import json
import math
import re
import sys
from collections.abc import Generator
from dataclasses import dataclass as vanilla_dataclass
from datetime import date, datetime, time, timedelta, timezone
from decimal import Decimal
from enum import Enum
from ipaddress import IPv4Address, IPv4Interface, IPv4Network, IPv6Address, IPv6Interface, IPv6Network
from pathlib import Path
from re import Pattern
from typing import Annotated, Any, Optional, Union
from uuid import UUID

import pytest
from pydantic_core import CoreSchema, SchemaSerializer, core_schema

from pydantic import (
    AfterValidator,
    BaseModel,
    ConfigDict,
    GetCoreSchemaHandler,
    GetJsonSchemaHandler,
    NameEmail,
    PlainSerializer,
    RootModel,
    TypeAdapter,
)
from pydantic._internal._config import ConfigWrapper
from pydantic._internal._generate_schema import GenerateSchema
from pydantic.color import Color
from pydantic.dataclasses import dataclass as pydantic_dataclass
from pydantic.deprecated.json import pydantic_encoder, timedelta_isoformat
from pydantic.functional_serializers import (
    field_serializer,
)
from pydantic.json_schema import JsonSchemaValue
from pydantic.types import DirectoryPath, FilePath, SecretBytes, SecretStr, condecimal

try:
    import email_validator
except ImportError:
    email_validator = None


pytestmark = pytest.mark.filterwarnings('ignore::DeprecationWarning')


class MyEnum(Enum):
    foo = 'bar'
    snap = 'crackle'


class MyModel(BaseModel):
    a: str = 'b'
    c: str = 'd'


@pytest.mark.parametrize(
    'ser_type,gen_value,json_output',
    [
        (UUID, lambda: UUID('ebcdab58-6eb8-46fb-a190-d07a33e9eac8'), b'"ebcdab58-6eb8-46fb-a190-d07a33e9eac8"'),
        (IPv4Address, lambda: '192.168.0.1', b'"192.168.0.1"'),
        (Color, lambda: Color('#000'), b'"black"'),
        (Color, lambda: Color((1, 12, 123)), b'"#010c7b"'),
        (SecretStr, lambda: SecretStr('abcd'), b'"**********"'),
        (SecretStr, lambda: SecretStr(''), b'""'),
        (SecretBytes, lambda: SecretBytes(b'xyz'), b'"**********"'),
        (SecretBytes, lambda: SecretBytes(b''), b'""'),
        (IPv6Address, lambda: IPv6Address('::1:0:1'), b'"::1:0:1"'),
        (IPv4Interface, lambda: IPv4Interface('192.168.0.0/24'), b'"192.168.0.0/24"'),
        (IPv6Interface, lambda: IPv6Interface('2001:db00::/120'), b'"2001:db00::/120"'),
        (IPv4Network, lambda: IPv4Network('192.168.0.0/24'), b'"192.168.0.0/24"'),
        (IPv6Network, lambda: IPv6Network('2001:db00::/120'), b'"2001:db00::/120"'),
        (datetime, lambda: datetime(2032, 1, 1, 1, 1), b'"2032-01-01T01:01:00"'),
        (datetime, lambda: datetime(2032, 1, 1, 1, 1, tzinfo=timezone.utc), b'"2032-01-01T01:01:00Z"'),
        (datetime, lambda: datetime(2032, 1, 1), b'"2032-01-01T00:00:00"'),
        (time, lambda: time(12, 34, 56), b'"12:34:56"'),
        (timedelta, lambda: timedelta(days=12, seconds=34, microseconds=56), b'"P12DT34.000056S"'),
        (timedelta, lambda: timedelta(seconds=-1), b'"-PT1S"'),
        (set, lambda: {1, 2, 3}, b'[1,2,3]'),
        (frozenset, lambda: frozenset([1, 2, 3]), b'[1,2,3]'),
        (Generator[int, None, None], lambda: (v for v in range(4)), b'[0,1,2,3]'),
        (bytes, lambda: b'this is bytes', b'"this is bytes"'),
        (Decimal, lambda: Decimal('12.34'), b'"12.34"'),
        (MyModel, lambda: MyModel(), b'{"a":"b","c":"d"}'),
        (MyEnum, lambda: MyEnum.foo, b'"bar"'),
        (Pattern, lambda: re.compile('^regex$'), b'"^regex$"'),
    ],
)
def test_json_serialization(ser_type, gen_value, json_output):
    ta: TypeAdapter[Any] = TypeAdapter(ser_type)
    assert ta.dump_json(gen_value()) == json_output


