import unittest

from pycs.observable import Observable


class Wrapper:
    def __init__(self, init=0):
        self.value = init

    def inc(self):
        self.value += 1

    def set(self, value):
        self.value = value


class TestObservable(unittest.TestCase):
    settings = {
        'dir1': {
            'file11': 11,
            'file12': ['one', 'two'],
            'subdir1': {
                'file111': 'oneoneone',
                'file112': 112,
                'subdir11': {
                    'file1111': 1111
                }
            }
        },
        'dir2': {
            'file21': 21,
            'file22': 22
        },
        'dir3': {
            'subdir1': {
                'file311': 311
            }
        },
        'file1': 1
    }

    def test_load(self):
        obs = Observable.create(source=self.settings)

        # root
        self.assertEqual(obs['file1'], self.settings['file1'])

        # dict
        self.assertEqual(obs['dir1']['file11'], self.settings['dir1']['file11'])

        # list
        self.assertEqual(obs['dir1']['file12'][0], self.settings['dir1']['file12'][0])

    def test_update(self):
        obs = Observable.create(source=self.settings)

        # root
        obs['file1'] = 2
        self.assertEqual(2, obs['file1'])

        del obs['file1']
        self.assertFalse('file1' in obs)

        # dict
        obs['dir1']['file11'] = 12
        self.assertEqual(12, obs['dir1']['file11'])

        del obs['dir1']['file11']
        self.assertFalse('file11' in obs['dir1'])

        # list
        obs['dir1']['file12'][0] = 'three'
        self.assertEqual('three', obs['dir1']['file12'][0])

        del obs['dir1']['file12'][0]
        self.assertEqual(1, len(obs['dir1']['file12']))
        self.assertEqual('two', obs['dir1']['file12'][0])

    def test_subscribe(self):
        obs = Observable.create(source=self.settings)

        # root
        counter1 = Wrapper()
        obs['dir1'].subscribe(lambda x: counter1.inc())

        obs['dir1']['file11'] = 12
        self.assertEqual(1, counter1.value)

        del obs['dir1']['file11']
        self.assertEqual(2, counter1.value)

        # dict
        counter2 = Wrapper()
        obs['dir1'].subscribe(lambda x: counter2.inc())

        obs['dir1']['file11'] = 12
        self.assertEqual(1, counter2.value)

        del obs['dir1']['file11']
        self.assertEqual(2, counter2.value)

        # list
        counter3 = Wrapper()
        obs['dir1']['file12'].subscribe(lambda x: counter3.inc())

        obs['dir1']['file12'][0] = 'three'
        self.assertEqual(1, counter3.value)

        obs['dir1']['file12'].append(4)
        self.assertEqual(2, counter3.value)

        del obs['dir1']['file12'][1]
        self.assertEqual(3, counter3.value)

    # TODO test subscription value
    # TODO test complex append


if __name__ == '__main__':
    unittest.main()