Spider opened: %s' % spider.name)


class CnkispiderDownloaderMiddleware:
    # Not all methods need to be defined. If a method is not defined,
    # scrapy acts as if the downloader middleware does not modify the
    # passed objects.

    @classmethod
    def from_crawler(cls, crawler):
        # This method is used by Scrapy to create your spiders.
        s = cls()
        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
        return s

    def process_request(self, request, spider):
        # Called for each request that goes through the downloader
        # middleware.

        # Must either:
        # - return None: continue processing this request
        # - or return a Response object
        # - or return a Request object
        # - or raise IgnoreRequest: process_exception() methods of
        #   installed downloader middleware will be called
        # request.meta["proxy"] = ProxyManager.getProxyString()
        # request.headers["Proxy-Authorization"] = ProxyManager.proxyAuth
        return None

    def process_response(self, request, response, spider):
        # Called with the response returned from the downloader.

        # Must either;
        # - return a Response object
        # - return a Request object
        # - or raise IgnoreRequest
        return response

    # def process_exception(self, request, exception, spider):
    #     # Called when a download handler or a process_request()
    #     # (from other downloader middleware) raises an exception.
    #
    #     # Must either:
    #     # - return None: continue processing this exception
    #     # - return a Response object: stops process_exception() chain
    #     # - return a Request object: stops process_exception() chain
    #     pass

    #
    def process_exception(self, request, exception, spider):
        '''
        全局请求异常处理, 这里暂时没用
        :param request:
        :param exception:
        :param spider:
        :return:
        '''
    #     key = request.cb_kwargs
    #     print(request)
    #     print('全局异常拦截！！！\n')
    #     print('异常', exception)
    #     print(type(exception))
    #     if spider.name == SpiderTypeEnum.PATENT.value:
    #         # print(key)
    #         if key['requestType'] == 'PatentGetFirstPage':
    #             self.markDayError(type=SpiderTypeEnum.PATENT.value, code=key['code'], date=key['date'])
    #         elif key['requestType'] == 'PatentGetLinks':
    #             self.markPageError(type=SpiderTypeEnum.PATENT.value, code=key['code'], date=key['date'], pagenum=key['pagenum'])
    #         elif key['requestType'] == "patentGetContent":
    #             self.markLinkError(type=SpiderTypeEnum.PATENT.value, url=key['url'])
    #         else:
    #             print('这传的什么jb玩意？')
    #         # self.markFirstError(key['code'], key['date'], pagenum)
    #     elif 'error' in spider.name:
    #         if 'pagenum' in key:
    #             pagenum = key['pagenum']
    #         else:
    #             pagenum = 0
    #         self.markSecondError(key['code'], key['date'], pagenum)
        return request
    #
    # def markLinkError(self, url, type):
    #     with open(FileUtil.errorLinkDir + type + 'Error.txt', 'a', encoding='utf-8') as file:
    #         file.write(url + '\n')
    #
    # def markSecondError(self, code, date, pagenum):
    #     if pagenum == 0:
    #         with open('error/erday.txt', 'a', encoding='utf-8') as f:
    #             f.write(code + '&' + date + '\n')
    #     else:
    #         with open('error/erpage.txt', 'a', encoding='utf-8') as f:
    #             f.write(code + '&' + date + '&' + str(pagenum) + '\n')
    #
    # def markFirstError(self, code, date, pagenum):
    #     if pagenum == 0:
    #         with open('error/errorday_' + date + '.txt', 'a', encoding='utf-8') as f:
    #             f.write(code + '&' + date + '\n')
    #     else:
    #         with open('error/errorpage_' + date + 'txt', 'a', encoding='utf-8') as f:
    #             f.write(code + '&' + date + '&' + str(pagenum) + '\n')
    #
    # def easyErrorRecoder(self, url):
    #     with open('error/EasyErrorRecorder.txt', 'a', encoding='utf-8') as file:
    #         file.write(url + '\n')
    #
    # def markDayError(self, type, code, date):
    #     with open(FileUtil.errorDayDir + type +  '.txt', 'a', encoding='utf-8') as f:
    #         f.write(code + '&' + date + '\n')
    #
    # def markPageError(self, type, code, date, pagenum):
    #     with open(FileUtil.errorPageDir + type +  '.txt', 'a', encoding='utf-8') as f:
    #         f.write(code + '&' + date + '&' + str(pagenum) + '\n')
    #



    def spider_opened(self, spider):
        spider.logger.info('Spider opened: %s' % spider.name)