import jinja2
import os
from operator import itemgetter


def file_name_to_solution(name):
    number = int(name.replace("EulerProblem", "").replace(".html", ""))
    file_name = name
    display_name = name.replace("EulerProblem", "Problem ").replace(".html", "") 
    return (number, file_name, display_name)


def get_solution_list(directory="./"):
    l = [file_name_to_solution(f) for f in os.listdir(directory)
        if f.endswith(".html") and f.startswith("EulerProblem")]
    l.sort(key=itemgetter(0))
    return l


def render_solutions(solutions):
    loader = jinja2.FileSystemLoader(searchpath="./")
    env = jinja2.Environment(loader=loader)
    template = env.get_template("template.html")
    d = {"solutions": solutions}
    with open("index.html", 'w') as f:
        f.write(template.render(**d))


render_solutions(get_solution_list())