import dataclasses
from typing import TYPE_CHECKING, Any, List, Optional, Type, cast
from uuid import UUID

import pytest
from typing_extensions import Annotated, NewType

from litestar import Controller, Litestar, Router, get
from litestar._openapi.datastructures import OpenAPIContext
from litestar._openapi.parameters import ParameterFactory
from litestar._openapi.schema_generation.examples import ExampleFactory
from litestar._openapi.typescript_converter.schema_parsing import is_schema_value
from litestar.di import Provide
from litestar.enums import ParamType
from litestar.exceptions import ImproperlyConfiguredException
from litestar.handlers import HTTPRouteHandler
from litestar.openapi import OpenAPIConfig
from litestar.openapi.spec import Example, OpenAPI, Reference, Schema
from litestar.openapi.spec.enums import OpenAPIType
from litestar.params import Dependency, Parameter
from litestar.routes import BaseRoute
from litestar.testing import create_test_client
from litestar.utils import find_index
from tests.unit.test_openapi.utils import Gender, LuckyNumber

if TYPE_CHECKING:
    from litestar.openapi.spec.parameter import Parameter as OpenAPIParameter


def create_factory(route: BaseRoute, handler: HTTPRouteHandler) -> ParameterFactory:
    return ParameterFactory(
        OpenAPIContext(
            openapi_config=OpenAPIConfig(title="Test API", version="1.0.0", create_examples=True), plugins=[]
        ),
        route_handler=handler,
        path_parameters=route.path_parameters,
    )


def _create_parameters(app: Litestar, path: str) -> List["OpenAPIParameter"]:
    index = find_index(app.routes, lambda x: x.path_format == path)
    route = app.routes[index]
    route_handler = route.route_handler_map["GET"][0]  # type: ignore[union-attr]
    handler = route_handler.fn
    assert callable(handler)
    return create_factory(route, route_handler).create_parameters_for_handler()


def test_create_parameters(person_controller: Type[Controller]) -> None:
    ExampleFactory.seed_random(10)

    parameters = _create_parameters(app=Litestar(route_handlers=[person_controller]), path="/{service_id}/person")
    assert len(parameters) == 10
    service_id, page, name, page_size, from_date, to_date, gender, lucky_number, secret_header, cookie_value = tuple(
        parameters
    )

    assert service_id.name == "service_id"
    assert service_id.param_in == ParamType.PATH
    assert is_schema_value(service_id.schema)
    assert service_id.schema.type == OpenAPIType.INTEGER
    assert service_id.required
    assert service_id.schema.examples

    assert page.param_in == ParamType.QUERY
    assert page.name == "page"
    assert is_schema_value(page.schema)
    assert page.schema.type == OpenAPIType.INTEGER
    assert page.required
    assert page.schema.examples

    assert page_size.param_in == ParamType.QUERY
    assert page_size.name == "pageSize"
    assert is_schema_value(page_size.schema)
    assert page_size.schema.type == OpenAPIType.INTEGER
    assert page_size.required
    assert page_size.description == "Page Size Description"
    assert page_size.examples
    assert page_size.schema.examples == [1]

    assert name.param_in == ParamType.QUERY
    assert name.name == "name"
    assert is_schema_value(name.schema)
    assert name.schema.one_of
    assert len(name.schema.one_of) == 3
    assert not name.required
    assert name.schema.examples

    assert from_date.param_in == ParamType.QUERY
    assert from_date.name == "from_date"
    assert is_schema_value(from_date.schema)
    assert from_date.schema.one_of
    assert len(from_date.schema.one_of) == 4
    assert not from_date.required
    assert from_date.schema.examples

    assert to_date.param_in == ParamType.QUERY
    assert to_date.name == "to_date"
    assert is_schema_value(to_date.schema)
    assert to_date.schema.one_of
    assert len(to_date.schema.one_of) == 4
    assert not to_date.required
    assert to_date.schema.examples

    assert gender.param_in == ParamType.QUERY
    assert gender.name == "gender"
    assert is_schema_value(gender.schema)
    assert gender.schema == Schema(
        one_of=[
            Reference(ref="#/components/schemas/tests_unit_test_openapi_utils_Gender"),
            Schema(
                type=OpenAPIType.ARRAY,
                items=Reference(ref="#/components/schemas/tests_unit_test_openapi_utils_Gender"),
                examples=[[Gender.FEMALE]],
            ),
            Schema(type=OpenAPIType.NULL),
        ],
        examples=[Gender.MALE, [Gender.MALE, Gender.OTHER]],
    )
    assert not gender.required

    assert secret_header.param_in == ParamType.HEADER
    assert is_schema_value(secret_header.schema)
    assert secret_header.schema.type == OpenAPIType.STRING
    assert secret_header.required
    assert secret_header.schema.examples

