import yaml
#import cairosvg
from weasyprint import HTML, CSS
import jinja2
from pathlib import Path
import networkx as nx
import matplotlib.pyplot as plt


def graph(roles):
    g = nx.Graph()
    g.add_nodes_from([str(role["num"]) for role in roles])
    for role in roles:
        for lien in role["liens"]:
            g.add_edge(str(role["num"]), str(list(lien.keys())[0]))
    return g

def build_topo(topo, roles):
    plt.figure(figsize=(2,2))
    ax = plt.gca()
    #ax.set_title(f"Forme du réseau: {topo}")
    g = graph(roles)
    nx.draw(g, 
            node_color='white',
            node_size=100,
            ax=ax)
    _ = ax.axis('off')
    plt.margins(0.2)
    plt.subplots_adjust(left=0, right=1, top=1, bottom=0)
    plt.savefig(f"{topo}/forme.png",
            transparent=True,
            )
    plt.cla()

def role_card(role, topo, template, css):
    card = template.render(topo=topo, **role)
    Path(topo).mkdir(exist_ok=True)
    dest = f"{topo}/role{role['num']}.html"
    with open(dest, "w") as f:
        f.write(card)
    #cairosvg.svg2pdf(url=dest, write_to=dest.replace("svg", "pdf"))
    HTML(dest).write_pdf(dest.replace("html", "pdf"), stylesheets=[css])


with open("roles.yml", "r") as f:
    topos = yaml.load(f, Loader=yaml.SafeLoader)
with open("role.html", "r") as f:
    template = jinja2.Template(f.read(), undefined=jinja2.StrictUndefined)
css = CSS("role.css")

for topo, desc in topos.items():
    build_topo(topo, desc["roles"])

    for role in desc["roles"]:
        role_card(role, topo, template, css)