from falcon import testing
import json
import pytest

from dspace_statistics_api.app import api


@pytest.fixture
def client():
    return testing.TestClient(api)


def test_get_docs(client):
    '''Test requesting the documentation at the root.'''

    response = client.simulate_get('/')

    assert isinstance(response.content, bytes)
    assert response.status_code == 200


def test_get_item(client):
    '''Test requesting a single item.'''

    response = client.simulate_get('/item/17')

    # response.content is a bytes in Python 3.5
    if isinstance(response.content, bytes):
        response_doc = json.loads(response.content.decode('utf-8'))
    else:
        response_doc = json.loads(response.content)

    assert isinstance(response_doc['downloads'], int)
    assert isinstance(response_doc['id'], int)
    assert isinstance(response_doc['views'], int)
    assert response.status_code == 200


def test_get_missing_item(client):
    '''Test requesting a single non-existing item.'''

    response = client.simulate_get('/item/1')

    assert response.status_code == 404


def test_get_items(client):
    '''Test requesting 100 items.'''

    response = client.simulate_get('/items', query_string='limit=100')
    response_doc = json.loads(response.content)

    assert isinstance(response_doc['currentPage'], int)
    assert isinstance(response_doc['totalPages'], int)
    assert isinstance(response_doc['statistics'], list)
    assert response.status_code == 200


def test_get_items_invalid_limit(client):
    '''Test requesting 100 items with an invalid limit parameter.'''

    response = client.simulate_get('/items', query_string='limit=101')

    assert response.status_code == 400


def test_get_items_invalid_page(client):
    '''Test requesting 100 items with an invalid page parameter.'''

    response = client.simulate_get('/items', query_string='page=-1')

    assert response.status_code == 400