"""
Custom vertex shape
===================

This example shows how to use a custom vertex shape in an iplotx graph.
These can be polygons, i.e. instances of ``matplotlib.patches.Polygon``,
or more general paths, i.e. instances of ``matplotlib.path.Path``.

.. note::
  Both polygons and paths are rescaled to match the size or sizes specified
  by the ``vertex_size`` (aka ``node_size``) style in use.
"""

from matplotlib.path import Path
from matplotlib.patches import Polygon
import matplotlib.pyplot as plt
import iplotx as ipx
import networkx as nx


g = nx.from_edgelist([
    (0, 1),
    (1, 2),
    (2, 3),
    (3, 0),
])
layout = [
    [0, 0],
    [1, 0],
    [1, 1],
    [0, 1],
]

# Example with a polygon
custom_marker = Polygon(
    [
        (-1, -1),
        (-0.2, -1),
        (-0.2, -0.3),
        (-0.15, -0.2),
        (0.15, -0.2),
        (0.2, -0.3),
        (0.2, -1),
        (1, -1),
        (1, 0.6),
        (1.2, 0.6),
        (0, 1.7),
        (-1.2, 0.6),
        (-1, 0.6),
    ],
)

ipx.network(
    g,
    layout=layout,
    node_marker=custom_marker,
    node_facecolor=["tomato", "gold", "purple", "mediumaquamarine"],
    node_edgecolor="black",
    node_size=30,
    figsize=(3, 3),
    margins=0.15,
)


# %%
# And below is another example with a more general path:

main_house = Path(
    [
        (-1, -1),
        (-0.2, -1),
        (-0.2, -0.3),
        (-0.15, -0.2),
        (0.15, -0.2),
        (0.2, -0.3),
        (0.2, -1),
        (1, -1),
        (1, 0.6),
        (1.2, 0.6),
        (0, 1.7),
        (-1.2, 0.6),
        (-1, 0.6),
        (-1, -1),
    ],
)
window1 = Path(
    [
        (-0.6, -0.1),
        (-0.6, 0.3),
        (-0.3, 0.3),
        (-0.3, -0.1),
        (-0.6, -0.1),
    ]
)
window2 = Path(
    [
        (0.6, -0.1),
        (0.3, -0.1),
        (0.3, 0.3),
        (0.6, 0.3),
        (0.6, -0.1),
    ]
)
roof_highlight1 = Path(
    [
        (0.9, 0.6),
        (0, 1.4),
        (-0.9, 0.6),
    ],
)
roof_highlight2 = Path(
    [
        (0.6, 0.6),
        (0, 1.1),
        (-0.6, 0.6),
    ],
)
custom_marker = Path.make_compound_path(
    main_house,
    window1,
    window2,
    roof_highlight1,
    roof_highlight2,
)

ipx.network(
    g,
    layout=layout,
    node_marker=custom_marker,
    node_facecolor=["tomato", "gold", "purple", "mediumaquamarine"],
    node_edgecolor="black",
    node_size=30,
    figsize=(3, 3),
    margins=0.15,
)

# %%
# .. warning::
#   Curved paths will not throw an error but might result in inaccurate edge joints.
#   You can approximate Bezier curves with segments of straight lines if needed.
#
# .. tip::
#   If you are creating non-degenerate polygons this way - polygons with holes such
#   as the house above - remember that the filling of each individual path will be
#   ignored if the are drawn anticlockwise (e.g. the roof roof highlights) and
#   considered - that is, hollowed out - if drawn clockwise (e.g. the windows).