import itertools
from vcr.compat import mock

import pytest

from vcr import matchers
from vcr import request

# the dict contains requests with corresponding to its key difference
# with 'base' request.
REQUESTS = {
    'base': request.Request('GET', 'http://host.com/p?a=b', '', {}),
    'method': request.Request('POST', 'http://host.com/p?a=b', '', {}),
    'scheme': request.Request('GET', 'https://host.com:80/p?a=b', '', {}),
    'host': request.Request('GET', 'http://another-host.com/p?a=b', '', {}),
    'port': request.Request('GET', 'http://host.com:90/p?a=b', '', {}),
    'path': request.Request('GET', 'http://host.com/x?a=b', '', {}),
    'query': request.Request('GET', 'http://host.com/p?c=d', '', {}),
}


def assert_matcher(matcher_name):
    matcher = getattr(matchers, matcher_name)
    for k1, k2 in itertools.permutations(REQUESTS, 2):
        expecting_assertion_error = matcher_name in {k1, k2}
        if expecting_assertion_error:
            with pytest.raises(AssertionError):
                matcher(REQUESTS[k1], REQUESTS[k2])
        else:
            assert matcher(REQUESTS[k1], REQUESTS[k2]) is None


def test_uri_matcher():
    for k1, k2 in itertools.permutations(REQUESTS, 2):
        expecting_assertion_error = {k1, k2} != {"base", "method"}
        if expecting_assertion_error:
            with pytest.raises(AssertionError):
                matchers.uri(REQUESTS[k1], REQUESTS[k2])
        else:
            assert matchers.uri(REQUESTS[k1], REQUESTS[k2]) is None


req1_body = (b"<?xml version='1.0'?><methodCall><methodName>test</methodName>"
             b"<params><param><value><array><data><value><struct>"
             b"<member><name>a</name><value><string>1</string></value></member>"
             b"<member><name>b</name><value><string>2</string></value></member>"
             b"</struct></value></data></array></value></param></params></methodCall>")
req2_body = (b"<?xml version='1.0'?><methodCall><methodName>test</methodName>"
             b"<params><param><value><array><data><value><struct>"
             b"<member><name>b</name><value><string>2</string></value></member>"
             b"<member><name>a</name><value><string>1</string></value></member>"
             b"</struct></value></data></array></value></param></params></methodCall>")


@pytest.mark.parametrize("r1, r2", [
    (
        request.Request('POST', 'http://host.com/', '123', {}),
        request.Request('POST', 'http://another-host.com/',
                        '123', {'Some-Header': 'value'})
    ),
    (
        request.Request('POST', 'http://host.com/', 'a=1&b=2',
                        {'Content-Type': 'application/x-www-form-urlencoded'}),
        request.Request('POST', 'http://host.com/', 'b=2&a=1',
                        {'Content-Type': 'application/x-www-form-urlencoded'})
    ),
    (
        request.Request('POST', 'http://host.com/', '123', {}),
        request.Request('POST', 'http://another-host.com/', '123', {'Some-Header': 'value'})
    ),
    (
        request.Request(
            'POST', 'http://host.com/', 'a=1&b=2',
            {'Content-Type': 'application/x-www-form-urlencoded'}
        ),
        request.Request(
            'POST', 'http://host.com/', 'b=2&a=1',
            {'Content-Type': 'application/x-www-form-urlencoded'}
        )
    ),
    (
        request.Request(
            'POST', 'http://host.com/', '{"a": 1, "b": 2}',
            {'Content-Type': 'application/json'}
        ),
        request.Request(
            'POST', 'http://host.com/', '{"b": 2, "a": 1}',
            {'content-type': 'application/json'}
        )
    ),
    (
        request.Request(
            'POST', 'http://host.com/', req1_body,
            {'User-Agent': 'xmlrpclib', 'Content-Type': 'text/xml'}
        ),
        request.Request(
            'POST', 'http://host.com/', req2_body,
            {'user-agent': 'somexmlrpc', 'content-type': 'text/xml'}
        )
    ),
    (
        request.Request(
            'POST', 'http://host.com/',
            '{"a": 1, "b": 2}', {'Content-Type': 'application/json'}
        ),
        request.Request(
            'POST', 'http://host.com/',
            '{"b": 2, "a": 1}', {'content-type': 'application/json'}
        )
    )
])
def test_body_matcher_does_match(r1, r2):
    assert matchers.body(r1, r2) is None