@pytest.mark.skipif(not email_validator, reason='email_validator not installed')
def test_json_serialization_email():
    config_wrapper = ConfigWrapper({'arbitrary_types_allowed': False})
    gen = GenerateSchema(config_wrapper, None)
    schema = gen.generate_schema(NameEmail)
    serializer = SchemaSerializer(schema)
    assert serializer.to_json(NameEmail('foo bar', 'foobaR@example.com')) == b'"foo bar <foobaR@example.com>"'


@pytest.mark.skipif(sys.platform.startswith('win'), reason='paths look different on windows')
def test_path_encoding(tmpdir):
    class PathModel(BaseModel):
        path: Path
        file_path: FilePath
        dir_path: DirectoryPath

    tmpdir = Path(tmpdir)
    file_path = tmpdir / 'bar'
    file_path.touch()
    dir_path = tmpdir / 'baz'
    dir_path.mkdir()
    model = PathModel(path=Path('/path/test/example/'), file_path=file_path, dir_path=dir_path)
    expected = f'{{"path": "/path/test/example", "file_path": "{file_path}", "dir_path": "{dir_path}"}}'
    assert json.dumps(model, default=pydantic_encoder) == expected


def test_model_encoding():
    class ModelA(BaseModel):
        x: int
        y: str

    class Model(BaseModel):
        a: float
        b: bytes
        c: Decimal
        d: ModelA

    m = Model(a=10.2, b='foobar', c='10.2', d={'x': 123, 'y': '123'})
    assert m.model_dump() == {'a': 10.2, 'b': b'foobar', 'c': Decimal('10.2'), 'd': {'x': 123, 'y': '123'}}
    assert m.model_dump_json() == '{"a":10.2,"b":"foobar","c":"10.2","d":{"x":123,"y":"123"}}'
    assert m.model_dump_json(exclude={'b'}) == '{"a":10.2,"c":"10.2","d":{"x":123,"y":"123"}}'


def test_subclass_encoding():
    class SubDate(datetime):
        @classmethod
        def __get_pydantic_core_schema__(cls, source_type: Any, handler: GetCoreSchemaHandler) -> CoreSchema:
            def val(v: datetime) -> SubDate:
                return SubDate.fromtimestamp(v.timestamp())

            return core_schema.no_info_after_validator_function(val, handler(datetime))

    class Model(BaseModel):
        a: datetime
        b: SubDate

    m = Model(a=datetime(2032, 1, 1, 1, 1), b=SubDate(2020, 2, 29, 12, 30))
    assert m.model_dump() == {'a': datetime(2032, 1, 1, 1, 1), 'b': SubDate(2020, 2, 29, 12, 30)}
    assert m.model_dump_json() == '{"a":"2032-01-01T01:01:00","b":"2020-02-29T12:30:00"}'


def test_subclass_custom_encoding():
    class SubDt(datetime):
        @classmethod
        def __get_pydantic_core_schema__(cls, source_type: Any, handler: GetCoreSchemaHandler) -> CoreSchema:
            def val(v: datetime) -> SubDt:
                return SubDt.fromtimestamp(v.timestamp())

            return core_schema.no_info_after_validator_function(val, handler(datetime))

    class SubDelta(timedelta):
        @classmethod
        def __get_pydantic_core_schema__(cls, source_type: Any, handler: GetCoreSchemaHandler) -> CoreSchema:
            def val(v: timedelta) -> SubDelta:
                return cls(seconds=v.total_seconds())

            return core_schema.no_info_after_validator_function(val, handler(timedelta))

    class Model(BaseModel):
        a: SubDt
        b: SubDelta

        @field_serializer('a', when_used='json')
        def serialize_a(self, v: SubDt, _info):
            return v.strftime('%a, %d %b %C %H:%M:%S')

        model_config = ConfigDict(ser_json_timedelta='float')

    m = Model(a=SubDt(2032, 1, 1, 1, 1), b=SubDelta(hours=100))
    assert m.model_dump() == {'a': SubDt(2032, 1, 1, 1, 1), 'b': SubDelta(days=4, seconds=14400)}
    assert m.model_dump(mode='json') == {'a': 'Thu, 01 Jan 20 01:01:00', 'b': 360000.0}
    assert m.model_dump_json() == '{"a":"Thu, 01 Jan 20 01:01:00","b":360000.0}'


def test_invalid_model():
    class Foo:
        pass

    with pytest.raises(TypeError):
        json.dumps(Foo, default=pydantic_encoder)


