import autopath
from py.test import raises

from tiramisu.config import Config
from tiramisu.option import StrOption, OptionDescription
from tiramisu.error import ConfigError


def return_true(value, param=None):
    if value == 'val' and param in [None, 'yes']:
        return True


def return_false(value, param=None):
    if value == 'val' and param in [None, 'yes']:
        return False


def return_val(value, param=None):
    return 'val'


def test_validator():
    opt1 = StrOption('opt1', '', validator=return_true, default='val')
    raises(ValueError, "StrOption('opt2', '', validator=return_false, default='val')")
    raises(ConfigError, "StrOption('opt3', '', validator=return_val, default='val')")
    opt2 = StrOption('opt2', '', validator=return_false)
    opt3 = StrOption('opt3', '', validator=return_val)
    root = OptionDescription('root', '', [opt1, opt2, opt3])
    cfg = Config(root)
    assert cfg.opt1 == 'val'
    raises(ValueError, "cfg.opt2 = 'val'")
    raises(ConfigError, "cfg.opt3 = 'val'")


def test_validator_params():
    opt1 = StrOption('opt1', '', validator=return_true, validator_params={'': ('yes',)}, default='val')
    raises(ValueError, "StrOption('opt2', '', validator=return_false, validator_params={'': ('yes',)}, default='val')")
    raises(ConfigError, "StrOption('opt3', '', validator=return_val, validator_params={'': ('yes',)}, default='val')")
    opt2 = StrOption('opt2', '', validator=return_false, validator_params={'': ('yes',)})
    opt3 = StrOption('opt3', '', validator=return_val, validator_params={'': ('yes',)})
    root = OptionDescription('root', '', [opt1, opt2, opt3])
    cfg = Config(root)
    assert cfg.opt1 == 'val'
    raises(ValueError, "cfg.opt2 = 'val'")
    raises(ConfigError, "cfg.opt3 = 'val'")


def test_validator_params_key():
    opt1 = StrOption('opt1', '', validator=return_true, validator_params={'param': ('yes',)}, default='val')
    raises(TypeError, "StrOption('opt2', '', validator=return_true, validator_params={'param_unknown': ('yes',)}, default='val')")
    root = OptionDescription('root', '', [opt1])
    cfg = Config(root)
    assert cfg.opt1 == 'val'


def test_validator_params_option():
    opt0 = StrOption('opt0', '', default='val')
    raises(ValueError, "opt1 = StrOption('opt1', '', validator=return_true, validator_params={'': ((opt0, False),)}, default='val')")