from decimal import Decimal
from enum import Enum
from typing import Any, Dict, List, Set, Union

import pytest

from pydantic import BaseModel, NoneStrBytes, StrBytes, ValidationError, constr
from pydantic.exceptions import pretty_errors


def test_str_bytes():
    class StrBytesModel(BaseModel):
        v: StrBytes = ...

    m = StrBytesModel(v='s')
    assert m.v == 's'
    assert ("<Field v: "
            "type='typing.Union[str, bytes]', "
            "required=True, "
            "sub_fields=["
            "<Field v_str: type='str', required=True, validators=['not_none_validator', 'str_validator', "
            "'anystr_length_validator']>, "
            "<Field v_bytes: type='bytes', required=True, validators=['not_none_validator', 'bytes_validator', "
            "'anystr_length_validator']>]>") == repr(m.fields['v'])

    m = StrBytesModel(v=b'b')
    assert m.v == 'b'

    with pytest.raises(ValidationError) as exc_info:
        StrBytesModel(v=None)
    assert exc_info.value.message == 'error validating input'
    assert """\
{
  "v": [
    {
      "error_msg": "None is not an allow value",
      "error_type": "TypeError",
      "index": null,
      "track": "str"
    },
    {
      "error_msg": "None is not an allow value",
      "error_type": "TypeError",
      "index": null,
      "track": "bytes"
    }
  ]
}""" == exc_info.value.json(2)


def test_str_bytes_none():
    class StrBytesModel(BaseModel):
        v: NoneStrBytes = ...

    m = StrBytesModel(v='s')
    assert m.v == 's'

    m = StrBytesModel(v=b'b')
    assert m.v == 'b'

    m = StrBytesModel(v=None)
    assert m.v is None

    # NOTE not_none_validator removed
    assert ("OrderedDict(["
            "('type', 'typing.Union[str, bytes, NoneType]'), "
            "('required', True), "
            "('sub_fields', ["
            "<Field v_str: type='str', required=True, validators=['str_validator', 'anystr_length_validator']>, "
            "<Field v_bytes: type='bytes', required=True, validators=['bytes_validator', 'anystr_length_validator']>"
            "])])") == repr(m.fields['v'].info)


def test_union_int_str():
    class Model(BaseModel):
        v: Union[int, str] = ...

    m = Model(v=123)
    assert m.v == 123

    m = Model(v='123')
    assert m.v == 123

    m = Model(v=b'foobar')
    assert m.v == 'foobar'

    # here both validators work and it's impossible to work out which value "closer"
    m = Model(v=12.2)
    assert m.v == 12

    with pytest.raises(ValidationError) as exc_info:
        Model(v=None)
    assert exc_info.value.message == 'error validating input'
    assert """\
{
  "v": [
    {
      "error_msg": "int() argument must be a string, a bytes-like object or a number, not 'NoneType'",
      "error_type": "TypeError",
      "index": null,
      "track": "int"
    },
    {
      "error_msg": "None is not an allow value",
      "error_type": "TypeError",
      "index": null,
      "track": "str"
    }
  ]
}""" == exc_info.value.json(2)


def test_union_priority():
    class ModelOne(BaseModel):
        v: Union[int, str] = ...

    class ModelTwo(BaseModel):
        v: Union[str, int] = ...

    assert ModelOne(v='123').v == 123
    assert ModelTwo(v='123').v == '123'


def test_typed_list():
    class Model(BaseModel):
        v: List[int] = ...

    m = Model(v=[1, 2, '3'])
    assert m.v == [1, 2, 3]

    with pytest.raises(ValidationError) as exc_info:
        Model(v=[1, 'x', 'y'])
    assert exc_info.value.message == 'error validating input'
    assert """\
{
  "v": [
    {
      "error_msg": "invalid literal for int() with base 10: 'x'",
      "error_type": "ValueError",
      "index": 1,
      "track": "int"
    },
    {
      "error_msg": "invalid literal for int() with base 10: 'y'",
      "error_type": "ValueError",
      "index": 2,
      "track": "int"
    }
  ]
}""" == exc_info.value.json(2)

    with pytest.raises(ValidationError) as exc_info:
        Model(v=1)
    assert exc_info.value.message == 'error validating input'
    assert """\
{
  "v": {
    "error_msg": "'int' object is not iterable",
    "error_type": "TypeError",
    "index": null,
    "track": null
  }
}""" == exc_info.value.json(2)


def test_typed_set():
    class Model(BaseModel):
        v: Set[int] = ...

    assert Model(v={1, 2, '3'}).v == {1, 2, 3}
    assert Model(v=[1, 2, '3']).v == {1, 2, 3}
    with pytest.raises(ValidationError) as exc_info:
        Model(v=[1, 'x'])
    assert """\
error validating input
v:
  invalid literal for int() with base 10: 'x' (error_type=ValueError track=int index=1)""" == str(exc_info.value)


class DictModel(BaseModel):
    v: Dict[str, int] = ...