    assert cookie_value.param_in == ParamType.COOKIE
    assert is_schema_value(cookie_value.schema)
    assert cookie_value.schema.type == OpenAPIType.INTEGER
    assert cookie_value.required
    assert cookie_value.schema.examples

    assert lucky_number.param_in == ParamType.QUERY
    assert lucky_number.name == "lucky_number"
    assert is_schema_value(lucky_number.schema)
    assert lucky_number.schema == Schema(
        one_of=[
            Reference(ref="#/components/schemas/tests_unit_test_openapi_utils_LuckyNumber"),
            Schema(type=OpenAPIType.NULL),
        ],
        examples=[LuckyNumber.SEVEN],
    )
    assert not lucky_number.required


def test_deduplication_for_param_where_key_and_type_are_equal() -> None:
    class BaseDep:
        def __init__(self, query_param: str) -> None: ...

    class ADep(BaseDep): ...

    class BDep(BaseDep): ...

    async def c_dep(other_param: float) -> float:
        return other_param

    async def d_dep(other_param: float) -> float:
        return other_param

    @get(
        "/test",
        dependencies={
            "a": Provide(ADep, sync_to_thread=False),
            "b": Provide(BDep, sync_to_thread=False),
            "c": Provide(c_dep),
            "d": Provide(d_dep),
        },
    )
    def handler(a: ADep, b: BDep, c: float, d: float) -> str:
        return "OK"

    app = Litestar(route_handlers=[handler])
    assert isinstance(app.openapi_schema, OpenAPI)
    open_api_path_item = app.openapi_schema.paths["/test"]  # type: ignore[index]
    open_api_parameters = open_api_path_item.get.parameters  # type: ignore[union-attr]
    assert len(open_api_parameters) == 2  # type: ignore[arg-type]
    assert {p.name for p in open_api_parameters} == {"query_param", "other_param"}  # type: ignore[union-attr]


def test_raise_for_multiple_parameters_of_same_name_and_differing_types() -> None:
    async def a_dep(query_param: int) -> int:
        return query_param

    async def b_dep(query_param: str) -> int:
        return 1

    @get("/test", dependencies={"a": Provide(a_dep), "b": Provide(b_dep)})
    def handler(a: int, b: int) -> str:
        return "OK"

    app = Litestar(route_handlers=[handler])

    with pytest.raises(ImproperlyConfiguredException):
        app.openapi_schema


def test_dependency_params_in_docs_if_dependency_provided() -> None:
    async def produce_dep(param: str) -> int:
        return 13

    @get(dependencies={"dep": Provide(produce_dep)})
    def handler(dep: Optional[int] = Dependency()) -> None:
        return None

    app = Litestar(route_handlers=[handler])
    param_name_set = {p.name for p in cast("OpenAPI", app.openapi_schema).paths["/"].get.parameters}  # type: ignore[index, redundant-cast, union-attr]
    assert "dep" not in param_name_set
    assert "param" in param_name_set


def test_dependency_not_in_doc_params_if_not_provided() -> None:
    @get()
    def handler(dep: Optional[int] = Dependency()) -> None:
        return None

    app = Litestar(route_handlers=[handler])
    assert cast("OpenAPI", app.openapi_schema).paths["/"].get.parameters is None  # type: ignore[index, redundant-cast, union-attr]


def test_non_dependency_in_doc_params_if_not_provided() -> None:
    @get()
    def handler(param: Optional[int]) -> None:
        return None

    app = Litestar(route_handlers=[handler])
    param_name_set = {p.name for p in cast("OpenAPI", app.openapi_schema).paths["/"].get.parameters}  # type: ignore[index, redundant-cast, union-attr]
    assert "param" in param_name_set


def test_layered_parameters() -> None:
    class MyController(Controller):
        path = "/controller"
        parameters = {
            "controller1": Parameter(lt=100),
            "controller2": Parameter(str, query="controller3"),
        }

        @get("/{local:int}")
        def my_handler(
            self,
            local: int,
            controller1: int,
            router1: str,
            router2: float,
            app1: str,
            app2: List[str],
            controller2: float = Parameter(float, ge=5.0),
        ) -> dict:
            return {}

    router = Router(
        path="/router",
        route_handlers=[MyController],
        parameters={
            "router1": Parameter(str, pattern="^[a-zA-Z]$"),
            "router2": Parameter(float, multiple_of=5.0, header="router3"),
        },
    )

    parameters = _create_parameters(
        app=Litestar(
            route_handlers=[router],
            parameters={
                "app1": Parameter(str, cookie="app4"),
                "app2": Parameter(List[str], min_items=2),
                "app3": Parameter(bool, required=False),
            },
        ),
        path="/router/controller/{local}",
    )
    local, app3, controller1, router1, router3, app4, app2, controller3 = tuple(parameters)

