import json
import random
from datetime import datetime
from time import mktime

from parse_rss_feeds import parse_rss_feeds


class Column(object):
    def __init__(self, title, urls):
        self.title = title
        self.urls = urls
        self.limit = None
        self.sort_order = None
        self.entries = None
        self.tag_filter = None

    def set_tag_filter(self, tag_filter):
        self.tag_filter = tag_filter

    def set_sort_order(self, sort_order):
        self.sort_order = sort_order

    def set_limit(self, limit):
        self.limit = limit

    def set_entries(self, entries):
        self.entries = entries

    def set_title(self, title):
        self.title = title

    def _sort_by_order(self):
        entrylist = list(self.entries.items())
        if self.sort_order.lower() == "reverse":
            entrylist.reverse()
            self.entries = dict(entrylist)
            return
        if self.sort_order.lower() == "random":
            random.shuffle(entrylist)
            self.entries = dict(entrylist)
            return
        if self.sort_order.lower() == "chronological":
            entrylist.sort(
                key=lambda x: datetime.fromtimestamp(mktime(x[1][1]))
            )
            self.entries = dict(entrylist)
            return
        if self.sort_order.lower() == "reverse-chronological":
            entrylist.sort(
                key=lambda x: datetime.fromtimestamp(mktime(x[1][1]))
            )
            entrylist.reverse()
            self.entries = dict(entrylist)
            return

    def _enforce_limit(self):
        while len(self.entries) > self.limit:
            self.entries.popitem()

    def load_content_from_feeds(self):
        entries = parse_rss_feeds(self.urls, self.tag_filter)
        self.entries = entries
        if self.sort_order:
            self._sort_by_order()
        if self.limit:
            self._enforce_limit()