@pytest.mark.parametrize(
    'input,output',
    [
        (timedelta(days=12, seconds=34, microseconds=56), 'P12DT0H0M34.000056S'),
        (timedelta(days=1001, hours=1, minutes=2, seconds=3, microseconds=654_321), 'P1001DT1H2M3.654321S'),
        (timedelta(seconds=-1), '-P1DT23H59M59.000000S'),
        (timedelta(), 'P0DT0H0M0.000000S'),
    ],
)
def test_iso_timedelta(input, output):
    assert output == timedelta_isoformat(input)


def test_custom_encoder():
    class Model(BaseModel):
        x: timedelta
        y: Decimal
        z: date

        @field_serializer('x')
        def serialize_x(self, v: timedelta, _info):
            return f'{v.total_seconds():0.3f}s'

        @field_serializer('y')
        def serialize_y(self, v: Decimal, _info):
            return 'a decimal'

    assert Model(x=123, y=5, z='2032-06-01').model_dump_json() == '{"x":"123.000s","y":"a decimal","z":"2032-06-01"}'


def test_iso_timedelta_simple():
    class Model(BaseModel):
        x: timedelta

    m = Model(x=123)
    json_data = m.model_dump_json()
    assert json_data == '{"x":"PT2M3S"}'
    assert Model.model_validate_json(json_data).x == timedelta(seconds=123)


def test_con_decimal_encode() -> None:
    """
    Makes sure a decimal with decimal_places = 0, as well as one with places
    can handle a encode/decode roundtrip.
    """

    class Obj(BaseModel):
        id: condecimal(gt=0, max_digits=22, decimal_places=0)
        price: Decimal = Decimal('0.01')

    json_data = '{"id":"1","price":"0.01"}'
    assert Obj(id=1).model_dump_json() == json_data
    assert Obj.model_validate_json(json_data) == Obj(id=1)


def test_json_encoder_simple_inheritance():
    class Parent(BaseModel):
        dt: datetime = datetime.now()
        timedt: timedelta = timedelta(hours=100)

        @field_serializer('dt')
        def serialize_dt(self, _v: datetime, _info):
            return 'parent_encoder'

    class Child(Parent):
        @field_serializer('timedt')
        def serialize_timedt(self, _v: timedelta, _info):
            return 'child_encoder'

    assert Child().model_dump_json() == '{"dt":"parent_encoder","timedt":"child_encoder"}'


def test_encode_dataclass():
    @vanilla_dataclass
    class Foo:
        bar: int
        spam: str

    f = Foo(bar=123, spam='apple pie')
    assert '{"bar": 123, "spam": "apple pie"}' == json.dumps(f, default=pydantic_encoder)


def test_encode_pydantic_dataclass():
    @pydantic_dataclass
    class Foo:
        bar: int
        spam: str

    f = Foo(bar=123, spam='apple pie')
    assert json.dumps(f, default=pydantic_encoder) == '{"bar": 123, "spam": "apple pie"}'


def test_json_nested_encode_models():
    class Phone(BaseModel):
        manufacturer: str
        number: int

    class User(BaseModel):
        name: str
        SSN: int
        birthday: datetime
        phone: Phone
        friend: Optional['User'] = None

        @field_serializer('birthday')
        def serialize_birthday(self, v: datetime, _info):
            return v.timestamp()

        @field_serializer('phone', when_used='unless-none')
        def serialize_phone(self, v: Phone, _info):
            return v.number

        @field_serializer('friend', when_used='unless-none')
        def serialize_user(self, v, _info):
            return v.SSN