    assert app4.param_in == ParamType.COOKIE
    assert app4.schema.type == OpenAPIType.STRING  # type: ignore[union-attr]
    assert app4.required
    assert app4.schema.examples  # type: ignore[union-attr]

    assert app2.param_in == ParamType.QUERY
    assert app2.schema.type == OpenAPIType.ARRAY  # type: ignore[union-attr]
    assert app2.required
    assert app2.schema.examples  # type: ignore[union-attr]

    assert app3.param_in == ParamType.QUERY
    assert app3.schema.type == OpenAPIType.BOOLEAN  # type: ignore[union-attr]
    assert not app3.required
    assert app3.schema.examples  # type: ignore[union-attr]

    assert router1.param_in == ParamType.QUERY
    assert router1.schema.type == OpenAPIType.STRING  # type: ignore[union-attr]
    assert router1.required
    assert router1.schema.pattern == "^[a-zA-Z]$"  # type: ignore[union-attr]
    assert router1.schema.examples  # type: ignore[union-attr]

    assert router3.param_in == ParamType.HEADER
    assert router3.schema.type == OpenAPIType.NUMBER  # type: ignore[union-attr]
    assert router3.required
    assert router3.schema.multiple_of == 5.0  # type: ignore[union-attr]
    assert router3.schema.examples  # type: ignore[union-attr]

    assert controller1.param_in == ParamType.QUERY
    assert controller1.schema.type == OpenAPIType.INTEGER  # type: ignore[union-attr]
    assert controller1.required
    assert controller1.schema.exclusive_maximum == 100.0  # type: ignore[union-attr]
    assert controller1.schema.examples  # type: ignore[union-attr]

    assert controller3.param_in == ParamType.QUERY
    assert controller3.schema.type == OpenAPIType.NUMBER  # type: ignore[union-attr]
    assert controller3.required
    assert controller3.schema.minimum == 5.0  # type: ignore[union-attr]
    assert controller3.schema.examples  # type: ignore[union-attr]

    assert local.param_in == ParamType.PATH
    assert local.schema.type == OpenAPIType.INTEGER  # type: ignore[union-attr]
    assert local.required
    assert local.schema.examples  # type: ignore[union-attr]


def test_parameter_examples() -> None:
    @get(path="/")
    async def index(
        text: Annotated[str, Parameter(examples=[Example(value="example value", summary="example summary")])],
    ) -> str:
        return text

    with create_test_client(
        route_handlers=[index], openapi_config=OpenAPIConfig(title="Test API", version="1.0.0")
    ) as client:
        response = client.get("/schema/openapi.json")
        assert response.json()["paths"]["/"]["get"]["parameters"][0]["examples"] == {
            "text-example-1": {"summary": "example summary", "value": "example value"}
        }


def test_parameter_schema_extra() -> None:
    @get()
    async def handler(
        query1: Annotated[
            str,
            Parameter(
                schema_extra={
                    "schema_not": Schema(
                        any_of=[
                            Schema(type=OpenAPIType.STRING, pattern=r"^somePrefix:.*$"),
                            Schema(type=OpenAPIType.STRING, enum=["denied", "values"]),
                        ]
                    ),
                }
            ),
        ],
        query2: Annotated[
            Gender,
            Parameter(description="gender description", schema_extra={"format": "foo"}, schema_component_key="q2"),
        ],
        query3: Annotated[Gender, Parameter(schema_extra={"format": "bar"}, schema_component_key="q3")],
    ) -> Any:
        return query1

    @get()
    async def error_handler(query1: Annotated[str, Parameter(schema_extra={"invalid": "dummy"})]) -> Any:
        return query1

    # Success
    app = Litestar([handler])
    schema = app.openapi_schema.to_schema()
    assert schema["paths"]["/"]["get"]["parameters"][0]["schema"]["not"] == {
        "anyOf": [
            {"type": "string", "pattern": r"^somePrefix:.*$"},
            {"type": "string", "enum": ["denied", "values"]},
        ]
    }
    assert schema["paths"]["/"]["get"]["parameters"][1]["schema"]["$ref"] == "#/components/schemas/q2"
    assert schema["paths"]["/"]["get"]["parameters"][1]["description"] == "gender description"
    assert schema["components"]["schemas"]["q2"]["format"] == "foo"
    assert schema["paths"]["/"]["get"]["parameters"][2]["schema"]["$ref"] == "#/components/schemas/q3"
    assert schema["paths"]["/"]["get"]["parameters"][2]["description"] == Gender.__doc__
    assert schema["components"]["schemas"]["q3"]["format"] == "bar"

    # Attempt to pass invalid key
    app = Litestar([error_handler])
    with pytest.raises(ValueError) as e:
        app.openapi_schema
    assert str(e.value).startswith("`schema_extra` declares key")


def test_uuid_path_description_generation() -> None:
    # https://github.com/litestar-org/litestar/issues/2967
    @get("str/{id:str}")
    async def str_path(id: Annotated[str, Parameter(description="String ID")]) -> str:
        return id

