from unittest.mock import patch
import pytest
from moto.s3.utils import (
    bucket_name_from_url,
    _VersionedKeyStore,
    parse_region_from_url,
    compute_checksum,
    cors_matches_origin,
)


def test_base_url():
    assert bucket_name_from_url("https://s3.amazonaws.com/") is None


def test_localhost_bucket():
    assert bucket_name_from_url("https://wfoobar.localhost:5000/abc") == "wfoobar"


def test_localhost_without_bucket():
    assert bucket_name_from_url("https://www.localhost:5000/def") is None


def test_force_ignore_subdomain_for_bucketnames():
    with patch("moto.s3.utils.S3_IGNORE_SUBDOMAIN_BUCKETNAME", True):
        assert (
            bucket_name_from_url("https://subdomain.localhost:5000/abc/resource")
            is None
        )


def test_versioned_key_store():
    key_store = _VersionedKeyStore()

    assert not key_store

    key_store["key"] = [1]
    assert len(key_store) == 1

    key_store["key"] = 2
    assert len(key_store) == 1

    assert key_store["key"] == 2
    assert key_store.get("key") == 2
    assert key_store.get("badkey") is None
    assert key_store.get("badkey", "HELLO") == "HELLO"

    # Tests key[
    assert "badkey" not in key_store
    with pytest.raises(KeyError):
        _ = key_store["badkey"]

    assert len(key_store.getlist("key")) == 2
    assert key_store.getlist("key") == [[1], 2]
    assert key_store.getlist("badkey") is None

    key_store.setlist("key", 1)
    assert key_store.getlist("key") == [1]

    key_store.setlist("key", (1, 2))
    assert key_store.getlist("key") != (1, 2)
    assert key_store.getlist("key") == [1, 2]

    key_store.setlist("key", [[1], [2]])
    assert len(key_store["key"]) == 1
    assert key_store.getlist("key") == [[1], [2]]


def test_parse_region_from_url():
    expected = "us-west-2"
    for url in [
        "http://s3-us-west-2.amazonaws.com/bucket",
        "http://s3.us-west-2.amazonaws.com/bucket",
        "http://bucket.s3-us-west-2.amazonaws.com",
        "https://s3-us-west-2.amazonaws.com/bucket",
        "https://s3.us-west-2.amazonaws.com/bucket",
        "https://bucket.s3-us-west-2.amazonaws.com",
    ]:
        assert parse_region_from_url(url) == expected

    expected = "us-east-1"
    for url in [
        "http://s3.amazonaws.com/bucket",
        "http://bucket.s3.amazonaws.com",
        "https://s3.amazonaws.com/bucket",
        "https://bucket.s3.amazonaws.com",
    ]:
        assert parse_region_from_url(url) == expected


def test_checksum_sha256():
    checksum = b"h9FJy0JMA4dlbyEdJYn7Wx4WIpkhMJ6YWIQZzMqKc2I="
    assert compute_checksum(b"somedata", "SHA256") == checksum
    # Unknown algorithms fallback to SHA256 for now
    assert compute_checksum(b"somedata", algorithm="unknown") == checksum


def test_checksum_sha1():
    assert compute_checksum(b"somedata", "SHA1") == b"76oxGuRIpzdMEiBhv+2VLZQOnjc="


def test_checksum_crc32():
    assert compute_checksum(b"somedata", "CRC32") == b"Uwy90A=="


def test_checksum_crc32c():
    try:
        import crc32c  # noqa # pylint: disable=unused-import

        assert compute_checksum(b"somedata", "CRC32C") == b"dB9qBQ=="
    except:  # noqa: E722 Do not use bare except
        # Optional library Can't be found - just revert to CRC32
        assert compute_checksum(b"somedata", "CRC32C") == b"Uwy90A=="


def test_cors_utils():
    "Fancy string matching"
    assert cors_matches_origin("a", ["a"])
    assert cors_matches_origin("b", ["a", "b"])
    assert not cors_matches_origin("c", [])
    assert not cors_matches_origin("c", ["a", "b"])

    assert cors_matches_origin("http://www.google.com", ["http://*.google.com"])
    assert cors_matches_origin("http://www.google.com", ["http://www.*.com"])
    assert cors_matches_origin("http://www.google.com", ["http://*"])
    assert cors_matches_origin("http://www.google.com", ["*"])

    assert not cors_matches_origin("http://www.google.com", ["http://www.*.org"])
    assert not cors_matches_origin("http://www.google.com", ["https://*"])