"""slowmo factor:null must not TypeError (skip like non-positive)."""
from unittest.mock import patch, MagicMock
from blender_editor import _plan_fields, generate_bpy_script
from video_editor import _apply_edit_ffmpeg


def test_null_slowmo_factor_skipped_in_plan_fields():
    start, end, subtitle, slowmo = _plan_fields(
        {"start": 0.0, "end": 2.0, "effects": [{"type": "slowmo", "factor": None}]}
    )
    assert start == 0.0 and end == 2.0
    assert subtitle is None
    assert slowmo is None


def test_missing_slowmo_factor_still_defaults():
    _, _, _, slowmo = _plan_fields(
        {"start": 0.0, "end": 2.0, "effects": [{"type": "slowmo"}]}
    )
    assert slowmo == 2.0


def test_positive_slowmo_factor_kept():
    _, _, _, slowmo = _plan_fields(
        {"start": 0.0, "end": 2.0, "effects": [{"type": "slowmo", "factor": 3.0}]}
    )
    assert slowmo == 3.0


def test_generate_bpy_script_with_null_factor():
    script = generate_bpy_script(
        "/tmp/in.mp4",
        {"start": 0.0, "end": 1.0, "effects": [{"type": "slowmo", "factor": None}]},
        "/tmp/out.mp4",
    )
    assert "SLOWMO = None" in script


def test_apply_edit_ffmpeg_factor_speedup_and_bare_filename():
    plan = {
        "start": 0.0,
        "end": 2.0,
        "effects": [{"type": "slowmo", "factor": 0.5}]
    }
    with patch("video_editor.run") as mock_run:
        _apply_edit_ffmpeg("input.mp4", plan, "output.mp4")
        mock_run.assert_called_once()
        cmd = mock_run.call_args[0][0]
        assert "atempo=2.0" in cmd[cmd.index("-af") + 1]