import pytest
from flask import Flask


@pytest.fixture
def app():
    app = Flask(__name__)
    return app


@pytest.mark.unit
class TestGetUserId:
    pass

    def test_returns_user_id_from_decoded_token(self, app):
        from application.api.user.utils import get_user_id

        with app.test_request_context():
            from flask import request

            request.decoded_token = {"sub": "user_123"}
            assert get_user_id() == "user_123"

    def test_returns_none_when_no_decoded_token(self, app):
        from application.api.user.utils import get_user_id

        with app.test_request_context():
            assert get_user_id() is None

    def test_returns_none_when_decoded_token_has_no_sub(self, app):
        from application.api.user.utils import get_user_id

        with app.test_request_context():
            from flask import request

            request.decoded_token = {}
            assert get_user_id() is None


@pytest.mark.unit
class TestRequireAuth:
    pass

    def test_allows_authenticated_request(self, app):
        from application.api.user.utils import require_auth

        @require_auth
        def protected():
            return "ok"

        with app.test_request_context():
            from flask import request

            request.decoded_token = {"sub": "user_123"}
            assert protected() == "ok"

    def test_returns_401_when_unauthenticated(self, app):
        from application.api.user.utils import require_auth

        @require_auth
        def protected():
            return "ok"

        with app.test_request_context():
            result = protected()
            assert result.status_code == 401


@pytest.mark.unit
class TestSuccessResponse:
    pass

    def test_default_success_response(self, app):
        from application.api.user.utils import success_response

        with app.app_context():
            resp = success_response()
            assert resp.status_code == 200
            assert resp.json["success"] is True




@pytest.mark.unit
class TestErrorResponse:
    pass

    def test_error_response_custom_status(self, app):
        from application.api.user.utils import error_response

        with app.app_context():
            resp = error_response("Not found", 404)
            assert resp.status_code == 404

    def test_error_response_extra_kwargs(self, app):
        from application.api.user.utils import error_response

        with app.app_context():
            resp = error_response("Bad", 400, errors=["field1", "field2"])
            assert resp.json["errors"] == ["field1", "field2"]


@pytest.mark.unit
class TestValidateObjectId:
    pass

@pytest.mark.unit
class TestValidatePagination:
    pass

@pytest.mark.unit
class TestCheckResourceOwnership:
    pass

@pytest.mark.unit
class TestSerializeObjectId:
    pass

@pytest.mark.unit
class TestSerializeList:
    pass

@pytest.mark.unit
class TestRequireFields:
    pass

    def test_allows_valid_request(self, app):
        from application.api.user.utils import require_fields

        @require_fields(["name", "email"])
        def handler():
            return "ok"

        with app.test_request_context(
            "/", method="POST", json={"name": "Alice", "email": "a@b.com"}
        ):
            assert handler() == "ok"


    def test_rejects_empty_body(self, app):
        from application.api.user.utils import require_fields

        @require_fields(["name"])
        def handler():
            return "ok"

        with app.test_request_context(
            "/", method="POST", json={}
        ):
            result = handler()
            assert result.status_code == 400


@pytest.mark.unit
class TestSafeDbOperation:
    pass

@pytest.mark.unit
class TestValidateEnum:
    pass

@pytest.mark.unit
class TestExtractSortParams:
    pass