from docutils import nodes
from docutils.parsers.rst import directives

CODE = """\
<object type="application/x-shockwave-flash"
        width="%(width)s"
        height="%(height)s"
        class="youtube-embed"
        data="https://www.youtube.com/v/%(yid)s?rel=0">
    <param name="movie" value="https://www.youtube.com/v/%(yid)s?rel=0"></param>
    <param name="wmode" value="transparent"></param>%(extra)s
</object>
"""

PARAM = """\n    <param name="%s" value="%s"></param>"""


def youtube(name, args, options, content, lineno, contentOffset, blockText, state, stateMachine):
	""" Restructured text extension for inserting youtube embedded videos """
	if len(content) == 0:
		return
	string_vars = {'yid': content[0], 'width': 640, 'height': 480, 'extra': ''}
	extra_args = content[1:]  # Because content[0] is ID
	extra_args = [ea.strip().split("=") for ea in extra_args]  # key=value
	extra_args = [ea for ea in extra_args if len(ea) == 2]  # drop bad lines
	extra_args = dict(extra_args)
	if 'width' in extra_args:
		string_vars['width'] = extra_args.pop('width')
	if 'height' in extra_args:
		string_vars['height'] = extra_args.pop('height')
	if extra_args:
		params = [PARAM % (key, extra_args[key]) for key in extra_args]
		string_vars['extra'] = "".join(params)
	return [nodes.raw('', CODE % (string_vars), format='html')]


youtube.content = True
directives.register_directive('youtube', youtube)
