#!/usr/bin/python -i
from types import TracebackType

import pytest

from circuits import Component, Event, handler


class hello(Event):
    """Hello Event"""


class test(Event):
    """test Event"""


class foo(Event):
    """foo Event"""


class values(Event):
    """values Event"""

    complete = True


class App(Component):
    def hello(self):
        return 'Hello World!'

    def test(self):
        return self.fire(hello())

    def foo(self):
        raise Exception('ERROR')

    @handler('hello_value_changed')
    def _on_hello_value_changed(self, value):
        self.value = value

    @handler('test_value_changed')
    def _on_test_value_changed(self, value):
        self.value = value

    @handler('values', priority=2.0)
    def _value1(self):
        return 'foo'

    @handler('values', priority=1.0)
    def _value2(self):
        return 'bar'

    @handler('values', priority=0.0)
    def _value3(self):
        return self.fire(hello())


@pytest.fixture()
def app(request, simple_manager):
    return App().register(simple_manager)


def test_value(app, simple_manager):
    x = app.fire(hello())
    simple_manager.run()

    assert 'Hello World!' in x
    assert x.value == 'Hello World!'


def test_nested_value(app, simple_manager):
    x = app.fire(test())
    simple_manager.run()

    assert x.value == 'Hello World!'
    assert str(x) == 'Hello World!'


def test_value_notify(app, simple_manager):
    ev = hello()
    ev.notify = True
    x = app.fire(ev)

    simple_manager.run()

    assert 'Hello World!' in x
    assert x.value == 'Hello World!'
    assert app.value is x


def test_nested_value_notify(app, simple_manager):
    ev = test()
    ev.notify = True
    x = app.fire(ev)

    simple_manager.run()

    assert x.value == 'Hello World!'
    assert str(x) == 'Hello World!'
    assert app.value is x


def test_error_value(app, simple_manager):
    x = app.fire(foo())
    simple_manager.run()

    etype, evalue, etraceback = x
    assert etype is Exception
    assert str(evalue) == 'ERROR'
    assert isinstance(etraceback, TracebackType)


def test_multiple_values(app, simple_manager):
    v = app.fire(values())
    simple_manager.run()

    assert isinstance(v.value, list)

    x = list(v)

    assert 'foo' in v
    assert x == ['foo', 'bar', 'Hello World!']
    assert x[0] == 'foo'
    assert x[1] == 'bar'
    assert x[2] == 'Hello World!'