import json

import flask
import pytest
from unittest.mock import MagicMock

from connexion.apis.flask_api import FlaskApi
from connexion.exceptions import BadRequestProblem
from connexion.decorators.validation import ParameterValidator


def test_parameter_validator(monkeypatch):
    request = MagicMock(name='request')
    request.args = {}
    request.headers = {}
    request.cookies = {}
    request.params = {}
    app = MagicMock(name='app')

    app.response_class = flask.Response
    monkeypatch.setattr('flask.request', request)
    monkeypatch.setattr('flask.current_app', app)

    def orig_handler(*args, **kwargs):
        return 'OK'

    params = [{'name': 'p1', 'in': 'path', 'type': 'integer', 'required': True},
              {'name': 'h1', 'in': 'header', 'type': 'string', 'enum': ['a', 'b']},
              {'name': 'c1', 'in': 'cookie', 'type': 'string', 'enum': ['a', 'b']},
              {'name': 'q1', 'in': 'query', 'type': 'integer', 'maximum': 3},
              {'name': 'a1', 'in': 'query', 'type': 'array', 'minItems': 2, 'maxItems': 3,
               'items': {'type': 'integer', 'minimum': 0}}]
    validator = ParameterValidator(params, FlaskApi)
    handler = validator(orig_handler)

    kwargs = {'query': {}, 'headers': {}, 'cookies': {}}
    request = MagicMock(path_params={}, **kwargs)
    with pytest.raises(BadRequestProblem) as exc:
        handler(request)
    assert exc.value.detail == "Missing path parameter 'p1'"
    request = MagicMock(path_params={'p1': '123'}, **kwargs)
    assert handler(request) == 'OK'
    request = MagicMock(path_params={'p1': ''}, **kwargs)
    with pytest.raises(BadRequestProblem) as exc:
        handler(request)
    assert exc.value.detail == "Wrong type, expected 'integer' for path parameter 'p1'"
    request = MagicMock(path_params={'p1': 'foo'}, **kwargs)
    with pytest.raises(BadRequestProblem) as exc:
        handler(request)
    assert exc.value.detail == "Wrong type, expected 'integer' for path parameter 'p1'"
    request = MagicMock(path_params={'p1': '1.2'}, **kwargs)
    with pytest.raises(BadRequestProblem) as exc:
        handler(request)
    assert exc.value.detail == "Wrong type, expected 'integer' for path parameter 'p1'"

    request = MagicMock(path_params={'p1': 1}, query={'q1': '4'}, headers={})
    with pytest.raises(BadRequestProblem) as exc:
        handler(request)
    assert exc.value.detail.startswith('4 is greater than the maximum of 3')
    request = MagicMock(path_params={'p1': 1}, query={'q1': '3'}, headers={}, cookies={})
    assert handler(request) == 'OK'

    request = MagicMock(path_params={'p1': 1}, query={'a1': ['1', '2']}, headers={}, cookies={})
    assert handler(request) == "OK"
    request = MagicMock(path_params={'p1': 1}, query={'a1': ['1', 'a']}, headers={})
    with pytest.raises(BadRequestProblem) as exc:
        handler(request)
    assert exc.value.detail.startswith("'a' is not of type 'integer'")
    request = MagicMock(path_params={'p1': '123'}, query={}, headers={}, cookies={'c1': 'b'})
    assert handler(request) == 'OK'

    request = MagicMock(path_params={'p1': '123'}, query={}, headers={}, cookies={'c1': 'x'})
    with pytest.raises(BadRequestProblem) as exc:
        assert handler(request)
    assert exc.value.detail.startswith("'x' is not one of ['a', 'b']")
    request = MagicMock(path_params={'p1': 1}, query={'a1': ['1', '-1']}, headers={})
    with pytest.raises(BadRequestProblem) as exc:
        handler(request)
    assert exc.value.detail.startswith("-1 is less than the minimum of 0")
    request = MagicMock(path_params={'p1': 1}, query={'a1': ['1']}, headers={})
    with pytest.raises(BadRequestProblem) as exc:
        handler(request)
    assert exc.value.detail.startswith("[1] is too short")
    request = MagicMock(path_params={'p1': 1}, query={'a1': ['1', '2', '3', '4']}, headers={})
    with pytest.raises(BadRequestProblem) as exc:
        handler(request)
    assert exc.value.detail.startswith("[1, 2, 3, 4] is too long")

    request = MagicMock(path_params={'p1': '123'}, query={}, headers={'h1': 'a'}, cookies={})
    assert handler(request) == 'OK'

    request = MagicMock(path_params={'p1': '123'}, query={}, headers={'h1': 'x'})
    with pytest.raises(BadRequestProblem) as exc:
        handler(request)
    assert exc.value.detail.startswith("'x' is not one of ['a', 'b']")