def test_dict_values():
    assert DictModel(v={'foo': 1}).values() == {'v': {'foo': 1}}


@pytest.mark.parametrize('value,result', [
    ({'a': 2, 'b': 4}, {'a': 2, 'b': 4}),
    ({1: '2', 'b': 4}, {'1': 2, 'b': 4}),
    ([('a', 2), ('b', 4)], {'a': 2, 'b': 4}),
])
def test_typed_dict(value, result):
    assert DictModel(v=value).v == result


@pytest.mark.parametrize('value,error', [
    (
        1,
        """\
error validating input
v:
  'int' object is not iterable (error_type=TypeError)"""
    ),
    (
        {'a': 'b'},
        """\
error validating input
v:
  invalid literal for int() with base 10: 'b' (error_type=ValueError track=int index=a)"""
    ),
    (
        [1, 2, 3],
        """\
error validating input
v:
  cannot convert dictionary update sequence element #0 to a sequence (error_type=TypeError)""",
    )
])
def test_typed_dict_error(value, error):
    with pytest.raises(ValidationError) as exc_info:
        DictModel(v=value)
    assert error == str(exc_info.value)


def test_dict_key_error():
    class DictIntModel(BaseModel):
        v: Dict[int, int] = ...
    assert DictIntModel(v={1: 2, '3': '4'}).v == {1: 2, 3: 4}
    with pytest.raises(ValidationError) as exc_info:
        DictIntModel(v={'foo': 2, '3': '4'})
    assert """\
error validating input
v:
  invalid literal for int() with base 10: 'foo' (error_type=ValueError track=int index=key)""" == str(exc_info.value)


# TODO re-add when implementing better model validators
# def test_all_model_validator():
#     class OverModel(BaseModel):
#         a: int = ...
#
#         def validate_a_pre(self, v):
#             return f'{v}1'
#
#         def validate_a(self, v):
#             assert isinstance(v, int)
#             return f'{v}_main'
#
#         def validate_a_post(self, v):
#             assert isinstance(v, str)
#             return f'{v}_post'
#
#     m = OverModel(a=1)
#     assert m.a == '11_main_post'


class SubModel(BaseModel):
    name: str = ...
    count: int = None


class MasterListModel(BaseModel):
    v: List[SubModel] = []


def test_recursive_list():
    m = MasterListModel(v=[])
    assert m.v == []

    m = MasterListModel(v=[{'name': 'testing', 'count': 4}])
    assert "<MasterListModel v=[<SubModel name='testing' count=4>]>" == repr(m)
    assert m.v[0].name == 'testing'
    assert m.v[0].count == 4
    assert m.values() == {'v': [{'count': 4, 'name': 'testing'}]}

    with pytest.raises(ValidationError) as exc_info:
        MasterListModel(v=['x'])
    print(exc_info.value.json())
    assert 'dictionary update sequence element #0 has length 1; 2 is required' in str(exc_info.value)


def test_recursive_list_error():
    with pytest.raises(ValidationError) as exc_info:
        MasterListModel(v=[{}])

    assert """\
error validating input
v:
  error validating input (error_type=ValidationError track=SubModel)
    name:
      field required (error_type=Missing)\
""" == str(exc_info.value)
    assert """\
{
  "v": [
    {
      "error_details": {
        "name": {
          "error_msg": "field required",
          "error_type": "Missing",
          "index": null,
          "track": null
        }
      },
      "error_msg": "error validating input",
      "error_type": "ValidationError",
      "index": 0,
      "track": "SubModel"
    }
  ]
}""" == exc_info.value.json(2)


def test_list_unions():
    class Model(BaseModel):
        v: List[Union[int, str]] = ...

    assert Model(v=[123, '456', 'foobar']).v == [123, 456, 'foobar']

    with pytest.raises(ValidationError) as exc_info:
        Model(v=[1, 2, None])
    assert """\
error validating input
v:
  int() argument must be a string, a bytes-like object or a number, not 'NoneType' \
(error_type=TypeError track=int index=2)
  None is not an allow value (error_type=TypeError track=str index=2)\
""" == str(exc_info.value)


def test_recursive_lists():
    class Model(BaseModel):
        v: List[List[Union[int, float]]] = ...

    assert Model(v=[[1, 2], [3, '4', '4.1']]).v == [[1, 2], [3, 4, 4.1]]
    assert Model.__fields__['v'].sub_fields[0].name == '_v'
    assert len(Model.__fields__['v'].sub_fields) == 1
    assert Model.__fields__['v'].sub_fields[0].sub_fields[0].name == '__v'
    assert len(Model.__fields__['v'].sub_fields[0].sub_fields) == 1
    assert Model.__fields__['v'].sub_fields[0].sub_fields[0].sub_fields[1].name == '__v_float'
    assert len(Model.__fields__['v'].sub_fields[0].sub_fields[0].sub_fields) == 2


class StrEnum(str, Enum):
    a = 'a10'
    b = 'b10'


def test_str_enum():

    class Model(BaseModel):
        v: StrEnum = ...

