import os

import flask_assets
from flask import Flask
from flask_flatpages import FlatPages
from werkzeug.utils import cached_property


class JournalFlatPages(FlatPages):
    def __init__(self, app=None, name=None):
        super(JournalFlatPages, self).__init__(app=app, name=name)

    @cached_property
    def _pages(self):
        """Forget all pages and nuke our own cache"""
        try:
            del self.__dict__['entries']
            del self.__dict__['tags']
        except KeyError:
            pass
        return super(JournalFlatPages, self)._pages

    @cached_property
    def entries(self):
        return sorted(self, key=lambda x: x.meta.get('date'))

    @cached_property
    def tags(self):
        tags = {}
        for entry in self.entries:
            if 'tags' not in entry.meta:
                tags.setdefault('untagged', set()).add(entry)
            else:
                for tag in entry.meta.get('tags'):
                    tags.setdefault(tag, set()).add(entry)

        return tags


app = Flask(__name__)

config = {
    'default': 'kyrias_website.config.BaseConfig',
    'development': 'kyrias_website.config.DevelopmentConfig',
}
config_name = os.getenv('WEBSITE_CONFIGURATION', 'development')
app.config.from_object(config[config_name])

assets = flask_assets.Environment(app)
css = flask_assets.Bundle('base.css', filters='cssmin', output='screen.css')
assets.register('css_all', css)

pages = FlatPages(app, 'pages')
journal = JournalFlatPages(app, 'journal')

import kyrias_website.views

if __name__ == '__main__':
    app.run(port=5000)