import os
import markdown
import jinja2


def read_markdown(page_name, markdown_path):
    md_file = os.path.join(markdown_path, page_name + '.md')

    with open(md_file) as f:
        md_text = f.read()

    return md_text


def render_from_text(md_text, template_path):
    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()}

    data.update({
        'content': html,
        # 'page_name': page_name,  # Needed?
    })

    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)
    return page


def render(page_name, markdown_path, template_path):
    md_text = read_markdown(page_name, markdown_path)
    page = render_from_text(md_text, template_path)
    return page


def save(md_text, page_name, markdown_path):
    md_file = os.path.join(markdown_path, page_name + '.md')

    with open(md_file, 'w') as f:
        f.write(md_text)