"""Tests for harness/B/sweep.py -- multi-config sweep planning."""

import pytest

from harness.A import models as vlm_models
from harness.B import sweep


def test_build_plan_covers_every_combination():
    plan = sweep.build_plan(
        ["qwen3.5-2b", "qwen3.5-4b"],
        ["explicit"],
        ["uniform", "selective"],
        [16, 32],
        ["metric"],
        ["tracking"],
    )
    assert len(plan) == 2 * 1 * 2 * 2
    assert ("qwen3.5-2b", "explicit", "metric", "tracking", "uniform", 16) in plan
    assert ("qwen3.5-4b", "explicit", "metric", "tracking", "selective", 32) in plan


def test_build_plan_sweeps_depth_and_tracking_too():
    plan = sweep.build_plan(
        ["qwen3.5-2b"],
        ["explicit"],
        ["uniform"],
        [16],
        ["metric", "relative"],
        ["tracking", "no tracking"],
    )
    assert len(plan) == 4
    assert ("qwen3.5-2b", "explicit", "relative", "no tracking", "uniform", 16) in plan


def test_build_plan_orders_by_frame_count_first():
    plan = sweep.build_plan(
        ["qwen3.5-2b"],
        ["explicit"],
        ["uniform"],
        [64, 16, 32],
        ["metric"],
        ["tracking"],
    )
    assert [frame_count for *_rest, frame_count in plan] == [16, 32, 64]


def test_build_plan_with_all_registered_models():
    plan = sweep.build_plan(
        list(vlm_models.available_models()),
        ["explicit"],
        ["uniform"],
        [16],
        ["metric"],
        ["tracking"],
    )
    assert len(plan) == len(vlm_models.available_models())


def test_sweep_parser_rejects_unknown_depth():
    with pytest.raises(ValueError):
        sweep._parse_csv_choice("bogus", sweep.DEPTH_VARIANTS, "--depths")


def test_sweep_parser_rejects_unknown_tracking():
    with pytest.raises(ValueError):
        sweep._parse_csv_choice("bogus", sweep.TRACKING_MODES, "--trackings")