from decimal import Decimal
from typing import Literal

import pytest
from pydantic import ValidationError
from sqlmodel import Field, SQLModel


def test_decimal():
    class Model(SQLModel):
        dec: Decimal = Field(max_digits=4, decimal_places=2)

    Model(dec=Decimal("3.14"))
    Model(dec=Decimal("69.42"))

    with pytest.raises(ValidationError):
        Model(dec=Decimal("3.142"))
    with pytest.raises(ValidationError):
        Model(dec=Decimal("0.069"))
    with pytest.raises(ValidationError):
        Model(dec=Decimal("420"))


def test_discriminator():
    # Example adapted from
    # [Pydantic docs](https://pydantic-docs.helpmanual.io/usage/types/#discriminated-unions-aka-tagged-unions):

    class Cat(SQLModel):
        pet_type: Literal["cat"]
        meows: int

    class Dog(SQLModel):
        pet_type: Literal["dog"]
        barks: float

    class Lizard(SQLModel):
        pet_type: Literal["reptile", "lizard"]
        scales: bool

    class Model(SQLModel):
        pet: Cat | Dog | Lizard = Field(..., discriminator="pet_type")
        n: int

    Model(pet={"pet_type": "dog", "barks": 3.14}, n=1)  # type: ignore[arg-type]

    with pytest.raises(ValidationError):
        Model(pet={"pet_type": "dog"}, n=1)  # type: ignore[arg-type]


def test_repr():
    class Model(SQLModel):
        id: int | None = Field(primary_key=True)
        foo: str = Field(repr=False)

    instance = Model(id=123, foo="bar")
    assert "foo=" not in repr(instance)


def test_exclude():
    class Model(SQLModel):
        id: int
        name: str
        value: int = Field(exclude=True)

    instance = Model(id=1, name="test", value=42)
    dict_representation = instance.model_dump()
    assert "id" in dict_representation
    assert "name" in dict_representation
    assert "value" not in dict_representation


def test_include_is_deprecated():
    with pytest.warns(
        DeprecationWarning,
        match="`include` is deprecated and does nothing. It will be removed, use `exclude` instead",
    ):

        class Model(SQLModel):
            values: list[int] = Field(include=True)