# SPDX-License-Identifier: MIT
#
# Copyright (c) 2017 PySSB contributors (see AUTHORS for more details)
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# The above copyright notice and this permission notice shall be included in all
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"""Tests for the feed functionality"""

from base64 import b64decode
from collections import OrderedDict
from datetime import datetime, timezone

from nacl.signing import SigningKey, VerifyKey
import pytest
from pytest_mock import MockerFixture

from ssb.feed import Feed, LocalFeed, LocalMessage, Message, NoPrivateKeyException
from ssb.feed.models import get_millis_1970

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


def test_local_unsigned(local_feed: LocalFeed, mocker: MockerFixture) -> None:  # pylint: disable=redefined-outer-name
    """Test creating an unsigned message on a local feed"""

    mocked_dt = mocker.Mock(spec=datetime)
    mocked_dt.utcnow = mocker.MagicMock(return_value=datetime(2023, 3, 7, 11, 45, 54, 0, tzinfo=timezone.utc))
    mocker.patch("ssb.feed.models.datetime", mocked_dt)

    msg = LocalMessage(local_feed, b"test")

    assert msg.feed == local_feed
    assert msg.content == b"test"
    assert msg.sequence == 1
    assert msg.previous is None
    assert msg.timestamp == 1678189554000
    assert msg.signature == (
        "SxZsBINzsuQqmB6JLmXyr22+FRY33bp3wj1MwjAOU3MqifGqfc3W/2T5D4qel5mqrgJt9IT8c3QayB1suj82AQ==.sig.ed25519"
    )


@pytest.mark.parametrize(
    "timestamp,expected",
    (
        (datetime(2023, 3, 7, 11, 45, 54, 0, tzinfo=timezone.utc), 1678189554000),
        (datetime(2013, 5, 2, 2, 3, 4, 567890, tzinfo=timezone.utc), 1367460184567),
    ),
)
def test_millis(timestamp: datetime, expected: int, mocker: MockerFixture) -> None:
    """Test the get_millis_1970() function"""

    mocked_dt = mocker.Mock(spec=datetime)
    mocked_dt.utcnow = mocker.MagicMock(return_value=timestamp)
    mocker.patch("ssb.feed.models.datetime", mocked_dt)

    assert get_millis_1970() == expected