    assert Model(v='a10').v is StrEnum.a

    with pytest.raises(ValidationError):
        Model(v='different')


def test_any_dict():
    class Model(BaseModel):
        v: Dict[int, Any] = ...
    assert Model(v={1: 'foobar'}).values() == {'v': {1: 'foobar'}}
    assert Model(v={123: 456}).values() == {'v': {123: 456}}
    assert Model(v={2: [1, 2, 3]}).values() == {'v': {2: [1, 2, 3]}}


def test_infer_alias():
    class Model(BaseModel):
        a = 'foobar'

        class Config:
            fields = {'a': '_a'}

    assert Model(_a='different').a == 'different'
    assert repr(Model.__fields__['a']) == ("<Field a (alias '_a'): type='str', default='foobar',"
                                           " required=False, validators=['not_none_validator', 'str_validator',"
                                           " 'anystr_length_validator']>")


def test_alias_error():
    class Model(BaseModel):
        a = 123

        class Config:
            fields = {'a': '_a'}

    assert Model(_a='123').a == 123
    with pytest.raises(ValidationError) as exc_info:
        Model(_a='foo')
    assert """\
error validating input
_a:
  invalid literal for int() with base 10: 'foo' (error_type=ValueError track=int)""" == str(exc_info.value)


def test_annotation_config():
    class Model(BaseModel):
        b: float
        a: int = 10
        _c: str

        class Config:
            fields = {'b': 'foobar'}

    assert list(Model.__fields__.keys()) == ['b', 'a']
    assert [f.alias for f in Model.__fields__.values()] == ['foobar', 'a']
    assert Model(foobar='123').b == 123.0


def test_success_values_include():
    class Model(BaseModel):
        a: int = 1
        b: int = 2
        c: int = 3

    m = Model()
    assert m.values() == {'a': 1, 'b': 2, 'c': 3}
    assert m.values(include={'a'}) == {'a': 1}
    assert m.values(exclude={'a'}) == {'b': 2, 'c': 3}
    assert m.values(include={'a', 'b'}, exclude={'a'}) == {'b': 2}


def test_values_order():
    class Model(BaseModel):
        a: int = 1
        b: int = 2
        c: int = 3

    m = Model(c=30, b=20, a=10)
    assert list(m) == [('a', 10), ('b', 20), ('c', 30)]


def test_inheritance():
    class Foo(BaseModel):
        a: float = ...

    class Bar(Foo):
        x: float = 12.3
        a = 123

    assert Bar().values() == {'x': 12.3, 'a': 123}


def test_invalid_type():
    with pytest.raises(TypeError) as exc_info:
        class Model(BaseModel):
            x: 43 = 123

    assert "error checking inheritance of 43 (type: <class 'int'>)" in str(exc_info)


@pytest.mark.parametrize('value,expected', [
    ('a string', 'a string'),
    (b'some bytes', 'some bytes'),
    (bytearray('foobar', encoding='utf8'), 'foobar'),
    (123, '123'),
    (123.45, '123.45'),
    (Decimal('12.45'), '12.45'),
    (True, 'True'),
    (False, 'False'),
    (StrEnum.a, 'a10'),
])
def test_valid_string_types(value, expected):
    class Model(BaseModel):
        v: str

    assert Model(v=value).v == expected


@pytest.mark.parametrize('value', [
    {'foo': 'bar'},
    {'foo', 'bar'},
    [1, 2, 3],
])
def test_invalid_string_types(value):
    class Model(BaseModel):
        v: str

    with pytest.raises(ValidationError) as exc_info:
        Model(v=value)
    assert 'str or byte type expected' in str(exc_info.value)


def test_inheritance_config():
    class Parent(BaseModel):
        a: int

    class Child(Parent):
        b: str

        class Config:
            fields = {
                'a': 'aaa',
                'b': 'bbb',
            }

    m = Child(aaa=1, bbb='s')
    assert str(m) == "Child a=1 b='s'"


def test_partial_inheritance_config():
    class Parent(BaseModel):
        a: int

        class Config:
            fields = {
                'a': 'aaa',
            }

    class Child(Parent):
        b: str

        class Config:
            fields = {
                'b': 'bbb',
            }

    m = Child(aaa=1, bbb='s')
    assert str(m) == "Child a=1 b='s'"


def test_string_none():
    class Model(BaseModel):
        a: constr(min_length=20, max_length=1000) = ...

        class Config:
            ignore_extra = True

    with pytest.raises(ValidationError) as exc_info:
        Model(a=None)
    assert 'None is not an allow value' in str(exc_info.value)


def test_pretty_error_no_recursion():
    with pytest.raises(TypeError):
        pretty_errors('foobar')