from __future__ import annotations

from docutils import nodes

from sphinx.application import Sphinx
from sphinx.util.docutils import SphinxDirective, SphinxRole
from sphinx.util.typing import ExtensionMetadata


class HelloRole(SphinxRole):
    """A role to say hello!"""

    def run(self) -> tuple[list[nodes.Node], list[nodes.system_message]]:
        node = nodes.inline(text=f'Hello {self.text}!')
        return [node], []


class HelloDirective(SphinxDirective):
    """A directive to say hello!"""

    required_arguments = 1

    def run(self) -> list[nodes.Node]:
        paragraph_node = nodes.paragraph(text=f'hello {self.arguments[0]}!')
        return [paragraph_node]


def setup(app: Sphinx) -> ExtensionMetadata:
    app.add_role('hello', HelloRole())
    app.add_directive('hello', HelloDirective)

    return {
        'version': '0.1',
        'parallel_read_safe': True,
        'parallel_write_safe': True,
    }