from .db_utils import URL_DB_Writer
from .url_utils import process_article
from .logger import get_logger
logger = get_logger()

class UpdateErrorURLs():
    def __init__(self, db_connect_info, redis_connect_info, num_urls) -> None:
        self.num_urls = num_urls
        self.db_connect_info = db_connect_info
        self.redis_connect_info = redis_connect_info
        self.db_writer = URL_DB_Writer(db_connect_info, redis_connect_info)

    def update_error_urls_status(self):
        try:
            logger.info("Starting updating status to URLs with error, limit #URLs: {}".format(self.num_urls))
            # List of URLs with status 'error'
            list_ids_and_urls = self.db_writer._get_error_urls(self.num_urls)
            # Current status
            current_status = "error"
            # Dict: status -> IDs to update to new status
            dict_status_ids, dict_status_urls = {}, {}

            # Get list of (pattern, priority, status) tuples to override status if required
            list_pattern_status_tuple = self.db_writer._get_pattern_status_list()
            # Sort pattern tuples by priority
            list_pattern_status_tuple.sort(key=lambda tup: tup[1], reverse=True)

            flush_every, flush_current = 20, 0
            # Iterate URLs
            for (id, url) in list_ids_and_urls:
                # Get status
                url_canonical, article_elements, new_status = process_article(url, list_pattern_status_tuple)
                # Different? Update
                if (current_status != new_status):
                    # Extend array
                    dict_status_ids[new_status] = dict_status_ids.get(new_status, []) + [id]
                    # Debugging dict
                    dict_status_urls[new_status] = dict_status_urls.get(new_status, []) + [url]
                    # +1 processed
                    flush_current += 1

                # Flush batch?
                if (flush_every == flush_current):
                    logger.info("Updating status to URLs with error: {}".format(dict_status_urls))
                    # Update DB
                    self.db_writer._update_urls_status(dict_status_ids)
                    # Reset
                    flush_current = 0
                    dict_status_ids, dict_status_urls = {}, {}

            # Flush remaining batch
            if (flush_current > 0):
                logger.info("Updating status to URLs with error: {}".format(dict_status_urls))
                # Update DB
                self.db_writer._update_urls_status(dict_status_ids)
                # Reset
                flush_current = 0
                dict_status_ids, dict_status_urls = {}, {}
            
            logger.info("Finished updating status to URLs with error")
        except Exception as e:
            logger.warning("Exception in UpdateErrorURLs.run(): {}".format(str(e)))