import json
from pathlib import Path

from composer_ans.reporting import build_run_report, save_run_report_json
from composer_ans.types import CompositionRecord


def test_build_run_report_combines_timing_and_analysis() -> None:
    record = CompositionRecord(
        notes=(1, 2, 1, 2),
        per_note_seconds=(0.1, 0.2, 0.3, 0.4),
        total_seconds=1.0,
    )

    report = build_run_report(record, parameters={"object_threshold": 3})

    assert report.note_count == 4
    assert report.total_seconds == 1.0
    assert len(report.per_note_seconds) == 4
    assert report.parameters["object_threshold"] == 3
    assert 0.0 <= report.predictability <= 1.0


def test_save_run_report_json_writes_expected_fields(tmp_path: Path) -> None:
    record = CompositionRecord(notes=(1, 2, 3), per_note_seconds=(0.1, 0.2, 0.3), total_seconds=0.6)
    report = build_run_report(record)
    path = tmp_path / "report.json"

    save_run_report_json(report, str(path))
    data = json.loads(path.read_text(encoding="utf-8"))

    assert data["notes"] == [1, 2, 3]
    assert data["total_seconds"] == 0.6