# import json
from pathlib import Path

from sphinx.util import logging
# from docutils import nodes

__version__ = "0.1"

def add_static_sources(app):
    static_path = Path(__file__).parent / "static"
    app.config.html_static_path.append(static_path.as_posix())


def remove_buttons(app, pagename, _templatename, context, _doctree):
    if not pagename.startswith("U0"):
        # not one of the units, don't do anything
        return

    is_engish = pagename.endswith(".en")

    buttons = context["header_buttons"]

    keep = []
    for button in buttons:
        try:
            if button["tooltip"] == "Start presenting":
                keep.append(button)
        except Exception as _e:
            pass
    
    keep.append({
        "type": "javascript",
        "javascript": "switchLanguage()",
        "tooltip": "Deutsch" if is_engish else "English",
        "icon": "fas fa-language",
    })
    app.add_js_file("switch-language.js")

    context["header_buttons"] = keep


def setup(app):
    app.connect("builder-inited", add_static_sources)
    app.connect("html-page-context", remove_buttons, priority=9999)

    return {
        "version": __version__,
        "parallel_read_safe": True,
        "parallel_write_safe": True,
    }