import feedparser
from simpledatabase import SimpleDatabase
import json
from datetime import date, timedelta
import pypandoc
import re

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)
		if parsed:
			# print(f'Adding: { parsed.feed.title } ({ parsed.feed.link })')
			x = str(x)

			tmp['feeds'][x] = {}
			if parsed.feed.title:
				tmp['feeds'][x]['title'] = parsed.feed.title
			else:
				tmp['feeds'][x]['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 = date(year, month, day)

				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)
	feed = []

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

	return feed

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

	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:
				feed.append(post)

	return feed

def past(days):
	""" Collect posts from a number of past <days> """
	db = load()
	point_in_the_past = date.today() - timedelta(int(days))
	feed = []
	
	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:
				feed.append(post)

	feed.reverse()
	return feed

def md(feed):
	md_feed = ''
	for post in feed:
		
		post_content = pypandoc.convert_text(
			post['summary'], 'md', format='html'
		)
		if post['links']:
			for link in post['links']:
				if link['rel'] == 'enclosure':
					if 'pdf' in link['type']:
						post_content += f"\n<{ link['href'] }>\n"
		post_content = re.sub(r'\n.*(-)\1{5,}.*\n', "", post_content) # remove all ------ lines from varia website posts

		len_link = len(post['link']) + 4
		len_line_dash = len_link * '-'
		len_line_space = len_link * ' '
		len_date_space = (len_link - len(post['published']) - 2 ) * ' '

		md_feed += "------------------------- \n\n"
		md_feed += f"# { post['title'] }" + "{.post_title} \n\n"
		md_feed += f"""|            |{ len_line_space }|
|-----------:|{ len_line_dash }|
| **posted** | { post['published'] }{ len_date_space } |
| **from**   | <{ post['link'] }> |

"""
		md_feed += f"{ post_content } \n\n"

	return md_feed