import json
from urllib.request import urlopen

from schema import Schema

from .parser import SSAConfigParser
from .validation import validate
from ..internal.exceptions import SSAError


def load_parser() -> SSAConfigParser:
    """
    Create parser and load configuration
    :return: parser
    """
    conf = SSAConfigParser()
    conf.read_ssa_conf()
    return conf


def load_validated_parser() -> SSAConfigParser:
    """
    Create parser, load configuration, validate it
    :return: parser
    """
    conf = load_parser()
    _ = validate(dict(conf.items()))
    return conf


def load_configuration() -> dict:
    """
    Load and validate configuration
    """
    conf = load_parser()
    return validate(dict(conf.items()))


def load_tunables(external_source: str, scheme: Schema) -> dict:
    """
    Load values from remote JSON config or
    default values in case of troubles
    """
    cfg_location = f"https://1.mirror.ir.cdn.mycache.org/cloudlinux/sources/da/{external_source}"
    try:
        with urlopen(cfg_location) as cfg:
            return validate(json.load(cfg), scheme)
    except (OSError, json.JSONDecodeError, SSAError):
        return validate(dict(), scheme)