# -*- encoding: utf-8 -*-
import logging
import typing as T

from latecomers.helpers import logit

import yaml

logger = logging.getLogger(__name__)


def get_section(obj: T.Dict[T.Text, T.Any], key: T.Text) -> T.Any:
    value = obj.get(key)
    if value is None:
        raise ValueError(f"Missing '{key}' value")

    return value


class Config(object):
    smtp: T.Dict[T.Text, T.Any] = {}
    to: T.List[T.Text] = []
    cc: T.List[T.Text] = []
    store: T.Optional[T.Text] = None

    def __init__(self, path: T.Text) -> None:
        self.from_file(path)

    @logit(logger)
    def from_file(self, path: T.Text) -> None:
        """
        Parses the file and validates it.
        """
        with open(path) as f:
            content = yaml.safe_load(f)

        self.to = get_section(content, "to")

        if cc := content.get("cc"):
            self.cc = cc

        smtp = get_section(content, "smtp")
        for key in [
            "smtp_addr",
            "smtp_port",
            "smtp_starttls",
            "smtp_user",
            "smtp_pass",
        ]:
            self.smtp[key] = get_section(smtp, key)

        self.smtp["smtp_from"] = smtp.get("smtp_from")

        self.store = content.get("store")

    def __str__(self) -> T.Text:
        return f"Config<smtp={self.smtp},to={self.to}>"