#!/usr/bin/python
# -*- coding: utf-8 -*-
from __future__ import absolute_import
from __future__ import with_statement

import sys

from kombu.serialization import (registry, register, SerializerNotInstalled,
                                 raw_encode, register_yaml, register_msgpack,
                                 decode, bytes_t, pickle, pickle_protocol,
                                 unregister, register_pickle)

from .utils import TestCase
from .utils import mask_modules, skip_if_not_module

# For content_encoding tests
unicode_string = u'abcdé\u8463'
unicode_string_as_utf8 = unicode_string.encode('utf-8')
latin_string = u'abcdé'
latin_string_as_latin1 = latin_string.encode('latin-1')
latin_string_as_utf8 = latin_string.encode('utf-8')


# For serialization tests
py_data = {'string': 'The quick brown fox jumps over the lazy dog',
        'int': 10,
        'float': 3.14159265,
        'unicode': u'Thé quick brown fox jumps over thé lazy dog',
        'list': ['george', 'jerry', 'elaine', 'cosmo'],
}

# JSON serialization tests
json_data = ('{"int": 10, "float": 3.1415926500000002, '
             '"list": ["george", "jerry", "elaine", "cosmo"], '
             '"string": "The quick brown fox jumps over the lazy '
             'dog", "unicode": "Th\\u00e9 quick brown fox jumps over '
             'th\\u00e9 lazy dog"}')

# Pickle serialization tests
pickle_data = pickle.dumps(py_data, protocol=pickle_protocol)

# YAML serialization tests
yaml_data = ('float: 3.1415926500000002\nint: 10\n'
             'list: [george, jerry, elaine, cosmo]\n'
             'string: The quick brown fox jumps over the lazy dog\n'
             'unicode: "Th\\xE9 quick brown fox '
             'jumps over th\\xE9 lazy dog"\n')


msgpack_py_data = dict(py_data)
# msgpack only supports tuples
msgpack_py_data['list'] = tuple(msgpack_py_data['list'])
# Unicode chars are lost in transmit :(
msgpack_py_data['unicode'] = 'Th quick brown fox jumps over th lazy dog'
msgpack_data = ('\x85\xa3int\n\xa5float\xcb@\t!\xfbS\xc8\xd4\xf1\xa4list'
                '\x94\xa6george\xa5jerry\xa6elaine\xa5cosmo\xa6string\xda'
                '\x00+The quick brown fox jumps over the lazy dog\xa7unicode'
                '\xda\x00)Th quick brown fox jumps over th lazy dog')


def say(m):
    sys.stderr.write('%s\n' % (m, ))


registry.register('testS', lambda s: s, lambda s: 'decoded',
                  'application/testS', 'utf-8')


class test_Serialization(TestCase):

    def test_disable(self):
        disabled = registry._disabled_content_types
        try:
            registry.disable('testS')
            self.assertIn('application/testS', disabled)
            disabled.clear()

            registry.disable('application/testS')
            self.assertIn('application/testS', disabled)
        finally:
            disabled.clear()

    def test_decode_when_disabled(self):
        disabled = registry._disabled_content_types
        try:
            registry.disable('testS')

            with self.assertRaises(SerializerNotInstalled):
                registry.decode('xxd', 'application/testS', 'utf-8',
                                force=False)

            ret = registry.decode('xxd', 'application/testS', 'utf-8',
                            force=True)
            self.assertEqual(ret, 'decoded')
        finally:
            disabled.clear()

    def test_decode_when_data_is_None(self):
        registry.decode(None, 'application/testS', 'utf-8')

    def test_content_type_decoding(self):
        self.assertEqual(unicode_string,
                          registry.decode(
                              unicode_string_as_utf8,
                              content_type='plain/text',
                              content_encoding='utf-8'))
        self.assertEqual(latin_string,
                          registry.decode(
                              latin_string_as_latin1,
                              content_type='application/data',
                              content_encoding='latin-1'))

    def test_content_type_binary(self):
        self.assertIsInstance(registry.decode(unicode_string_as_utf8,
                                              content_type='application/data',
                                              content_encoding='binary'),
                              bytes_t)

