from modifiable_property import ModifiableProperty


def resolve(knowledge_base, elements, value):
    if isinstance(value, int):
        return elements[value]
    elif isinstance(value, tuple) or isinstance(value, list):
        return integrate_information(knowledge_base, {
            "elements": elements,
            "parsed": value,
        })
    return value


# TODO: improve typing
def infer_type(result):
    if isinstance(result, bool):
        return "bool"
    elif isinstance(result, int):
        return "int"

    else:
        raise Exception("Unknown type for value: {}".format(result))


def get_subquery_type(knowledge_base, atom):
    subquery_result = integrate_information(knowledge_base,
                                            {
                                                "parsed": atom,
                                                "elements": [],
                                            })
    assert (subquery_result is not None)
    result = subquery_result.getter()

    result_type = infer_type(result)
    return result_type


def property_for_value(knowledge_base, value):
    # logging.debug(value)
    # logging.debug(knowledge_base[value])
    return knowledge_base[value]['as_property']


def modifiable_property_from_property(prop, path, value):
    def getter():
        nonlocal prop, path, value
        return (path in prop) and prop[path] == value

    def setter():
        nonlocal prop, path, value
        prop[path] = value

    return ModifiableProperty(
        getter=getter,
        setter=setter,
    )


def exists_property_with_value(knowledge_base, elements, subj, value):
    subj = resolve(knowledge_base, elements, subj)
    value = resolve(knowledge_base, elements, value)

    if subj not in knowledge_base:
        knowledge_base[subj] = {}

    return modifiable_property_from_property(
        prop=knowledge_base[subj],
        path=property_for_value(knowledge_base, value),
        value=value
    )


def modifiable_element_for_existance_in_set(container, set_name, element):
    def getter():
        nonlocal container, set_name, element
        return (set_name in container) and (element in container[set_name])

    def setter():
        nonlocal container, set_name, element
        return container[set_name].add(element)

    return ModifiableProperty(
        getter=getter,
        setter=setter,
    )

def pertenence_to_group(knowledge_base, elements, subj, group):
    subj = resolve(knowledge_base, elements, subj)
    group = resolve(knowledge_base, elements, group)

    if subj not in knowledge_base:
        knowledge_base[subj] = {}

    if "groups" not in knowledge_base[subj]:
        knowledge_base[subj]["groups"] = set()

    return modifiable_element_for_existance_in_set(
        container=knowledge_base[subj],
        set_name="groups",
        element=group
    )


def has_capacity(knowledge_base, elements, subj, capacity):
    subj = resolve(knowledge_base, elements, subj)
    capacity = resolve(knowledge_base, elements, capacity)

    if subj not in knowledge_base:
        knowledge_base[subj] = {}

    if "capacities" not in knowledge_base[subj]:
        knowledge_base[subj]["capacities"] = set()

    return modifiable_element_for_existance_in_set(
        container=knowledge_base[subj],
        set_name="capacities",
        element=capacity
    )


def question(knowledge_base, elements, subj):
    subj = resolve(knowledge_base, elements, subj)

    if isinstance(subj, ModifiableProperty):
        return subj.getter()
    return subj


knowledge_ingestion = {
    "exists-property-with-value": exists_property_with_value,
    "pertenence-to-group": pertenence_to_group,
    "has-capacity": has_capacity,
    "question": question,
}


def integrate_information(knowledge_base, example):
    method = example['parsed'][0]
    args = example['parsed'][1:]
    elements = example.get('elements', None)

    return knowledge_ingestion[method](knowledge_base, elements, *args)