    User.model_rebuild()

    iphone = Phone(manufacturer='Apple', number=18002752273)
    galaxy = Phone(manufacturer='Samsung', number=18007267864)

    timon = User(name='Timon', SSN=123, birthday=datetime(1993, 6, 1, tzinfo=timezone.utc), phone=iphone)
    pumbaa = User(name='Pumbaa', SSN=234, birthday=datetime(1993, 5, 15, tzinfo=timezone.utc), phone=galaxy)

    timon.friend = pumbaa

    assert iphone.model_dump_json() == '{"manufacturer":"Apple","number":18002752273}'
    assert (
        pumbaa.model_dump_json()
        == '{"name":"Pumbaa","SSN":234,"birthday":737424000.0,"phone":18007267864,"friend":null}'
    )
    assert (
        timon.model_dump_json() == '{"name":"Timon","SSN":123,"birthday":738892800.0,"phone":18002752273,"friend":234}'
    )


def test_custom_encode_fallback_basemodel():
    class MyExoticType:
        pass

    class Foo(BaseModel):
        x: MyExoticType

        @field_serializer('x')
        def serialize_x(self, _v: MyExoticType, _info):
            return 'exo'

        model_config = ConfigDict(arbitrary_types_allowed=True)

    class Bar(BaseModel):
        foo: Foo

    assert Bar(foo=Foo(x=MyExoticType())).model_dump_json() == '{"foo":{"x":"exo"}}'


def test_recursive(create_module):
    module = create_module(
        # language=Python
        """
from __future__ import annotations
from typing import Optional
from pydantic import BaseModel

class Model(BaseModel):
    value: int
    nested: Optional[Model] = None
"""
    )
    M = module.Model

    assert M(value=1, nested=M(value=2)).model_dump_json(exclude_none=True) == '{"value":1,"nested":{"value":2}}'


def test_resolve_ref_schema_recursive_model():
    class Model(BaseModel):
        mini_me: Union['Model', None]

        @classmethod
        def __get_pydantic_json_schema__(
            cls, core_schema: CoreSchema, handler: GetJsonSchemaHandler
        ) -> JsonSchemaValue:
            json_schema = super().__get_pydantic_json_schema__(core_schema, handler)
            json_schema = handler.resolve_ref_schema(json_schema)
            json_schema['examples'] = [{'foo': {'mini_me': None}}]
            return json_schema

    # insert_assert(Model.model_json_schema())
    assert Model.model_json_schema() == {
        '$defs': {
            'Model': {
                'examples': [{'foo': {'mini_me': None}}],
                'properties': {'mini_me': {'anyOf': [{'$ref': '#/$defs/Model'}, {'type': 'null'}]}},
                'required': ['mini_me'],
                'title': 'Model',
                'type': 'object',
            }
        },
        '$ref': '#/$defs/Model',
    }


def test_custom_json_encoder_config():
    class Model(BaseModel):
        x: timedelta
        y: Decimal
        z: date

        model_config = ConfigDict(
            json_encoders={timedelta: lambda v: f'{v.total_seconds():0.3f}s', Decimal: lambda v: 'a decimal'}
        )

    assert json.loads(Model(x=123, y=5, z='2032-06-01').model_dump_json()) == {
        'x': '123.000s',
        'y': 'a decimal',
        'z': '2032-06-01',
    }


def test_custom_iso_timedelta():
    class Model(BaseModel):
        x: timedelta
        model_config = ConfigDict(json_encoders={timedelta: lambda _: 'P0DT0H2M3.000000S'})

    m = Model(x=321)
    assert json.loads(m.model_dump_json()) == {'x': 'P0DT0H2M3.000000S'}


def test_json_encoders_config_simple_inheritance():
    """json_encoders is not "inheritable", this is different than v1 but much simpler"""

    class Parent(BaseModel):
        dt: datetime = datetime.now()
        timedt: timedelta = timedelta(hours=100)

        model_config = ConfigDict(json_encoders={timedelta: lambda _: 'parent_encoder'})

    class Child(Parent):
        model_config = ConfigDict(json_encoders={datetime: lambda _: 'child_encoder'})

    # insert_assert(Child().model_dump())
    assert json.loads(Child().model_dump_json()) == {'dt': 'child_encoder', 'timedt': 'P4DT4H'}


def test_custom_iso_timedelta_annotated():
    class Model(BaseModel):
        # the json_encoders config applies to the type but the annotation overrides it
        y: timedelta
        x: Annotated[timedelta, AfterValidator(lambda x: x), PlainSerializer(lambda _: 'P0DT0H1M2.000000S')]
        model_config = ConfigDict(json_encoders={timedelta: lambda _: 'P0DT0H2M3.000000S'})

    m = Model(x=321, y=456)
    assert json.loads(m.model_dump_json()) == {'x': 'P0DT0H1M2.000000S', 'y': 'P0DT0H2M3.000000S'}


def test_json_encoders_on_model() -> None:
    """Make sure that applying json_encoders to a BaseModel
    does not edit its schema in place.
    """