        self.assertEqual(unicode_string_as_utf8,
                          registry.decode(
                              unicode_string_as_utf8,
                              content_type='application/data',
                              content_encoding='binary'))

    def test_content_type_encoding(self):
        # Using the 'raw' serializer
        self.assertEqual(unicode_string_as_utf8,
                          registry.encode(
                              unicode_string, serializer='raw')[-1])
        self.assertEqual(latin_string_as_utf8,
                          registry.encode(
                              latin_string, serializer='raw')[-1])
        # And again w/o a specific serializer to check the
        # code where we force unicode objects into a string.
        self.assertEqual(unicode_string_as_utf8,
                            registry.encode(unicode_string)[-1])
        self.assertEqual(latin_string_as_utf8,
                            registry.encode(latin_string)[-1])

    def test_json_decode(self):
        self.assertEqual(py_data,
                          registry.decode(
                              json_data,
                              content_type='application/json',
                              content_encoding='utf-8'))

    def test_json_encode(self):
        self.assertEqual(registry.decode(
                              registry.encode(py_data, serializer='json')[-1],
                              content_type='application/json',
                              content_encoding='utf-8'),
                          registry.decode(
                              json_data,
                              content_type='application/json',
                              content_encoding='utf-8'))

    @skip_if_not_module('msgpack')
    def test_msgpack_decode(self):
        register_msgpack()
        self.assertEqual(msgpack_py_data,
                          registry.decode(
                              msgpack_data,
                              content_type='application/x-msgpack',
                              content_encoding='binary'))

    @skip_if_not_module('msgpack')
    def test_msgpack_encode(self):
        register_msgpack()
        self.assertEqual(registry.decode(
                registry.encode(msgpack_py_data, serializer='msgpack')[-1],
                content_type='application/x-msgpack',
                content_encoding='binary'),
                registry.decode(
                    msgpack_data,
                    content_type='application/x-msgpack',
                    content_encoding='binary'))

    @skip_if_not_module('yaml')
    def test_yaml_decode(self):
        register_yaml()
        self.assertEqual(py_data,
                          registry.decode(
                              yaml_data,
                              content_type='application/x-yaml',
                              content_encoding='utf-8'))

    @skip_if_not_module('yaml')
    def test_yaml_encode(self):
        register_yaml()
        self.assertEqual(registry.decode(
                              registry.encode(py_data, serializer='yaml')[-1],
                              content_type='application/x-yaml',
                              content_encoding='utf-8'),
                          registry.decode(
                              yaml_data,
                              content_type='application/x-yaml',
                              content_encoding='utf-8'))

    def test_pickle_decode(self):
        self.assertEqual(py_data,
                          registry.decode(
                              pickle_data,
                              content_type='application/x-python-serialize',
                              content_encoding='binary'))

    def test_pickle_encode(self):
        self.assertEqual(pickle.loads(pickle_data),
                          pickle.loads(registry.encode(py_data,
                              serializer='pickle')[-1]))

    def test_register(self):
        register(None, None, None, None)

    def test_unregister(self):
        with self.assertRaises(SerializerNotInstalled):
            unregister('nonexisting')
        registry.encode('foo', serializer='pickle')
        unregister('pickle')
        with self.assertRaises(SerializerNotInstalled):
            registry.encode('foo', serializer='pickle')
        register_pickle()

    def test_set_default_serializer_missing(self):
        with self.assertRaises(SerializerNotInstalled):
            registry._set_default_serializer('nonexisting')

    def test_encode_missing(self):
        with self.assertRaises(SerializerNotInstalled):
            registry.encode('foo', serializer='nonexisting')

    def test_raw_encode(self):
        self.assertTupleEqual(raw_encode('foo'.encode('utf-8')),
                              ('application/data', 'binary',
                                  'foo'.encode('utf-8')))

    @mask_modules('yaml')
    def test_register_yaml__no_yaml(self):
        register_yaml()
        with self.assertRaises(SerializerNotInstalled):
            decode('foo', 'application/x-yaml', 'utf-8')

    @mask_modules('msgpack')
    def test_register_msgpack__no_msgpack(self):
        register_msgpack()
        with self.assertRaises(SerializerNotInstalled):
            decode('foo', 'application/x-msgpack', 'utf-8')
