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

# useful for handling different item types with a single interface
from loguru import logger
from scrapy import signals

from .settings import LOG_DIR


def setup_loguru_logger():
    LOG_DIR.mkdir(parents=True, exist_ok=True)

    logger.add(
        LOG_DIR / "scrapy_log_{time}.log",
        rotation="10 MB",  # Ротация файлов при достижении 10 MB
        # retention="10 days", # Удаление старых логов старше 10 дней
        compression="zip",  # Архивация логов
        format="{time} - {level} - {message}"
    )


class LogUrlMiddleware:

    @classmethod
    def from_crawler(cls, crawler):
        middleware = cls()
        crawler.signals.connect(middleware.spider_opened, signal=signals.spider_opened)
        crawler.signals.connect(middleware.spider_closed, signal=signals.spider_closed)
        return middleware

    def spider_opened(self, spider):
        setup_loguru_logger()
        logger.info(f"Spider opened: {spider.name}")

    def process_response(self, request, response, spider):
        # Декодируем URL из процентной кодировки
        decoded_url = unquote(request.url)
        # Логируем декодированный URL и код ответа
        logger.info(f"URL: {decoded_url} | Response Code: {response.status}")
        return response

    def process_exception(self, request, exception, spider):
        decoded_url = unquote(request.url)
        logger.error(f"Exception occurred for URL: {decoded_url} | Exception: {exception}")

    def spider_closed(self, spider):
        logger.info(f"Spider closed: {spider.name}")


class WikiApiCrawlerSpiderMiddleware:
    # 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.
        yield from result

    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).
        yield from start_requests

    def spider_opened(self, spider):
        spider.logger.info(f"Spider opened: {spider.name}")


class WikiApiCrawlerDownloaderMiddleware:
    # 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
        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 spider_opened(self, spider):
        spider.logger.info(f"Spider opened: {spider.name}")
