#!/usr/bin/env python3

import sys
from functools import partial as p
from ipo import ipo, write, starstarmap

from page import blog_page_metadata


BASE_URL = "https://www.braindeaddev.com/P5t7oFqPF7oEX"

DOC_TEMPLATE = """<?xml version="1.0"?>
<rss version="2.0">
	<channel>
		<title>Midgard's blog</title>
		<description></description>
		<lastBuildDate>{last_updated}</lastBuildDate>
		<author>Midgard</author>
		<link>{url}</link>{0}
	</channel>
</rss>"""

ITEM_TEMPLATE = """
		<item>
			<title>{title}</title>
			<guid>{path}</guid>
			<pubDate>{published_rfc822}</pubDate>
			<link>{url}</link>
			<description>{summary}</description>
		</item>"""
			# <category>{category}</category>


def iso8601_to_rfc822(iso8601):
	# pylint: disable=invalid-name
	if not iso8601:
		return ""
	y, m, d = map(int, iso8601.split("-"))
	month = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"][m]
	return f"{d} {month} {y} 00:00:00 UTC"


def main():
	items = (
		ipo(sys.argv[1:]) |
		p(map, blog_page_metadata) |
		p(sorted, key=lambda x: x["published"]) |
		p(map, lambda x: {
			**x,
			"published_rfc822": iso8601_to_rfc822(x["published"]),
			"url": f"{BASE_URL}/{x['path']}"
		}) | list
	)

	last_date = items.data[-1]["published_rfc822"]

	(
		items |
		p(starstarmap, ITEM_TEMPLATE.format) |
		"".join |
		p(DOC_TEMPLATE.format, url=BASE_URL, last_updated=last_date) |
		write
	)

if __name__ == '__main__':
	main()