import yaml, pathlib, shutil, markdown, frontmatter, arrow, jinja2
from fetch_ics import read_date
import utils
	
if __name__ == "__main__":

	with open('conf.yml') as fp:
		conf = yaml.safe_load(fp.read())

	content = pathlib.Path(conf['content'])
	template = pathlib.Path(conf['template'])

	## description
	desc = utils.read_file(content / 'description.md')
	if not desc:
		print("not description.md in content/")
		exit(1)

	# template
	index = utils.read_file(template / 'index.html')
	if not index:
		print("not index.md in template/")
		exit(1)

	index_template = jinja2.Template(index)

	# partials templates
	partials = utils.get_files_in_subdir(template, 'partials', 'html')

	# head
	head_template = jinja2.Template(utils.read_file(partials['head']))
	res_js = [p.relative_to('resources') for p in list(utils.get_files_in_subdir('resources/', 'js', 'js').values())]
	res_css = [p.relative_to('resources') for p in list(utils.get_files_in_subdir('resources/', 'style', 'css').values())]
	head = head_template.render(title=conf['site'], js_items=res_js, css_items=res_css)

	# header
	header_template = jinja2.Template(utils.read_file(partials['header']))
	header = header_template.render(title=conf['site'])

	# cases
	cases_template = jinja2.Template(utils.read_file(partials['cases']))
	cases = cases_template.render()

	# description
	description_template = jinja2.Template(utils.read_file(partials['description']))
	desc = markdown.markdown(frontmatter.loads(desc).content)
	description = description_template.render(desc=desc)

	# section {events + readings}
	section_template = jinja2.Template(utils.read_file(partials['section']))

	# events
	events = list(utils.get_files_in_subdir(conf['content'], 'event', 'md').values())
	upcoming_events = []
	previous_events = []
	for e in events:
		p = frontmatter.load(e)
		summary = f"{p['title']} - {p['date']}"
		content = markdown.markdown(p.content)
		detail = f"<i>When:</i> {p['date']}<br><i>Where:</i> {p['location']}<br>{content}"
		el = {'summary': summary, 'detail': detail}

		if read_date(p) > arrow.utcnow():
			upcoming_events.append(el)
		else:
			previous_events.append(el)

	upcoming = section_template.render(section_id='events', section_title="Upcoming session(s)", section_items=upcoming_events)
	previous = section_template.render(section_id='archive', section_title="Previous sessions", section_items=previous_events)

	# reading bibliography
	reading = ""
	bibliography_dir = pathlib.Path(conf['content']) / "bibliography"
	bibliography = utils.ls_dir(bibliography_dir)

	for b in bibliography:
		reading_list = utils.get_files_in_subdir(bibliography_dir, b.stem, 'md')
		if not reading_list:
			continue
		reading_list = list(reading_list.values())
		readings = []
		for r in sorted(reading_list):
			p = frontmatter.load(r)
			summary = p['title']
			detail = markdown.markdown(p.content)
			readings.append({'summary': summary, 'detail': detail})

		reading += section_template.render(section_id='readings', section_title=b.stem, section_items=readings) + "\n"

	# footer
	if 'footer' in partials and 'footer_img' in conf:
		footer_template = jinja2.Template(utils.read_file(partials['footer']))
		footer = footer_template.render(footer_img=conf['footer_img'])


	# index_html
	index_html = index_template.render(head=head, header=header, cases=cases, description=description, upcoming=upcoming, reading=reading, previous=previous, footer=footer)

	# save
	output_path = pathlib.Path(f"{conf['output']}")
	index_path =  output_path / "index.html"
	utils.save_file(index_path, index_html, overwrite=True, mkdirs=True)
	shutil.copytree('resources', output_path, dirs_exist_ok=True)