"""Tests for the feed functionality"""

from base64 import b64decode
from collections import OrderedDict

from nacl.signing import SigningKey, VerifyKey
import pytest

from ssb.feed import Feed, LocalFeed, LocalMessage, Message, NoPrivateKeyException

SERIALIZED_M1 = b"""{
  "previous": null,
  "author": "@I/4cyN/jPBbDsikbHzAEvmaYlaJK33lW3UhWjNXjyrU=.ed25519",
  "sequence": 1,
  "timestamp": 1495706260190,
  "hash": "sha256",
  "content": {
    "type": "about",
    "about": "@I/4cyN/jPBbDsikbHzAEvmaYlaJK33lW3UhWjNXjyrU=.ed25519",
    "name": "neo",
    "description": "The Chosen One"
  },
  "signature": "lPsQ9P10OgeyH6u0unFgiI2wV/RQ7Q2x2ebxnXYCzsJ055TBMXphRADTKhOMS2EkUxXQ9k3amj5fnWPudGxwBQ==.sig.ed25519"
}"""


@pytest.fixture
def local_feed():
    """Fixture providing a local feed"""

    secret = b64decode("Mz2qkNOP2K6upnqibWrR+z8pVUI1ReA1MLc7QMtF2qQ=")
    return LocalFeed(SigningKey(secret))


@pytest.fixture
def remote_feed():
    """Fixture providing a remote feed"""

    public = b64decode("I/4cyN/jPBbDsikbHzAEvmaYlaJK33lW3UhWjNXjyrU=")
    return Feed(VerifyKey(public))


def test_local_feed():
    """Test a local feed"""

    secret = b64decode("Mz2qkNOP2K6upnqibWrR+z8pVUI1ReA1MLc7QMtF2qQ=")
    feed = LocalFeed(SigningKey(secret))
    assert bytes(feed.private_key) == secret
    assert bytes(feed.public_key) == b64decode("I/4cyN/jPBbDsikbHzAEvmaYlaJK33lW3UhWjNXjyrU=")
    assert feed.id == "@I/4cyN/jPBbDsikbHzAEvmaYlaJK33lW3UhWjNXjyrU=.ed25519"


def test_remote_feed():
    """Test a remote feed"""

    public = b64decode("I/4cyN/jPBbDsikbHzAEvmaYlaJK33lW3UhWjNXjyrU=")
    feed = Feed(VerifyKey(public))
    assert bytes(feed.public_key) == public
    assert feed.id == "@I/4cyN/jPBbDsikbHzAEvmaYlaJK33lW3UhWjNXjyrU=.ed25519"

    m1 = Message(
        feed,
        OrderedDict([("type", "about"), ("about", feed.id), ("name", "neo"), ("description", "The Chosen One")]),
        "foo",
        timestamp=1495706260190,
    )

    with pytest.raises(NoPrivateKeyException):
        feed.sign(m1)


def test_local_message(local_feed):  # pylint: disable=redefined-outer-name
    """Test a local message"""

    m1 = LocalMessage(
        local_feed,
        OrderedDict([("type", "about"), ("about", local_feed.id), ("name", "neo"), ("description", "The Chosen One")]),
        timestamp=1495706260190,
    )
    assert m1.timestamp == 1495706260190
    assert m1.previous is None
    assert m1.sequence == 1
    assert m1.signature == (
        "lPsQ9P10OgeyH6u0unFgiI2wV/RQ7Q2x2ebxnXYCzsJ055TBMXphRADTKhOMS2EkUxXQ9k3amj5fnWPudGxwBQ==.sig.ed25519"
    )
    assert m1.key == "%xRDqws/TrQmOd4aEwZ32jdLhP873ZKjIgHlggPR0eoo=.sha256"

    m2 = LocalMessage(
        local_feed,
        OrderedDict(
            [("type", "about"), ("about", local_feed.id), ("name", "morpheus"), ("description", "Dude with big jaw")]
        ),
        previous=m1,
        timestamp=1495706447426,
    )
    assert m2.timestamp == 1495706447426
    assert m2.previous is m1
    assert m2.sequence == 2
    assert m2.signature == (
        "3SY85LX6/ppOfP4SbfwZbKfd6DccbLRiB13pwpzbSK0nU52OEJxOqcJ2Uensr6RkrWztWLIq90sNOn1zRAoOAw==.sig.ed25519"
    )
    assert m2.key == "%nx13uks5GUwuKJC49PfYGMS/1pgGTtwwdWT7kbVaroM=.sha256"


def test_remote_message(remote_feed):  # pylint: disable=redefined-outer-name
    """Test a remote message"""

    signature = "lPsQ9P10OgeyH6u0unFgiI2wV/RQ7Q2x2ebxnXYCzsJ055TBMXphRADTKhOMS2EkUxXQ9k3amj5fnWPudGxwBQ==.sig.ed25519"
    m1 = Message(
        remote_feed,
        OrderedDict([("type", "about"), ("about", remote_feed.id), ("name", "neo"), ("description", "The Chosen One")]),
        signature,
        timestamp=1495706260190,
    )
    assert m1.timestamp == 1495706260190
    assert m1.previous is None
    assert m1.sequence == 1
    assert m1.signature == signature
    assert m1.key == "%xRDqws/TrQmOd4aEwZ32jdLhP873ZKjIgHlggPR0eoo=.sha256"

    signature = "3SY85LX6/ppOfP4SbfwZbKfd6DccbLRiB13pwpzbSK0nU52OEJxOqcJ2Uensr6RkrWztWLIq90sNOn1zRAoOAw==.sig.ed25519"
    m2 = Message(
        remote_feed,
        OrderedDict(
            [("type", "about"), ("about", remote_feed.id), ("name", "morpheus"), ("description", "Dude with big jaw")]
        ),
        signature,
        previous=m1,
        timestamp=1495706447426,
    )
    assert m2.timestamp == 1495706447426
    assert m2.previous is m1
    assert m2.sequence == 2
    assert m2.signature == signature
    m2.verify(signature)
    assert m2.key == "%nx13uks5GUwuKJC49PfYGMS/1pgGTtwwdWT7kbVaroM=.sha256"


def test_remote_no_signature(remote_feed):  # pylint: disable=redefined-outer-name
    """Test remote feed without a signature"""

    with pytest.raises(ValueError):
        Message(
            remote_feed,
            OrderedDict(
                [("type", "about"), ("about", remote_feed.id), ("name", "neo"), ("description", "The Chosen One")]
            ),
            None,
            timestamp=1495706260190,
        )


def test_serialize(local_feed):  # pylint: disable=redefined-outer-name
    """Test feed serialization"""

    m1 = LocalMessage(
        local_feed,
        OrderedDict([("type", "about"), ("about", local_feed.id), ("name", "neo"), ("description", "The Chosen One")]),
        timestamp=1495706260190,
    )

    assert m1.serialize() == SERIALIZED_M1


def test_parse(local_feed):  # pylint: disable=redefined-outer-name
    """Test feed parsing"""

    m1 = LocalMessage.parse(SERIALIZED_M1, local_feed)
    assert m1.content == {"type": "about", "about": local_feed.id, "name": "neo", "description": "The Chosen One"}
    assert m1.timestamp == 1495706260190