from __future__ import annotations

from collections import Counter
from pathlib import Path

import h5py
import numpy as np

from src.t4_structural_dynamics_v1 import (
    CASE_DIR,
    case_config,
    configuration_design,
    load_config,
    valid_case_file,
)


def test_t4_v1_design_has_grouped_splits_and_explicit_ood_roles():
    rows = configuration_design()
    assert len(rows) == 128
    assert len({row["case_id"] for row in rows}) == 128
    assert Counter(row["split"] for row in rows) == {
        "train": 96,
        "validation": 16,
        "test": 16,
    }
    assert Counter(row["protocol_role"] for row in rows) == {
        "id": 120,
        "excitation_ood": 4,
        "parameter_ood": 4,
    }
    assert all(len(row["excitations"]) == 4 for row in rows)


def test_t4_v1_case_configuration_scales_sensors_with_geometry():
    global_config = load_config()
    row = configuration_design(global_config)[0]
    config = case_config(global_config, row)
    length = config["geometry"]["length_m"]
    height = config["geometry"]["height_m"]
    assert np.allclose(
        config["sensors"],
        [[fraction * length, 0.5 * height] for fraction in (0.2, 0.4, 0.6, 0.8, 1.0)],
    )


def test_t4_v1_first_production_case_is_complete_and_finite():
    path = CASE_DIR / "config_0000.h5"
    assert valid_case_file(path)
    with h5py.File(path, "r") as h5:
        assert h5.attrs["split"] == "train"
        assert len(h5["trajectories"]) == 4
        for trajectory in h5["trajectories"].values():
            assert trajectory["sensor_displacement_m"].shape == (4001, 5)
            assert trajectory["fields/displacement_m"].shape == (201, 245, 3)
            assert np.all(np.isfinite(trajectory["sensor_displacement_m"][...]))