import datetime
import html

import rfeed
from flask import render_template, request, flash, redirect, url_for, Response

from webapp.routes import *
from oshipka.webapp import app
from webapp.models import BlogPost

from flaskext.markdown import Markdown

Markdown(app,
         extensions=['markdown.extensions.fenced_code',
                     'markdown.extensions.codehilite',
                     'markdown.extensions.sane_lists',
                     'markdown.extensions.tables'],
         safe_mode='escape')


@app.template_filter('rawhtmlparse')
def rawhtmlparse(text):
    splitted = text.split("{% rawhtml %}")
    final_text = splitted[0]
    for idx, entry in enumerate(splitted[1:]):
        splitted_entry = entry.split("{% endrawhtml %}")
        unescaped_entry = html.unescape(splitted_entry[0])
        final_text = "{}{}{}".format(final_text, unescaped_entry, splitted_entry[1])
    return final_text


@app.route('/')
def home():
    per_page = request.args.get('per_page', 5)
    blog_post_pagination = BlogPost.query.order_by(BlogPost.created_dt.desc()).paginate(per_page=per_page,
                                                                                        error_out=False)
    return render_template("home.html", blog_post_pagination=blog_post_pagination)


@app.route('/index')
def index():
    blog_posts = BlogPost.query.order_by(BlogPost.created_dt.desc()).all()
    return render_template("index.html", blog_posts=blog_posts)


@app.route('/aboutme')
def aboutme():
    return render_template("aboutme.html")


@app.route('/blog_post/<filename>')
def blog_post_filename(filename):
    blog_post = BlogPost.query.filter_by(filename=filename).first()
    if not blog_post:
        flash("Blog post doesn't exist")
        return redirect(url_for('index'))
    return render_template("blog_post/get.html", instance=blog_post,
                           title="PiSquared Blog - {}".format(blog_post.title))


@app.route('/rss.xml')
def rss():
    feed_items = []
    for blog_post in BlogPost.query.order_by(BlogPost.created_dt.desc()).all():
        d = blog_post.created_dt
        pub_date = datetime.datetime(int(d[0:4]), int(d[4:6]), int(d[6:8]))
        item = rfeed.Item(
            title=blog_post.title,
            link="https://blog.pi2.dev/blog_post/{}".format(blog_post.filename),
            description="{}...".format(blog_post.body[:300]),
            author="Daniel",
            guid=rfeed.Guid("https://blog.pi2.dev/blog_post/{}".format(blog_post.filename)),
            pubDate=pub_date)
        feed_items.append(item)

    feed = rfeed.Feed(
        title="Pi2-Blog posts",
        link="https://blog.pi2.dev/rss.xml",
        description="Pisquared Blog - Recently updated posts",
        language="en-US",
        lastBuildDate=datetime.datetime.now(),
        items=feed_items)
    return Response(feed.rss(), mimetype='text/xml')