import os
from flask import request, has_request_context

localData = {}

DEFAULT_FILES_SOURCE = "creditfairadmin"
PRE_ELIGIBILITY_FILES_SOURCE = "pre_eligibility"


def is_pre_eligibility_request():
    """
    Checks the incoming request payload for the pre_eligibility flag.
    :return: True when the request is a pre-eligibility call, else False
    """
    if has_request_context() and request.is_json and request.json:
        pre_elig = request.json.get("pre_eligibility")
        return pre_elig is True or str(pre_elig).lower() == "true"
    return False


def autoload(data):
    """
    This function reads and parses the config.json
    at the start of the API call.
    autoload sets all the respective connection
    configurations mentioned in the config.json.
    eg: for s3 connection for bureau and finbit files.
    :param data: json with all configurations
    :return: no return statement
    """
    _autoload = data.get("autoload")
    config = _autoload.get("config")
    from helper_methods import load_from_S3
    if config is not None:
        for config_name in config.keys():
            if config_name in ["s3"]:
                for c_config_name in config.get(config_name).keys():
                    if config.get(config_name)[c_config_name] != "::getENV":
                        os.environ[c_config_name] = config.get(config_name)[c_config_name]
            if config_name in ["files"]:
                files_config = config.get(config_name)
                source = PRE_ELIGIBILITY_FILES_SOURCE if is_pre_eligibility_request() else DEFAULT_FILES_SOURCE
                source_config = files_config.get(source) or files_config.get(DEFAULT_FILES_SOURCE) or {}
                # drop file configs loaded by a previous call so that a source
                # without a given file type does not fall back on stale data
                for other_source in files_config.values():
                    for c_config_name in other_source.keys():
                        localData.pop(c_config_name, None)
                for c_config_name in source_config.keys():
                    if source_config[c_config_name]["type"] == "s3":
                        localData[c_config_name] = load_from_S3(source_config[c_config_name])
            if config_name in ["dataConfig"]:
                for c_config_name in config.get(config_name).keys():
                    if config_name not in localData:
                        localData[config_name] = {}
                    localData[config_name][c_config_name] = config.get(config_name)[c_config_name]
    return localData