# Source code for factory.helpers

    # -*- coding: utf-8 -*-
    # Copyright: See the LICENSE file.

    """Simple wrappers around Factory class definition."""

    import contextlib
    import logging

    from . import base
    from . import declarations

    @contextlib.contextmanager
    def debug(logger='factory', stream=None):
        logger_obj = logging.getLogger(logger)
        old_level = logger_obj.level

        handler = logging.StreamHandler(stream)
        handler.setLevel(logging.DEBUG)
        logger_obj.addHandler(handler)
        logger_obj.setLevel(logging.DEBUG)

        yield

        logger_obj.setLevel(old_level)
        logger_obj.removeHandler(handler)

    def make_factory(klass, **kwargs):
        """Create a new, simple factory for the given class."""
        factory_name = '%sFactory' % klass.__name__

        class Meta:
            model = klass

        kwargs['Meta'] = Meta
        base_class = kwargs.pop('FACTORY_CLASS', base.Factory)

        factory_class = type(base.Factory).__new__(type(base.Factory), factory_name, (base_class,), kwargs)
        factory_class.__name__ = '%sFactory' % klass.__name__
        factory_class.__doc__ = 'Auto-generated factory for class %s' % klass
        return factory_class

    def build(klass, **kwargs):
        """Create a factory for the given class, and build an instance."""
        return make_factory(klass, **kwargs).build()

    def build_batch(klass, size, **kwargs):
        """Create a factory for the given class, and build a batch of instances."""
        return make_factory(klass, **kwargs).build_batch(size)

    def create(klass, **kwargs):
        """Create a factory for the given class, and create an instance."""
        return make_factory(klass, **kwargs).create()

    def create_batch(klass, size, **kwargs):
        """Create a factory for the given class, and create a batch of instances."""
        return make_factory(klass, **kwargs).create_batch(size)

    def stub(klass, **kwargs):
        """Create a factory for the given class, and stub an instance."""
        return make_factory(klass, **kwargs).stub()

    def stub_batch(klass, size, **kwargs):
        """Create a factory for the given class, and stub a batch of instances."""
        return make_factory(klass, **kwargs).stub_batch(size)

    def generate(klass, strategy, **kwargs):
        """Create a factory for the given class, and generate an instance."""
        return make_factory(klass, **kwargs).generate(strategy)

    def generate_batch(klass, strategy, size, **kwargs):
        """Create a factory for the given class, and generate instances."""
        return make_factory(klass, **kwargs).generate_batch(strategy, size)

    def simple_generate(klass, create, **kwargs):
        """Create a factory for the given class, and simple_generate an instance."""
        return make_factory(klass, **kwargs).simple_generate(create)

    def simple_generate_batch(klass, create, size, **kwargs):
        """Create a factory for the given class, and simple_generate instances."""
        return make_factory(klass, **kwargs).simple_generate_batch(create, size)

    def lazy_attribute(func):
        return declarations.LazyAttribute(func)

    def iterator(func):
        """Turn a generator function into an iterator attribute."""
        return declarations.Iterator(func())

    def sequence(func):
        return declarations.Sequence(func)

    def lazy_attribute_sequence(func):
        return declarations.LazyAttributeSequence(func)

    def container_attribute(func):
        return declarations.ContainerAttribute(func, strict=False)

    def post_generation(fun):
        return declarations.PostGeneration(fun)