@pytest.mark.parametrize("r1, r2", [
    (
        request.Request('POST', 'http://host.com/', '{"a": 1, "b": 2}', {}),
        request.Request('POST', 'http://host.com/', '{"b": 2, "a": 1}', {}),
    ),
    (
        request.Request(
            'POST', 'http://host.com/',
            '{"a": 1, "b": 3}', {'Content-Type': 'application/json'}
        ),
        request.Request(
            'POST', 'http://host.com/',
            '{"b": 2, "a": 1}', {'content-type': 'application/json'}
        )
    ),
    (
        request.Request(
            'POST', 'http://host.com/', req1_body, {'Content-Type': 'text/xml'}
        ),
        request.Request(
            'POST', 'http://host.com/', req2_body, {'content-type': 'text/xml'}
        )
    )
])
def test_body_match_does_not_match(r1, r2):
    with pytest.raises(AssertionError):
        matchers.body(r1, r2)


def test_query_matcher():
    req1 = request.Request("GET", "http://host.com/?a=b&c=d", "", {})
    req2 = request.Request("GET", "http://host.com/?c=d&a=b", "", {})
    assert matchers.query(req1, req2) is None

    req1 = request.Request("GET", "http://host.com/?a=b&a=b&c=d", "", {})
    req2 = request.Request("GET", "http://host.com/?a=b&c=d&a=b", "", {})
    req3 = request.Request("GET", "http://host.com/?c=d&a=b&a=b", "", {})
    assert matchers.query(req1, req2) is None
    assert matchers.query(req1, req3) is None


def test_matchers():
    assert_matcher("method")
    assert_matcher("scheme")
    assert_matcher("host")
    assert_matcher("port")
    assert_matcher("path")
    assert_matcher("query")


def test_evaluate_matcher_does_match():
    def bool_matcher(r1, r2):
        return True

    def assertion_matcher(r1, r2):
        assert 1 == 1

    r1, r2 = None, None
    for matcher in [bool_matcher, assertion_matcher]:
        match, assertion_msg = matchers._evaluate_matcher(matcher, r1, r2)
        assert match is True
        assert assertion_msg is None


def test_evaluate_matcher_does_not_match():
    def bool_matcher(r1, r2):
        return False

    def assertion_matcher(r1, r2):
        # This is like the "assert" statement preventing pytest to recompile it
        raise AssertionError()

    r1, r2 = None, None
    for matcher in [bool_matcher, assertion_matcher]:
        match, assertion_msg = matchers._evaluate_matcher(matcher, r1, r2)
        assert match is False
        assert not assertion_msg


def test_evaluate_matcher_does_not_match_with_assert_message():
    def assertion_matcher(r1, r2):
        # This is like the "assert" statement preventing pytest to recompile it
        raise AssertionError("Failing matcher")

    r1, r2 = None, None
    match, assertion_msg = matchers._evaluate_matcher(assertion_matcher, r1, r2)
    assert match is False
    assert assertion_msg == "Failing matcher"


def test_get_assertion_message():
    assert matchers.get_assertion_message(None) is None
    assert matchers.get_assertion_message("") == ""


def test_get_assertion_message_with_details():
    assertion_msg = "q1=1 != q2=1"
    expected = assertion_msg
    assert matchers.get_assertion_message(assertion_msg) == expected


@pytest.mark.parametrize(
    "r1, r2, expected_successes, expected_failures",
    [
        (
            request.Request("GET", "http://host.com/p?a=b", "", {}),
            request.Request("GET", "http://host.com/p?a=b", "", {}),
            ["method", "path"],
            [],
        ),
        (
            request.Request("GET", "http://host.com/p?a=b", "", {}),
            request.Request("POST", "http://host.com/p?a=b", "", {}),
            ["path"],
            ["method"],
        ),
        (
            request.Request("GET", "http://host.com/p?a=b", "", {}),
            request.Request("POST", "http://host.com/path?a=b", "", {}),
            [],
            ["method", "path"],
        ),
    ],
)
def test_get_matchers_results(r1, r2, expected_successes, expected_failures):
    successes, failures = matchers.get_matchers_results(
        r1, r2, [matchers.method, matchers.path]
    )
    assert successes == expected_successes
    assert len(failures) == len(expected_failures)
    for i, expected_failure in enumerate(expected_failures):
        assert failures[i][0] == expected_failure
        assert failures[i][1] is not None


@mock.patch("vcr.matchers.get_matchers_results")
@pytest.mark.parametrize(
    "successes, failures, expected_match",
    [
        (["method", "path"], [], True),
        (["method"], ["path"], False),
        ([], ["method", "path"], False),
    ],
)
def test_requests_match(mock_get_matchers_results, successes, failures, expected_match):
    mock_get_matchers_results.return_value = (successes, failures)
    r1 = request.Request("GET", "http://host.com/p?a=b", "", {})
    r2 = request.Request("GET", "http://host.com/p?a=b", "", {})
    match = matchers.requests_match(r1, r2, [matchers.method, matchers.path])
    assert match is expected_match