import os
import requests

def must_get_env(name):
    v = os.getenv(name)
    if not v:
        raise Exception(f"missing environment variable '{name}'")
    return v


PROJECT = must_get_env("PROJECT")
VERSION = must_get_env("VERSION")
NTFY_ADDRESS = must_get_env("NTFY_ADDRESS")
NTFY_TOKEN = must_get_env("NTFY_TOKEN")


def split_at(s, sep):
    split = s.split(sep, 1)
    split.extend([None, None][:2-len(split)])
    return split



def main():
    versions = requests.get(f"https://api.modrinth.com/v2/project/{PROJECT}/version").json()
    
    (version, loader) = split_at(VERSION, '@')

    v = find_version(versions, version, loader)
    
    if v:
        res = requests.put(
            NTFY_ADDRESS, 
            headers={
                "Authorization": f"Bearer {NTFY_TOKEN}",
                "Title": f"{PROJECT} update available!",
            },
            data=f"Version {version} is now available for {PROJECT}!")
        print(res)

    pass


def find_version(versions, desired_version, loader):
    for version in versions:
        if desired_version not in version.get("game_versions"):
            continue
        if loader and loader not in version.get("loaders"):
            continue
        return version
    return None


if __name__ == "__main__":
    main()