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from dataclasses import dataclass
from mastodon import Mastodon
from typing import Tuple, Dict

import yaml


@dataclass
class Config(object):
    server: Tuple[str, int, bool]
    nickname: str
    username: str
    realname: str
    channel: str

    sasl: Tuple[str, str]
    mastodon_accounts: Dict[str, Mastodon]
    assigned_channels: Dict[str, str]


def load(filepath: str):
    with open(filepath) as file:
        config_yaml = yaml.safe_load(file.read())

    nickname = config_yaml["nickname"]

    server = config_yaml["server"]
    hostname, port_s = server.split(":", 1)
    tls = None

    if port_s.startswith("+"):
        tls = True
        port_s = port_s.lstrip("+")
    port = int(port_s)

    accounts = {}
    channels = {}
    for acct in config_yaml["mastodon"]:
        accounts[acct["name"]] = Mastodon(
            client_id=acct["client_id"],
            client_secret=acct["client_secret"],
            access_token=acct["access_token"],
            api_base_url=acct["api_base_url"],
        )
        if "channels" in acct:
            for channel in acct["channels"]:
                channels[channel] = acct["name"]

    return Config(
        (hostname, port, tls),
        nickname,
        config_yaml.get("username", nickname),
        config_yaml.get("realname", nickname),
        config_yaml["channel"],
        (config_yaml["sasl"]["username"], config_yaml["sasl"]["password"]),
        mastodon_accounts=accounts,
        assigned_channels=channels,
    )