#!/usr/bin/env python
"""Usage: bupa <filename>

Options:
  -h --help     Show this screen.
"""
from jinja2 import Environment, FileSystemLoader
import glob, yaml, docopt

from docutils import core
from docutils.writers.html4css1 import Writer

def reST_to_html(s):
	return core.publish_parts(s, writer_name='html4css1')['html_body']

def filename_to_id(file_name):
	return int(file_name.split('/')[-1].
	                     split('-')[0].
	                     split('.')[0])

class Page(object):
	def __init__(self, page_dict):
		self.id = None
		self.title = page_dict['title']
		self.header = page_dict['header']
		self.date = page_dict['date']
		self.author = page_dict['author']
		if 'author_link' in page_dict:
			self.author_link = page_dict['author_link']
		self.body = page_dict['body'][0]

def parse(filename):
	with open(filename, 'r') as file:
		data = file.read()

	frontmatter, *body = data.split('\n\n', 1)
	frontmatter = frontmatter.partition('\n')[2]
	frontmatter = yaml.load(frontmatter)

	page_dict = frontmatter.copy()
	page_dict['body'] = body
	if not 'header' in page_dict:
		page_dict['header'] = page_dict['title']

	page = Page(page_dict)
	return page

	with open('build/journal.html', 'w') as file:
		file.write(template.render(entries=entries, title='~/journal', header='The lost journal'))

def build_page(env, templ_name, pagename):
	template = env.get_template(templ_name)

	page = parse('src/'+pagename+'.rst')
	page.body = reST_to_html(page.body)
	page.article_id = pagename

	with open('build/'+pagename+'.html', 'w') as file:
		file.write(template.render(page=page, title=page.title, header=page.header))

def main():
	arguments = docopt.docopt(__doc__)
	env = Environment(loader=FileSystemLoader('src/templates'))

	if '<filename>' in arguments:
		file = arguments['<filename>'].split('/')[-1]
	else:
		exit(2)

	if file == 'index.html':
		build_page(env, 'page.html', 'index')

if __name__ == '__main__':
	main()