use hcie_engine_api::Engine;

#[test]
fn test_layer_mask_api_and_editing() {
    let mut engine = Engine::new(100, 100);
    let layer_id = engine.active_layer_id();

    // Initially layer has no mask
    assert!(!engine.has_layer_mask(layer_id));
    assert!(engine.get_layer_mask_pixels(layer_id).is_none());

    // Add layer mask
    engine.add_layer_mask(layer_id);
    assert!(engine.has_layer_mask(layer_id));
    let mask = engine.get_layer_mask_pixels(layer_id).expect("Mask pixels must exist");
    assert_eq!(mask.len(), 100 * 100);
    assert_eq!(mask[0], 255);

    // Toggle mask editing mode
    assert!(!engine.is_editing_mask());
    engine.set_editing_mask(true);
    assert!(engine.is_editing_mask());

    // Set custom mask pixels
    let custom_mask = vec![128u8; 100 * 100];
    engine.set_layer_mask_pixels(layer_id, custom_mask.clone(), Some([0, 0, 100, 100]));
    assert_eq!(engine.get_layer_mask_pixels(layer_id), Some(custom_mask.as_slice()));

    // Remove layer mask
    engine.remove_layer_mask(layer_id);
    assert!(!engine.has_layer_mask(layer_id));
    assert!(engine.get_layer_mask_pixels(layer_id).is_none());
}