#!/usr/bin/env python3
import os
import markdown
import jinja2

template_path = 'templates'
md_path = './markdown'
html_path = './target'


def write_page(page, out_name):
    out_path = os.path.join(html_path, out_name)
    with open(out_path, 'w') as f:
        f.write(page)


def render_page(data):
    template_name = data.get('template', 'default')
    template_file = os.path.join(template_path, template_name + '.html')

    with open(template_file) as f:
        template = f.read()

    page = jinja2.Template(template).render(**data)
    write_page(page, data['file_name'])


def read_md(md_file):
    full_name = os.path.join(md_path, md_file)
    with open(full_name) as f:
        md_text = f.read()
    return md_text


def make_page(md_file):
    md_text = read_md(md_file)

    md = markdown.Markdown(extensions=['meta'], output_format='html5')
    html = md.convert(md_text)

    # get markdown metadata
    data = {key: md.Meta[key][0]
            for key in md.Meta.keys()}

    out_name = os.path.splitext(md_file)[0] + '.html'

    data.update({
        'content': html,
        'file_name': out_name,
    })

    return data


def valid_md(md_file):
    full_name = os.path.join(md_path, md_file)
    return os.path.isfile(full_name) and full_name.endswith('.md')


def main():
    for md_file in os.listdir(md_path):
        if valid_md(md_file):
            page = make_page(md_file)
            render_page(page)


if __name__ == '__main__':
    main()