    class Model(BaseModel):
        x: int

    class Outer1(BaseModel):
        m: Model
        model_config = ConfigDict(json_encoders={Model: lambda x: 'encoded!'})

    class Outer2(BaseModel):
        m: Model

    class Outermost(BaseModel):
        inner: Union[Outer1, Outer2]

    m = Outermost(inner=Outer1(m=Model(x=1)))
    # insert_assert(m.model_dump())
    assert json.loads(m.model_dump_json()) == {'inner': {'m': 'encoded!'}}

    m = Outermost(inner=Outer2(m=Model(x=1)))
    # insert_assert(m.model_dump())
    assert json.loads(m.model_dump_json()) == {'inner': {'m': {'x': 1}}}


def test_json_encoders_not_used_for_python_dumps() -> None:
    class Model(BaseModel):
        x: int
        model_config = ConfigDict(json_encoders={int: lambda x: 'encoded!'})

    m = Model(x=1)
    assert m.model_dump() == {'x': 1}
    assert m.model_dump_json() == '{"x":"encoded!"}'


def test_json_encoders_types() -> None:
    class MyEnum(Enum):
        A = 'a'
        B = 'b'

    class A(BaseModel):
        a: MyEnum
        b: list[int]
        c: Decimal
        model_config = ConfigDict(
            json_encoders={Enum: lambda val: val.name, list[int]: lambda val: 'list!', Decimal: lambda val: 'decimal!'}
        )

    m = A(a=MyEnum.A, b=[1, 2, 3], c=Decimal('0'))
    assert m.model_dump_json() == '{"a":"A","b":"list!","c":"decimal!"}'
    assert m.model_dump() == {'a': MyEnum.A, 'b': [1, 2, 3], 'c': Decimal('0')}


@pytest.mark.parametrize(
    'float_value,encoded_str',
    [
        (float('inf'), 'Infinity'),
        (float('-inf'), '-Infinity'),
        (float('nan'), 'NaN'),
    ],
)
def test_json_inf_nan_allow(float_value, encoded_str):
    class R(RootModel[float]):
        model_config = ConfigDict(ser_json_inf_nan='strings')

    r = R(float_value)
    r_encoded = f'"{encoded_str}"'
    assert r.model_dump_json() == r_encoded
    if math.isnan(float_value):
        assert math.isnan(R.model_validate_json(r_encoded).root)
    else:
        assert R.model_validate_json(r_encoded) == r

    class M(BaseModel):
        f: float
        model_config = R.model_config

    m = M(f=float_value)
    m_encoded = f'{{"f":{r_encoded}}}'
    assert m.model_dump_json() == m_encoded
    if math.isnan(float_value):
        assert math.isnan(M.model_validate_json(m_encoded).f)
    else:
        assert M.model_validate_json(m_encoded) == m


def test_json_bytes_base64_round_trip():
    class R(RootModel[bytes]):
        model_config = ConfigDict(ser_json_bytes='base64', val_json_bytes='base64')

    r = R(b'hello')
    r_encoded = '"aGVsbG8="'
    assert r.model_dump_json() == r_encoded
    assert R.model_validate_json(r_encoded) == r

    class M(BaseModel):
        key: bytes
        model_config = R.model_config

    m = M(key=b'hello')
    m_encoded = f'{{"key":{r_encoded}}}'
    assert m.model_dump_json() == m_encoded
    assert M.model_validate_json(m_encoded) == m


def test_json_bytes_hex_round_trip():
    class R(RootModel[bytes]):
        model_config = ConfigDict(ser_json_bytes='hex', val_json_bytes='hex')

    r = R(b'hello')
    r_encoded = '"68656c6c6f"'
    assert r.model_dump_json() == r_encoded
    assert R.model_validate_json(r_encoded) == r

    class M(BaseModel):
        key: bytes
        model_config = R.model_config

    m = M(key=b'hello')
    m_encoded = f'{{"key":{r_encoded}}}'
    assert m.model_dump_json() == m_encoded
    assert M.model_validate_json(m_encoded) == m


# Complete tests exist in pydantic-core:
def test_json_ensure_ascii() -> None:
    ta = TypeAdapter(str)

    assert ta.dump_json('à', ensure_ascii=True) == b'"\\u00e0"'

    class Model(BaseModel):
        f: str

    assert Model(f='à').model_dump_json(ensure_ascii=True) == '{"f":"\\u00e0"}'