from pathlib import Path


ROOT = Path(__file__).resolve().parents[1]
RUNNER = (ROOT / "static/js/editor/ai-tool-runner.js").read_text(encoding="utf-8")
OPERATION = (ROOT / "static/js/editor/ai-operation.js").read_text(encoding="utf-8")


def test_ai_runner_keeps_busy_state_until_result_image_is_decoded():
    # Decoding lives in the shared, cancellable ai-operation helper.
    assert "const img = await decodeAIImage(data.image, operation.signal);" in RUNNER
    assert "image.onload = () => { cleanup(); resolve(image); };" in OPERATION
    assert "reject(new Error('Failed to decode result image'))" in OPERATION
    assert "layer.ctx.drawImage(img, 0, 0);" in RUNNER
    assert RUNNER.index("await decodeAIImage(") < RUNNER.index("layer.ctx.drawImage(img, 0, 0);")
    assert "} finally {\n      operation.finish();" in RUNNER


def test_ai_runner_does_not_commit_a_result_from_a_closed_editor():
    assert "if (!state.editorOpen) return; // user closed mid-decode" in RUNNER