import importlib
import logging
import os

import yaml

# Check you have a config file
if not os.path.isfile("config.yml"):
    logging.error(
        "Your config file is missing. Ensure you have copied config-example.yml to config.yml and updated it according to your needs.")
    exit()

# Load config
with open("config.yml") as f:
    config = yaml.safe_load(f)
logging.info("Loaded config.")

BASE_URL = config["base-url"]
MAX_SPOT_AGE = config["max-spot-age-sec"]
MAX_ALERT_AGE = config["max-alert-age-sec"]
SERVER_OWNER_CALLSIGN = config["server-owner-callsign"]
WEB_SERVER_PORT = config["web-server-port"]
ALLOW_SPOTTING = config["allow-spotting"]
WEB_UI_OPTIONS = config["web-ui-options"]
API_ONLY_MODE = config.get("api-only-mode", False)
LOG_LEVEL = config.get("log-level", "INFO")
LOG_WEB_REQUESTS = config.get("log-web-requests", False)

# For ease of config, each spot provider owns its own config about whether it should be enabled by default in the web UI
# but for consistency we provide this to the front-end in web-ui-options because it has no impact outside of the web UI.
WEB_UI_OPTIONS["spot-providers-enabled-by-default"] = [p["name"] for p in config["spot-providers"] if p["enabled"] and (
        "enabled-by-default-in-web-ui" not in p or p["enabled-by-default-in-web-ui"])]
# If spotting to this server is enabled, "API" is another valid spot source even though it does not come from
# one of our proviers. We set that to also be enabled by default.
if ALLOW_SPOTTING:
    WEB_UI_OPTIONS["spot-providers-enabled-by-default"].append("API")


def get_spot_provider_from_config(config_providers_entry):
    """Utility method to get a spot provider based on the class specified in its config entry."""

    module = importlib.import_module('spotproviders.' + config_providers_entry["class"].lower())
    provider_class = getattr(module, config_providers_entry["class"])
    return provider_class(config_providers_entry)


def get_alert_provider_from_config(config_providers_entry):
    """Utility method to get an alert provider based on the class specified in its config entry."""

    module = importlib.import_module('alertproviders.' + config_providers_entry["class"].lower())
    provider_class = getattr(module, config_providers_entry["class"])
    return provider_class(config_providers_entry)


def get_solar_conditions_provider_from_config(config_providers_entry):
    """Utility method to get a solar conditions provider based on the class specified in its config entry."""

    module = importlib.import_module('solarconditionsproviders.' + config_providers_entry["class"].lower())
    provider_class = getattr(module, config_providers_entry["class"])
    return provider_class(config_providers_entry)


def get_static_data_provider_from_config(config_providers_entry):
    """Utility method to get a static reference data provider based on the class specified in its config entry."""

    module = importlib.import_module('staticdataproviders.' + config_providers_entry["class"].lower())
    provider_class = getattr(module, config_providers_entry["class"])
    return provider_class(config_providers_entry)


def get_sig_ref_data_provider_from_config(config_providers_entry):
    """Utility method to get a SIG reference data provider based on the class specified in its config entry."""

    module = importlib.import_module('sigrefdataproviders.' + config_providers_entry["class"].lower())
    provider_class = getattr(module, config_providers_entry["class"])
    return provider_class(config_providers_entry)