    @get("uuid/{id:uuid}")
    async def uuid_path(id: Annotated[UUID, Parameter(description="UUID ID")]) -> UUID:
        return id

    with create_test_client(
        [str_path, uuid_path], openapi_config=OpenAPIConfig(title="Test API", version="1.0.0")
    ) as client:
        response = client.get("/schema/openapi.json")
        assert response.json()["paths"]["/str/{id}"]["get"]["parameters"][0]["description"] == "String ID"
        assert response.json()["paths"]["/uuid/{id}"]["get"]["parameters"][0]["description"] == "UUID ID"


def test_unwrap_new_type() -> None:
    FancyString = NewType("FancyString", str)

    @get("/{path_param:str}")
    async def handler(
        param: FancyString,
        optional_param: Optional[FancyString],
        path_param: FancyString,
    ) -> FancyString:
        return FancyString("")

    app = Litestar([handler])
    assert app.openapi_schema.paths["/{path_param}"].get.parameters[0].schema.type == OpenAPIType.STRING  # type: ignore[index, union-attr]
    assert app.openapi_schema.paths["/{path_param}"].get.parameters[1].schema.one_of == [  # type: ignore[index, union-attr]
        Schema(type=OpenAPIType.STRING),
        Schema(type=OpenAPIType.NULL),
    ]
    assert app.openapi_schema.paths["/{path_param}"].get.parameters[2].schema.type == OpenAPIType.STRING  # type: ignore[index, union-attr]
    assert (
        app.openapi_schema.paths["/{path_param}"].get.responses["200"].content["application/json"].schema.type  # type: ignore[index, union-attr]
        == OpenAPIType.STRING
    )


def test_unwrap_nested_new_type() -> None:
    FancyString = NewType("FancyString", str)
    FancierString = NewType("FancierString", FancyString)  # pyright: ignore

    @get("/")
    async def handler(
        param: FancierString,
    ) -> None:
        return None

    app = Litestar([handler])
    assert app.openapi_schema.paths["/"].get.parameters[0].schema.type == OpenAPIType.STRING  # type: ignore[index, union-attr]


def test_unwrap_annotated_new_type() -> None:
    FancyString = NewType("FancyString", str)

    @dataclasses.dataclass
    class TestModel:
        param: Annotated[FancyString, "foo"]

    @get("/")
    async def handler(
        param: TestModel,
    ) -> None:
        return None

    app = Litestar([handler])

    testmodel_schema_name = app.openapi_schema.paths["/"].get.parameters[0].schema.value  # type: ignore[index, union-attr]
    assert app.openapi_schema.components.schemas[testmodel_schema_name].properties["param"].type == OpenAPIType.STRING  # type: ignore[index, union-attr]


def test_query_param_only_properties() -> None:
    # https://github.com/litestar-org/litestar/issues/3908
    @get("/{path_param:str}")
    def handler(
        path_param: str,
        query_param: str,
        header_param: Annotated[str, Parameter(header="header_param")],
        cookie_param: Annotated[str, Parameter(cookie="cookie_param")],
    ) -> None:
        pass

    app = Litestar([handler])
    params = {p.name: p for p in app.openapi_schema.paths["/{path_param}"].get.parameters}  # type: ignore[union-attr, index]

    for key in ["path_param", "header_param", "cookie_param"]:
        schema = params[key].to_schema()
        assert "allowEmptyValue" not in schema
        assert "allowReserved" not in schema

    assert params["query_param"].to_schema() == {
        "name": "query_param",
        "in": "query",
        "schema": {"type": "string"},
        "required": True,
        "deprecated": False,
        "allowEmptyValue": False,
        "allowReserved": False,
    }


def test_not_included_in_schema_parameter() -> None:
    @get("/handler")
    async def handler(param: Annotated[str, Parameter(include_in_schema=False)]) -> None:
        pass

    with create_test_client(handler) as client:
        response = client.get("/schema/openapi.json")

        response_json = response.json()
        handler_schema = response_json["paths"]["/handler"]["get"]
        assert "parameters" not in handler_schema


def test_two_parameters_but_one_not_included_in_schema() -> None:
    @get("/handler")
    def handler(param1: str, param2: str = Parameter(include_in_schema=False)) -> None:
        pass

    with create_test_client(handler) as client:
        response = client.get("/schema/openapi.json")

        response_json = response.json()
        handler_schema = response_json["paths"]["/handler"]["get"]
        assert "parameters" in handler_schema

        parameter_names = {param["name"] for param in handler_schema["parameters"]}
        assert "param1" in parameter_names
        assert "param2" not in parameter_names