"""Tests for remote (satellite) domains: config, replica application, feed."""

import asyncio
import os
import secrets
from datetime import UTC, datetime
from uuid import UUID

import pytest

import paskia.db.operations as ops_db
from paskia import domains, satellite, syncfeed
from paskia.db.structs import (
    Config,
    Credential,
    DomainConfig,
    OriginEntry,
    RemoteConfig,
    Session,
    User,
)
from paskia.db.structs import DB
from paskia.util.crypto import hash_secret

from .conftest import TEST_RP_ID

REMOTE_URL = "http://remote.test"


def _remote_domain_config(**kw) -> Config:
    return Config(
        domains={
            TEST_RP_ID: DomainConfig(origins={f"**.{TEST_RP_ID}": True}),
            "example.com": DomainConfig(
                origins={
                    "**.example.com": True,
                    "auth.example.com": OriginEntry(auth_host=True),
                },
                remote=RemoteConfig(url=REMOTE_URL, token="t", **kw),
            ),
        }
    )


def test_remote_domain_valid():
    domains.validate_config(_remote_domain_config())


def test_remote_domain_requires_auth_host():
    config = _remote_domain_config()
    config.domains["example.com"].origins = {"**.example.com": True}
    with pytest.raises(ValueError, match="auth host"):
        domains.validate_config(config)


def test_remote_domain_requires_http_url():
    config = _remote_domain_config()
    config.domains["example.com"].remote.url = "ftp://x"
    with pytest.raises(ValueError, match="http"):
        domains.validate_config(config)


def test_sanitize_preserves_remote():
    config, warnings = domains.sanitize_config(_remote_domain_config())
    assert not warnings
    assert config.domains["example.com"].remote.url == REMOTE_URL


def test_apply_upsert_and_delete():
    replica = DB()
    user = User.create(display_name="U", role=UUID(int=1))
    user.uuid = UUID(int=2)
    satellite._apply(
        replica, "users", str(user.uuid), "upsert", _builtins(user)
    )
    assert replica.users[user.uuid].display_name == "U"
    satellite._apply(replica, "users", str(user.uuid), "delete", None)
    assert not replica.users


def _builtins(obj):
    import msgspec

    return msgspec.to_builtins(obj)


def test_apply_session_roundtrip():
    """Sessions keep their string key and datetime/UUID fields."""
    replica = DB()
    session = Session.create(
        user=UUID(int=1),
        credential=UUID(int=2),
        key=hash_secret("cookie", "sekret"),
        host="app2.example.com",
        ip="127.0.0.1",
        user_agent="ua",
        validated=datetime.now(UTC),
        rp_id="example.com",
    )
    satellite._apply(replica, "sessions", session.key, "upsert", _builtins(session))
    stored = replica.sessions[session.key]
    assert stored.host == "app2.example.com"
    assert stored.validated == session.validated
    assert stored.user_uuid == UUID(int=1)


def test_apply_credential_bytes_roundtrip():
    """credential_id/public_key are bytes over the wire (base64 in JSON)."""
    replica = DB()
    cred = Credential.create(
        credential_id=os.urandom(32),
        user=UUID(int=1),
        aaguid=UUID(int=0),
        public_key=os.urandom(64),
        sign_count=3,
        rp_id="example.com",
    )
    cred.uuid = UUID(int=9)
    # Simulate the full wire path: builtins -> JSON -> builtins
    import msgspec

    wire = msgspec.json.decode(msgspec.json.encode(_builtins(cred)))
    satellite._apply(replica, "credentials", str(cred.uuid), "upsert", wire)
    stored = replica.credentials[cred.uuid]
    assert stored.credential_id == cred.credential_id
    assert stored.public_key == cred.public_key
    assert stored.sign_count == 3


def test_feed_emit_and_replay():
    feed = syncfeed.SyncFeed()
    user = User.create(display_name="A", role=UUID(int=1))
    feed.emit("users", "k1", user)
    feed.emit("users", "k1", None)
    assert feed.seq == 2
    assert feed.replay_since(0)[0]["op"] == "upsert"
    assert feed.replay_since(1)[0]["op"] == "delete"
    assert feed.replay_since(2) == []
    assert feed.replay_since(99) is None


def test_feed_ring_overflow_replay_none():
    feed = syncfeed.SyncFeed()
    feed.events = __import__("collections").deque(maxlen=3)
    for i in range(5):
        feed.emit("users", f"k{i}", None)
    assert feed.replay_since(0) is None  # fell off the ring
    assert [e["seq"] for e in feed.replay_since(4)] == [5]
    assert feed.replay_since(5) == []


@pytest.mark.asyncio
async def test_operations_emit_events(test_db):
    """Writes through db.operations land on the sync feed."""
    syncfeed.feed.events.clear()
    syncfeed.feed.seq = 0
    user = next(iter(test_db.users.values()))
    ops_db.update_user_display_name(user.uuid, "Renamed")
    tables = {e["table"] for e in syncfeed.feed.events}
    assert "users" in tables
    key = syncfeed.feed.events[-1]["key"]
    assert syncfeed.feed.events[-1]["fields"]["display_name"] == "Renamed"
    assert key == str(user.uuid)


@pytest.mark.asyncio
async def test_replica_refresh_and_evict():
    replica = satellite.RemoteReplica(RemoteConfig(url=REMOTE_URL, token="t"))
    token = secrets.token_urlsafe(12)
    session = Session.create(
        user=UUID(int=1),
        credential=UUID(int=2),
        key=hash_secret("cookie", token),
        host="app2.example.com",
        ip="1.1.1.1",
        user_agent="ua",
        validated=datetime(2020, 1, 1, tzinfo=UTC),
    )
    replica.db.sessions[session.key] = session

    now = datetime.now(UTC)
    replica.refresh_session(session.key, now, "2.2.2.2", "new-ua")
    assert replica.db.sessions[session.key].validated == now
    queued = replica._pending_refresh[session.key]
    assert queued["type"] == "session_refresh"
    assert queued["ip"] == "2.2.2.2"

    replica.evict_session(token)
    assert not replica.db.sessions


def test_availability_gate():
    replica = satellite.RemoteReplica(
        RemoteConfig(url=REMOTE_URL, token="t", cache_ttl=60)
    )
    assert not replica.available()  # never synced
    replica.last_contact = __import__("time").monotonic()
    assert replica.available()