import os

import pytest

from . import any_date, relpath

import oxrlib.config
import oxrlib.loaders

INI_DIR_PATH = relpath('config_ini')

def config_from(ini_filename, arglist=None):
    if arglist is None:
        arglist = ['historical', any_date().isoformat()]
    ini_path = INI_DIR_PATH / ini_filename
    return oxrlib.config.Configuration(['--config-file', ini_path.as_posix()] + arglist)

def test_full_config():
    config = config_from('full.ini')
    loaders = config.get_loaders().loaders
    assert type(loaders[0]) is oxrlib.loaders.FileCache
    assert type(loaders[1]) is oxrlib.loaders.OXRAPIRequest
    assert len(loaders) == 2

def test_incomplete_config():
    config = config_from('incomplete.ini')
    assert not config.get_loaders().loaders

def test_empty_config():
    config = config_from(os.devnull)
    assert not config.get_loaders().loaders

@pytest.mark.parametrize('ini_filename,expected_currency,use_switch', [
    (os.devnull, 'USD', False),
    ('full.ini', 'INI', False),
    ('full.ini', 'EUR', True),
])
def test_historical_default_base(ini_filename, expected_currency, use_switch, any_date):
    arglist = ['historical']
    if use_switch:
        arglist.extend(['--base', expected_currency])
    arglist.append(any_date.isoformat())
    config = config_from(ini_filename, arglist)
    assert config.args.base == expected_currency