"""Unit tests for KV ledger integration with composite motif IDs (Phase 17 Plan 02)."""
import torch
import sys
import os

sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", ".."))

from arbitor.attention.kv_ledger import KVLedger
from arbitor.config import SHARED_VQ_SIZE


def test_composite_ids_no_collision():
    ledger = KVLedger(max_size=256)
    for i in range(10):
        ledger.append(i)
    for cid in [100, 101, 102]:
        ledger.append(cid)
    assert len(ledger) == 13, f"expected 13, got {len(ledger)}"
    all_vals = ledger.get_sliding_window(13).tolist()
    assert all_vals == [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 100, 101, 102], f"got {all_vals}"
    print(" PASS test_composite_ids_no_collision")


def test_composite_offset_non_overlapping():
    composite_offset = SHARED_VQ_SIZE
    assert composite_offset > 0
    print(f" PASS test_composite_offset_non_overlapping (offset={composite_offset})")


def test_composite_ids_track_in_ledger():
    ledger = KVLedger(max_size=256)
    composite_ids = torch.tensor([[0, -1, 2], [3, 4, -1]])
    offset = 4096

    for b in range(composite_ids.shape[0]):
        for k in range(composite_ids.shape[1]):
            cid = int(composite_ids[b, k])
            if cid >= 0:
                ledger.append(offset + cid)

    assert len(ledger) == 4, f"expected 4 valid composite IDs, got {len(ledger)}"
    vals = ledger.get_sliding_window(4)
    expected = [4096, 4098, 4099, 4100]
    assert vals.tolist() == expected, f"got {vals.tolist()}"
    print(" PASS test_composite_ids_track_in_ledger")


if __name__ == "__main__":
    test_composite_ids_no_collision()
    test_composite_offset_non_overlapping()
    test_composite_ids_track_in_ledger()
    print("\nAll KV integration tests PASS")