from marko import inline
from marko.helpers import MarkoExtension


class ExtendedImage(inline.InlineElement):
    pattern = r'!\[(.*)\]\(((?:[^"\s\\]|\\.)+|"(?:[^"\\]|\\.)*")\s((?:[^"\s\\]|\\.)+|"(?:[^"\\]|\\.)*")\s((?:[^"\s\\]|\\.)+|"(?:[^"\\]|\\.)*")\s((?:[^"\s\\]|\\.)+|"(?:[^"\\]|\\.)*")\)'
    parse_children = True

    def __init__(self, match):
        self.alt = self.__strip_quotes(match.group(1))
        self.src = self.__strip_quotes(match.group(2))
        self.title = self.__strip_quotes(match.group(3))
        self.href = self.__strip_quotes(match.group(4))
        self.figcaption = self.__strip_quotes(match.group(5))

    @staticmethod
    def __strip_quotes(text: str) -> str:
        if text.startswith('"'):
            return text[1:-1]

        return text


class ExtendedImageRenderer:
    def render_extended_image(self, element):
        img = f'<img src="{element.src}" title="{element.title}" alt="{element.alt}" />'

        if element.href != "":
            img = f'<a href="{element.href}">{img}</a>'

        if element.figcaption != "":
            img = f"<figure>{img}<figcaption>{element.figcaption}</figcaption></figure>"

        return img


ExtendedImage = MarkoExtension(
    elements=[ExtendedImage],
    renderer_mixins=[ExtendedImageRenderer]
)