import feedparser
from simpledatabase import SimpleDatabase
import json
from datetime import datetime, date, timedelta
from backports.zoneinfo import ZoneInfo

def update():
	""" Update all feeds """
	feeds = open('feeds.txt').readlines()
	db = SimpleDatabase('feeds.json', 'feeds.log')

	tmp = {}
	tmp['feeds'] = {}
	tmp['all_posts_sorted'] = {}

	for x, feed in enumerate(feeds):
		parsed = feedparser.parse(feed)
		# print(parsed)
		x = str(x)

		tmp['feeds'][x] = {}
		tmp['feeds'][x]['title'] = parsed.feed.title
		tmp['feeds'][x]['link'] = parsed.feed.link
		tmp['feeds'][x]['rss'] = parsed.entries[0].title_detail.base
		tmp['feeds'][x]['description'] = parsed.feed.description
		
		for post in parsed.entries:
			year = post['published_parsed'][0]
			month = post['published_parsed'][1]
			day = post['published_parsed'][2]
			post_date = datetime(year, month, day, tzinfo=ZoneInfo("Europe/Amsterdam"))

			if not str(post_date) in tmp['all_posts_sorted']:
				tmp['all_posts_sorted'][str(post_date)] = []
				
			post['feed_details'] = {}
			post['feed_details']['title'] = parsed.feed.title
			post['feed_details']['link'] = parsed.feed.link
			post['feed_details']['rss'] = parsed.entries[0].title_detail.base
			post['feed_details']['description'] = parsed.feed.description
			tmp['all_posts_sorted'][str(post_date)].append(post)

	db.update(tmp)

def load():
	db = SimpleDatabase('feeds.json', 'feeds.log')
	return db

def latest(num):
	""" Collect the <num> latest published posts """
	db = load()

	dates = [key for key in db['all_posts_sorted'].keys()]
	dates.sort(reverse=True)
	request = []

	for date in dates:
		posts = db['all_posts_sorted'][date]
		for post in posts:
			if len(request) < int(num):
				request.append(post)
			else:
				break

	return request

def today():
	""" Collect posts from today """
	db = load()
	today = date.today()
	request = []

	for date_str, posts in db['all_posts_sorted'].items():
		year = int(date_str.split('-')[0]) 
		month = int(date_str.split('-')[1]) 
		day = int(date_str.split('-')[2])
		d = date(year, month, day)

		# Check if any posts are published today
		if d == today:
			for post in posts:
				request.append(post)

	return request

def past(days):
	""" Collect posts from a number of past <days> """
	db = load()
	point_in_the_past = date.today() - timedelta(int(days))
	request = []
	
	for date_str, posts in db['all_posts_sorted'].items():
		year = int(date_str.split('-')[0]) 
		month = int(date_str.split('-')[1]) 
		day = int(date_str.split('-')[2])
		d = date(year, month, day)

		if d > point_in_the_past:
			for post in posts:
				request.append(post)

	return request