import datetime
import uuid

from agentmsgs.core.types import Agent, Message, Thread, ThreadInfo, ThreadReadState


def test_agent_identity_on_id_not_name():
    a1 = Agent(id=uuid.uuid4(), name="Alice")
    a2 = Agent(id=uuid.uuid4(), name="Alice")
    assert a1 != a2  # different id => not equal even though name same
    assert hash(a1) != hash(a2)


def test_agent_hash_on_id():
    uid = uuid.uuid4()
    a1 = Agent(id=uid, name="Alice")
    a2 = Agent(
        id=uid, name="Bob"
    )  # same id, different name => equal per design (id is identity)
    assert a1 == a2
    assert hash(a1) == hash(a2)


def test_thread_multiple_with_same_participants_allowed():
    a = Agent(id=uuid.uuid4(), name="A")
    b = Agent(id=uuid.uuid4(), name="B")
    t1 = Thread(
        id=uuid.uuid4(),
        participants=frozenset({a, b}),
        created_at=datetime.datetime.now(datetime.UTC),
    )
    t2 = Thread(
        id=uuid.uuid4(),
        participants=frozenset({a, b}),
        created_at=datetime.datetime.now(datetime.UTC),
    )
    assert t1 != t2
    assert t1.participants == t2.participants


def test_thread_info_and_read_state_hold_derived_data():
    now = datetime.datetime.now(datetime.UTC)
    alice = Agent(id=uuid.uuid4(), name="Alice")
    bob = Agent(id=uuid.uuid4(), name="Bob")
    thread = Thread(
        id=uuid.uuid4(), participants=frozenset({alice, bob}), created_at=now
    )
    latest = Message(
        id=uuid.uuid4(), sender=bob, content="hello", seq=1, ts=now
    )
    info = ThreadInfo(thread=thread, message_count=1, latest_message=latest)
    state = ThreadReadState(
        agent=alice,
        cursor_seq=0,
        latest_seq=1,
        unread_count=1,
        unread_from_others_count=1,
    )

    assert info.thread == thread
    assert info.latest_message == latest
    assert state.agent == alice
    assert state.unread_from_others_count == 1