from __future__ import annotations

from npc_authority import NpcAuthorityManager, ScopeKey, scope_from_transform


def test_first_player_in_scope_becomes_authority() -> None:
    manager = NpcAuthorityManager()
    scope = ScopeKey("00000010", "0000003C")
    changes = manager.reconcile([(7, scope), (4, scope)])
    assert len(changes) == 1
    assignment = manager.get(scope)
    assert assignment is not None
    assert assignment.player_id == 4
    assert assignment.epoch == 1
    assert manager.authorize(4, scope, 1)
    assert not manager.authorize(7, scope, 1)


def test_disconnect_reassigns_and_increments_epoch() -> None:
    manager = NpcAuthorityManager()
    scope = ScopeKey("00000010", "0000003C")
    manager.reconcile([(1, scope), (2, scope)])
    changes = manager.reconcile([(2, scope)])
    assert len(changes) == 1
    assert changes[0].previous_player_id == 1
    assert changes[0].player_id == 2
    assert changes[0].epoch == 2
    assert not manager.authorize(1, scope, 1)
    assert manager.authorize(2, scope, 2)


def test_two_scopes_have_independent_authorities() -> None:
    manager = NpcAuthorityManager()
    a = ScopeKey("00000010", "0000003C")
    b = ScopeKey("00000020", "0000003C")
    manager.reconcile([(5, a), (2, a), (7, b), (9, b)])
    assert manager.get(a).player_id == 2
    assert manager.get(b).player_id == 7
    assert manager.get(a).epoch == 1
    assert manager.get(b).epoch == 1


def test_empty_scope_revokes_and_future_reentry_uses_new_epoch() -> None:
    manager = NpcAuthorityManager()
    scope = ScopeKey("00000010", "")
    manager.reconcile([(1, scope)])
    revoked = manager.reconcile([])
    assert revoked[0].player_id == 0
    assert revoked[0].epoch == 2
    assert manager.get(scope) is None
    granted = manager.reconcile([(3, scope)])
    assert granted[0].player_id == 3
    assert granted[0].epoch == 3


def test_scope_from_transform_normalizes_form_ids() -> None:
    scope = scope_from_transform({"cellId": "1a", "worldspaceId": "3c"})
    assert scope == ScopeKey("0000001A", "0000003C")
    assert scope_from_transform(None) is None
    assert scope_from_transform({"cellId": ""}) is None