import pytest

from swagger_spec_validator.common import SwaggerValidationError
from swagger_spec_validator.validator20 import validate_parameters


@pytest.mark.parametrize(
    "top_level_parameters",
    [
        {},
        {
            "Offset": {
                "in": "query",
                "name": "offset",
                "type": "integer",
            },
        },
        {
            "AcceptedLanguage": {
                "in": "header",
                "name": "Accepted-Language",
                "type": "string",
            },
        },
    ],
)
def test_valid_top_level_parameters(top_level_parameters):
    validate_parameters(top_level_parameters, deref=lambda x: x)


@pytest.mark.parametrize(
    "top_level_parameters, expected_exception_string",
    [
        [
            {
                "Offset": {
                    "in": "body",
                    "name": "body",
                },
            },
            "Body parameter in `#/parameters/Offset` does not specify `schema`.",
        ],
        [
            {
                "ParameterWithoutType": {
                    "in": "header",
                    "name": "a-random-parameter",
                },
            },
            "Non-Body parameter in `#/parameters/ParameterWithoutType` does not specify `type`.",
        ],
        [
            {
                "ListOfIntegers": {
                    "in": "header",
                    "name": "Accepted-Language",
                    "type": "array",
                },
            },
            "Non-Body array parameter in `#/parameters/ListOfIntegers` does not specify `items`.",
        ],
    ],
)
def test_invalid_top_level_parameters(top_level_parameters, expected_exception_string):
    with pytest.raises(SwaggerValidationError) as excinfo:
        validate_parameters(top_level_parameters, deref=lambda x: x)

    assert str(excinfo.value) == expected_exception_string