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"""Methods to display styled pyvis plots."""
import json
from html import escape
from typing import Dict

from IPython.lib.display import IFrame
from pyvis.network import Network


def display_plot_ipython(
    viz: Network,
    output_filename: str,
    layout_kwargs: Dict[str, Dict] = None,
) -> IFrame:
    """
    Displays a PyVis object using ipython.
    Args:
        viz: pyvis object to render.
        output_filename: write html to a given path, e.g. "./plot.html". File as to end in ".html"
        layout_kwargs: Dictionary to set the `layout` and `physics` of the graph.
            Example:
            ::
                >>> layout_kwargs = {
                        "physics": {
                            "solver": "repulsion"
                            },
                        "layout": {
                            "hierarchical": {
                                "enabled": True
                                }
                            }
                        }
    Returns:
        IPython IFrame object. Renders in a notebook.
    Raises:
        ImportError: if IPython is not installed (optional dependency).
    """
    layout_kwargs = layout_kwargs or {}
    viz.set_options(options=json.dumps(layout_kwargs))

    html = viz.generate_html()

    with open(output_filename, mode="w", encoding="UTF-8") as f:
        f.write(html)

    return IFrame(
        src=output_filename,
        width=viz.width,
        height=viz.height,
        extras=[f"srcdoc='{escape(viz.generate_html(notebook=False))}'"],
    )
